Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Time division

Subclass of:

370 - Multiplex communications

370276000 - DUPLEX

370277000 - Communication over free space

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20130044653METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event that a plurality of cells is constructed, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating acknowledgement information on the PDCCH and/or PDSCH; and, if acknowledgement information transmission timing and channel state information transmission timing collide with each other, dropping the channel state information and transmitting only the acknowledgement information, or transmitting the acknowledgement information and the channel state information together in accordance with a predetermined condition.02-21-2013
20130044654METHOD AND APPARATUS FOR AGGREGATING CARRIERS OF A BACKHAUL CONNECTION - The described aspects include methods and apparatus for aggregating carriers over a backhaul link between a relay and an evolved Node B (eNB). A first set of subframes of at least a first carrier of a plurality of carriers configured for communicating with an eNB over a backhaul link can be determined. A second set of subframes of at least a second carrier of the plurality of carriers configured for backhaul link communications is also determined, wherein the second set of subframes are different from the first set of subframes. Data received over a plurality of access link carriers can then be communicated to the eNB over the first carrier and the second carrier based at least on the first set of subframes and the second set of subframes.02-21-2013
20130044652NOTIFYING A UL/DL CONFIGURATION IN LTE TDD SYSTEMS - A method for configuring a Time Division Duplex (TDD) Uplink/Downlink (UL/DL) allocation in a user equipment (UE) in a Long Term Evolved (LTE) network can include receiving, at a predefined period, during a connected state, each information block transmitted by an enhanced NodeB in the LTE network. Each information block may be transmitted in accordance with a fixed schedule having a predefined transmission period and includes information identifying a TDD configuration. Whether an updating of the TDD configuration is required can be determined for the UE based, at least in part, on the information identifying the TDD configuration in the information block, the information identifying the TDD configuration indicating an updated TDD configuration. In response to at least identifying the updated TDD configuration, the TDD UL/DL allocation of the UE can be automatically updated in accordance with the updated TDD configuration.02-21-2013
20130044651NOTIFYING A UL/DL CONFIGURATION IN LTE TDD SYSTEMS - A method for configuring a Time Division Duplex (TDD) Uplink/Downlink (UL/DL) allocation of a user equipment (UE) in a Long Term Evolution (LTE) network may include receiving an indicator, from an enhanced NodeB in the LTE network, on a physical channel identifying a TDD configuration for the UE and automatically updating the TDD UL/DL allocation of the UE in accordance with the TDD configuration.02-21-2013
20130028149METHOD AND APPARATUS FOR SIGNALING CONTROL DATA OF AGGREGATED CARRIERS - Techniques are provided for communicating control information for aggregated carriers. For example, a method includes receiving one or more assignments for a plurality of aggregated carriers. For example, the at least one of the plurality of aggregated carriers is a time division duplexing (TDD) carrier having a different subframe configuration than at least another one of the plurality of aggregated carriers. The method may include communicating control information for the plurality of aggregated carriers over one of the plurality of aggregated carriers.01-31-2013
20130028151METHOD AND SYSTEM FOR PHYSICAL RESOURCES CONFIGURATION AND SIGNAL TRANSMISSION WHEN COMMUNICATION SYSTEMS COEXIST - A method and system for configuring physical resource and signal transmission when communication systems coexist are provided. The method includes: configuring physical resources of the Wimax 16e frame according to LTE frame configuration information by following modes: configuring the number of downlink symbols in the Wimax 16e frame and shift time of the Wimax 16e frame relative to the half frame of the LTE frame according to the condition that the downlink region of the Wimax 16e frame is included in the downlink region of the LTE frame in time domain; and configuring the number of uplink symbols and time length of Transmission/Receive Transition Gap (TTG) in the Wimax 16e frame according to the condition that the uplink region of the Wimax 16e frame is included in the uplink region of the LTE frame in time domain; wherein, the uplink and downlink handover period of LTE frame is 5 ms.01-31-2013
20130028150Method and System for Wireless Communication in Multiple Operating Environments - A wireless communication method and system are provided. A first wireless communication numerology, e.g., OFDM operating parameters, corresponding to a first operational mode is established. A second wireless communication numerology corresponding to a second operational mode is also established. The first wireless communication numerology is different than the second wireless communication numerology. One of the first operational mode and the second operational mode is selected. One of the first wireless communication numerology and the second wireless communication numerology corresponding to the selected operational mode is used in which communication in the first operational mode and the second operational mode use substantially similar synchronization channels. The present invention also uses the same superframe structure for the first and second operational modes for Ultra-Mobile Broadband (“UMB”) networks and the same frame structure for the first and second operational modes for Long Term Evolution (“LTE”) networks.01-31-2013
20110182215TRANSMISSION OF CONTROL INFORMATION WITH CONFIGURABLE TIMELINE IN A WIRELESS COMMUNICATION SYSTEM - Techniques for sending acknowledgement (ACK) and/or other control information with a configurable timeline are described. A receiver may have limited processing resources and may need different amounts of time to process different amounts of data. The receiver may send ACK information earlier (or later) if less (or more) receive processing time is required. In one design, the receiver may receive a transmission of data in accordance with a grant, decode the received transmission to recover the data, and determine ACK information based on decoding result. The receiver may determine a frame to send the ACK information based on the grant. The determined frame may be one of multiple frames available for sending the ACK information. For example, different grant sizes may be associated with different frames. The receiver may send the ACK information for the transmission of data in the determined frame.07-28-2011
20120163254MULTI-BAND CHANNEL AGGREGATION - Multiple channels are aggregated. In an example embodiment, first data is transmitted on a first channel to a wireless device, and second data is simultaneously transmitted on a second channel to the wireless device. The first data and the second data are transmitted in a coordinated manner by aggregating the first channel and the second channel. Various example channel characteristics and combinations thereof are described. Different data allocation options for aggregated channels are described. Other alternative implementations are also presented herein.06-28-2012
20120163248Baton Handover From TDD-LTE to TD-SCDMA Systems - Certain aspects of the present disclosure propose techniques for performing a baton handover from TDD-LTE to TD-SCDMA systems. Certain aspects provide a method that generally includes receiving a handover command to handover from a base station (BS) of a first radio access technology (RAT) to a BS of a second RAT, switching uplink (UL) transmission from the BS of the first RAT to the BS of the second RAT, maintaining downlink (DL) transmission with the BS of the first RAT after switching the UL transmission to the BS of the second RAT, and switching the DL transmission from the BS of the first RAT to the BS of the second RAT after switching the UL transmission to the BS of the second RAT.06-28-2012
20090196204METHODS AND DEVICES RELATING TO DOWNLINK ASSIGNMENTS - The invention relates to a method in a first communication device of receiving control information over a radio channel from a second communication device. The first communication device receives a subframe over the radio channel, and determines whether the subframe is a downlink subframe with downlink assignment intended for the first communication device by reading data in the subframe. That being the case, the first communication device decodes data within the subframe, and determines whether any data packet being sent from the second communication device before the subframe has been missed by analysing an indicator associated to the subframe in the data. The indicator provides knowledge about previous downlink subframes with downlink assignment intended for the first communication device.08-06-2009
20090122730TDD system based cell handoff method and user equipment - The present invention discloses a cell handoff method and a user equipment based on a TDD system. The method includes: step A. a UE measures received pilot channels of a source cell and a neighboring cell according to a measurement control message and reports measurement result to a RNC; step B. the RNC, determines whether a target cell to be subject to a cell handoff process has available resources at a time slot different from that of the source cell and if yes, transmits a cell handoff command to the UE, allocates available resources for the UE in the target cell and transmits traffic carrier data of the UE to the source cell and the target cell respectively; and step C. after receiving the cell handoff command, the UE communicates with the source cell and the target cell at a same frame and at same time according to the allocated available resources. According to the handoff method of the present invention, UE can more reliably receive the handoff control command transmitted by the RNC and during the handoff process, the transmission power and interference are reduced so that the reliable handoff of a UE is guaranteed and the system performance is improved.05-14-2009
20080240001Time division duplex wireless network and associated method using modulation groups - A transceiver for use in a wireless access network comprising a plurality of base stations, each of the plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at a plurality of subscriber premises in a corresponding cell site of the wireless access network. The transceiver is associated with a first base station and comprises transmit path circuitry associated with a beam forming network for transmitting directed scanning beam signals in a sector of a cell site of the first base station. The transmit path circuitry transmits at a start of a TDD frame a broadcast beam signal comprising a start of frame field and subsequently transmits downlink data traffic in a downlink portion of the TDD frame to at least one of the wireless access devices using at least one directed scanning beam.10-02-2008
20130208633METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FEEDBACK INFORMATION - Disclosed are a method and an apparatus for transmitting ACK/NACK feedback information. By applying the technical solution of the present invention, when ACK/NACK feedback information is transmitted based on an ACK/NACK mapping table with a PUCCH format 1b with channel selection scheme, the problem of inconsistent detection results due to inconformity of the transmission scheme by a base station and a user equipment (UE) in the process of feeding back the ACK/NACK feedback information can be avoided, so as to implement a rollback of LTE Rel-8 PUCCH format 1a/1b.08-15-2013
20100074153Method and Apparatus in a Telecommunication System - Method and apparatus in a communication unit (03-25-2010
20100074152METHOD AND APPARATUS FOR TRANSMITTING DATA IN A TIME DIVISION DUPLEXED (TDD) COMMUNICATION SYSTEM - Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.03-25-2010
20100074151METHOD AND SYSTEM FOR REDUCING ADJACENT CHANNEL INTERFERENCE USING TIME DIVISION DUPLEX (TDD) - The present invention relates to communications systems comprising time division duplex, TDD, technologies, and more especially it relates to allocation of uplink and downlink communications in such communications systems in an orthogonal domain, such as frequency domain.03-25-2010
20130136039Microwave Backhaul System Having a Double Capacity Link - An all outdoor communication unit (ODU) microwave backhaul system and a split ODU microwave backhaul system, each configured to support a dual channel wireless link, are provided. Each microwave backhaul system includes an ODU having a processor configured to improve a quality of data (having a first and a second communication channel) by performing mathematical manipulation techniques on the data, a conversion, block configured to perform digital-to-analog and analog-to-digital conversions of the data, and a duplexer configured to facilitate substantially simultaneous communication of the first and second communication channels over the dual channel wireless link by optimizing a frequency separation between the first and second communication channels. Each microwave backhaul system also includes a modem assembly, located at either the ODU or at an indoor communication unit (IDU), which is configured to substantially simultaneously drive the first and second communication channels over the dual channel wireless link.05-30-2013
20130136038EQUIPMENT FOR FEMTOCELL TELECOMMUNICATIONS SYSTEM - A femtocell telecommunication system equipment comprising: a base apparatus structured to provide a first information signal and control signals; an electrical conductor based transmission line connected to said base apparatus; a bidirectional conversion apparatus adapted to receive/transmit from/on the transmission line the first signal and the control signals; the bidirectional apparatus comprising: a processing module structured to process the first signal to generate a second information signal and vice-versa; the second signal being adapted to be transmitted/received by an antenna device connectable to the bidirectional apparatus.05-30-2013
20130077542Hybrid In-Band/Out-of-Band Relays - In accordance with an embodiment, a method of operating a wireless relay device includes establishing a first connection to a base station using a first set of frequency bands, establishing a second connection to a user device using the first set of frequency bands, and establishing a third connection to the base station using a second set of frequency bands.03-28-2013
20130083707METHOD AND WIRELESS COMMUNICATION SYSTEM FOR PROVIDING DOWNLINK CONTROL SIGNALLING FOR COMMUNICATION APPARATUS - A method and a wireless communication system for providing downlink (DL) control signalling for a communication apparatus are provided. In the method, at least two scheduling cells are configured for providing DL control signalling, and the DL control signalling is provided on one or more of the at least two scheduling cells for a scheduled cell.04-04-2013
20130039233RADIO FRAME AND SOUNDING REFERENCE SIGNAL SENDING METHOD IN MOBILE COMMUNICATION SYSTEM - A radio frame and method are provided for sending a sounding reference signal (SRS) in a mobile communication system, which is used to solve the problem of shortage of resources for sending the SRS in the mobile communication system. The method includes a user equipment (UE) sending the SRS to eNB in time-frequency resources corresponding to a guard space in the radio frame, wherein, the guard space is one or more of downlink to uplink guard space, uplink to downlink guard space, reserved subframes, or reserved idle resources. A device is also provided for sending the SRS, applied to the UE in the mobile communication system, wherein the device includes a radio frame construction module and a sounding reference signal transmission module.02-14-2013
20130039235Method and Arrangement in a Wireless Communication System - Method and arrangement in a base station for sending data to a user equipment. The base station comprises an instance of a codebook, corresponding to another instance of the codebook comprised in the user equipment. The method comprises obtaining channel state information from a signal received from the user equipment, estimating a channel to be used for transmitting data to the user equipment, calculating a precoder, based on the obtained channel state information. Further is comprised the steps of selecting a precoding index from the codebook based on the calculated precoder, or selecting a precoding index received from the user equipment, precoding data to be transmitted to the user equipment using the calculated precoder and transmitting the precoded data, a non-user dedicated reference signal and the precoding index on the estimated channel to the user equipment. Further, corresponding method and arrangement in a user equipment are described.02-14-2013
20130039232METHOD FOR REPORTING CAPABILITY INFORMATION AND DUAL MODE USER EQUIPMENT ADAPTED THERETO - A system and a method that reports capability information regarding a dual mode User Equipment (UE) are provided. The UE supports Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The UE capability transmitting method includes receiving a message requesting UE capability information from an evolved Node B (eNB), generating first capability information and second capability information according to the UE capability information requesting message, and transmitting UE capability information including the first and second capability information to the eNB. The first capability information comprises FDD capability information applicable to an FDD mode or TDD capability information applicable to a TDD mode. The second capability information comprises capability information applicable to both the FDD mode and the TDD mode. The system and method can allow a dual mode UE to efficiently report its capability information.02-14-2013
20130039234Downlink transmission method and eNodeB in multiple input multiple output system - The disclosure provides a downlink transmission method and an eNodeB in a multiple input multiple output system. The method includes: obtaining channel quality indication of a User Equipment (UE) to generate a channel condition indication value; obtaining channel rank indication of the UE to generate a channel correlation indication value; obtaining uplink channel impulse response estimation data of the UE to generate a channel variation state indication value; selecting a downlink transmission mode according to the channel condition indication value, the channel correlation indication value and the channel variation state indication value; transmitting data to the UE in the selected downlink transmission mode. Because of extracting information from a current channel as a basis of a subsequent selection of the downlink mode, the disclosure can greatly improve a resource utilization ratio of a system and realize a better wireless transmission effect.02-14-2013
20130039229FRONTEND MODULE FOR TIME DIVISION DUPLEX (TDD) CARRIER AGGREGATION - A frontend module for Time Division Duplex (TDD) with Carrier Aggregation (CA), wherein the frontend module reuses the band selection filters for the aggregated bands and provides switched connections to antenna and transmitter/receiver according to the Uplink (UL)/Downlink (DL) configuration. The use of switches on both the antenna side and the transmitter/receiver side of the frontend module enables the reuse of the band selection filters. The frontend module according to the present invention reduces the number of required filters to only one filter for each TDD-CA Component Carrier (CC) band. Thus, the frontend module avoids unnecessary band selection filters, and thereby also controls the cost of implementation of frontend modules in wireless units operating in the TDD-CA mode.02-14-2013
20130039231Method of Uplink Control Information Transmission - A method of uplink control information transmission for a mobile device with carrier aggregation in a wireless communication system is disclosed. The method comprises being configured a plurality of cells including a primary cell and at least a secondary cell by a network of the wireless communication system, determining to transmit the uplink control information in a transmission time interval, and when the primary cell has no uplink resource for the uplink control information transmission, transmitting the uplink control information on at least a secondary cell having uplink resources in the TTI.02-14-2013
20130039230Method and Device for Wireless Broadcast Power-up Sequence in Wireless Sensor Network - Method and device for smart power management of the sensor nodes within a wireless sensor network to achieve extremely low standby current and fast power-up time at the same time are provided. The method features a technique of centralized remote power-up scheme combined with local broadcasting power-up sequence to achieve fast power-up time and extended power-up coverage. It can manage the power-down sequence from a base-station to sensor nodes sequentially, while the power-up sequence broadcasts its power-up command from the base-station to all the sensor nodes within a sensor network. The device accepts same frequency band for both data communication and power-up message, and a RF switch separates receiving RF data and RF power-up message. The wireless power-up receiver is self-powered from power-up message and also generates power-up enable signal from it.02-14-2013
20130083706METHOD AND APPARATUS FOR IMPROVING TDD (TIME DIVISION DUPLEX) INTERBAND CARRIER AGGREGATION (CA) IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus are disclosed to perform TDD interband carrier aggregation in a wireless communication system. The method includes aggregating cells with different TDD UL-DL (Uplink-Downlink) configurations, wherein the cells have different DL-to-UL (Downlink-to-Uplink) switch point periodicities. The method further includes determining conflict subframes according to dynamic scheduling.04-04-2013
20130034028ALLOCATING PHYSICAL HYBRID ARQ INDICATOR CHANNEL (PHICH) RESOURCES - Certain aspects of the present disclosure relate to techniques for allocating resources for Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH).02-07-2013
20100046404ACQUISITION CIRCUIT FOR LOW CHIP RATE OPTION FOR MOBILE TELECOMMUNICATION SYSTEM - A User Equipment (UE) receives and samples communication signals, where the communication signals have a time frame format, a transmission chip rate and a synchronization code associated with a time slot that includes a midamble that indicates a modulation of the synchronization code where a specified modulation of received synchronization codes identifies the timing for a timeslot in which data is to be received. The UE preferably includes a synchronization code determination circuit, a midamble determination circuit, and a phase modulation sequence detection circuit operatively associated with the midamble determination circuit. The UE can be configured for use with the low chip rate option of the Third Generation Partnership Project (3GPP) Universal Mobile Telecommunication System (UMTS) standards that employ a predefined set of downlink SYNC codes that point to midambles which indicate SYNC code modulation sequence to enables reading of data in a subsequent Broadcast Channel (BCH) message.02-25-2010
20100046403MOBILE COMMUNICATIONS SYSTEM, BASE STATION, USER APPARATUS, AND METHOD - A mobile communications system is disclosed. The mobile communications system includes: a first user apparatus for two-way communicating using frequency division duplex (FDD); a second user apparatus for two-way communicating using time division duplex (TDD); and a base station for communicating with the first and second user apparatuses. The base station distinguishes among the simultaneous transmitting and receiving schemes of the user apparatuses based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme that is included in an uplink control channel, or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme.02-25-2010
20100046402METHOD FOR OPERATING RADIO COMMUNICATION SYSTEM, INCLUDING SENDING STATION AND RECEIVING STATION THEREOF - In a radio communication system, at least a first frequency band is subdivided into C radio resource units which are allocable for radio transmissions between radio stations and terminals. Each radio resource unit has at least two adjacent subcarriers, for allocation of at least a first resource unit for a data transmission between a terminal and a radio station. The radio station receives from the terminal a first short training symbol which has spectrally the same bandwidth as the first frequency band and includes at least Q frequency carriers, where Q is greater or equal to C, but smaller than the total number of subcarriers. The radio station estimates the radio channel for at least the first radio resource unit using the first short training symbol, and an allocation of the first radio resource unit to the terminal is broadcasted by the radio station.02-25-2010
20130034029TDD WIRELESS COMMUNICATION SYSTEM AND METHOD FOR REPORTING HARQ-ACK - A method for reporting Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) is provided. The method is applicable to a time-division duplex (TDD) wireless communication system and includes the following steps: receiving downlink information from a base station with multiple serving cells, calculating a report number of each serving cell, which is a number of subframes of the corresponding serving cell whose acknowledgements have to be reported, and providing report information to the base station in an uplink subframe of a serving cell specified by the base station. The multiple serving cells use multiple uplink-downlink configurations. The report number of at least one of the serving cells is determined according to a downlink association set of the uplink subframe of the serving cell specified by the base station. The report information includes the acknowledgements that have to be reported by each of the serving cells.02-07-2013
20100322115Reference Signal Sounding for Uplink Pilot Time Slot in Wireless Communication System - A wireless terminal operating in TDD mode transmits a plurality of sounding reference signals using an assigned maximum sounding reference signal (SRS) bandwidth (BW) size. At least one of the sounding reference signals is transmitted in a corresponding uplink pilot time slot (UpPTS) region of a special sub-frame of a radio frame wherein, in the frequency dimension, an uplink BW center is misaligned with a BW center of the SRS in the UpPTS region, a maximum SRS BW size in the UpPTS region is an even number of resource blocks with prime factors from a set of {2, 3, 5}, and the maximum SRS BW having a size in number of resource blocks less than or equal to (N12-23-2010
20120263079TDD FDD Communication Interface - TDD access equipment modified by introducing a frequency change at the normal TDD guard point, with respective downlink or uplink periods for individual subscriber stations offset to form overlapping frames. Cyclo-stationary processing, block equalization, and burst timing coordination allow the boundary between downlink and uplink portions of both frames to be set dynamically, improving spectral efficiency. Fast frequency switching within an allotted physical slot enables synchronization of time-sharing the dedicated frequencies to be maintained among subscriber stations. Duplex spacing between downlink and uplink frequencies for individual subscriber stations, combined with in-depth filtering of received signals, prevents spurious out-of-band transmission signal strength from reaching an interference level.10-18-2012
20090154378Base station, mobile terminal, and communications method - A base station, to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, communicates with a mobile terminal according to Time Division Duplex, in which a transmission frame includes a downlink subframe and an uplink subframe. The base station includes multiple antennas; a radio communications part configured to transmit the downlink subframe through a first one of the antennas and to receive an initial ranging code transmitted by the mobile terminal through a second one of the antennas during the transmission of the downlink subframe; and a ranging processing part configured to perform ranging based on the initial ranging code received by the radio communications part.06-18-2009
20090154379RADIO RESOURCE ALLOCATION SYSTEM AND ROADSIDE EQUIPMENT - A radio resource allocation system in which equipment placed on a road allocates a radio resource to in-vehicle equipment that exists in a given area is provided. The radio resource allocation system includes the in-vehicle equipment mounted on a vehicle that communicates with another in-vehicle equipment by using the radio resource. The in-vehicle equipment includes a signal transmitting unit that transmits a signal showing that the own vehicle exists in the given area. The roadside equipment includes a radio resource allocation unit that allocates the radio resource to the in-vehicle equipment when the roadside equipment receives the signal transmitted by the signal transmitting unit, and a radio resource release unit that releases the radio resource when the roadside equipment does not receive the signal from the in-vehicle equipment that is allocated the radio resource by the radio resource allocation unit.06-18-2009
20100039966WIRELESS COMMUNICATIONS SYSTEMS - A method of requesting a plurality of different characteristic indicators from a second communications apparatus in a wireless communications network comprising a first communications apparatus and a plurality of such second communications apparatuses which communicate with the first communications apparatus, the method includes the first communications apparatus transmitting a single standing instruction to the second communications apparatus defining at least two interleaving patterns, each interleaving pattern specifying two or more of the characteristic indicators and defining a pattern according to which the second communications apparatus is to interleave the specified characteristic indicators in a single feedback channel allocated to the second communications apparatus, the single standing instruction further defining a selection signal to be transmitted from the first communications apparatus to the second communications apparatus according to which the second communications apparatus is to select one of the interleaving patterns.02-18-2010
20130083709METHOD AND DEVICE FOR TRANSMITTING ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and a device for transmitting an acknowledgement. A terminal receives at least one downlink transport block from at least one serving cell. The terminal selects one of an explicit resource and an implicit resource, and transmits an acknowledgement for at least one said downlink transport block by using the selected resource.04-04-2013
20130083708METHOD AND APPARATUS FOR IMPROVEMENT OF TDD INTER-BAND CARRIER AGGREGATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for TDD inter-band carrier aggregation in a wireless communication system includes performing aggregating multiple cells with different TDD UL-DL configurations, transmitting a PUSCH transmission on a first cell, the subframe for HARQ feedback reception for the PUSCH in a first cell colliding with a UL subframe in a second cell, and performing one of setting the corresponding HARQ feedback to ACK, flushing the corresponding HARQ buffer, and changing the corresponding HARQ feedback subframe for the PUSCH to another subframe.04-04-2013
20130083705TIME DIVISION DUPLEX ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING DISTRIBUTED ANTENNA SYSTEM, BASE STATION AND REMOTE ACCESS UNIT - A time division duplex orthogonal frequency division multiplexing (TDD-OFDM) distributed antenna system (DAS), a base station and a remote access unit for the same are provided. The base station performs an inverse fast Fourier transform on a user downlink signal, a transmitting/receiving enable signal and an input control signal to generate a first OFDM signal. The user downlink signal is carried on a used subcarrier set of the first OFDM signal, while the transmitting/receiving enable signal and the input control signal are carried on a guard band subcarrier set of the first OFDM signal. The remote access unit receives the first OFDM signal via a fiber transmission line, switches between a transmitting mode and a receiving mode periodically, performs a clock synchronization with the base station according to the transmitting/receiving enable signal, and performs a system configuration according to the input control signal.04-04-2013
20080219191ROBUST SYNCHRONIZATION FOR TIME DIVISION DUPLEX SIGNAL - The present invention relates to a method, apparatus, system and computer program product, wherein a time division multiplex signal is received with a periodic first time period allocated to a downlink transmissions and a periodic second time period allocated to uplink transmissions. A decision time metric is obtained by correlating the received signal with a replica signal in order to detect a synchronization pattern provided in the first time period. Then, a slide window based normalization with a time window long enough to accommodate said second time period is applied to the decision time metric.09-11-2008
20100329159PHYSICAL UPLINK CONTROL SIGNAL TRANSMITTING METHOD FOR TIME DIVISION DUPLEX SYSTEM - A method for transmitting a physical uplink control signal in a time division duplex system, wherein the uplink control signal is more than 2 bits. The method comprises the following steps of: a base station distributing a plurality of uplink channel code resources of a physical uplink control channel (PUCCH) for a user equipment, and making an agreement with the user equipment to transmit different contents represented by the uplink control signal using different uplink channel code resources; the user equipment selecting one or more uplink channel code resources from the distributed uplink channel code resources according to the content of the uplink control signal to be transmitted, and transmitting the uplink control signal on the physical uplink control channel.12-30-2010
20120182908METHOD AND USER EQUIPMENT FOR SENDING UPLINK RESOURCE SCHEDULING REQUEST - A method for a user equipment sending an uplink resource scheduling request in a long term evolution mobile communication system and the user equipment thereof are provided. The present invention relates to a technique for the user equipment sending the uplink resource scheduling request in a long term evolution system, for reducing the user data transmission delay. The embodiments of the present invention set the minimum alternative option of the scheduling request transmission cycle configuration parameter as 2 ms or 1 ms, that is to say, add 2 ms or 1 ms, or 2 ms and 1 ms to the alternative option of the scheduling request transmission cycle configuration parameter, therefore, improving the flexibility of the whole system in the scheduling request transmission cycle configuration. When the data delay is required to be less, the user data transmission delay can be reduced, by using the 2 ms or 1 ms scheduling request transmission cycle configuration, to the delay requirement of 10 ms as close as possible.07-19-2012
20120182907METHODS AND APPARATUS FOR CONTROLLING PEER TO PEER COMMUNICATIONS - A wireless communications system supports both cellular communications and direct peer to peer communications. The cellular communications use FDD downlink and uplink bands for control and traffic signaling. An access point employs control over direct peer to peer communications. Peer to peer mode control signals from the access point are transmitted to wireless terminals using the FDD cellular downlink band. Peer to peer mode control signals from wireless terminals are transmitted to an access point using the FDD cellular uplink band. Peer to peer traffic signals between wireless terminals are communicated using a TDD band. In one embodiment, the access point communicates priority information to peer to peer network wireless terminals, and the wireless terminals make peer to peer traffic transmission decisions in a decentralized manner using the received priority information. In another embodiment, the access point directly schedules peer to peer traffic in the peer to peer network.07-19-2012
20130070652METHOD AND APPARATUS FOR SOFT BUFFER PROCESSING - A network side equipment, a user equipment, and a method for soft buffer processing are provided. The method includes allocating, by a base station, transmission resource for a User Equipment (UE), and processing a soft buffer according to at least one parameter of the soft buffer, when uplink and downlink configurations of a plurality of cells of the UE Carrier Aggregation (CA) are different, sending, by the base station, data to the UE by a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH), wherein the at least one parameter of soft buffer is determined by at least one of a Primary cell (Pcell) and a Secondary cell (Scell) uplink and downlink configurations of the UE, and wherein rate matching is performed on the PDSCH.03-21-2013
20100002607Collaborative mimo using sounding channel in multi-cell environment - A collaborative MIMO method using a sounding channel in a multi-cell environment is disclosed. The method includes acquiring, by a first base station providing a service for a first cell, first CSI of a first downlink channel between the first base station and a mobile station, transmitting, to a second base station, a signal including information requesting that the second base station providing a service for a second cell acquire second CSI of a second downlink channel between the second base station and the mobile station, and acquiring, by the second base station, the second CSI. The mobile station is served by the first base station.01-07-2010
20130089010METHODS AND APPARATUS FOR SUPPORTING PEER TO PEER COMMUNICATIONS - Methods and apparatus for supporting peer to peer and infrastructure, e.g., cellular, communication in a multimode device which can operate in a cellular system are described. Methods and apparatus for supporting peer to peer devices are also described. Peer to peer communication occurs within a switching time period during which infrastructure signaling does not occur and devices switch between an uplink and a downlink mode of infrastructure operation. The time period set for the switching time period is intentionally set larger, e.g., 10, 50, 100 or even more times larger than that required based on maximum cell size. Thus, a peer to peer communications period can be introduced into a TDD system and use the same frequency band as the TDD system in a manner that can remain compliant with a cellular communications protocol which allows for a switching time period, e.g., set in the system by a parameter.04-11-2013
20090303906Allocation Of A Communications Channel To a Data Transfer Session - A method of allocating a communications channel to a data transfer session, the method including during the data transfer session: sending a first data transfer session packet via the communications channel then sending an additional packet or packets, that are not a part of the data transfer session, via the communications channel to hold the communications channel for the data transfer session.12-10-2009
20100067410METHOD FOR TRANSMITTING UPLINK SOUNDING REFERENCE SIGNAL FOR LTE SYSTEM - A method for transmitting an uplink sounding reference signal includes indexing Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols within a single radio frame for transmitting a Sounding Reference Signal (SRS) as a number k, and calculating a value of n03-18-2010
20120218922METHODS AND APPARATUS FOR EMPLOYING DIFFERENT CAPABILITIES FOR DIFFERENT DUPLEXING MODES - Certain aspects of the present disclosure propose techniques for independently signaling features supported by a user equipment (UE) in different duplexing modes. The UE may be capable of communicating in frequency division duplexing (FDD) and time division duplexing (TDD) modes. The UE may obtain a FDD-specific feature group indicators (FGIs) set and a TDD-specific FGIs set, and signal at least one of the FDD-specific FGIs set or TDD-specific FGIs set. In addition, the UE may take one or more actions to reduce the likelihood of transitioning to a mode of operation that is different from its current mode of operation.08-30-2012
20090040950Time division duplex (TDD) - In accordance with the principles of the present invention, a radio system is provided. A master multiplexer is adapted to receiving an input signal. A slave multiplexer is adapted to send an output signal. A timing master radio is connected to the master multiplexer and a timing slave radio is connected to the slave multiplexer, with the timing master radio and the timing slave radio adapted to communicate over a wireless connection. The timing master radio and timing slave radio use complementary TDD frame structures, controlled by the timing master radio, as is common in the art. The master multiplexer further comprising the timing mechanism that recovers timing embedded in the input signal, keeps track of the total number of bits received, and utilizes the total number of bits received thereby maintaining timing. The master multiplexer comprises a packet mechanism that generates a packet. The master multiplexer also provides a method for determining the TDD frame size and phase, and measuring over-the-air data rate of a radio channel.02-12-2009
20110058507WIRELESS COMMUNICATION SYSTEM, BASE STATION, CHANNEL ALLOCATION METHOD, AND PROGRAM - A wireless communication system according to the present invention includes a terminal and a base station for forming a plurality of sectors and receiving an uplink subframe from said terminal positioned in any of said plurality of sectors, according to an OFDMA/TDD scheme. Here, in said uplink subframe, said base station allocates a predetermined subchannel among subchannels usable by said base station to two predetermined sectors among said plurality of sectors in said uplink subframe, according to time division.03-10-2011
20120307691Method and apparatus for decoding physical broadcast channel in time division duplexing system - The disclosure discloses a method for decoding a Physical Broadcast Channel (PBCH) in a Time Division Duplexing (TDD) system, which includes: performing de-Multiple Input Multiple Output (MIMO) processing on received data frames respectively according to antenna modes supported by the TDD system and buffering the data frames; descrambling the data frames which are buffered and subjected to the de-MIMO processing and combining, in unit of frame, the data frames descrambled in respective antenna modes; and decoding the data frames combined. The disclosure further discloses an apparatus for decoding a PBCH in a TDD system. The disclosure greatly improves the speed, correctness and performance for decoding PBCH data frames.12-06-2012
20090268644USER EQUIPMENT FOR SYNCHRONIZING TO A TDD BASE STATION - A time division duplex (TDD) user equipment (UE) is configured to synchronize to a TDD base station. The UE includes an antenna, a primary synchronization code matched filter, a first plurality of secondary synchronization code matched filters, a second plurality of secondary synchronization code matched filters, and a processor in communication with the first and second plurality of secondary synchronization code matched filters. The first plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a first carrier and the second plurality of secondary synchronization code matched filters determines secondary synchronization codes sent on a second carrier. The processor is configured to determine a code group assignment and selected timeslot based upon an analysis of the secondary synchronization codes sent on the first and second carriers.10-29-2009
20120224515BASE STATION AND SIGNAL PROCESSING METHOD - A base station receives from a mobile station, a reference signal that includes two or more sequences of a fixed length and calculates, as information for uplink signal synchronization at the mobile station, delay with respect to a reference time of the reference signal. The base station includes a first correlator that calculates the delay and a first correlation value calculated by correlating known sequences and the reference signal received during a first interval set based on the reference time and including a period equivalent to the fixed length; a second correlator that calculates a second correlation value by correlating the known sequences and the reference signal received during a second interval different from the first interval and including a period equivalent to the fixed length; and a corrector that based on a comparison result of the first and the second correlation values, determines whether to correct the calculated delay.09-06-2012
20130064146DIRECT CONNECTION COMMUNICATION BETWEEN TERMINALS AND METHOD FOR DIRECTLY TRANSMITTING AND RECEIVING DATA BETWEEN TERMINALS FOR A TERMINAL RELAY - Disclosed is a method for directly transmitting and receiving data between terminals in a frequency division duplexing (FDD)-type and time division duplexing (TDD)-type mobile communication system. For FDD-type systems, provided are methods for performing direct data transmission and reception between terminals on the basis of a downlink subframe time interval and methods for performing direct data transmission and reception between terminals on the basis of an uplink subframe time interval. For TDD-type systems, provided are methods for performing direct data transmission and reception between terminals in a downlink subframe and methods for performing direct data transmission and reception between terminals in an uplink subframe. Additionally, for each method, provided are systems for performing only reception or transmission in one subframe and systems for performing both reception and transmission in one subframe.03-14-2013
20130064147BASE STATION AND COMMUNICATION METHOD OF BASE STATION - Appropriate AAS control is achieved by a base station having a plurality of antennas for performing a radio communication with the mobile station by employing Time Division Duplex including an assignment unit for assigning a radio resource to the mobile station, a request unit for requesting the mobile station to transmit a reference signal using a reference signal area of an uplink radio resource in the same frequency band as a downlink radio resource, when the uplink radio resource for an uplink communication in the same frequency band as the downlink radio resource for a downlink communication is not assigned to the mobile station by the assignment unit, and a calculation unit for receiving the reference signal and, based on the reference signal, for calculating a weight used for transmitting a radio signal on the downlink communication channel.03-14-2013
20130064145METHOD, APPARATUS AND COMPUTER PROGRAM FOR SETTING A RADIO FREQUENCY GAIN - In setting a radio frequency gain for wireless communications during an initial synchronization phase, at least an upper threshold value (03-14-2013
20090046605Uplink scheduling grant for time division duplex with asymmetric uplink and downlink configuration - Singalling uplink and downlink scheduling grants for a plurality of subframes in a time division duplex frame is addressed. In one aspect the allocated uplink subframes are divided into groups, so the number of groups equals the number of downlink subframes being allocated. Uplink grants for the groups are sent with the downlink grants, and for those groups that have more than one uplink subframe, the grant message also indicates which uplink subframes are included in that group. In another aspect there are two sets of grant messages, one for the uplink subframes and one for the downlink subframes. Each of the uplink grant messages is sent on a different uplink grant message, and there is a one-to-one correspondence between the uplink grant channel and the uplink subframe being scheduled by the grant. That correspondence may also be signalled with the grant messages.02-19-2009
20090046604WIRELESS COMMUNICATION METHOD, BASE STATION APPARATUS AND MOBILE STATION APPARATUS - A wireless communication method for improving the transmission efficiency in an upstream communication in OFDMA-TDD system or the like. An upstream transmission timing control part (02-19-2009
20090279460BUNDLING OF ACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for bundling acknowledgement (ACK) information in a wireless communication system are described. In one design, a user equipment (UE) may receive multiple codewords in at least one downlink subframe. The UE may decode the multiple codewords and determine an ACK or a negative acknowledgement (NACK) for each codeword based on decoding result. The UE may bundle the ACKs and NACKs for the multiple codewords to obtain bundled ACK information. In one design, the UE may generate (i) a bundled ACK if ACKs are obtained for all codewords or (ii) a bundled NACK if a NACK is obtained for any codeword. The UE may send the bundled ACK information as feedback for the multiple codewords. The UE may receive retransmissions of the multiple codewords if a bundled NACK is sent and may receive new codewords if a bundled ACK is sent.11-12-2009
20090010185PEER TO PEER COMMUNICATIONS METHODS AND APPARATUS PROVIDING FOR USE OF BOTH WAN UPLINK AND DOWNLINK BANDS - Methods and apparatus for supporting peer to peer communications are described. A peer to peer communications device uses both wide area network (WAN) uplink and downlink communications air link resources for peer to peer signaling. During an uplink share mode of operation a peer to peer wireless terminal uses a wide area network uplink communications band to communicate peer to peer signals, and the peer to peer wireless terminal implements a first transmission power control function. During a downlink share mode of operation, the peer to peer wireless terminal uses a wide area network downlink communications band to communicate peer to peer signals, and the peer to peer wireless terminal implements a second transmission power control function. The second power control function is different from the first power control function.01-08-2009
20130215802Transmitting methods of a signal on a random access channel in a wireless communication system - A transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. Another transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a cyclic prefix and a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. The methods can avoid the interference of the preamble to the data of the uplink subframe, and can improve the coverage area of the random access channel and the work efficiency of the time division duplex system.08-22-2013
20100085902TIME REVERSAL METHOD OF PROCESSING SYMBOLS IN BIDIRECTIONAL COMMUNICATION - For processing symbols transmitted in frames and separated by guard slots via a propagation channel between first and second communicating entities (EC04-08-2010
20120236767Power Control Method, Base Station and Terminal for Physical Uplink Control Channel - A power control method for a Physical Uplink Control Channel, which includes: when the response information of multiple Physical Downlink Shared Channels (PDSCH) sent by a base station over multiple component carriers is sent on one Physical Uplink Control Channel (PUCCH), the base station indicating a unified transmitted power control command for the Physical Uplink Control Channel; or the base station indicating multiple transmitted power control commands for the Physical Uplink Control Channel. The present invention also provides a base station and a user equipment.09-20-2012
20120236766Method and System for Coexistence in a Multiband, Multistandard Communication System Utilizing a Plurality of Phase Locked Loops - Methods and systems for coexistence in a multiband, multistandard communication system utilizing a plurality of phase locked loops (PLLs) are disclosed. Aspects may include determining one or more desired frequencies of operation of a transceiver, determining a frequency of unwanted signals such as spurs, intermodulation, and/or mixing product signals, and configuring the PLLs to operate at a multiple of the desired frequencies while avoiding the unwanted signals. The desired frequencies may be generated utilizing integer, which may include multi-modulus dividers. The wireless standards may include LTE, GSM, EDGE, GPS, Bluetooth, WiFi, and/or WCDMA, for example. The frequencies may be configured to mitigate interference. PLLs may be shared when operating in TDD mode, and used separately operating in FDD mode. One or more digital interface signals, zero exceptions on a transmitter spur emission mask, and sampling clocks for ADCs and/or DACs in the transceiver may be generated utilizing the PLLs.09-20-2012
20120236765Method and system for synchronizing network nodes in time division duplex system - The disclosure discloses a method for synchronizing network nodes in a time division duplex system. The method includes that: a network node acquires the cell identity information of other network nodes, and inquires the synchronization status information of the other network nodes from a synchronization information node according to the cell identity information; the network node implements synchronization policy according to its own synchronization status and the inquired synchronization status of the other network nodes. A system for synchronizing the network nodes in the time division duplex system is also disclosed, which includes an acquiring unit (09-20-2012
20130163484APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SIGNALS BY USING A PRESET FRAME STRUCTURE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to an apparatus and a method for transmitting/receiving signals by using a preset frame structure in a wireless communication system. As there are difficulties ensuring the link capacity and quality for a high speed moving object with the existing frame structure and the antenna arrangement and communication system based on the existing scheme, a new frame structure needs to be proposed. According to one example of those newly proposed frame structures, one frame is composed of 8 subframes, each of the 8 subframes being composed of orthogonal frequency division multiple access (OFDMA) symbols in a range of 11 to 14, and the cyclic prefix (CP) length of the frame is ⅛ or less of an effective symbol length (e.g., ⅛, 1/16, 1/31, 1/64).06-27-2013
20130163485METHOD AND DEVICE FOR ALLOCATING BACKHAUL LINK RESOURCE - Embodiments of the present invention provide a method and a device for allocating a backhaul link resource. The method includes: selecting, by a first base station, at least one subframe in an uplink (UL) frequency band in a frequency division duplex (FDD) wireless communication system; and allocating the selected at least one subframe as a backhaul link resource between the first base station and a second base station. With the method, the device and the system for allocating a backhaul link resource according to the embodiments of the present invention, a subframe is selected in an unexhausted frequency band in existing bandwidth resources and allocated to a wireless backhaul link. Therefore, the existing bandwidth resources are released, resources are allocated to wireless backhaul links, and costs of the communication system are saved.06-27-2013
20090122731PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION - Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.05-14-2009
20100172272PROVISION OF INTER-FREQUENCY SUBFRAME CONFIGURATION IN WIRELESS COMMUNICATION - Providing for inter-frequency timing provision in wireless communication is disclosed herein. By way of example, cells of a wireless network can be configured to acquire information pertaining to subframe timing configurations employed by nearby wireless cells, including cells that employ a different frequency as an acquiring cell. The subframe timing configuration can be forwarded to access terminals served by the acquiring cell, to facilitate proper reception of neighboring signals, including on the different frequency. Various formats are disclosed herein for conveying subframe timing configurations, including a single bit format and multiple bit formats, which can specify various ranges of timing information in relation to a known timing, or can specify a complete subframe timing configuration for one or more such cells.07-08-2010
20110280162Multiple Antenna Method And Apparatus For Reducing Inter-Cell Interference In Multi-User Wireless Systems - A method is provided to reduce inter-cell interference in mobile wireless systems, and particularly in TDD wireless systems. In an embodiment, a base station receives a pilot signal from at least one of the mobile terminals that it serves at a plurality of base station antennas, which include both main antennas and auxiliary antennas. In response, each of the base station antennas provides an output that is processed to obtain a set of precoding weights for a transmission from the main antennas. The processing includes nulling at least one interfering signal using the outputs from at least the auxiliary antennas.11-17-2011
20110170461RADIO RELAY DEVICE AND RADIO RELAY METHOD - A radio relay device (07-14-2011
20100246455PHICH Resource Signaling in a Wireless Communication System - A wireless communication terminal and method for determining a number of Physical Hybrid ARQ Indicator Channel (PHICH) groups (N) in the downlink subframe based on a first parameter, a second parameter and a determined cyclic prefix (CP) duration, wherein the first parameter indicates a downlink system bandwidth in terms of a number of resource blocks and the second parameter indicates a scaling factor. The terminal receives downlink control signaling in a set of resource elements in the subframe, wherein the set of resource elements is determined based partly on the number of PHICH groups (N).09-30-2010
20100182939CONFIGURATION OF MULTI-PERIODICITY SEMI-PERSISTENT SCHEDULING FOR TIME DIVISION DUPLEX OPERATION IN A PACKET-BASED WIRELESS COMMUNICATION SYSTEM - Systems and methods for determining the periodicity for a multiple periodicity SPS allocation using implicit rules for a TDD communications system are disclosed. A communication terminal such as a UE is provided that may determine the periodicity for a multiple periodicity SPS allocation using implicit rules to calculate a delta value to form a long time period and a shorter time period, forming a periodic pattern where the rules depend on the TDD configuration being used. In another embodiment a communication terminal such as a UE is provided that may determine the periodicity for a multiple periodicity SPS allocation using implicit rules to calculate a delta value to form a long time period and a shorter time period forming a periodic pattern, where the rules depend on the TDD configuration being used and the HARQ process being used.07-22-2010
20110002243SUPPORTING MOBILE AD-HOC NETWORK (MANET) AND POINT TO MULTI-POINT (PMP) COMMUNICATIONS AMONG NODES IN A WIRELESS NETWORK - Nodes in a wireless network participate in either point-to-multipoint (PMP) or MANET/mesh communications with other nodes on one or more shared channels of the network. A first or base station node transmits a downlink signal having a time frame structure of determined duration to a number of second or subscriber nodes. Portions of the frame structure establish (i) first time periods during which messages are transmitted from the first node to the second nodes, and (ii) second time periods during which messages are transmitted from the second nodes to the first node, using the PMP protocol on one or more shared channels or subchannels of the network. Other portions of the time frame structure establish third time periods during which nodes communicate with one another using the MANET/mesh protocol on the shared channels or subchannels, while avoiding interference with messages transmitted under the PMP protocol.01-06-2011
20110286370UTILIZATION METHOD AND APPARATUS FOR GUARD BAND - A utilization method and apparatus for guard band, used under the premise that side-channel interference is suppressed when a time division duplex (TDD) system and a frequency division duplex (FDD) system coexist, utilizes guard band effectively and increases utilization rate of mobile communication spectrum resources. The utilization method for guard band comprises: a first base station in a TDD system allocates a first frequency resource within an uplink guard band to a first user equipment and issues resource scheduling information (S11-24-2011
20110286369Wireless communication system - In a wireless communication system, a central control unit 11-24-2011
20120294203DUAL CHANNEL TIME DIVISION DUPLEX (TDD) COMMUNICATION - A system and method to use existing Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX) based signaling to effectuate dual-channel Time Division Duplex (TDD) communication between two transceivers giving preference to one type of subframes (either downlink or uplink) for data transmission. In backhaul communications between pico (or femto) and macro base stations, using LTE and WiMAX's TDD mode in such a manner effectively reduces unnecessary transmissions of pilot and synchronization sequence in downlink signaling, thereby reducing the level of pilot overhead and minimizing interference when data is not being transmitted. Similarly, the use of existing LTE (or WiMAX) implementations of TDD radio frames in this manner may achieve radio silence for some duration (e.g., when no uplink sub-frames are transmitted) when operating in a license-exempt spectrum, thereby allowing other license-exempt devices to potentially share the radio channel during the silence period.11-22-2012
20120099492APPARATUS AND METHOD FOR PERFORMING UPLINK COMMUNICATION BY MEANS OF RELAY STATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for performing Uplink (UL) communication by a Relay Station (RS) in a wireless communication system are provided. The RS receives a Transmit/receive Transition Gap (TTG) and a Receive/transmit Transition Gap (RTG) of a Base Station (BS) during a network entry process of the RS, receives, from the BS, an idle time R_IdleTime between frames used in the RS, and determines a structure of a UL frame. In the alternative, the RS determines a time interval Tad or an idle time R_IdleTime according to a predetermined scheme, and transmits the Tad or the R_IdleTime to the BS. The proposed apparatus and method reduce an overhead of a frame structure when the RS transitions from a transmission mode to a reception mode or from a reception mode to a transmission mode, the frame structure being for frames of the BS and it adjacent RS, thereby reducing interference.04-26-2012
20120002575 METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING A SIGNAL USING A TIME DIVISION DUPLEXING FRAME STRUCTURE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to transmission and reception of a frame for a legacy support mode of IEEE 802.16m system for supporting a legacy system. A method of transmitting an uplink signal, in which a signal is transmitted by a user equipment in a wireless mobile communication system, according to the present invention includes the step of transmitting the signal from the user equipment, wherein the signal is transmitted via an uplink frame including 15 OFDMA (orthogonal frequency division multiple access) symbols and wherein the uplink frame comprises a first uplink subframe including 9 OFDMA symbols and a second uplink subframe including 6 OFDMA symbols. Preferably, the user equipment is multiplexed with a second user equipment supporting a legacy system for the wireless mobile communication system only by FDM for an uplink.01-05-2012
20120106408METHOD AND APPARATUS FOR CODING OF HARQ-ACK TRANSMISSION IN TDD SYSTEMS WITH DOWNLINK CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured with multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system to determine the coding method for acknowledgement information bits as a function of their number, to apply bundling to the acknowledgement information bits when their number exceeds a first predetermined value, and to partition the acknowledgement information bits, possibly together with other control information bits, into two separate codewords when their total number exceeds a second predetermined value.05-03-2012
20110299439EFFICIENT LOCATION UPDATES, PAGING AND SHORT BURSTS - A mobile terminal in a wireless communication network may be one of several modes of operation. When in an idle mode, the mobile terminal may avoid a lengthy random access procedure normally associated with responding to a page from a base station, if the base station includes in the page an indication of a resource that the mobile terminal may utilize when responding to the page. Additionally, the mobile terminal may transmit an efficient location update MAC header to a base station, whether prompted to by a page from the base station or not. Furthermore, without leaving the idle mode or a sleep mode, the mobile terminal may exchange short data burst messages with a base station.12-08-2011
20110299438FRONT END MODULE WITH AN ANTENNA TUNING UNIT - A radio front end includes an antenna tuning unit, a duplexer, a balancing network, and a processing module. The antenna tuning unit is operably coupled to an antenna and operable to tune an operational characteristic of the antenna based on an antenna tuning signal. The duplexer is operably coupled to the antenna tuning unit and operable to provide electrical isolation between an outbound wireless signal and an inbound wireless signal. The balancing network is operably coupled to the duplexer and operable to establish an impedance that substantially matches an impedance of the antenna. The processing module is operable to estimate the impedance of the antenna to produce an estimated antenna impedance and to generate the antenna tuning signal based on the estimated antenna impedance.12-08-2011
20090285134Wireless access system using multiple modulation formats in TDD frames and method of operation - There is disclosed a radio frequency (RF) modem shelf for use in a fixed wireless access network comprising a plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at a plurality of subscriber premises. The radio frequency (RF) modem shelf comprises: a) a first RF modem for communicating with a plurality of the wireless access devices using TDD frames, each TDD frame having an uplink for receiving data and a downlink for transmitting data; and b) a modulation controller associated with the RF modem shelf for determining an optimum modulation configuration for each of the plurality of wireless access devices communicating with the first RF modem. The modulation controller causes the first RF modem to transmit downlink data to a first wireless access device in a first data, block having a first optimum modulation configuration and to transmit downlink data to a second wireless access device in a second data block having a different second optimum modulation configuration.11-19-2009
20110134814WIRELESS COMMUNICATION SYSTEM, ROUTER APPARATUS, WIRELESS COMMUNICATION METHOD, AND PROGRAM - A wireless communication system includes a first communication apparatus that uses first frequency band to communicate wirelessly by time division method, a second communication apparatus that uses second frequency band adjacent to the first frequency band to communicate wirelessly by time division method, and a router apparatus that relays data communicated wirelessly in the first and second communication apparatus. The router apparatus includes a first communication unit that uses the first frequency band to communicate wirelessly by time division method with the first communication apparatus, a second communication unit that uses the second frequency band to communicate wirelessly by time division method with the second communication apparatus simultaneously with wireless communication by the first communication unit, and a controller that causes transmission intervals and reception intervals in the second communication unit to coincide with transmission intervals and reception intervals that are partitioned by time divisions in the first communication unit.06-09-2011
20110134812System and Method for Scheduling Users on a Wireless Network - In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling transmission for the user devices. Scheduling transmission includes determining a first fading metric for at least one user device from the at least one user device to the base station, determining at a second fading metric for the at least one user device from the at least one user device to at least one other base station, and determining a priority metric for the at least one user device based on the first and second fading metrics. The priority metric is configured to assign a higher priority to a user device with a first fading metric indicating an up-fade and the second fading metric indicating a down-fade. The method further includes transmitting a transmission schedule to the at least one user device based the priority metric.06-09-2011
20110292848METHOD AND SYSTEM WHEREIN TIMESLOTS ALLOCATED FOR COMMON CONTROL CHANNELS MAY BE REUSED FOR USER TRAFFIC - A network apparatus for use in a wireless time division duplex (TDD) code division multiple access communication system includes a processor configured to allocate a time slot in a frame for a plurality of cells for transmission of data over a forward access channel (FACH). Each of the plurality of cells is allocated a different time slot in the frame for transmission of the data over the FACH.12-01-2011
20110292847APPARATUS AND METHOD FOR ALLOCATING CHANNEL STATE INFORMATION-REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Embodiments of the present invention relate to a wireless communication system, and more particularly, to a technology for allocating a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system.12-01-2011
20110292846METHOD AND APPARATUS FOR DETERMINING THE CONFIGURATION MODE OF SPECIAL SUBFRAME AND THE USAGE MODE OF TIME-DOMAIN RESOURCE - A method and an apparatus for determining the configuration mode of special subframe of a cell are provided, and the method includes: receiving notification messages sent from adjacent cells, and the notification messages containing the information indicating the configuration modes of special subframes of the adjacent cells; determining the configuration modes of special subframes of the adjacent cells in accordance with the notification messages; among the possible configuration modes of special subframes of the current cell, selecting preferably a configuration mode of special subframe, which meets the interference requirement of the current cell and has less interference with the adjacent cells, as the current configuration mode of special subframe. The embodiments of the present invention also provide a method and an apparatus for determining the usage mode of the time-domain resource of a cell.12-01-2011
20110292845METHOD AND EQUIPMENT FOR USER'S UPLINK DATA SCHEDULING - A method for user uplink data scheduling and an user equipment are applied in multi-period mode semi-persistent scheduling under 3GPP Long Term Evolution TDD configuration 2, the method includes setting the different offsets delta of periods for multi-period mode semi-persistent scheduling started by each uplink sub-frame in 10 ms radio frame, determining the periods of multi-period mode semi-persistent scheduling started by each uplink sub-frame in 10 ms radio frame according to the set delta, and scheduling the uplink new conveyed package data of user according to the periods of multi-period mode semi-persistent scheduling started by each uplink sub-frame in 10 ms radio frame. The method and user equipment can be used to increase the utilization ratio of resource, and are simple and easy to use.12-01-2011
20110013542METHOD AND BASE STATION FOR ALLOCATING DEDICATED RANDOM ACCESS RESOURCE - The present invention discloses a method and a base station for allocating the dedicated random access resource. In the method, first, the base station allocates the dedicated random access preamble to the user equipment (UE), and allocates the predetermined physical random access channel (PRACH) to which the dedicated random access preamble corresponds in the allocated radio frame; then, the base station transmits the signaling to the UE, wherein, the signaling includes the time domain information and the frequency domain information of the predetermined PRACH. The technical solution provided by the present invention can allocate the same dedicated random access preamble for different PRACH channels to different UEs, and can improve the utilization efficiency of the dedicated random access preamble.01-20-2011
20100128643Wireless Transmission/Reception Apparatus and Wireless Transmission/Reception Method - To a wireless transmission/reception apparatus that has a plurality of antennas, and performs antenna diversity for transmission and reception and transmits and receives a radio signal of a frame configuration containing a plurality of symbol sequences in the frequency axis direction and the time axis direction by using the time division duplex scheme and the multicarrier scheme, a reception weight calculation unit 05-27-2010
20080310329Method and Apparartus for Mitigating Psp Interference Psp-Enabled Communication Systems - A method to be performed by a network system is proposed, for P2P communication to cancel interference, comprising steps of: determining the redundant code group information, according to the code group usage information of the cell in which two UEs to establish P2P connection camp and its adjacent cells; detecting the relative position between said two UEs and each of other active UEs in communication state in the cell where said two UEs are camping and its adjacent cells; if at least one UE of said two UEs causes radio interference to at least one of said active UEs according to the relative position, further determining whether said UE and said active UE are assigned in the same time slot; selecting a scrambling code from the redundant code group information and assigning it to said two UEs if said UE and said active are assigned in the same time slot, so that said two UEs can perform scrambling operation by using said scrambling code on P2P signals transferred between said two UEs.12-18-2008
20110007673Method and Apparatus for Acquiring Resource Allocation of Control Channel - A method of acquiring a resource allocation of a control channel includes acquiring a resource region of the control channel in a second subframe based on a first resource allocation of the control channel, acquiring a resource region of a second downlink channel in the second subframe based on the resource region of the control channel, and receiving a second resource allocation of the control channel on a third downlink channel in the second subframe. The third downlink channel is indicated by the second downlink channel.01-13-2011
20090196203WIRELESS COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD - The present invention relates to a wireless communication system that performs data communication using a spatial multiplex transmission scheme. A mobile station includes a transmission weight calculating unit that calculates a transmission weight and a beam information notifying signal generating unit that transmits a known signal for generating partial space information at a base station side. A base station includes a scheduling unit (DL spatial scheduling unit (08-06-2009
20100027447Method Of Transmitting Scheduling Information In TDD System - A method of transmitting scheduling information in time-division-duplex (TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe.02-04-2010
20090225687ESTIMATION OF EIGEN COHERENCE BANDWIDTH - Closed loop MIMO FDD schemes can offer significant performance gains for OFDM based wireless communication systems over open loop MIMO schemes. However, the pre-coding weights (eigenvectors) on each of the frequency bands need to be updated and this adds extra overhead. The number of adjacent frequency fingers which can use the same pre-coding weights is governed by the coherence bandwidth of the eigen spatial modes. The receiver uses the average r.m.s. delay spread of the SISO channels as an indicator to the eigen coherence bandwidth, rather than explicitly calculating the eigen coherence bandwidth itself. This technique can be applied to TDD schemes as well, where the channel estimation is done with the reverse link, eliminating the need for feedback. The TDD transmitter can estimate the eigen coherence bandwidth on the basis of average r.m.s. delay spread, which saves computational effort.09-10-2009
20100124184METHODS AND SYSTEMS WITH FRAME STRUCTURE FOR IMPROVED ADJACENT CHANNEL CO-EXISTENCE - Methods and systems are provided for supporting co-existence of two radio access technologies (RATs), which include determining the frame structure of a first RAT, including the boundary of subframes, the DL:UL subframe ratio, and switching periodicity, selecting a frame offset and a DL:UL subframe ratio in a second RAT to minimize the number of punctured symbols in the second RAT, and transmitting frames in the second RAT with the selected frame offset and subframe ratio.05-20-2010
20090097422METHOD FOR SCHEDULING SIMULTANEOUSLY TERMINALS IN A COMMON FREQUENCY BAND, AND CORRESPONDING BASE STATION - The present invention relates to a method for scheduling simultaneously terminals belonging to two radio communication systems in a common frequency band, a base station of said first communication system having knowledge of said second radio communication system, both systems using an OFDM resource allocation mechanism on the air interface, an OFDM frame structure being predefined for said first system. According to the present invention, the method comprises the steps of: detecting in said first system the amount of resources needed for said second system for a predefined time period; determining a first part of said OFDM frame reserved for said first system and a second part of said OFDM frame reserved for said second system for said predefined time period, said first and second part of said OFDM frame being separated in the frequency domain of and taking into account the resources needed for said second system.04-16-2009
20100128642METHODS AND APPARATUS FOR SUPPORTING A HALF-DUPLEX MODE OF OPERATION FOR USER EQUIPMENT COMMUNICATIONS IN A RADIO COMMUNICATION SYSTEM - Embodiments include methods performed in time division duplex (TDD) radio communication systems in which information is communicated between a first node (e.g., a base) and a second node (e.g., user equipment) in a context of a data frame that includes a plurality of slots. The second node applies an adjustment to an alignment between a second node transmit clock and a second node receive clock based on a propagation delay between the first node and the second node. The adjusted alignment ensures that second node receive slots and second node transmit slots are non-overlapping with each other in time, and that the second node will operate in a half-duplex mode of operation. The second node transmits a transmit burst during the second node transmit slots, and receives a first node transmit burst from the first node during the second node receive slots.05-27-2010
20100118745WIRELESS COMMUNICATION APPARATUS - In a wireless communication apparatus adopting a time division duplex system for executing transmission and reception using a plurality of antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means 105 detects channel information based on reception output of reception circuits 104-1 to 104-N provided in a one-to-one correspondence with a plurality of antennas 101-1 to 101-N. Correction value detection means 110 finds a correction value for correcting deviation occurring between each of transmission circuits 103-1 to 103-N and each of the reception circuits 104-1 to 104-N based on the channel information. A wireless communication apparatus 100 transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means 110 of the wireless communication apparatus 100 detects the correction value using the correction signal (probe signal).05-13-2010
20110176461DETERMINING CONFIGURATION OF SUBFRAMES IN A RADIO COMMUNICATIONS SYSTEM - The technology disclosed provides the ability for a subframe to be configured as a “flexible” subframe. As a result, at least three different types of subframes in a TDD system may be configured: a downlink (“DL”) subframe, an uplink (“UL”) subframe, and a “flexible” subframe. The use of flexible subframes is determined based on a primary TDD configuration, and in a preferred example, on the existing primary TDD configuration in the network. If there is secondary TDD configuration, flexible subframes may be determined based on both the primary and secondary configurations, e.g., using specific rules. Also, the HARQ feedback timing for downlink (DL) transmissions may be determined based on the secondary TDD configuration. Preferred examples ensure that uplink (UL) feedback does not collide with a flexible subframe used for DL transmission. The technology preferably is compatible with legacy UEs.07-21-2011
20090310522WIRELESS SYNCHRONIZATION OF BASE STATIONS - A method and apparatus to reduce and eliminate co-channel and/or adjacent channel interference without using a dedicated timing wire connected to each base station are provided. Base stations are synchronized using a master/slave architecture where slave base stations monitor transmit signals from a master base station to acquire coordinated and synchronized base station timing.12-17-2009
20100124183ASYMMETRIC TDD IN FLEXIBLE USE SPECTRUM - A method according to an embodiment of the invention includes receiving and transmitting signals over a time division duplex (TDD) communication path. Signals are received over the TDD communication path via a first portion of a first frequency band. The first frequency band is adjacent to a second frequency band and to a third frequency band. The first frequency band is different from the second frequency band and from the third frequency band. A first frequency division duplex (FDD) communication path can be operable in the second frequency band. A second FDD communication path can be operable in the third frequency band. Signals are transmitted over the TDD communication path via a second portion of the first frequency band that is different from the first portion of the first frequency band.05-20-2010
20080247338High-Frequency Amplifier, and Transmission/Reception System - In a high-frequency amplifier for amplifying transmission and reception signals, an integrated circuit area is reduced to reduce production costs. A high-frequency amplifier (10-09-2008
20130182619Enhanced Physical Uplink Control Channel Format Resource Allocation for Time Division Duplex Mode - In one aspect thereof the exemplary embodiments provide a method that includes, when in a time division duplex mode of operation with a user equipment, allocating physical uplink control channel resources by reserving physical uplink control channel resources with a granularity of one acknowledge/negative acknowledge (ACK/NACK) bundle; and sending an indication of the allocated physical uplink control channel resources from a network access node to the user equipment.07-18-2013
20130182618METHOD AND DEVICE FOR TRANSMITTING APERIODIC SRS IN TDD SYSTEM - Disclosed are a method and a device for transmitting an aperiodic SRS in a TDD system. In the technical solution of the present invention,a symbol is defined for the transmission of the aperiodic SRS in a special subframe in the TDD system. This avoids a scenario in which the transmission position of the aperiodic SRS is undefined when a plurality of symbols that can be used to transmit the aperiodic SRS are available in an uplink pilot time slot (UpPTS). The problem of transmitting aperiodic SRS in a TDD system special subframe is thus solved. The modification to corresponding instruction messages is not extensive, and there is no overuse of system resources.07-18-2013
20110134813COMMUNICATION METHOD - Disclosed are a base station and a mobile station which communicate with each other using a frame comprising one or more downlink subframes and one or more uplink subframes. The base station transmits a data burst in a subframe corresponding to a downlink subframe index of a frame corresponding to a first frame index. The mobile station transmits a feedback for the data burst in a subframe corresponding to an uplink subframe index of a frame corresponding to a second frame index. The second frame index and the uplink subframe index are determined by a parameter value. The parameter value is determined by a difference between radio signal processing time and the number of the one or more uplink subframes.06-09-2011
20090213769Transmission of Bundled Feedback in Wireless Networks - A transmission of information between a secondary to a primary node in a wireless network occurs in a plurality of N logical time durations. Bundled feedback information for multiple DL transmissions is provided in one UL transmission. Each DL transmission is indicated by a DL grant comprising an M-bit downlink assignment indicator (DAI) field. The primary node increments the value of the M-bit DAI field in successively transmitted DL grants. The secondary node examines the value of the M-bit DAI field in received DL grants, to determine the bundled feedback information.08-27-2009
20120033589APPARATUS AND METHOD FOR CO-EXISTENCE BETWEEN DIFFERENT RADIO ACCESS TECHNOLOGIES - Apparatuses and methods are provided for co-existence between different first and second radio access technologies (RATs). The apparatus is configured or caused to perform operations, which the method may include. The operations may include selecting parameter(s) of a frame structure of the first RAT so as to facilitate its co-existence with the second RAT. These parameters may include a given length of a cyclic prefix of subframe(s) of the first frame structure, or the types of subframes of which the first frame structure is composed. The operations may additionally or alternatively include selecting, for the first RAT, the uplink and/or downlink duration(s) and/or transmit transition gap therebetween so as to satisfy a number of conditions that may define co-existence between the first and second RATs. Further, the operations may additionally or alternatively include structuring cyclic prefixes of the frame structures of the first RAT to reduce network search complexity.02-09-2012
20120033588METHOD FOR PERFORMING A HARQ OPERATION IN A RADIO COMMUNICATIONS SYSTEM, AND METHOD AND APPARATUS FOR ALLOCATION OF SUBFRAMES - There is provided a method for allocating subframes in a radio communications system that performs communication by using a radio frame including a plurality of subframes, the method including: selecting a backhaul downlink subframe in which a base station is to transmit a signal to a relay station; and allocating the backhaul downlink subframe to a substitution subframe which is not limitation subframes, when the selected backhaul downlink subframe corresponds to one of the limitation subframes, wherein the limitation subframes are subframes in which the relay station is to transmit essential information to a relay user equipment. Therefore, it is possible to overcome a limitation that is present in a link between the base station and the relay station, perform an HARQ operation, and improve the efficiency of radio resource allocation.02-09-2012
20100265853BEAMFORMING METHOD USING MULTIPLE ANTENNAS - A mobile station includes a plurality of mobile station antennas that receive at least one independent training signal from a plurality of base station antennas, and estimates a downlink channel formed by each of a plurality of base station antennas and each of the mobile station antennas by using the at least one independent training signal. The mobile station generates a beam vector by using the downlink channel, and forms transmission beams in the plurality of mobile station antennas for transmitting a signal to an uplink.10-21-2010
20130051288USER EQUIPMENT CAPABILITY SIGNALING - A user equipment (UE) configured for signaling UE capability is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE sends an indicator regarding whether the UE can support different time division duplex (TDD) configurations on different bands for a band combination. The UE also sends an indicator regarding whether the UE can support concurrent transmission and reception on different bands for the band combination. The UE additionally sends an indicator regarding whether the UE can support different uplink timing adjustments for the band combination.02-28-2013
20090052356METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK INFORMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM BASED ON TIME DIVISION DUPLEXING - A method is provided for transmitting control information by a Base Station (BS) in a Time Division Duplexing (TDD)-based Orthogonal Frequency Division Multiple Access (OFDMA) system. The method includes determining a TDD ratio value; when a value obtained by dividing a number of consecutive Forward-Link (FL) time slots of a predetermined time interval by a number of consecutive Reverse-Link (RL) time slots is not a positive integer, grouping Mobile Stations (MSs) into multiple groups and generating group index information; and transmitting, to the MSs, control information including the TDD ratio value and the group index information.02-26-2009
20090279457SYNCHRONIZATION BETWEEN UNCOORDINATED TIME DIVISION DUPLEX COMMUNICATION NETWORKS - An apparatus and method for synchronization between uncoordinated Time Division Duplex (TDD) communication networks includes a first step (11-12-2009
20100080152METHOD AND APPARATUS FOR PROVIDING SIGNALING OF REDUNDANCY VERSIONS - An approach is provided for efficient signaling of redundancy version information. A redundancy version signaling module detects the start of a system information radio transmission window and assigns a redundancy version sequence at the start of the transmission window.04-01-2010
20110267996SYSTEM INFORMATION TRANSMISSION METHOD - A system information transmission method in a communication system includes that: a base station configures system information which includes resource mapping information; the base station transmits the resource mapping information through a broadcast control channel. By means of configuring and transmitting the system information, a terminal is able to obtain the resource configuration, mapping and/or allocation conditions of the base station.11-03-2011
20110267997SIGNAL TRANSMISSION METHOD USING MBSFN SUBFRAME IN RADIO COMMUNICATION SYSTEM - A signal transmission method using a multicast broadcast single frequency network (MBSFN) subframe in a radio communication system is provided. The method includes: selecting a plurality of relay stations for transmitting a plurality of backhaul signals, and transmitting the plurality of backhaul signals to the selected respective relay stations by using different radio resources, wherein each of the selected relay stations configures a subframe for receiving each of the plurality of backhaul signals as the MBSFN subframe. Accordingly, the backhaul signal can be transmitted between the base station and the plurality of relay stations by effectively using the radio resources.11-03-2011
20120106407GENERATION OF HARQ-ACK INFORMATION AND POWER CONTROL OF HARQ-ACK SIGNALS IN TDD SYSTEMS WITH DOWNLINK OF CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured to have multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system so as to determine a power of an acknowledgement signal that the UE transmits in a control channel and to determine a number of acknowledgement information bits that the UE multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on DL Assignment Index (DAI) Information Elements (IEs) in DL Scheduling Assignments (SAs) that the UE detects through multiple transmission time intervals and through the multiple configured DL cells. The number of acknowledgement information bits in the data channel is determined based on a DAI IE of an UpLink (UL) SA associated with the transmission of the data channel.05-03-2012
20120106406Time division duplexing (TDD) style-based data transmission method and apparatus - The present disclosure discloses a method for transmitting data based on a Time Division Duplexing (TDD) standard, the method includes: setting a control parameter for analyzing and processing IP packet; receiving the IP packet from an IP layer and storing the IP packet into a receiving buffer according to the control parameter; scanning the IP packet in the receiving buffer, analyzing packet header information of the IP packet, adjusting a sending order of the IP packet according to the control parameter and sending the IP packet to a sending buffer according to the sending order; and sending the IP packet in the sending buffer to a Packet Data Convergence Protocol (PDCP) entity according to the sending order. The present disclosure further discloses a method for transmitting data based on a TDD standard. Through the device and method of the present disclosure, the utilization rate of an air interface and the speed of acquiring data from a network side by a subscriber are increased and the time of the subscriber is saved; and moreover, the network capacity is increased without the investment of hardware so as to reduce the operating cost.05-03-2012
20110199944APERIODIC SOUNDING REFERENCE SIGNAL TRANSMISSION METHOD AND APPARATUS - A method and apparatus for facilitating an aperiodic transmission of a sounding reference signal (SRS) are disclosed. Transmission resources are allocated to the aperiodic SRS transmission. A portion of a first downlink control message is modified to produce a second downlink control message, where the first downlink control message does not trigger an aperiodic SRS transmission. The second downlink message is transmitted.08-18-2011
20110170460APPARATUS AND SYSTEM FOR USING RELAY STATION IN A TDD WIRELESS NETWORK - A Relay Station (RS) is provided. The RS is adapted to operate in a TDD type of wireless communication network which comprises at least one base station (BS) operative to communicate with the RS and with an IP network, and a plurality of Mobile Subscribers (MSs). The RS comprises: a subscriber terminal operative in conformity with IEEE 802.16e Standard; and a BS operative in conformity with said IEEE 802.16e Standard, and wherein that subscriber terminal and that BS that belong to the RS are connected to each other, and wherein all communications transmitted from the at least one BS to the RS are in conformity with the IEEE 802.16e Standard.07-14-2011
20110170459DISTINGUISHING BETWEEN DATA PACKETS SENT OVER THE SAME SET OF CHANNELS - Embodiments of the present invention distinguish a first type of data packet transmitted over a random access communication channel of a wireless cellular communications system from a second type of data packet transmitted over the same random access communication channel, allowing the first and second data packet data packet types to share a common set of random access channels through the use of different types of channel coding. This reduces data packet collision probability by eliminating the need to segregate the set of random access channels according to data packet type. Backward compatibility with legacy base stations that handle only the first data packet type is maintained in that no changes to the first data packet type are needed.07-14-2011
20090262670APPARATUS AND METHOD FOR ADAPTIVELY CHANGING UPLINK POWER CONTROL SCHEME ACCORDING TO MOBILE STATUS IN A TDD MOBILE COMMUNICATION SYSTEM - An apparatus and method for changing an uplink power control scheme according to mobile status in a TDD mobile communication system are provided. The communication system comprises a Subscriber Station (SS) for transmitting a power control change request message to a Base Station (BS) to change the power control scheme, and the BS for deciding to change the power control scheme between the open loop power control and closed loop power control, and transmitting a power control change response message the SS including the decided power control scheme.10-22-2009
20090109881VOICE AND DATA EXCHANGE OVER A PACKET BASED NETWORK - A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.04-30-2009
20090274074Method for Channel Quality Measures in a Multiple Antenna System - The invention relates to a laminate structure comprising a first active layer having a first electrode potential, a second active layer having a second electrode potential, wherein the second electrode potential being different from the first electrode potential and wherein the first and second active layers are arranged at a distance from each other, and wherein the laminate further comprises a third layer of an electrically weakable adhesive at least partly bridging said distance between the first and second layers.11-05-2009
20090274076Sounding Reference Signal User Equipment Specific Sub-Frame Configuration - A method of wireless communication including a plurality of fixed basestations and a plurality of mobile user equipment with each basestation transmitting to any user equipment within a corresponding cell a sounding reference signal sub-frame configuration indicating sub-frames when sounding is permitted. Each user equipment recognizes the sounding reference signal sub-frame configuration and sounds only at permitted sub-frames. Differing user equipment may have differing sounding reference signal sub-frame configurations. There are numerous manners to encode the transmitted information.11-05-2009
20090274077METHOD AND APPARATUS FOR DOWNLINK DATA ARRIVAL - A method is provided to generate messages for wireless communications. The method includes encapsulating a first message protocol within the framework of a second message protocol and generating a message from the first message protocol and the second message protocol. The method transmits the first message protocol to an allocation space designated for the second message protocol.11-05-2009
20090274073TRANSMIT EMISSION CONTROL IN A WIRELESS TRANSCEIVER - Methods and apparatus for control of uplink resource allocation and undesirable transmit emissions from a wireless transceiver in a frequency division duplex (FDD) or hybrid frequency division duplex (H-FDD) wireless system. The bandwidths spanned by the receive band and the transmit band may be symmetric or asymmetric. Additionally, each of the receive band or the transmit band may be contiguous or may be an aggregate of multiple discontinuous frequency bands. The wireless transceiver can control undesirable transmit emissions from occurring in a predetermined frequency band by using an offset LO frequency and restricting transmit signals to frequencies away from the predetermined frequency band. Alternatively, in an asymmetric FDD system where a receive band is larger than a transmit band, the transceiver can limit transmit signal allocation to the transmit band. The transceiver can further limit out of band transmit emissions using an offset LO frequency.11-05-2009
20090290517CALIBRATING RADIOFREQUENCY PATHS OF A PHASED-ARRAY ANTENNA - The present invention provides a method of calibrating base station comprising a plurality of antennas and operating in an Orthogonal Frequency Division Multiplex (OFDM) and Time Division Duplex (TDD) mode. One embodiment of the method includes a method of calibrating a base station comprising a plurality of antennas for beamsteering forward link traffic data to a target mobile in a TDD wireless communication system. Each antenna is connected to a corresponding radio via a transmit/receive switch that is configured to switch between a receive path and a transmit path. The method includes transmitting a first signal from a first radio via a first cross-over cable coupled to the first radio and a second radio such that the first signal is received by the second radio. The method also includes transmitting a second signal from the second radio via a second cross-over cable coupled between the first and second radios such that the second signal is received by the first radio. The method further includes determining, based on at least one of the first or second signals, a relative weight that can be applied to traffic signals transmitted from the second radio.11-26-2009
20110170462Method for Determining Random Access Channel Number and Sending Sounding Reference Signal - The present invention provides a method for determining the number of random access channels which is applied to a time division duplex system. The method comprises: a terminal determining configuration parameters related to the number of the random access channels in an UpPTS based on system configuration, said configuration parameters including the number of downlink-to-uplink switch-points in one radio frame N07-14-2011
20090103460METHOD FOR TRANSMITTING SIGNAL AND METHOD FOR RECEIVING SIGNAL - A method for transmitting a signal according to the present invention comprises spreading a control channel data through a PN code and generating a diffused control channel data; time division multiplexing the diffused control channel data and a service channel data and generating a multiplexed signal; and inverse Fourier transforming the multiplexed signal and generating an inverse Fourier transformed signal.04-23-2009
20120294204METHOD AND APPARATUS FOR IMPROVING ACKNOWLEDGEMENT/NEGATIVE ACKNOWLEDGEMENT FEEDBACK - A method, apparatus, and computer program product for wireless communication are provided to receive a downlink grant including a transmission power control (TPC) command and a downlink assignment index (DAI) for an uplink subframe, determine that a value for at least one of the TPC commands is an ACK/NACK resource indicator for an uplink control channel resource based on a value of the DAI, and transmit one or more ACK/NACK bits using the uplink control channel resource. In another example, an eNB may be equipped to transmit a downlink grant including TPC command and DAI for an uplink subframe, wherein the DAI is greater than 1 and the TPC command is replaced with an ACK/NACK resource indicator, and receive a signal including uplink control channel information, where ACK/NACK feedback for one or more downlink subframes associated with the uplink subframe are included in a resource indicated by the resource indicator.11-22-2012
20090034438METHOD FOR ESTABLISHING A PARAMETERIZED WIRELESS COMMUNICATION CHANNEL - A method for establishing a parameterized wireless communication channel comprises the steps of communicating physical profile data between a first communication (02-05-2009
20100128644Wireless Communication Device - A wireless communication device performing wireless communication by switching between transmission timing and reception timing in time division, controls to supply a heater or a fan with power supplied from a power supply unit in the reception timing period, and controls to suspend supplying the heater or the fan with the power supplied from the power supply unit in the transmission timing period, in case that a temperature detected by a temperature detector is outside a specified temperature range while a time-division switchover between the transmission timing and the reception timing is performed.05-27-2010
20120294209System and Method for Peer-to-Peer Communication in Cellular Systems - Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.11-22-2012
20120287828ACKNOWLEDGEMENT / NEGATIVE ACKNOWLEDGEMENT FEEDBACK FOR TDD - Bits for acknowledgement (ACK) and/or negative acknowledgement (NAK) may be allocated based on whether a special subframe configuration in a TDD configuration permits downlink transmission. For carrier aggregation, ACK/NAK bits may be allocated only to special subframes in component carriers (CCs) which permit downlink transmission. Also, for example, ACK/NAK bits may be allocated to all CC special subframes if a single CC is configured to allow downlink transmission on one of its special subframes. ACK/NAK bits may also be allocated to all special subframes.11-15-2012
20080279124OFDM WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION APPARATUS - In a wireless communication system wherein at least two communication units employ the TDD wireless communication method based on OFDMA, an OFDM wireless communication method and a wireless communication apparatus are disclosed. The first communication unit transmits a pilot signal over the whole subband zone configured of divisions of a predetermined system band. The second communication unit having a plurality of antennas estimates a propagation path of the subchannels constituting continuous frequency blocks making up a subband from the pilot signal received. The second communication unit determines the array weight used at the time of signal transmission to the first communication unit using the estimation result.11-13-2008
20080279123Time division duplex wireless network and associated method using connection modulation groups - A wireless network is provided that includes a base station and subscriber stations that communicate with the base station using radio frequency (RF) time division duplex (TDD) signaling. The base station may establish medium access control (MAC) connections with each station. The base station monitors communications with the stations and, in accordance, assigns stations or MAC connections to modulation groups. The base station transmits signals on MAC connections or to stations in a modulation group in adjacent TDD slots within a TDD frame. The base station may receive access requests from the stations, evaluate traffic requirements for the stations, and determine a longest downlink portion for the stations. The base station then allocates downlink and uplink portions of a TDD frame according to the length of the longest downlink portion.11-13-2008
20110267994Method, System, and Apparatus for Determining Uplink Transmission Power in Time Division Duplex System - A method for determining uplink transmission power in time division duplex system is disclosed: a base station determines the current distribution manner of uplink and downlink sub-frames, acquires the frame correspondence information that corresponds to the distribution manner of said uplink and downlink sub-frames, selects, based on said frame correspondence information, downlink sub-frames to transmit to a terminal the power control (TPC) commands that correspond to the uplink sub-frames. Before using the uplink sub-frames to transmit data, the terminal determines the current distribution manner of uplink and downlink sub-frames, acquires the frame correspondence information that corresponds to the distribution manner of said uplink and downlink sub-frames, determines, based on the frame correspondence information, the downlink sub-frames that are used for transmitting the TPC commands; acquires the TPC commands received by the downlink sub-frames, and determines the data transmission power of the uplink sub-frames based on said TPC commands. The present invention also discloses a time division duplex data transmission system and an apparatus therefor. With the present invention, a time division duplex system can transmit and receive TPC commands based on the frame correspondence information, thereby enabling correct and effective uplink power control performance.11-03-2011
20080285489REDUNDANT RADIO FREQUENCY NETWORK HAVING A ROAMING TERMINAL COMMUNICATION PROTOCOL - Disclosed herein is a redundant network and communication protocol at least including host computers, RF base stations, and roaming terminals. The network may utilize a polling communication protocol such that under heavy traffic conditions, a roaming terminal wishing to initiate communication may be required to wait for at least a predetermined period and determine whether the channel is available for communication. When a hidden terminal is communicating, the roaming terminal may conclude that the communication is taking place upon receiving a polling frame directed to the hidden terminal from the normally silent base station. Inherent redundancy techniques may be used with a spanning tree approach for determining the most efficient pathways from a source to a destination and ensuring that the network adapts to spatial changes or breakdowns within the network.11-20-2008
20120294206DYNAMIC ADJUSTMENT OF DOWNLINK/UPLINK ALLOCATION RATIO IN TDD WIRELESS SYSTEMS - Techniques, apparatuses, and systems for dynamically changing downlink and uplink allocations can include operating a base station under time division duplexing to communicate with one or more mobile devices using a frame structure, adjusting a downlink-uplink ratio to change an allocation between uplink and downlink data capacities in the frame structure, determining a mute interval based on the adjusted downlink-uplink ratio, generating mute information based on the mute interval to identify the one or more areas of the frame structure effected by the allocation change, and transmitting the mute information to the one or more mobile devices.11-22-2012
20120294210METHOD AND DEVICE FOR SCHEDULING DOWNLINK SUBFRAMES - A method and device for scheduling downlink subframes are disclosed in the embodiments of the present invention, in which a control section of one subframe schedules data sections of one or more other subframes, making it possible to greatly save an overhead of control signaling to thereby have more resources for transmission of data and improve the performance of a system as compared with traditional scheduling of a single subframe.11-22-2012
20120294208On-Package Transmit/Receive Switch and Antenna - Methods and systems for an on-chip and/or on-package T/R switch and antenna are disclosed and may include selectively coupling one or more low noise amplifiers (LNAs) and/or one or more power amplifiers (PAs) to one or more ports of a multi-port distributed antenna utilizing configurable transmit/receive (T/R) switches integrated on a chip with the LNAs and PAs. The LNAs and PAs may be impedance matched to the antenna by coupling them to a port based on a characteristic impedance at the port. The T/R switches may be integrated on a package to which the chip may be coupled. The signals transmitted and received by the antenna may be time division duplexed. The antenna, which may include a microstrip antenna, may be integrated on the chip or the package. The LNA and the PA may be coupled to different ports on the antenna via the T/R switches.11-22-2012
20080285488MIMO WLAN SYSTEM - A multiple-access MIMO WLAN system that employs MIMO, OFDM, and TDD. The system (1) uses a channel structure with a number of configurable transport channels, (2) supports multiple rates and transmission modes, which are configurable based on channel conditions and user terminal capabilities, (3) employs a pilot structure with several types of pilot (e.g., beacon, MIMO, steered reference, and carrier pilots) for different functions, (4) implements rate, timing, and power control loops for proper system operation, and (5) employs random access for system access by the user terminals, fast acknowledgment, and quick resource assignments. Calibration may be performed to account for differences in the frequency responses of transmit/receive chains at the access point and user terminals. The spatial processing may then be simplified by taking advantage of the reciprocal nature of the downlink and uplink and the calibration.11-20-2008
20110205941SYSTEM AND METHOD FOR SPECTRUM SHARING AMONG PLURAL WIRELESS RADIO NETWORKS - Spectrum that overlaps in time, geography and frequency is allocated to more than one radio network. The networks share the spectrum by employing spectrum sharing in accordance with spectrum sharing control data to avoid collisions between the transmissions of the networks.08-25-2011
20080291851Subchannel allocation apparatus - Subchannel allocation apparatus for allocating subchannels of a MIMO radio channel to a plurality of users, the MIMO radio channel having a first number of subchannels, each subchannel having a transmission capacity. The subchannel allocation apparatus includes a subspace determiner for determining a subspace of the MIMO radio channel, the subspace having a second number of subchannels, the second number being lower than the first number and each subchannel of the second number of subchannels having a higher transmission capacity than the subchannel with the lowest transmission capacity of the first number of subchannels. The subchannel allocation apparatus further includes a subchannel allocator responsive to the subspace determiner for allocating a subchannel from the second number of subchannels of the subspace to a user based on an allocation metric.11-27-2008
20120294207METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets.11-22-2012
20120294205Systems and Methods for Processing Time-Division Signals and Frequency-Division Signals - System and methods are provided for processing time-division signals and frequency-division signals using a multi-mode transceiver. The example system includes a power amplifier, a switching component, and a duplexer. The power amplifier is configured to receive a first time-division signal from the transceiver and to generate an amplified time-division signal based on the first time-division signal if the transceiver is in a time-division mode. The power amplifier is further configured to receive a first frequency-division signal from the transceiver and to generate an amplified frequency-division signal based on the first frequency-division signal if the transceiver is in a frequency-division mode. The switching component is configured to receive the amplified time-division signal from the power amplifier, and to output the amplified time-division signal for transmission. The duplexer configured to receive the amplified frequency-division signal from the switching component, and to output a transmission signal for transmission.11-22-2012
20110007672COMMUNICATION METHOD AND APPARATUS IN WIRELESS BODY AREA NETWORK - Short range wireless communication is provided. A first node included in a Wireless Body Area Network (WBAN) communicates with at least one neighboring second node. The first node transmits or receives data to or from at least one device node connected to the first node during a time division communication period, using a super-frame in which the time division communication period, a time division schedule advertisement message transmission period, and a Contention Access Period (CAP) are sequentially arranged. The first node broadcasts a time division schedule advertisement message of the first node to the at least one second node during the time division schedule advertisement message transmission period within the super-frame. Upon receiving a time division schedule advertisement message from the second node during the CAP within the super-frame, the first node adjusts a data transmission or reception time for the at least one device node connected to the first node using the received time division schedule advertisement message.01-13-2011
20090190509APPARATUS AND METHOD FOR TRANSMIT/RECEIVE ANTENNA SWITCH IN A TDD WIRELESS COMMUNICATION SYSTEM - An apparatus and method in a Time Division Duplex (TDD) wireless communication system are provided. The apparatus includes two 90° hybrid couplers and a phase converter block. The two 90° hybrid couplers each separate a signal into two signals and output the two signals, and each couple two signals and output the coupled signal. The phase converter block connects between the two 90° hybrid couplers. In a transmission mode, the phase converter block identically varies phases of two signals and outputs the varied two signals to the second 90° hybrid coupler. In a reception mode, the phase converter block varies phases of two signals and outputs the varied two signals to the first 90° hybrid coupler.07-30-2009
20110267995Apparatus and method for transmitting ACK/NACK in TDD system - The present invention provides a method and apparatus for transmitting an ACK/NACK in a TDD system. A component carrier (CC) configuration for a user equipment (UE) and a transmission mode of each CC are received. An ACK/NACK feedback mode is selected based on an overhead status for feedback in an uplink. An ACK/NACK is processed according to the selected feedback mode. And the ACK/NACK is transmitted in the uplink. The method provided by the present invention can avoid excessive overhead for feedback in uplink in various extreme circumstances while ensuring satisfying performances of downlinks under many configurations.11-03-2011
20090185511METHOD FOR CONCURRENTLY TRANSMITTING AND RECEIVING DATA THROUGH HETEROGENEOUS COMMUNICATION NETWORKS AND APPARATUS USING THE SAME - A method for transmitting/receiving data in an orthogonal frequency division multiple access-time division duplex (OFDMA-TDD) scheme. A first uplink signal and a first downlink signal of a specific band are periodically transmitted/received within a time-divided section. A second uplink signal and a second downlink signal are periodically transmitted/received, and the second signal is of a band other than the specific band, within the time-divided section, wherein, during a time section in which the first downlink signal is transmitted, the second uplink signal is received.07-23-2009
20090129298EFFICIENT SYSTEM IDENTIFICATION SCHEMES FOR COMMUNICATION SYSTEMS - Systems and methodologies are described that facilitate efficiently indicating parameter(s) associated with a base station utilizing synchronization signals in a wireless communication environment. For instance, relative locations of a PSC and a SSC in a radio frame can be a function of a parameter. Further, a PSC sequence utilized to generate PSCs can be selected based upon a parameter. Moreover, inclusion or exclusion of PSCs from a radio frame can be a function of a parameter. Additionally or alternatively, pseudo random sequence mappings (e.g., to cell IDs, tone locations) can be a function of a parameter. Example parameters can be whether the base station is part of a TDD or a FDD system, whether the radio frame employs FS05-21-2009
20120069780Node in a Wireless Communication System With Different Antenna Diversity Methods For Uplink and Downlink - The present invention relates to anode (03-22-2012
20090052357METHOD FOR REALIZING FREQUENCY DOMAIN SCHEDULING IN THE TIME DIVISION DUPLEX SYSTEM AND THE SYSTEM THEREOF - A method and system for achieving frequency domain scheduling in a time division duplex system is disclosed, the method comprising: a first device transmits a non pre-coded reference symbol to a second device; from the reference symbol, the second device obtains a channel impulse response matrix experienced by the reference symbol transmitted from the first device, and according to the channel impulse response matrix, obtains linear spatial domain pre-coding matrix of candidate physical resource blocks used in transmitting data to the first device; from the channel impulse response matrix and the linear spatial domain pre-coding matrix, the second device obtains the channel quality indication of the candidate physical resource blocks; and performs the frequency domain scheduling according to the channel quality indication. The use of the method not only solves the problem in the prior art that the frequency domain scheduling is unable to be performed when a channel sounding method is employed, but also the contradiction in the use of the frequency domain scheduling and the linear spatial domain pre-coding. A communication system is also disclosed.02-26-2009
20090052355METHOD AND SYSTEM FOR TRANSMITTING RESOURCE ALLOCATION INFORMATION IN COMMUNICATION SYSTEM - A system and method for transmitting resource allocation information by a base station in a communication system is provided. The method includes generating first MAP messages for user terminals, each of which includes an identifier of a corresponding user terminal and corresponds to resource allocation information on a first band, in an order of user terminals, generating a second MAP message, which corresponds to resource allocation information for a user terminal allocated resources of only a second band, and generating third MAP messages, which correspond to resource allocation information on the second band, for user terminals allocated resources of both the first band and the second band, among the user terminals, in the order of user terminals allocated resources of both the first band and the second band, transmitting the first MAP message through the first band, and transmitting the second and third MAP messages through the second band.02-26-2009
20090052353SYSTEM AND METHOD FOR TRANSMISSION TIMESLOT ASSIGNMENT IN WIRELESS TIME DIVISION DUPLEX SYSTEMS - A method and apparatus is provided for assigning transmission slots in a time division duplex system. A time frame overlap determination processor (02-26-2009
20090219839TDD frame format in wireless mesh network - In a wireless mesh network a method includes, at a first node, receiving a transmission from a second node during a first sub-frame of a frame with a first transceiver operating with a first center frequency; processing the received transmission; and transmitting, after a predetermined fixed interval, with a second transceiver operating with a second center frequency the processed received transmission to a third node during a second sub-frame of a subsequent frame or of the same frame. Also disclosed are computer programs to execute the method, as well as apparatus constructed to implement the method.09-03-2009
20090052354TIME-SPACE BLOCK PRECODING METHOD IN MULTI-USER DOWN LINK - There is provided a down link multi-user time-space code precoding method including: a step (S02-26-2009
20130121216METHOD AND APPARATUS FOR SOFT BUFFER MANAGEMENT FOR HARQ OPERATION - Certain aspects of the present disclosure propose a method and an apparatus for calculating maximum number of hybrid automatic repeat request (HARQ) processes per component carrier and/or number of soft buffer bits for HARQ operation by taking into account the subframes which are available for a physical downlink shared channel (PDSCH) for a user equipment (UE) or a group of UEs. In the proposed method, the subframes that are not available for a PDSCH for at least a UE (either by specification or by configuration) may not be considered in calculating the number of soft buffer bits.05-16-2013
20130121217MULTI-MODE SPLIT BAND DUPLEXER ARCHITECTURE - The present disclosure relates to a split-band duplexer architecture that takes advantage of a relationship between a frequency division duplex (FDD) transmit band, an FDD receive band, and a time division duplex (TDD) band, which has frequencies located between FDD transmit band frequencies and FDD receive band frequencies. As such, by splitting the FDD receive and transmit bands into two sub-bands, two separate sub-band duplexers may be used to fully support the FDD receive and transmit bands. Further, a passband of one of the sub-band duplexers may be widened to support the TDD band while transmitting, and a passband of the other of the sub-band duplexers may be widened to support the TDD band while receiving. By using sub-band duplexers, isolation margins and insertion loss margins may be increased, which may allow use of standard filter components, such as surface acoustic wave (SAW) filters.05-16-2013
20090097423APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING RESOURCE ALLOCATION INFORMATION IN A COMMUNICATION SYSTEM - An apparatus and method for transmitting/receiving resource allocation information in a communication system are provided. In the method of transmitting resource allocation information, at least one of a plurality of FDD UL FA resources is divided into a plurality of segment regions, and first resource allocation information is transmitted to mobile stations through a plurality of TDD DL FA resources. The first resource allocation information indicates, among the plurality of segment regions, each of segment regions corresponding to the TDD down link FA resources.04-16-2009
20130215804Base Station Subsystem, a RBS Part and a TMA Part and Methods Thereof for Synchronizing the RBS Part and the TMA Part - A base station subsystem (08-22-2013
20130215803METHOD AND DEVICE FOR TRANSMITTING/RECEIVING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates a method for a terminal to transmit acknowledgement information including determining a physical uplink control channel (PUCCH) format and resource, in which acknowledgement information is transmitted in response to a downlink transmission in a downlink sub-frame set including M (M≧1) downlink sub-frame; and transmitting the acknowledgement information using the PUCCH format and resource in one uplink sub-frame. Here, one or more serving cells including one PCell and at least one SCell are configured to the terminal. In the determining step, the acknowledgement information may be transmitted using a PUCCH format 1a/1b, when a semi-persistent scheduling release physical downlink control channel (PDCCH) does not exist in the downlink sub-frame set, and one physical downlink shared channel, which is indicated through the detection of a corresponding PDCCH having a downlink assignment index value of one, exists in the downlink sub-frame set.08-22-2013
20090207760METHODS AND DEVICES FOR DETERMINING IF A BASE STATION CAN NOT HANDLE A TERMINAL - The present invention concerns a method for determining, in a wireless cellular telecommunication network, if a base station can not handle a half-duplex terminal, the base station transferring signals in a cell of the base station, the half-duplex terminal, when being handled by the base station, not transferring and not receiving signals during a period of time, called idle period of the cell of the base station. The base station: 08-20-2009
20110228712UPLINK RESOURCE ALLOCATION TO CONTROL INTERCELL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - Embodiments of the present invention exploit the reciprocity of radio channels in TDD, and longer-term correlation between average uplink and downlink path losses in FDD wireless communication systems to enable distributed schedulers in an enhanced uplink system to allocate uplink transmission resources while preemptively managing intercell interference levels. Each cell's base station transmits a downlink reference signal at a known transmission power level. A mobile station monitors the received signal strength of the downlink reference signals from multiple base stations. The transmitted and received signal strength levels can be used by the mobile station to estimate the amount of intercell interference that the mobile station's uplink transmissions cause, and the mobile station's uplink transmission parameters are adjusted accordingly. In further embodiments, the received reference signal power levels, or values derived therefrom, are transmitted by the mobile station to its serving base station, where a scheduling algorithm uses the information to adjust one or more transmission parameters relating to a grant of uplink transmission resources to the UE, thereby controlling the intercell interference generated by the mobile station's uplink transmissions.09-22-2011
20110228711METHOD OF AND APPARATUSES FOR RECOGNIZING AN OUT-OF-SYNC BASE STATION - A method of and a network controller (09-22-2011
20080259826System for coordination of communication within and between cells in a wireless access system and method of operation - Apparatus, and an associated method, for providing WLAN (wireless local area network) service through a fixed wireless access communication system. WLAN transceivers are fixed in position at subscriber stations of the fixed wireless access communication system. Each WLAN transceiver defines a coverage area. Through appropriate positioning of the WLAN transceivers at the subscriber stations, overlapping coverage areas are formable and between which handovers of communications with a mobile station are effectuated when a mobile station travels out of one coverage area and into another coverage area.10-23-2008
20090257366FRAME STRUCTURE FOR A WIRELESS COMMUNICATION SYSTEM - A frame format used in a wireless communication system, more particularly an OFDMA TDD wireless communication system, of the kind comprising a base station and a plurality of fixed or mobile subscriber stations, the base station maintaining connections with each of the subscriber stations by performing wireless communication in units of frames having said frame format, and within each frame, allocating resources for data transmission and signalling.10-15-2009
20090316608SYSTEM AND METHOD FOR CONFIGURABLE TIME-DIVISION DUPLEX INTERFACE - A communication system comprises a first unit; and a second unit communicatively coupled to the first unit. The first unit is operable to receive a first original radio frequency signal via a first interface and the second unit is operable to receive a second original radio frequency signal via a second interface. The second unit is operable to output a first reproduced radio frequency signal via the second interface, the first reproduced radio frequency signal being derived from the first original radio frequency signal. The first unit is operable to output a second reproduced radio frequency signal via one of the first interface and a third interface, the second reproduced radio frequency signal being derived from the second original radio frequency signal. The first interface is operable as a simplex interface when the second reproduced radio frequency signal is output via the third interface and as a duplex interface when the second reproduced radio frequency signal is output via the first interface.12-24-2009
20100150035Method for Signaling Center Frequencies for WiMAX Repeaters - A wireless network includes a base station (BS), a set of mobile stations (MS), and a set of repeaters. The channels between the BS and the repeater and between the repeater and the MS include a downlink (DL) and an uplink (UL). A BS specifies a first center frequency F06-17-2010
20110228710INTERFERENCE CANCELLATION IN A SPREAD SPECTRUM COMMUNICATION SYSTEM - A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code and are received over the shared spectrum. The received signals are sampled and the samples are delayed to produce a window. A weighted value for each despread pilot code window sample is determined using an adaptive algorithm. Each window sample is despread with a traffic code. Each despread traffic code window sample is weighted according to a weight corresponding to its respective pilot code sample.09-22-2011
20120195238METHOD AND APPARATUS FOR OBTAINING INFORMATION FROM TARGET BASE STATION - A method and an apparatus for obtaining information from a target base station are disclosed. The method includes: when a source base station needs to obtain information from a target base station, receiving, through an air interface, a system message in a certain format broadcast by the target base station; and parsing the system message, and obtaining required information. Through the present invention, an LTE base station can communicate with another LTE base station or with a heterogeneous base station directly through an air interface, thereby increasing the efficiency of communication between base stations.08-02-2012
20120140683METHOD OF EXPLOITATION OF CO-CHANNEL INTERFERENCE, APPARATUS AND COMPUTER PROGRAM - A method of canceling co-channel interference of a signal received by a mobile station having at least two receiving antennas, in a cellular OFDMA-TDD communication network having a serving base station and at least one interfering base station. The signal is a result of a serving signal transmitted by the serving base station which is distorted by at least one interfering signal transmitted by the interfering base station. The serving signal is transmitted with a first modulation scheme and the interfering signal is transmitted with a second modulation scheme. The method includes: a channel estimation phase delivering channel estimations of the serving signal and the interfering signal; and a MIMO detecting phase, detecting symbols by using the channel estimations of the serving signal and the interfering signal. The MIMO detection phase is realized using a non-linear method which uses the first modulation scheme and the second modulation scheme.06-07-2012
20100177669Transmission Method and Apparatus for Uplink Control Signaling in Time Division OFDMA System - A method and an apparatus for an uplink control signaling transmission in a time division duplex OFDMA system are provided for the long term evolution time division duplex (LTE TDD). A signaling processing unit reserves frequency resource for an uplink control channel according to the total amount of the uplink control signaling, and the reserved frequency resource are assigned on both sides of the frequency domain used by uplink time slots, so that the uplink control signaling of a terminal UE is transmitted on the position and the bandwidth of the reserved frequency resource. The transmitted uplink control signaling is transmitted on respective reserved uplink control sub-channels by an intra-subframe hopping way, each terminal UE or a group of UEs corresponding to a frequency-hop sequence. The present invention is simple to realizes and capable of utilizing resource repeatedly and utilizing the time domain and frequency domain diversity simultaneously.07-15-2010
20090316609SYSTEM AND METHOD FOR SYNCHRONIZED TIME-DIVISION DUPLEX SIGNAL SWITCHING - A system comprises a first unit and a second unit communicatively coupled to the first unit. The first unit is operable to receive a first original radio frequency signal and the second unit is operable to receive a second original radio frequency signal. The first and second original radio frequency signals are originally transmitted on a radio frequency channel using time division duplexing. The first unit communicates a control signal to the second unit, the first unit generating the control signal based at least in part on detecting when the first original radio frequency signal is being received at the first unit. The second unit uses the control signal to determine when to output a first reproduced radio frequency signal in accordance with the time division duplexing used to originally transmit the first and second original radio frequency signals on the radio frequency channel. The first reproduced radio frequency signal is derived from the first original radio frequency signal.12-24-2009
20100226292MULTI-CHANNEL RADIO FREQUENCY FRONT END CIRCUIT WITH FULL RECEIVE DIVERSITY FOR MULTI-PATH MITIGATION - A front end circuit for coupling a plurality of antennas to a multi-channel time domain duplex RF transceiver is disclosed. The front end circuit has a first transmit port, a first receive chain primary port, a first receive chain secondary ports, and a first antenna port connectible to a first one of the plurality of antennas. The front end circuit also has a second transmit port, a second receive chain primary port, and a second receive chain secondary port connectible to a second one of the plurality of antennas. A first switch has terminals connected to the first transmit port, the first receive chain primary port, and the second receive chain secondary port, as well as a common terminal that is connected to the first antenna port. Additionally, the front end circuit has a second switch that has terminals connected to the second transmit port, the second receive chain primary port and the first receive chain secondary port, and a common terminal connected to the second antenna port.09-09-2010
20130215801TIME VARYING CHANNELS HAVING PILOTS - A wireless communication unit for recovering transmit data comprises a receiver for receiving a signal comprising a data payload and at least two pilots, wherein at least a first pilot type of the at least two pilots is different to a second pilot type of the at least two pilots. The wireless communication unit further comprises a processor arranged to: extract at least one pilot of the first pilot type from the received signal; and recover the data payload from the received signal using the extracted at least one pilot of the first pilot type.08-22-2013
20100238846WIRELESS COMMUNICATION SYSTEM BASED ON CODE SPREADING-ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS AND SMART ANTENNA - A time division duplex wireless communication system based on Code Spreading-Orthogonal Frequency Division Multiple Access (CS-OFDMA) and a smart antenna includes: an antenna array and multichannel transceiver, a space processor, a demodulator, an L2 processor and a modulator. The CS-OFDMA system provided by the present invention combines synchronous CDMA technique and OFDMA technique, overcomes the severe ISI caused by spectrum-spreading by the conventional CDMA system while transmitting wideband data, effectively counteracts frequency-selective fading and inter-cell interference, and is beneficial to reliable transmission of narrowband voice and wideband data and also beneficial to co-frequency networking.09-23-2010
20110110279Relay Transmission Method and Apparatus - A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S05-12-2011
20100238847METHOD AND APPARATUS FOR DATA TRANSMISSION IN A TIME DIVISION DUPLEXING SYSTEM - A method for data transmission in a TDD system is disclosed. The method includes: configuring, by a base station, a length respectively for a Downlink Pilot Slot (DwPTS) and an Uplink Pilot Slot (UpPTS) within a special field of a radio half-frame based on a current coverage area taking one Orthogonal Frequency Division Multiplexing (OFDM) symbol as a unit, and issuing a configured result to a user device, wherein a total length of the DwPTS, a Guard Period (GP) slot and the UpPTS is kept to be 1 ms; constructing, by the base station, radio half-frames for data transmission according to the configured result. An apparatus for data transmission in the TDD system is also disclosed. According to the present invention, coverage area of different levels with smaller granularity is supported, radio resources are saved and transmission efficiency is increased.09-23-2010
20100238845Relay Operation in a Wireless Communication System - A method in a relay node operating in a time division duplex system wherein the relay node transmits downlink pilot timeslot information to a user terminal in a first temporal region of a special sub-frame, communicates with a base station during a second temporal region of the special sub-frame, the second temporal region is configured as a guard period for communications between the relay node and the user terminal, and configures a third temporal region of the special sub-frame.09-23-2010
20100226291MULTI-CHANNEL RADIO FREQUENCY FRONT END CIRCUIT - A front end circuit for coupling a plurality of antennas to a multi-channel time domain duplex RF transceiver is disclosed. The front end circuit has a first transmit port, a first receive chain primary port, a first receive chain secondary ports, and a first antenna port connectible to a first one of the plurality of antennas. The front end circuit also has a second transmit port, a second receive chain primary port, and a second receive chain secondary port connectible to a second one of the plurality of antennas. A first switch has terminals connected to the first transmit port, the first receive chain primary port, and the second receive chain secondary port, as well as a common terminal that is connected to the first antenna port. Additionally, the front end circuit has a second switch that has terminals connected to the second transmit port, the second receive chain primary port and the first receive chain secondary port, and a common terminal connected to the second antenna port.09-09-2010
20100246456METHOD AND AN APPARATUS FOR DETERMINING THE RADIO FRAME STRUCTURE OF TIME DIVISION DUPLEX SYSTEM - A method for determining the radio frame structure of a Time Division Duplex system is disclosed, which comprises: configuring, by the network side, the radio frame structure used for service transmission as containing two half-frames each of 5 ms, wherein each half-frame consists of eight service time slots of 0.5 ms and one special time slot field of 1 ms, two consecutive service time slots form a subframe of which the length is 1 ms, and the special time slot field contains a DwPTS, a GP and an UpPTS; determining the lengths of the DwPTS, the GP and the UpPTS in the special time slot field according to the requirements of the coverage range, and determining the radio frame structure used for service transmission. By reconfiguring the radio frame structure, the invention can flexibly support different coverage ranges, enhance the flexibility of satisfying different service requirements, and implement the coexistence of two types of TDD systems.09-30-2010
20100254289METHOD FOR TRANSCEIVING A SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a prescribed frame structure in a wireless communication system is disclosed. A mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. Moreover, the mobile station is able to transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol, which is designed to mutually coexist without causing collision or interference with another frame structure with a different CP length. In this case, a channel bandwidth of the prescribed frame structure is 7 MHz.10-07-2010
20110058506DEVICE AND METHOD FOR TRANSMITTING CHANNEL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - This invention relates to a device and a method for transmitting channel information in a wireless communication system. The disclosed device and method are characterized by: estimating channels by dividing the channel matrix elements for a complex channel into a real number part and an imaginary number part; quantizing each channel which is estimated through the division into the real and imaginary number parts based on a preset boundary value; generating the channel information corresponding to the quantization value for the real and imaginary number parts of the channel matrix elements; and transmitting the generated channel information to a transmitter.03-10-2011
20110058504SCHEDULING METHOD, MS APPARATUS USING THE SCHEDULING METHOD, DATA TRANSMISSION METHOD, AND BS APPARATUS USING THE DATA TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM - In the MS apparatus for performing scheduling, a reception module receives any number information through a specific downlink channel in a first time unit from each of neighbor BSs. A scheduling module determines, among the neighbor BSs, a BS which is to transmit and receive data using a downlink data transmission region and an uplink data reception region, respectively, in a second time unit according to a previously set rule based on the number information. A transmission module transmits a signal, indicating that data transmission and reception using the downlink transmission region and uplink data reception region, respectively, in the second time unit are not possible, to the other neighbor BSs excluding the determined BS among the neighbor BSs.03-10-2011
20100208629METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation.08-19-2010
20100208628MOBILE STATION, WIRELESS ACCESS NETWORK DEVICE, MOBILE COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A mobile communication system for performing two-way communication between a mobile station and a wireless access network apparatus. The mobile station comprises a connection setup signal reception timing calculating part that calculates the reception timing of a connection setup signal when a connection request signal is transmitted; and a connection setup signal determining part that determines, in accordance with the reception timing, whether the connection setup signal is received, and then performs, based on that determination, a reception process. The wireless access network apparatus comprises a connection setup signal scheduling part that performs, based on the reception timing of the connection request signal, a transmission assignment of the connection setup signal when the connection request signal is received from the mobile station; a connection setup signal creating part that creates the connection setup signal addressed to the mobile station; and a connection setup signal transmitting part that transmits, based on the transmission assignment, the connection setup signal.08-19-2010
20110110280Relay Transmission Method and Apparatus - A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S05-12-2011
20100195544Apparatus and Method for Communicating Uplink Signaling Information - A User Equipment, UE, of a cellular communication system transmits scheduling assistance data to a base station comprising a base station scheduler which schedules uplink packet data. The scheduling assistance data relates to uplink packet data transmission from the UE. The UE comprises a channel controller which is operable to cause the scheduling assistance data to be transmitted from the UE to the base station in a first physical resource of an uplink air interface. The first physical resource is not managed by the base station based scheduler. The scheduling assistance data may specifically be transmitted in a first transport channel multiplexed with other transport channels on a physical resource. The transport channels may be individually optimized and may have different termination points and transmission reliabilities. Specifically, the transport channel supporting the scheduling assistance data signaling may have a high reliability and be terminated in the base station.08-05-2010
20090073902Subframes in a cellular communications system - The invention discloses a method for a cellular communications system, in which traffic is sent in frames, each frame comprising a first number of subframes, with a second number of said subframes being available for at least either uplink or downlink traffic. At least one of said second number of subframes is made to comprise at least three parts, as follows: 03-19-2009
20110032851Apparatus and Method for Communicating Signaling Information - An apparatus, such as a base station, transmitting signaling information in a cellular communication system whereby a plurality of shared uplink transmission resources is divided into sets of mutually exclusive transmission resources. The apparatus comprises means for granting uplink resources to a wireless subscriber communication unit via a grant message for uplink transmission; means for receiving an uplink transmission from a wireless subscriber communication unit; means for deriving an uplink code resource identifier from the uplink transmission or the grant message; means for assigning at least one downlink code sequence used to carry downlink signaling information associated with the uplink transmission and which is derived using the uplink code resource identifier; and means for transmitting a downlink transmission comprising the at least one downlink code sequence to the wireless subscriber communication unit.02-10-2011
20110032850SIGNAL TRANSMISSION WITH FIXED SUBCARRIER SPACING WITHIN OFDMA COMMUNICATION SYSTEMS - A station is disclosed that is configured for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The station includes a processor configured to fix a subcarrier spacing to a predetermined value for one or more subframes in all available bandwidths. The station further includes a transmitter configured to transmit a signal having the fixed subcarrier spacing, regardless of a frame structure of the one or more subframes. According to certain embodiments, the predetermined value may be divided evenly by at least one channel raster. The predetermined value may be 12.5 KHz, according to certain embodiments. Alternatively, the predetermined value is 6.25 KHz for one or more low mobility mobile stations, and/or the predetermined value is 25 KHz for one or more high mobility mobile stations. The station may be a mobile station or a base station configured for uplink and downlink transmission.02-10-2011
20110032849SYSTEMS AND METHODS FOR MITIGATING INTERFERENCE BETWEEN ACCESS POINTS - Systems and methods which implement cooperative techniques at wireless network access points to provide interference mitigation are shown. Embodiments utilize cooperative antenna beam adaptation techniques wherein antenna beam selection, selective antenna beam transmission power, and/or antenna beam null selection is implemented based upon the communication environment created by a plurality of access points. Additionally or alternatively, embodiments utilize cooperative antenna beam isolation techniques wherein narrow channel filters are implemented with respect to antenna beam signals and/or shielding is provided between various antenna beams based upon the communication environment created by a plurality of access points. Embodiments additionally or alternatively utilize cooperative antenna beam coordination techniques wherein transmission and/or reception of signals is coordinated, the use of antenna beams is coordinated, and/or interference cancellation is implemented based upon the communication environment created by a plurality of access points.02-10-2011
20080285490RADIO COMMUNICATION SYSTEM, TERMINAL APPARATUS AND BASE STATION APPARATUS - A radio communication system which includes a base station apparatus and terminal apparatuses and performs TDD two-way communications using an OFDM signal including subcarriers in a downstream communication from the base station apparatus to each terminal apparatus, and an FH signal having the same frequency band as that of the subcarriers in an upstream communication from the each terminal apparatus to the base station apparatus, the each terminal apparatus estimates transmission channel characteristics of the subcarriers based on the OFDM signal received, transmits an estimation result of the estimation unit to the base station apparatus, and the base station apparatus assigns, to the each terminal apparatus, at least one of subcarriers to be used in the downstream communication of the subcarriers and a hopping pattern to be used in the upstream communication, based on the estimation result transmitted from the each terminal apparatus.11-20-2008
20100278083METHOD FOR ESTABLISHING TIME DOMAIN STRUCTURE OF A FRAME IN A HETEROGENEOUS TDD SYSTEMS ENVIRONMENT - Disclosed in a method for establishing a time domain structure of a frame in a heterogeneous TDD systems environment. In other words, in a situation of coexisting heterogeneous systems comprising a first system corresponding to an existing TDD system and a second system corresponding to a new system, a method is provided for establishing a time domain structure of a second frame for the second TDD system mode to enable it to coexist with a first frame for the first TDD (Time Division Duplex) system mode, that comprises obtaining information for the first supported system type and a first ratio between the downlink region and the uplink region of the first frame structure, and then, according to the obtained information, establishing a second ratio between the downlink region and the uplink region of the second frame structure for the second system. Further, particular numerology is provided for said method.11-04-2010
20130136040LTE WIRELESS COMMUNICATION METHOD FOR TRANSCEIVING WIRELESS DEVICE DATA - The present invention relates to an LTE wireless communication method for transceiving wireless device data. In one embodiment, this is accomplished by a plurality of base transceiver station (BTS) linked by a network over which the base transceiver stations communicate, wherein the network includes at least one leaf BTS and at least two hub BTS, and wherein hub BTS include a first hub BTS and a second hub BTS, checking periodically for control signal by all the BTS, wherein the control signals are periodically exchanged by all the BTS through wireless channel, transparently, down-linking user traffic towards a user equipment append to the leaf BTS from the first hub BTS to the leaf BTS in the first communication area using a first frequency band and up-linking the user traffic from the user equipment append to the leaf BTS using wireless channel between second hub BTS and leaf BTS.05-30-2013
20130136041Automatic Guard Period Adjustment in Time Division Duplexed Wireless Communication - The present invention is directed to methods for adjusting a guard period in a cellular wireless communication system, to a base station adapted to adjust a guard period, and to a network management entity for adjusting a guard period. One method comprises the steps: obtaining (S05-30-2013
20100309826METHOD FOR SENDING PHYSICAL HYBRID ARQ INDICATOR CHANNEL SIGNALS IN A DOWNLINK PILOT TIME SLOT - A method for sending physical hybrid ARQ indicator channel signals in a downlink pilot time slot, comprises steps as follows: the PHICH signals are sent in one or more symbols included in the DwPTS by a base station, and the OFDM symbol used for sending the PHICH signals by the base station differs from the OFDM symbols used for sending P-SCH signals and S-SCH signals by the base station. According to the method, not only the problem of the confliction between the PHICH signals and the synchronization channel signals in the DwPTS is solved, but also the time delay for sending the PHICH signals is reduced as much as possible, thus an influence on other channels is reduced, and processing of other channels is facilitated.12-09-2010
20110122801USER EQUIPMENT CAPABILITY BIASING - In accordance with the exemplary embodiments of the invention there is at least a method, apparatus, and executable computer program to perform operations including receiving at a user equipment information from a network access node, prioritizing capability information of the user equipment in accordance with the received information, and transmitting all or at least part of the prioritized capability information to the network access node.05-26-2011
20100322119METHODS AND APPARATUS FOR MULTI-CARRIER COMMUNICATIONS WITH VARIABLE CHANNEL BANDWIDTH - Methods and apparatus for multi-carrier communication with variable channel bandwidth are disclosed, where the time frame structure and the OFDM symbol structure are invariant and the frequency-domain signal structure is flexible. In one embodiment, a mobile station, upon entering a geographic area, uses a core-band to initiate communication and obtain essential information and subsequently switches to full operating bandwidth of the area for the remainder of the communication. If the mobile station operates in a wide range of bandwidths, the mobile station divides the full range into sub-ranges and adjusts its sampling frequency and its FFT size in each sub-range.12-23-2010
20100322116METHOD AND SYSTEM FOR ESTIMATING ADAPTIVE COMBINED CHANNEL IN CDMA SYSTEM BASED ON TIME DIVISION DUPLEX SYSTEM - Disclosed is a method and system for estimating an adaptive joint channel in a CDMA system based on TDD. The method includes the steps of a) receiving activity information of a mobile terminal; b) parsing the activity information, and transmitting a midamble sequence to the mobile terminal when a result of the parsing shows that the mobile terminal is in an ON state; c) conducting adaptive joint channel estimation by using the midamble sequence in the mobile terminal; and d) conducting adaptive joint detection by using a channel impulse response of the mobile terminal, obtained as a result of conducting the adaptive joint channel estimation. The method and system decreases the complexity in channel estimation and additionally increases the accuracy of channel estimation by reducing transmission power consumption and eliminating unnecessary interference.12-23-2010
20100322118METHOD, SYSTEM AND APPARATUS FOR IMPLEMENTING CELL HANDOVER - It is disclosed a method and system for implementing a cell handover, which are used to solve the problem in the prior art that the cell handover can not be implemented when a target cell uses a TDD mode. The method for implementing the cell handover includes: when a user terminal needs perform the cell handover, a network side sending a cell handover command to the user terminal; when the target cell uses the TDD mode and the cell handover command carries TDD slot configuration information of the target cell, the user terminal implementing the cell handover according to the TDD slot configuration information in the cell handover command. It is further disclosed a user terminal and a Base Station, which are used to implement the cell handover in a TDD system.12-23-2010
20100322117METHODS AND APPARATUS FOR INITIAL ACQUISITION IN A COMMUNICATION SYSTEM - Disclosed are methods and apparatus for initial acquisition in a communication system, and in particular Time Division Duplex (TDD) systems such as those found in LTE. A disclosed method, for example, includes running a plurality of predetermined amplifier gain states for a low noise amplifier (LNA) during initial acquisition in a time division duplex (TDD) system, and determining acquisition of a received signal based on searching across the plurality of predetermined amplifier gain states. Forcing the amplifier gain into a set of predetermined gain states affords quicker resolution of initial acquisition for setting the gain of the LNA, which in TDD systems is complicated due to an uncertain uplink/downlink timeline that precludes continuous operation of a gain setting algorithm run in the LNA.12-23-2010
20110128895APPARATUS AND METHOD FOR SPECTRUM SHARING USING LISTEN-BEFORE-TALK WITH QUIET PERIODS - Apparatus and method for spectrum sharing using listen before talk (LBT) and quiet periods are disclosed. This includes assessing using LBT to determine if a shared spectrum channel is being used by at least one other network, and transmitting transmission frames over the shared spectrum channel in at least one of an uplink or a downlink when the channel is determined as not being used. The accumulated time of transmission use of the spectrum channel is counted based on predetermined conditions, and a determination made when the accumulated time exceeds a maximum allotted time. Transmission of frames by a network is allowed to continue if the maximum time has not been exceeded and the spectrum remains available. A quiet period is then executed once the maximum time period is exceeded.06-02-2011
20100260078MULTI-ANTENNA RADIO CHANNEL MEASUREMENT SYSTEM AND METHOD WHICH GENERATES TIME DIVISION DUPLEX TIMING SIGNAL AND MEASURES TWO-WAY RADIO CHANNEL - The present invention relates to a multi-antenna radio channel measurement system and method which generates a Time Division Duplex (TDD) timing signal and measures a two-way radio channel. The multi-antenna radio channel measurement system which measures a probing signal for measuring a radio channel, the multi-antenna radio channel measurement system including: a baseband unit alternately transmits the probing signal for measurement and receives the received channel signal to be measured based on a TDD synchronization time; a synchronization unit which obtains time synchronization with the other radio channel measurement system, generates a transmission/reception synchronization signal, and provides the transmission/reception synchronization signal to the baseband unit; a transceiver unit which up converts the probing signal for measurement and down converts the received channel signal; and a radio frequency (RF) front-end unit which switches suitable antennas according to a timing control signal of the baseband unit.10-14-2010
20090067352METHODS AND APPARATUS FOR INCLUDING MODE INFORMATIONIN A FRAME FOR SYSTEM ACQUISITION - Methods and apparatus for including mode information in a wireless transmission frame, which is useful for system acquisition. In particular, a first information bit is provided in a preamble of a transmission frame, where the bit is configured to indicate that a wireless communication system is operating according to either a time division duplex (TDD) mode or a frequency division duplex (FDD) mode. The addition of a single bit minimally affects the resources of the preamble. Additionally, another bit resource already present in the preamble for normally communicating whether FDD transmissions are full duplex or half-duplex transmissions, may be further allocated to indicate partitioning information concerning TDD mode transmissions when the first bit indicates TDD mode, thus affording additional information communicated in the frame without increasing preamble resources.03-12-2009
20110110278WIRELESS COMMUNICATION DEVICE - An object of the present invention is to improve the throughput and reduce the circuit size and power consumption for transmission.05-12-2011
20110110277MULTIPLE DEVICE TO ONE-ANTENNA COMBINING CIRCUIT AND METHODS OF USING SAME - A multiple device to one-antenna combining circuit for transferring wireless communication signals from a first and second wireless communication device connected to a donor antenna is described. The circuit comprises a first single-stage circulator configured to be coupled to a transmission-reception path of the first wireless communications device; a two-stage circulator coupled to the first single-stage circulator and configured to be coupled a transmission-reception path of the second wireless communications device; a two-way splitter coupled to the two-stage circulator and configured to be coupled a transmission-reception path of the donor antenna; and a second single-stage circulator coupled between the two-way splitter and the first single stage circulator. The wireless transmissions of the first wireless communications device travel from the first signal stage circulator to the two-stage circulator to the two-way splitter to the donor antenna. The first wireless device can be a repeater. The second wireless device can be a telemetry radio. Methods of using the circuit are also provided.05-12-2011
20110032853METHOD AND APPARATUS FOR COMMUNICATION IN A TDD-BASED WIRELESS COMMUNICATION SYSTEM - Disclosed is a method and an apparatus for communication in a TDD (Time Division Duplex) based wireless communication system. The present invention involves setting a first frame comprising a plurality of consecutive downlink subframes and a plurality of consecutive uplink subframes. The start point for the first uplink subframe in the plurality of consecutive uplink subframes, is located at a switching point in a second frame used by another system.02-10-2011
20110032852METHOD AND DEVICE FOR CONFIGURING INTER-CELL TIME DIVISION DUPLEX MODES BASED ON A TDD SYSTEM - The present invention disclose a method and a device for configuring inter-cell time division duplex modes based on a time division duplex system, wherein the method comprises: one or more physical frame pairs which are overlapped in the time domain and have different transmitting modes existing in physical frames of two adjacent cells; for each physical frame pair, setting one or two physical frames of the physical frame pair respectively not to transmit signals. With the technical schemes of the present invention, by means of making part or all of the physical frames overlapped in the time domain not to transmit signals, the uplink/downlink signal interference occurred when the ratios of the numbers of uplink/downlink physical frames between adjacent cells in the same frequency band is different may be avoided.02-10-2011
20110044215COMMUNICATION METHOD FOR RADIO COMMUNICATION SYSTEM - A communication method of a user equipment using a time division duplex (TDD) frame in a wireless communication system is provided. The communication method include configuring a TDD frame comprising at least one downlink subframe and at least one uplink subframe, and transmitting a signal by using the TDD frame, wherein an uplink of the TDD frame starts on the basis of a guard period (GP) or an uplink pilot time slot (UpPTS) of a heterogeneous TDD frame.02-24-2011
20090059820SYSTEM AND METHOD FOR USING FREQUENCY AND TIME RESOURCES IN A COMMUNICATION SYSTEM - A method and system for using frequency resources in a communication system are provided. In the method and system, a total frequency band is divided into at least two frequency subbands and there is a guard interval between frequency subbands. A first frequency subband includes a TDD UL frequency subband and a TDD DL frequency subband. A second frequency subband includes an FDD UL frequency subband. A BS sets a frequency band between the TDD UL frequency subband and an FDD UL frequency subband as an additional UL frequency subband, and receives a signal from an MS in the additional UL frequency subband.03-05-2009
20110243040APPARATUS AND METHOD FOR SPATIAL DIVISION DUPLEX (SDD) FOR MILLIMETER WAVE COMMUNICATION SYSTEM - An apparatus and method for full-duplex millimeter wave mobile wireless communication are provided. The apparatus includes a Spatial Division Duple (SDD) mobile communication system using millimeter waves, the SDD mobile communication system including a first wireless terminal having a first transmit antenna array having a plurality of first transmit antennas for transmitting a spatially beamformed first transmit beam, and a first receive antenna array having a plurality of first receive antennas for forming a spatially beamformed first receive beam and a second wireless terminal including a second transmit antenna array having a plurality of second transmit antennas for transmitting a spatially beamformed second transmit beam directed towards a receive beam of the first wireless terminal, and a second receive antenna array having a plurality of second receive antennas for forming a spatially beamformed second receive beam directed toward the transmit beam of the first terminal.10-06-2011
20110243038AUTOMATIC GAIN CONTROL ACQUISITION IN TIME DIVISION DUPLEX SYSTEMS - In embodiments, user equipment (UE) is configured to acquire automatic gain control (AGC) of an analog RF front end by maintaining a plurality of M×N AGC loops in which the output of the power detector drives input of a gain state machine after a predetermined delay. Each of the loops corresponds to a different periodic set of tasks of (1/M) subframe in length. In each of the loops, the gain is determined by a power measurement taken ((M×N)+1) tasks ago. A synchronization signal, such as a Primary Synchronization Signal, occurs early in Time Division Duplex (TDD) subframes that follow selected downlink subframes. The periodicity of the selected subframes is N. This allows the UE to converge on proper AGC gain for downlink subframes through a relatively short search, such as a binary search. The UE can then decode the synchronization signal and acquire network timing.10-06-2011
20120243448METHOD,SYSTEM AND DEVICE FOR SENDING UPLINK FEEDBACK INFORMATION - A method and device for acquiring user equipment duplex mode information are disclosed by the present invention, wherein, the method includes: the user equipment establishes a radio resource control connection with a base station, and reports the user equipment duplex mode information when establishing the radio resource control connection. With the technical scheme provided in the embodiments of the present invention, the network side acquires the duplex mode of the user equipment.09-27-2012
20120243446MULTI-BAND WIRELESS COMMUNICATION DEVICE WITH MULTIPLEXER AND METHOD OF MULTIPLEXING MULTI-BAND WIRELESS SIGNALS - An apparatus includes: a first multiplexer configured to allow bi-directional communication over a first plurality of multiplexed communication bands that each include a corresponding transmit band and a corresponding receive band, wherein none of the transmit bands of the first multiplexer have transmit frequencies that overlap with any receive frequencies of any of the receive bands of the first multiplexer; a second multiplexer configured to allow bi-directional communication over a second plurality of multiplexed communication bands that each include a corresponding transmit band and a corresponding receive band, wherein none of the transmit bands of the second multiplexer have transmit frequencies that overlap with any receive frequencies of any of the receive bands of the second multiplexer; and an electromechanical band switch configured to selectively connect the first and second multiplexers to a common antenna.09-27-2012
20110128894METHOD AND SYSTEM FOR CALL SETUP IN AN ASYNCHRONOUS FREQUENCY HOPPING DIGITAL TWO-WAY COMMUNICATION SYSTEM - A method for call setup in an asynchronous frequency hopping digital two-way communication system includes transmitting in adjacent time slots, by a caller device, a preamble slot over a first unique fixed frequency selected from a frequency hopset and a synchronization slot over a second unique fixed frequency selected from the frequency hopset. Further, the method includes one or more target devices transmitting an acknowledgement signal upon receiving the preamble slot over the first unique fixed frequency and the synchronization slot over the second unique fixed frequency, and followed by the caller device establishing the data communication link between the caller device and the one or more target devices over at least one random frequency selected from the frequency hopset, in response to receiving the acknowledgement signal from the one or more target devices.06-02-2011
20090323565Wireless Communication Apparatus, Mobile Wireless Communications Control Method, And Wireless Station - A wireless communication apparatus for performing transmission and reception by using a Time Division Duplexing method is disclosed. The wireless communication apparatus includes a receiving part configured to output a timing signal based on a received timing signal, a transmitting part configured to transmit a timing signal based on the timing signal received by the receiving part, a control part configured to increase a reception opportunity for the receiving part to receive the timing signal and decrease a transmission opportunity for the transmitting part to transmit the timing signal as the accuracy of the timing signal received by the receiving part becomes lower.12-31-2009
20090323563HD physical layer of a wireless communication device - A radio frequency (RF) transmitter is coupled to and controlled by a processor to transmit data. A physical layer circuit is coupled to the RF transmitter to encode and decode between a digital signal and a modulated analog signal. The physical layer circuit comprises a high rate physical layer circuit (HRP) and a low rate physical layer circuit (LRP). The low rate channels generated by the low rate physical layer circuit (LRP) share a same frequency band as a corresponding high rate channel generated by the high rate physical layer circuit (HRP).12-31-2009
20090323564METHOD FOR OPERATION OF SYNCHRONOUS HARQ IN A WIRELESS COMMUNICATION SYSTEM - A method of operating synchronous Hybrid Automatic Repeat Request (HARQ) between a transmitting station and a receiving station in a Time-Division Duplex (TDD) communication system includes configuring, at the transmitting station, a plurality of HARQ processes; transmitting data packets to the receiving station using the plurality of HARQ processes, wherein the data packets do not include HARQ process identification information; receiving, from the receiving station, a plurality of HARQ feedback packets indicative of whether the data packets were correctly received at the receiving station, wherein the plurality of HARQ feedback packets do not include HARQ process identification information and wherein the plurality of HARQ feedback packets are received in a downlink slot; and mapping, by the transmitting station, the plurality of HARQ feedback packets to the plurality of HARQ processes.12-31-2009
20110243041Cellular Communication System and Method for Broadcast Communication - A time division duplex (TDD) cellular communication system (10-06-2011
20110243039INDEXING RESOURCES FOR TRANSMISSION OF ACKNOWLEDGEMENT SIGNALS IN MULTI-CELL TDD COMMUNICATION SYSTEMS - Methods and apparatus are described for a User Equipment (UE) to determine a set of resources available for transmitting an acknowledgement signal in an UpLink (UL) Component Carrier (CC) in response to reception of multiple DownLink (DL) Scheduling Assignments (SAs) transmitted from a base station with each DL SA being associated with a respective DL CC. The UL CC and a first DL CC establish a communication link when the UE is configured for communication over a single UL CC and a single DL CC.10-06-2011
20100265855METHOD, APPARATUS AND SYSTEM FOR FORMING TIME DIVISION DUPLEX MULTI-INPUT MULTI-OUTPUT DOWNLINK BEAMS - A method, an apparatus, and a system for forming Time Division Duplex (TDD) Multi-Input Multi-Output (MIMO) downlink beams are disclosed herein. The method includes: generating a transmitting beam of a first data stream according to a Maximum Rate Transmission (MRT) criterion; and generating transmitting beams of other data streams except the first data stream, wherein the transmitting beams of other data streams are confined in a null space of the transmitting beam of the first data stream. Through the embodiments of the present invention, the Base Station obtains precise Partial Channel State Information by using only reciprocity without requiring feedback information, and thus the calculation is simplified and the rate of data streams is improved.10-21-2010
20110085478Relay Transmission Method and Apparatus - A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S04-14-2011
20100054162APPARATUS AND METHOD FOR FRAME GENERATION FOR A FULL DUPLEX RELAY - An apparatus and method for generating a frame in a communicating system supporting a full duplex relay. A controller configures a legacy zone and a new zone in a downlink section of the frame according to a TDM scheme, configures the new zone of the downlink section to include an access zone and a relay zone according to a TDM scheme, configures a legacy zone and a new zone in an uplink section of the frame according to the TDM scheme, and configures the new zone of the uplink section to include an access zone and a relay zone according to an FDM scheme.03-04-2010
20100054161SUPPORTING MULTIPLE ACCESS TECHNOLOGIES IN A WIRELESS ENVIRONMENT - Support for multiple wireless access technologies at a common terrestrial radio access network is described herein. By way of example, wireless resources can be reserved in a manner that facilitates transmission of control and reference signals to advanced or emerging-technology user terminals (e.g., LTE-A), while mitigating adverse affects on legacy user terminals (e.g., LTE Release 8). As such, information designated for LTE-A terminals can be embedded in predetermined reserved locations, which exploit known standardized behavior of legacy terminals in expecting information at specific locations. Such reserving of resources can occur typically without the legacy terminals being affected, mitigating or avoiding performance degradation for legacy terminals.03-04-2010
20100135192Array Antenna System in Base Station - An array antenna system in a BS, in which a horizontal-beam-radiation-pattern-forming module has a horizontal-beam-radiation-pattern-former to form a horizontal beam radiation pattern for transmission/reception signals, dividing signals received from input/output ports at one end, shifting the phases of the divided signals complementarily, combining the phase-shifted signals from the different input/output ports at the one end, outputting the combined signals to input/output ports at the other end, and outputting signals received from the input/output ports at the other end by a reverse operation to the input/output ports at the one end, receives/outputs a plurality of transmission/reception signals from/to a BTS via the input/output ports at the one end of the horizontal-beam-radiation-pattern-former, and receives/outputs a plurality of transmission/reception signals from/to a plurality of antennas via the input/output ports at the other end of the horizontal-beam-radiation-pattern-former, and a plurality of vertical-beam-radiation-pattern-forming modules are installed on an antenna basis to form a vertical beam radiation pattern for the transmission/reception signals, each for receiving a transmission signal from the horizontal-beam-radiation-pattern-forming module, dividing the transmission signal, providing the divided signal to antenna elements, filtering and amplifying signals received from the antenna elements according to a predetermined reception band, combining the amplified signals, and providing the combined signal to the horizontal-beam-radiation-pattern-forming module.06-03-2010
20110249597METHOD AND APPARATUS FOR PILOT-REUSE IN RECIPROCITY-BASED TRAINING SCHEMES FOR DOWNLINK MULTI-USER MIMO - A method and apparatus is disclosed herein for employing pilot-reuse for training in the downlink of a wireless communication network. In one embodiment, the method comprises coordinating assignment of pilot codes across base stations in the topology and coordinating assignment of codes across base station-user terminal pairs, including assigning, from a set of pilot codes, a subset of codes to each cell in the topology, and assigning codes in each subset of codes to user terminals in said each cell based on cell dependent criteria; receiving waveforms from user terminals transmitting their assigned pilots; obtaining channel estimate information for channels between base station antennas and user terminals to which the base station is transmitting, the channel estimates based on the received waveforms; and transmitting to user terminals based on the channel estimate information.10-13-2011
20110249598COMMUNICATIONS APPARATUS AND METHOD TO AVOID INTERFERENCE - A technique for time domain avoidance of communications link interference sources characterized by intermittent, periodic short bursts of energy. A transmitting source can be assigned two time slots within a time domain multiple access data frame over which each data packet can be transmitted. The time slots are separated by a duration greater than that of an interference burst, such that an interference burst does not affect both time slots in any given frame. Therefore, the data packet can be received on at least one of the two assigned time slots. Transmitter power consumption can be reduced by calculating the timing of the periodic interference bursts, and only transmitting a data packet on one of the two assigned time slots that will not coincide with an interference burst in each frame. Communications link capacity can be improved during the presence of interference by synchronizing the data frame to the timing of the interference bursts. The bursts then occupy fixed time slots in each data frame, enabling standard single time slot transmissions for the remaining communications channels in the data frame.10-13-2011
20120120855Method and Apparatus in a Telecommunication System - Method and apparatus in a communication unit employing a wireless TDD or half duplex FDD transmission arrangement when communicating with a data sending party, for scheduling feedback reports for data blocks in received receive (RX) sub-frames, in transmit (TX) sub-frames available for transmission. An obtaining unit in the communication unit receives allocation parameters for the connection where the number of required feedback reports is greater than the number of allowed feedback reports. A scheduling unit in the communication unit then schedules feedback reports in available TX sub-frames according to a predetermined spreading rule also known by the data sending party, dictating that the feedback reports are spread out or distributed evenly over the available TX sub-frames. In this way, the number of feedback reports in a TX sub-frame can be reduced.05-17-2012
20120120854METHOD AND SYSTEM FOR DYNAMIC ADJUSTMENT OF DOWNLINK/UPLINK ALLOCATION RATIO IN LTE/TDD SYSTEM - A method and system for dynamic adjustment of downlink/uplink resource allocation ratio in a long-term evolution (LTE) time division duplex (TDD) system is disclosed. The method includes replacing at least one uplink subframe in a subframe pattern with at least one of a mute subframe and a mute uplink pilot timeslot (UpPTS), within a geographical guard area that isolates at least two areas having different TDD allocation patterns. The method further includes scheduling an uplink transmission from at least one mobile terminal such that the at least one of the mute subframe and the mute UpPTS are unused. A simple solution or a TDD configuration index substitution solution, or any combination thereof, may be used to control the uplink transmission involving a mute subframe or a mute UpPTS.05-17-2012
20090213768WIRELESS COMMUNICATION SYSTEM FOR TIME DIVISION DUPLEX - Disclosed is a wireless communication system applicable to a time-division duplex transceiver system. The time-division duplex mobile communication system can achieve miniaturization, low power consumption and low costs by using a frequency conversion circuit including a mixer and an intermediate frequency (IF) circuit for both transmitter and receiver, and also can cope with multi-band, multi-application systems by using a broadband amplifier, a variable IF filter and a variable gain amplifier.08-27-2009
20090022073Repeated Channel Adaptive Frequency Hopping - The invention provides systems, devices, and methods for frequency hopping. In one method embodiment, the invention hops between frequencies by using the same channel to transmit data from a master to a slave, and from the slave to the master. One system embodiment provides an enhanced master coupled to an enhanced slave. In one device embodiment, the invention is a computer readable medium adapted to enable frequency hopping in a frequency band.01-22-2009
20110075593WIRELESS COMMUNICATION TRANSCEIVER AND MODE-SWITCH DEVICE THEREOF - A wireless communication transceiver and a mode switch device thereof. The transceiver includes: a first band transmission path; a first band reception path; a second band transmission path; a second band reception path; a path switch and a control unit. In a dual band time division duplexing mode, the control unit controls the path switch so that the path switch connects a received radio frequency signal from an antenna to the first band reception path, and connects a transmitted radio frequency signal from the second band transmission path to the antenna in an odd cycle or an even cycle; and controls the path switch so that the path switch connects a received radio frequency signal from the antenna to the second band reception path, and connects a transmitted radio frequency signal from the first band transmission path to the antenna in another odd cycle or another even cycle.03-31-2011
20120201176Method of and Equalizer for Equalizing a Radio Frequency Filter08-09-2012
20110058505Method And Device For Configuring Uplink Sounding Reference Signal - The present invention provides a method for configuring a Sounding Reference Signal (SRS). The method includes: determining, by a base station, an SRS periodicity available for a cell, and determining at least one SRS configuration position available in a sub-frame for the cell based on the SRS periodicity determined; and jointly coding, by the base station, the SRS periodicity and the at least one SRS configuration position, and transmitting a result of the joint coding to all User Equipments (UE) in the cell through broadcast signaling. The present invention also provides an apparatus for configuring an SRS. The present invention implements configuration of SRS transmission and can avoid conflict between SRS and uplink control information.03-10-2011
20110149813FLEXIBLE SUBFRAMES - The technology disclosed provides the ability for a subframe to be configured as a “flexible” subframe. As a result, at least three different types of subframes in a TDD system may be configured: a downlink (“DL”) subframe, an uplink (“UL”) subframe, and a “flexible” subframe. While the DL and UL subframes are preconfigured for each frame instance, the flexible subframes are dynamically allocated to be an uplink subframe in one instance of a frame and a downlink subframe in another instance of the frame.06-23-2011
20110026443RADIO COMMUNICATING DEVICE, ROTATIONAL STRUCTURE, AND ELECTRONIC DEVICE - Disclosed herein is a radio communicating device including: a first communicating block; a second communicating block rotatable about an axis of rotation relative to the first communicating block; and a radio signal transmission line capable of information transmission by radio between the first communicating block and the second communicating block; wherein between the first communicating block and the second communicating block, a signal to be transmitted is converted into a radio signal of a circularly polarized wave, and the radio signal of the circularly polarized wave is transmitted via the radio signal transmission line.02-03-2011
20110211503DYNAMIC ALLOCATION OF SUBFRAME SCHEDULING FOR TIME DIVISON DUPLEX OPERATION IN A PACKET-BASED WIRELESS COMMUNICATION SYSTEM - Systems and methods for enabling the dynamic allocation of certain sub frames as downlink or uplink resources in a time division duplexed over the air communications system. A base station or eNB may allocate certain subframes within a repeating radio frame of a TDD configuration as either DL or UL subframes for communicating to user equipment or UE devices to increase efficient use of system resources based on the data to be transmitted. Methods for determining the capabilities of a selected UE and based on the determining step, dynamically allocating certain subframes are disclosed. The methods and systems are compatible with user equipment that does not support the dynamic allocation of subframes.09-01-2011
20100260079Methods and Devices for Transmitting/Receiving Data Based on the Allocation of Random Access Resources to Uplink Subframes - The invention relates to methods and communication devices in a network comprising the steps of mapping (S10-14-2010
20100260080TRANSMITTING METHODS OF A SIGNAL ON A RANDOM ACCESS CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - A transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. Another transmitting method of a signal on a random access channel in a wireless communication system, comprises the steps that: a terminal transmits a cyclic prefix and a preamble on the random access channel with a set time length ahead of the end position of an uplink pilot time slot, and the length of the preamble is the length of two symbols without a cyclic prefix. The methods can avoid the interference of the preamble to the data of the uplink subframe, and can improve the coverage area of the random access channel and the work efficiency of the time division duplex system.10-14-2010
20100254287MOBILE COMMUNICATIONS SYSTEM, BASE STATION APPARATUS, USER APPARATUS, AND METHOD - A user apparatus for use in a mobile communications system is disclosed. The user apparatus includes a unit which determines, using acknowledgement information received from a communications counterpart, whether retransmission is required for a transmitted signal; and a unit which transmits, to the communications counterpart, a signal required to be retransmitted according to a round-trip delay (RTD) which is set for the user apparatus for retransmission control, wherein, the RTD of the user apparatus is arranged to be changed, when the user apparatus enters a region which uses an RTD shorter than the RTD set for the user apparatus to an integer multiple of the shorter RTD.10-07-2010
20100254288METHOD FOR TRANSCEIVING A SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal using a prescribed frame structure in a wireless communication system is disclosed. A mobile station can transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol. Moreover, the mobile station can transmit or receive a signal using a frame structure with a CP length corresponding to ¼ of a useful symbol.10-07-2010
20100097963Method and a Device for Enhanced Performance in a Cellular Wireless TDD System - The invention discloses a method (04-22-2010
20100097962Communication Control Method, Base Station Device, Terminal Device, and Communication Control System Using TDD-OFDMA Communication Method - In a communication system and a communication method using a TDD-OFDMA communication method, inter-carrier interference due to delay dispersion is prevented by suppressing the delay time within a guard interval.04-22-2010
20100027446Method of Transmitting Scheduling Information In TDD System - A method of transmitting scheduling information in time-division-duplex(TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe.02-04-2010
20100265854Methods and Devices for Communicating on a Radio Channel Based on Jointly Encoding a Preamble Format with Random Access Configuration - The invention relates to devices and methods for transmitting data on a radio channel comprising to jointly encode (S10-21-2010
20090279458Uplink and Downlink Hybrid Automatic Repeat Request In Time Division Multiplex Communications - This invention notes various patterns of uplink and downlink communication in a wireless communication system which satisfy the requirement that a user equipment receiving a downlink grant in subframe n needs to transmit response ACK/NAK bits in an uplink subframe n+k, where k>3 and a user equipment receiving a DL grant or ACK/NAK on physical hybrid automatic repeat request channel (PHICH) in subframe n needs to transmit or retransit UL data bits in an uplink (UL) subframe n+k, where k>3.11-12-2009
20090274075Radio Communication Apparatus - A radio communication apparatus performing time division duplex alternately switching a transmission period and a reception period by time dividing an identical frequency, includes the steps of: detecting a transmission signal to be transmitted to the antenna so as to perform radio transmission from an antenna commonly used for transmission and reception; and calculating a deviation time between the detection timing of the detected transmission signal and a preset reference timing, and for controlling switchover timing between the transmission period and the reception period based on the deviation time.11-05-2009
20080247336Radio Communication System and Door Phone System Using the Same - To implement highly-reliable information transmission to a plurality of counterparties by using one radio resource.10-09-2008
20110211502ASYMMETRIC TDD IN FLEXIBLE USE SPECTRUM - A method according to an embodiment of the invention includes receiving and transmitting signals over a time division duplex (TDD) communication path. Signals are received over the TDD communication path via a first portion of a first frequency band. The first frequency band is adjacent to a second frequency band and to a third frequency band. The first frequency band is different from the second frequency band and from the third frequency band. A first frequency division duplex (FDD) communication path can be operable in the second frequency band. A second FDD communication path can be operable in the third frequency band. Signals are transmitted over the TDD communication path via a second portion of the first frequency band that is different from the first portion of the first frequency band.09-01-2011
20090190510APPARATUS AND METHOD FOR FRAME SYNCHRONIZATION TIMING DETECTION AND MOBILE TERMINAL - A synchronization timing detecting method for a receiving device which receives a radio signal including a known symbol on a certain cycle and a gap period which is formed with a certain timing relation based on a transmit timing of the known symbol, wherein synchronization is not achieved in the gap period and the gap period has a longer duration than a certain time, includes receiving the radio signal to detect the gap period in which symbol synchronization is not achieved and which is longer than the certain time, and detecting the known symbol at a timing determined by the certain timing relation based on the gap period detected.07-30-2009
20090046606Adaptive Frame Structure for TDD Point-to-Point Wireless Transmission - The present invention relates to an arrangement for point-to-point transmission over links between first and second link (end) terminals in a system implementing time division duplex (TDD) and wherein information is sent over the links in frames divided into time slots. It is adapted to determine the lengths of the frames on a per link basis using one or more link parameters, the frame length hence being variable.02-19-2009
20080267098MIMO SYSTEM WITH MULTIPLE SPATIAL MULTIPLEXING MODES - A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas. For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.10-30-2008
20110255451METHOD AND APPARATUS FOR DATA TRANSMISSION USING A DATA FRAME - A method and apparatus for transmitting data using a frame in a broadband wireless communication system are disclosed. The method for transmitting and receiving data in a broadband wireless communication system includes: setting a data frame for transmitting and receiving data through uplink and downlink; and transmitting and receiving data through the set data frame, wherein the data frame includes one or more first subframes and one or more second subframes including a different number of data symbols from that of data symbols of the first subframe.10-20-2011
20100309827METHOD AND APPARATUS FOR PROCESSING SIGNALS AT TIME DIVISION DUPLEX TRANSCEIVER - Provided is a time division duplex (TDD) transceiver. A receiver chain processing received signals and a transmitter chain processing signals to be transmitted share an electronic component used in a circuit, such as an amplifier, a mixer, a filter, etc., so that the size of a semiconductor die needed to manufacture a radio frequency (RF) chip can be reduced.12-09-2010
20100278082METHOD AND ARRANGEMENT IN A TELECOMMUNICATION SYSTEM - The present invention relates to a method and a radio base station for generating and assigning a different DL/UL transmission pattern to each terminal of a set of mobile terminals, which mutually unique patterns allow each terminal to receive downlink system information thereon.11-04-2010
20080205305Joint Detection (Jd) Method for Adjacent Cells in Tdd-Cdma System - A method for performing multi-user joint-detection in a neighboring cell in a TDD-CDMA system presets slot types and includes: a network device configuring a slot type of each uplink slot in its administrated cells and a base station of each cell obtaining a slot type of each uplink slot in a neighboring cell from the network device; the network device configuring for each user a slot for transmitting uplink data and a midamble and channelization code to be used according to the slot type of each uplink slot and a service type of each user in each cell; each user in each cell using the configured midamble and channelization code to transmit uplink data in the configured slot; and the base station detecting activated code channels in the neighboring cell according to the received uplink data transmitted by users in the neighboring cell and obtaining midamble used by each user in the neighboring cell according to the channeliazation codes of the activated code channels and according to the slot type of each uplink slot in the neighboring cell so that the base station may perform the multi-user joint-detection in the neighboring cell.08-28-2008
20110261730APPARATUS AND METHOD FOR DATA TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A data transmitter for a wireless communication system is provided. Said apparatus comprises an OFDM (Orthogonal Frequency Division Multiplexing) symbol generating part that generates a plurality of OFDM symbols, a frame configuration part that configures a frame comprising includes said plurality of OFDM symbols, and a transmission part that transmits said plurality of OFDM symbols based on said frame that has been configured. Said frame is divided into a plurality of sub-frames, the number of OFDM symbols that are included in an optional sub-frame is any one of 5, 6, and 7, and the bandwidth of said wireless communication system is 8.75 MHz. Based on a new frame configuration, new parameter requirements may be satisfied taking backward compatibility into account.10-27-2011
20110261731METHOD FOR UPLINK POWER CONTROL IN OFDMA TDD SYSTEM - The present invention relates to a method for uplink power control in an OFDMA TDD system. The method for uplink power control according to the present invention comprises: calculating an RSSI average by using RSSI measured from a downlink signal; and carrying out an uplink power control based on the RSSI average, with the RSSI average being calculated by using a weight that is determined depending on a channel variation rate and link symmetry.10-27-2011
20110255450MULTIPLEXING OF PEER-TO-PEER (P2P) COMMUNICATION AND WIDE AREA NETWORK (WAN) COMMUNICATION - Techniques for supporting peer-to-peer (P2P) communication and wide area network (WAN) communication are disclosed. In one aspect, P2P communication may be supported on an uplink spectrum. A user equipment (UE) may communicate (i) with a base station on both a downlink spectrum and an uplink spectrum for WAN communication and (ii) with another UE on only the uplink spectrum for P2P communication. In another aspect, P2P communication may be supported by time division multiplexing the downlink and uplink (or transmit and receive links) for two UEs. In yet another aspect, WAN communication and P2P communication may be time division multiplexed, so that both can be concurrently supported by a UE. In yet another aspect, transmission gaps may be provided between WAN transmissions and P2P transmissions in order to avoid interference between these transmissions.10-20-2011
20080219190Random Access in Time Division Duplex Communication Systems - A mobile terminal is operated in a cellular communications system that comprises a base station operating in a time division duplex mode. The mobile terminal detects a downlink transmission from the base station and determines therefrom a future moment in time at which an end part of a downlink transmission just prior to a random access window will become detectable at the mobile terminal. An uplink random access transmission is begun at a moment in time that is before the future moment in time. The moment in time that is before the future moment in time can be a fixed amount of time before the future moment in time. If the mobile terminal is not near the edge of the cell, the base station may consequently receive only a partial uplink random access transmission, but this does not detrimentally affect performance.09-11-2008
20110096701TRANSMISSION METHOD FOR WIRELESS RELAY SYSTEM AND RELAY STATION USING THE SAME - A transmission method for a wireless relay system and a relay station using the same are provided. The wireless relay system includes at least a base station (eNB), at least a relay node (RN) and at least a user equipment (UE). The eNB is facilitated by the RN to provide a data transmission service to the UE. Besides, there are pre-configured timing relationships between at least a grant signalling transmission process, at least a data transmission process and at least a feedback signal transmission process of HARQ processes between the eNB, the RN and the UE.04-28-2011
20100097964Method And A Device For Enhanced Performance In A Cellular Wireless TDD System - The invention discloses a method (04-22-2010
20100214965APPARATUS AND METHOD FOR SUPPORTING PARTIAL FREQUENCY DIVISION DUPLEX IN A COGNITIVE RADIO WIRELESS COMMUNICATION SYSTEM - An operating method and apparatus of a Customer Premise Equipment (CPE) in a Cognitive Radio (CR) wireless communication system and a base station in the CR wireless communications system are provided. The method includes, when receiving a beacon message from a Primary User (PU), transmitting a mode change request message including a signal strength from the PU and a channel number interfering with the PU to a base station, when receiving a mode change reply message from the base station, determining whether a partial Frequency Division Duplex (FDD) scheme is applied, and, when the partial FDD scheme is applied, communicating by receiving a downlink burst in a Time Division Duplex (TDD) channel indicated by the mode change reply message and transmitting an uplink burst in an FDD channel indicated by the mode change reply message.08-26-2010
20100165892APPARATUS AND METHOD FOR IMPLEMENTING EFFICIENT REDUNDANCY AND WIDENED SERVICE COVERAGE IN RADIO ACCESS STATION SYSTEM - Disclosed is an apparatus and a method for implementing efficient redundancy and an expanded service coverage in a Radio Access Station (RAS) system. In the RAS system, if the main processor unit generates switching control signals in response to the sensed failures on sensing a failure in any of the channel cards and the transceivers or a failure in any of the high-power amplifiers, all supporting M (i.e., the number of FAs equal to or more than three) and K (i.e., the number of sectors equal to or more than three), between the transceivers and the predetermined Time Division Duplex (TDD) switches connected to the antennas, the RF switch unit switches a path based on the generated switching control signals so as to substitute the failed module either by one additional redundancy transceiver per M and K or by one additional redundancy high-power amplifier per M and K. As a result, an efficient N+1 redundancy structure is embodied.07-01-2010
20100165893TELECOMMUNICATIONS NETWORK - The present invention relates generally to a cellular telecommunications network. Each cell has at least one base station for sending messages on a downlink of a Frequency Division Duplex (FDD) to end user equipments within the cell and for receiving messages on an uplink from end user equipments within the cell. Other end user equipment located within the cell which have no or only poor communication directly with the base station over the FDD communicate with the base station indirectly via an intermediate end user equipment, such as a mobile telephone. The intermediate end user equipment includes an FDD transceiver and a Time Division Duplex (TDD) transceiver and an FDD/TDD interface. The intermediate end user equipment receives signals from the base station over the FDD using the FDD transceiver and relays them via the FDD/TDD Interface and the TDD transceiver towards a relevant one of the other end user equipments over a TDD and receives signals from the other end user equipment over the TDD using the TDD transceiver and relays them via the FDD/TDD interface and the FDD transceiver to the base station over the FDD. The network provider thereby improves capacity and coverage by utilising TDD channels without having to deploy and TDD infrastructure.07-01-2010
20100195545SYSTEMS AND METHODS FOR ADAPTIVE BIT LOADING IN A MULTIPLE ANTENNA ORTHOGONAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATION SYSTEM - An embodiment of the present invention provides a method of supporting multiple protocols in a wireless network operating according to an Institute for Electronic and Electrical Engineers IEEE) 802.16 standard, comprising adding a new convergence sub layer (CS) type in which an extra field is added to an 802.16 service data unit (SDU) to indicate which higher layer protocol is carried in a 802.16 SDU payload.08-05-2010
20100067411Wireless Access Method And Apparatus - A wireless access method includes connecting a wireless base station and a plurality of wireless terminals using a first communication carrier and a second communication carrier in a hybrid-duplex manner; allocating uplink data of a real-time service to the first communication carrier; allocating uplink data of a non-real-time service to the second communication carrier; allocating downlink data of the real-time service to one of the first communication carrier and the second communication carrier; and allocating downlink data of the non-real-time service to the first and second communication carriers.03-18-2010
20110261728CHANNEL RESERVATION IN TIME DIVISION DUPLEX WIRELESS COMMUNICATION SYSTEM - Channel reservation in time division duplex for devices in systems involving, for example user devices and access points, may be accomplished using channel reservation request messages, such as request-to-send (RTS) messages and channel reservation grant messages, such as clear-to-send (CTS) messages. A method for channel reservation may include preparing a frame including at least one channel reservation request message and at least one channel reservation grant message. The preparing may include multiplexing the at least one channel reservation request message and the at least one channel reservation grant message at least by frequency-division multiplexing. The method may also include transmitting the frame from a first node to a second node, wherein the channel reservation request message and the channel reservation grant message relate to communications between the first node and the second node.10-27-2011
20110188414SIGNAL TRANSMISSION METHOD AND FRAME STRUCTURE ADOPTED IN A TDD SYSTEM - A signal transmission method in a Time Division Duplex (TDD) system is disclosed. The method comprises following steps: within a time length of a half-frame of a radio frame, base station transmits signal on a downlink special time slot, thereafter does not transmit signal on a Guard Period (GP), and then receives signal on an uplink special time slot; all time lengths of other uplink or downlink normal time slots for transmitting signal are equal; the total time length of the downlink special time slot, the guard period and the uplink special time slot is integer times of the time length of an uplink or downlink normal time slot. In addition, a frame structure adopted in the TDD system which corresponds to the method is disclosed. The present invention makes it flexible to set the duration of the GP and it is guaranteed that, even if a synchronization signal adopts power promotion, it will not bring great interference to uplink reception of other base stations; in addition, the utilization efficiency of the system is improved.08-04-2011
20110149814METHOD FOR TRANSMITTING TDD FRAMES WITH INCREASED DATA PAYLOAD - Method for transmitting through a bidirectional communication channel at least one conventional frame (CVFR) split into time slots SLI (for j=1 to L) separated from each other by guard intervals G, each time slot SLI being allocated either to a first or to a second direction of communication uplink (UL) or downlink (DL) offered by the bidirectional communication channel. The method according to the invention includes: detecting at least two successive time slots SLj, SLm+1, SLj+2 allocated to a same direction of communication DL, and inserting data in the guard interval separating such successive time slots SLj, SLj+1, SLj+2.06-23-2011
20110051633METHOD AND APPARATUS FOR IMPLEMENTING INDICATION OF UPLINK TRANSMISSION TIMING ADVANCE - The present invention provides a method for implementing uplink transmission TA. The method includes: receiving, by a UE, a TA command, adding a TA value corresponding to the TA command and a pre-configured TA adjusting offset to obtain a practical uplink transmission timing advance TA′; and transmitting, by the UE, uplink data according to the TA′. The present invention also provides another method for implementing uplink transmission TA. Compared with the prior art, in the methods provided by the present invention, a TA adjustment indicating table is respectively configured in the eNodeB and the UE, and some items of the TA adjustment indicating table are commonly-used by a TDD system and an FDD system. The present invention also provides apparatuses for implementing uplink transmission TA. The present invention provides detailed solutions for implementing uplink transmission TA in the TDD system and achieves coherence between the designs of the TDD system and the FDD system to the largest extent.03-03-2011
20110051632APPARATUS AND METHOD FOR TRANSCEIVING SIGNALS USING FRAME STRUCTURE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transceiving signals using a predetermined frame structure in a wireless communication system is provided. The apparatus includes a Radio Frequency (RF) unit for transceiving a signal through a frame according to the predetermined frame structure. The frame includes 5 subframes, the 5 subframe comprise type-1 subframes including 6 Orthogonal Frequency Division Multiplex Access (OFDMA) symbols and type-2 subframes including 7 OFDMA symbols, and a Cyclic Prefix (CP) length of the frame corresponds to ⅛ of an effective symbol length.03-03-2011
20110051631Method and Device for Processing Data Blocks and Communication System Comprising Such Device - A method and a device for processing data blocks are provided, wherein each resource unit includes at least two portions of user data, wherein each portion of user data is associated with a user; and wherein subsequent resource units include different combinations of portions of user data. Furthermore, a communication system is provided comprising such a device.03-03-2011
20110216675Relay Transmission Method and Apparatus - A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S09-08-2011
20080247337Method and Apparatus for Joint Detection in Downlink Tdd Cdma - A method and apparatus for implementing downlink JD (Joint Detection) in TDD CDMA communication systems, wherein the steps to be executed in the UE comprises: receiving downlink signals from a network system in a specific timeslot; acquiring the active primary and secondary channelisation codes in the specific timeslot, through processing the downlink signal; acquiring the initial ACC (Active Channelisation Codes) information for use in implementing JD in the next frame, through implementing a JD algorithm on the downlink signal by using the primary and secondary channelisation codes. An ACC dedicated channel is sent on the FPACH, carrying information relative to the use of secondary channelisation codes.10-09-2008
20110075594Uplink Power Control in a TDD Communication System - A method performed in a wireless network includes receiving signals within a downlink frequency domain to enable channel estimation and measuring two or more signals only for two or more frequency bands of the downlink frequency domain that correspond to two or more uplink frequency bands associated with a scheduling grant or channel allocation that correspond to physical uplink channel frequency bands. The method also includes calculating path loss values for each of the frequency bands and calculating a total power based on the path loss values corresponding to the frequency bands. The method further includes determining a power allocation per frequency band based on the calculated total power to be applied to an uplink transmission and allocating the total power.03-31-2011
20120147793System and Method for the Coexistence of Multiple Communications Systems - A method for enabling a coexistence of multiple communications systems includes locating a gap in a first frame structure of a first communications protocol used in a first communications system, and shifting a second frame structure of a second communications protocol used in a second communications system into alignment with the gap to inhibit interference between simultaneous transmissions of the first communications system and the second communications system. The method also includes transmitting the shifted second frame structure to a communications device in the second communications system.06-14-2012
20120307692WIRELESS COMMUNICATION SYSTEM - A wireless communication system broadcasts a control signal at a first frequency band from a base station and allocates additional frequency band(s) for transmitting data via terminal(s). A control signal at the first frequency band indicates the location of the additional frequency band(s) and is not transmitted over the additional frequency band(s). Wireless data transmission is simultaneously performed over the first frequency band and the additional frequency band(s). Each terminal receives the control signal, which is used in time-synchronizing frames between the wireless data transmission at the first frequency band and the wireless data transmission at the additional frequency band(s). The control signal also includes control data for managing wireless data transmission between the base station and the terminal(s) at the first frequency band, and is utilized instead of a control signal at the additional frequency band(s).12-06-2012
20120307689APPARATUS AND METHOD FOR DEFINING PHYSICAL CHANNEL TRANSMIT/RECEIVE TIMINGS AND RESOURCE ALLOCATION IN TDD COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A method of defining physical channel transmit/receiving timings and resource allocation is provided for use in a Time Division Duplex (TDD) communication system supporting carrier aggregation. A method for receiving, at a base station, a Hybrid Automatic Repeat Request (HARQ) acknowledgement from a terminal in a Time Division Duplex (TDD) system supporting carrier aggregation of a primary cell and at least one secondary cell includes transmitting a downlink physical channel through one of the primary and secondary cells, receiving the HARQ acknowledgement corresponding to the downlink physical channel of the primary cell at a first timing predetermined for the primary cell, and receiving the HARQ acknowledgement corresponding to the downlink physical channel of the secondary cell at second timing, wherein the second timing is determined according to the first timing.12-06-2012
20120307694RELAY FRAME STRUCTURE FOR SUPPORTING TRANSPARENT AND BIDIRECTIONAL RELAYS - A method for transmitting data includes receiving at a first relay station first data from a parent station during a downlink period comprising a plurality of downlink zones. A network coding zone is one of the plurality of downlink zones and is located at an end of the downlink period, and the first data is received in at least one of the plurality of downlink zones other than the network coding zone. The method further includes receiving at the first relay station from a child station, second data during an uplink zone, and transmitting third data by the first relay station to the child station, during the network coding zone using a resource. The method further includes transmitting the third data to the parent station, during the network coding zone, using the resource. The third data results from the first data being effectively logically XOR-ed to the second data.12-06-2012
20120307690DATA TRANSMISSION METHOD AND BASE STATION - Embodiments of the present disclosure disclose a data transmission method which includes: sending, by an REC, a first part of downlink data of a downlink period to an RE before the downlink period arrives; sending, by the REC, a second part of the downlink data of the downlink period to the RE in the downlink period, where the second part and the first part constitute all downlink data of the downlink period; receiving, by the RE, the first part and the second part of the downlink data of the downlink period; and sending, by the RE, the first part and the second part as the downlink data through an air interface in the downlink period. Accordingly, the embodiments of the present disclosure also disclose a base station which can effectively improve utilization of transmission bandwidth of a CPRI interface and utilization of spectrum resources of the air interface.12-06-2012
20120307693RELAY FRAME STRUCTURE FOR SUPPORTING TRANSPARENT AND BIDIRECTIONAL RELAYS - A method for transmitting data includes receiving at a first relay station first data from a parent station during a downlink period comprising a plurality of downlink zones. A network coding zone is one of the plurality of downlink zones and is located at an end of the downlink period, and the first data is received in at least one of the plurality of downlink zones other than the network coding zone. The method further includes receiving at the first relay station from a child station, second data during an uplink zone, and transmitting third data by the first relay station to the child station, during the network coding zone using a resource. The method further includes transmitting the third data to the parent station, during the network coding zone, using the resource. The third data results from the first data being effectively logically XOR-ed to the second data.12-06-2012
20090279459Cell Specific Sounding Reference Signal Sub-Frame Configuration - A method of wireless communication including a plurality of fixed base stations and a plurality of mobile user equipment with each base station transmitting to any user equipment within a corresponding cell a sounding reference signal sub-frame configuration indicating sub-frames when sounding is permitted. Each user equipment recognizes the sounding reference signal sub-frame configuration and sounds only at permitted sub-frames. Differing cells may have differing sounding reference signal sub-frame configurations. There are numerous manners to encode the transmitted information.11-12-2009
20120099491METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK INFORMATION IN MULTICARRIER-SUPPORTING WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting ACK/NACK information in a multicarrier-supporting wireless communication system are disclosed. A method for allowing a user equipment to transmit ACK/NACK information in a multicarrier-supporting wireless communication system includes generating individual ACK/NACK information in association with individual codewords received from a base station through N carriers (where N≧2) for use in M downlink subframes (where M≧2), performing, if the sum of numbers of bits of the individual ACK/NACK information exceeds a predetermined payload size and M is not set to 04-26-2012
20120099489SYSTEMS, APPARATUS AND METHODS FOR FACILITATING FREQUENCY REUSE FOR DOWNLINK CONTROL CHANNELS - Systems and methods for frequency reuse on downlink control channels (DLCCs) are provided. One method can include determining a first number of symbols to support transmission of control information on a DLCC, and configuring a second number of symbols for transmission of the control information on the DLCC, wherein the second number of symbols is greater than the first number of symbols. The method can also include assigning a number of DLCCs based on the second number of symbols, and transmitting control information over an assigned number of DLCCs to achieve an effective reuse factor less than one. Another method can include identifying fractions of bandwidth in a system having cells, and allocating at least one of the cells to at least one of the fractions of bandwidth in a system. Resource element groups allocated to the fractions of bandwidth can be coordinated across cells to provide frequency reuse.04-26-2012
20100226293INTERFERENCE ALIGNMENT SCHEME FOR USE IN COMMUNICATION NETWORK - A communication network applying an interference alignment scheme with a low or reduced complexity is provided. The communication network may include a plurality of transmit nodes and a plurality of receive nodes. A plurality of combinations of transmit-receive pairs may exist between the plurality of transmit nodes and the plurality of receive nodes. A communication apparatus for the communication network may select, from candidate combinations of transmit-receive pairs, a target combination to be applied with the interference alignment scheme. In particular, the communication apparatus may sequentially decrease a number of candidate combinations to select the target combination with a low complexity.09-09-2010
20120039221METHOD FOR TRANSMITTING SIGNAL USING A FRAME OF A PREDETERMINED CYCLIC PREFIX LENGTH IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal using a frame having a predetermined cyclic prefix (CP) in a wireless communication system is disclosed. The method for transmitting a signal using a frame having a predetermined cyclic prefix (CP) length in a wireless communication system that supports a plurality of cells comprises receiving the signal using a first frame from a base station; and transmitting the signal to the base station using the first frame, wherein the first frame is supported by a first cell of the plurality of cells and is different from a second frame supported by a second cell of the plurality of cells, the first frame has a structure where a overlap region between an uplink region of the first frame and a downlink region of the second frame or an overlap region between a downlink region of the first frame and an uplink region of the second frame is punctured, and a CP length of the first frame is different from that of the second frame.02-16-2012
20120147794CHANNEL STATUS INFORMATION FEEDBACK METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM WITH RELAY STATION - The present invention relates to a wireless communication system, and more particularly, to a channel status information feedback method and apparatus in a wireless communication system with a relay station. The method for transmitting channel status information according to one embodiment of the present invention comprises: receiving a backhaul downlink signal from a base station; generating channel status information based on the backhaul downlink signal; and transmitting the channel status information via a backhaul uplink subframe, wherein the backhaul uplink subframe to which the channel status information is transmitted can be determined based on a subframe index without a designated backhaul downlink subframe and a backhaul uplink transmission timing relation.06-14-2012
20120099490REPEATER AND METHOD FOR OPERATING SUCH A REPEATER - A repeater capable of emitting as little electromagnetic radiation as possible is described. The repeater can transmit communication signals between a base station and a network terminal in a radio transmission network, such as a mobile radio network. The repeater can include a transmitter that can transmit the communication signals as a radio signal to the network terminal. The repeater can also include a sensor for detecting a switching signal and a control unit that can change the transmitter between a passive operating state and an active operating state based on the switching signal. The transmission power of the transmitter can be lower in the passive operating state than in the active operating state.04-26-2012
20090201838DYNAMIC ADJUSTMENT OF DOWNLINK/UPLINK ALLOCATION RATIO IN TDD WIRELESS SYSTEMS - Techniques, apparatuses, and systems for dynamically changing downlink and uplink allocations can include operating a base station under time division duplexing to communicate with one or more mobile devices using a frame structure, adjusting a downlink-uplink ratio to change an allocation between uplink and downlink data capacities in the frame structure, determining a mute interval based on the adjusted downlink-uplink ratio, generating mute information based on the mute interval to identify the one or more areas of the frame structure effected by the allocation change, and transmitting the mute information to the one or more mobile devices.08-13-2009
20110064007METHODS AND APPARATUS FOR INCLUDING MODE INFORMATION IN A FRAME FOR SYSTEM ACQUISITION - Methods and apparatus for including mode information in a wireless transmission frame, which is useful for system acquisition. In particular, a first information bit is provided in a preamble of a transmission frame, where the bit is configured to indicate that a wireless communication system is operating according to either a time division duplex (TDD) mode or a frequency division duplex (FDD) mode. The addition of a single bit minimally affects the resources of the preamble. Additionally, another bit resource already present in the preamble for normally communicating whether FDD transmissions are full duplex or half-duplex transmissions, may be further allocated to indicate partitioning information concerning TDD mode transmissions when the first bit indicates TDD mode, thus affording additional information communicated in the frame without increasing preamble resources.03-17-2011
20110317596OPTIMIZED SIGNALING OF DEMODULATION REFERENCE SIGNAL PATTERNS - Orthogonality in cyclic shift (CS) and orthogonal cover code (OCC) selection for DMRS in MIMO is improved by new n12-29-2011
20120113876METHOD AND AN APPARATUS FOR ALLOCATING AN ACK/NACK CHANNEL - A method for allocating an Acknowledgement/Negative Acknowledgement (ACK/NACK) channel by a Base Station (BS) in a Frequency Division Duplexing (FDD) system is provided. The method includes allocating downlink resources in one or more cells to a User Equipment (UE), transmitting, Physical Downlink Control Channel (PDCCH) information and downlink data using the downlink resources, allocating at least four ACK/NACK channels to the UE, receiving ACK/NACK information for the PDCCH information and the downlink data fed back by using two antennas from the UE, and performing re-transmission or transmitting new data according to the ACK/NACK information, wherein at least two of the at least four ACK/NACK channels are the same as at least two ACK/NACK channels allocated by the BS in a mode not using a Spatial Orthogonal Resource Transmit Diversity (SORTD) scheme, and the at least two of the at least four ACK/NACK channels are allocated to different antennas.05-10-2012
20120113875METHOD AND APPARATUS FOR DYNAMICALLY MODIFYING A TRANSMISSION FRAME - An approach for dynamically modifying a transmission frame. A logic determines whether to modify a configuration of a transmission frame, including a time division duplex frame structure, for transmission over a cell and modifies the configuration of the transmission frame for transmission over the cell based on the determination. A transceiver then signals the modified configuration to a user equipment configured within the cell.05-10-2012
20120014296METHOD FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting and receiving data in a wireless communication system. The method of transmitting data in a wireless communication system according to an embodiment of the present invention supports time division duplex (TDD), and a base station transmits data to a terminal through a first sub-frame of a first frame and receives a confirmatory response to the data through a second sub-frame of a second frame. The second frame is determined according to hybrid automatic retransmit request (HARQ) processing latency which is the minimal required time from the reception of the data to the transmission of the confirmatory response by the first frame and the terminal. The second sub-frame is determined according to both the first sub-frame and the numbers of the downlink and uplink sub-frames of the first frame, wherein the downlink and uplink sub-frames are respectively used in the HARQ operation.01-19-2012
20120155338METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN TIME DIVISION DUPLEX SYSTEM - A method and apparatus of transmitting a reference signal in a time division duplex (TDD) system is provided. A base station (BS) generates a plurality of demodulation reference signals (DMRSs) for respective layers, maps the plurality of DMRSs to a downlink pilot time slot (DwPTS) region for downlink transmission within a special subframe; and transmits the plurality of DMRSs through a plurality of antennas. The special subframe is a subframe for separating uplink and downlink between an uplink (UL) subframe and a downlink (DL) subframe within a frame.06-21-2012
20120026920METHOD OF COMMUNICATION USING FRAME - A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.02-02-2012
20130010660Method for Implicit Conveying of Uplink Feedback Information - Method and apparatus for conveying feedback reports from a data receiving party (01-10-2013
20130010659SOUNDING REFERENCE SIGNALS IN ASYMMETRIC CARRIER AGGREGATION - Sounding reference signal (SRS) transmission is disclosed for asymmetric carrier aggregation, where the carrier aggregation occurs using multiple component carriers that include both paired and at least one non-paired component carrier. A user equipment (UE) determines whether to transmit SRS over at least one of the non-paired component carriers. The UE transmits the SRS over the non-paired component carrier when the determination is made. The UE maintains a single component carrier transmission at a time with a single carrier waveform SRS transmission by transmitting the SRS on a different component carrier at different subframes.01-10-2013
20130010658Method and system for implementing synchronization among micro base stations - The present disclosure provides a method and system for implementing synchronization among micro-base stations, including: a micro-base station intercepts a wireless reference signal of an air interface, and selects a synchronization reference object according to an intercepted wireless reference signal; and the micro-base station implements synchronization processing through detecting the wireless reference signal of the selected synchronization reference object, and adjusts its own synchronization information. The method for implementing synchronization among micro-base stations disclosed in the present disclosure is implemented on the basis of the wireless air interface signals of the micro-base stations, requires no additional synchronization hardware devices (such as Global Positioning Satellite (GPS) receiving apparatus, etc.) and has low cost. By the solution disclosed in the present disclosure, the mutual interference caused by asynchronization between a Time Division Duplex (TDD) micro-base station and other base stations is eliminated flexibly.01-10-2013
20090135746SYSTEM AND METHOD FOR COMMUNICATING OVER A WIRELES TIME-DIVISION DUPLEX CHANNEL - According to the present invention, the bandwidth of a TDD channel is increased where multiple slave devices communicate with a master device over the channel. According to an aspect of the present invention, the master device can increase channel bandwidth by utilizing available transmit slots that occur during receipt of a multi-slot packet from a slave device. For example, the master device receives a first packet at a first frequency from a first slave via the channel. The master determines whether the first packet is a multi-slot packet, and if so, transmits a second packet to a second slave via the channel at a second frequency different from the first frequency. The second packet is transmitted after receipt of the first packet, but prior to the end of the first packet.05-28-2009
20120155337METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for allocating resources for transmitting an HARQ ACK/NACK signal for a downlink subframe using a PUCCH format 3 in a time division duplex (TDD) system using a single carrier are provided. Since the resources are allocated through a resource indicator transmitted using a power control field transmitted on a PDCCH of the downlink subframe, the resources for transmitting the HARQ ACK/NACK signal may be allocated by effectively using resources allocated to a duplicately transferred control signal.06-21-2012
20120155340APPARATUS AND METHOD FOR COMMUNICATING USER EQUIPMENT SPECIFIC INFORMATION IN CELLULAR COMMUNICATION SYSTEM - A cellular communication system includes a base station and a plurality of user equipment (UE). The base station includes a combine processor which combines user equipment specific information, such as power control commands or synchronisation information, for a plurality of user equipment. An encode processor encodes the combined user equipment specific information and a transceiver transmits the combined user equipment specific information in a minimum transmission resource unit of the cellular communication system. The minimum transmission resource unit may be a single channelization code in a single time slot.06-21-2012
20120155339APPARATUS AND METHOD FOR COMMUNICATING USER EQUIPMENT SPECIFIC INFORMATION IN CELLULAR COMMUNICATION SYSTEM - A cellular communication system includes a base station and a plurality of user equipment (UE). The base station includes a combine processor which combines user equipment specific information, such as power control commands or synchronisation information, for a plurality of user equipment. An encode processor encodes the combined user equipment specific information and a transceiver transmits the combined user equipment specific information in a minimum transmission resource unit of the cellular communication system. The minimum transmission resource unit may be a single channelisation code in a single time slot.06-21-2012
20120300681DYNAMIC TDD DATA CHANNEL TRANSMISSION METHOD AND APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - A data channel transmission method and apparatus is provided for the wireless communication system operating in a dynamic Time Division Duplex (TDD) mode. The dynamic TDD data channel transmission method and apparatus herein optimizes system performance in adaptation to the variation of the uplink and downlink traffic, and configures the radio frame such that all of the subframes have a static region, thereby operating along with other terminals without compromising channel estimation performance.11-29-2012
20110090825TRANSMISSION DIVERSITY AND MULTIPLEXING FOR HARQ-ACK SIGNALS IN COMMUNICATION SYSTEMS - A method and apparatus are described for a User Equipment (UE) to transmit in a control channel ACKnowledgement signals associated with a Hybrid Automatic Repeat reQuest process (HARQ-ACK signals) in response to receiving Transport Blocks (TBs) transmitted from a base station. The UE conveys the HARQ-ACK information by selecting one resource from multiple resources in the control channel and by selecting a constellation point of the modulation scheme for the HARQ-ACK signal. Transmission diversity is supported using different control channel resources that are already available to the UE without configuring additional resources. Design principles are described to optimally map the HARQ-ACK information to control channel resources and modulation constellation points for a Time Division Duplex (TDD) system and for a Frequency Division Duplex (FDD) system.04-21-2011
20110103272METHOD FOR TRANSMITTING THE PDCCH SIGNAL - The present invention provides a method for transmitting a PDCCH (physical downlink control channel) signal, when the number of available resource blocks of the downlink bandwidth in a radio frame is less than or equal to k, 2 symbols are fixedly used to transmit the physical downlink control channel, wherein k is a natural number. The present invention further provides another method for transmitting a PDCCH signal. In a TDD Long Term Evolution system, when the number of available resource blocks of the downlink bandwidth in a radio frame is less than or equal to k and the uplink/downlink switching period is 10 ms, the transmitting end selects 2, 3 or 4 symbols to transmit the PDCCH signal in subframe 05-05-2011
20110103271CALIBRATION APPARATUS AND METHOD FOR MULTICELL MULTIPLE INPUT MULTIPLE OUTPUT TRANSMISSION IN MULTIPLE ANTENNA SYSTEM - A calibration apparatus and a calibration method for multicell Multiple Input Multiple Output (MIMO) transmission in a multiple antenna system are provided. More particularly, an operating method of a Mobile Station (MS) for performing calibration for multicell MIMO transmission in a multiple antenna system includes negotiating a multi-Base Station (BS) joint processing with a BS, receiving a control message including information instructing multi-BS calibration for sounding based on the multi-BS joint processing, from the BS; when receiving the control message involving the multi-BS joint processing, generating a second sounding sequence by mapping estimated phases of downlink channels per subcarrier of BSs to a first sounding sequence allocated from the BS, and transmitting the second sounding sequence, including the phases of the downlink channels per subcarrier, over a sounding symbol interval with respect to each of the BSs involving the multi-BS joint processing. Hence, feedback overhead in the calibration of the multicell MIMO transmission can be reduced.05-05-2011
20120250590WIRELESS COMMUNICATION DEVICE WITH BOTH A WIRELESS TRANSCEIVER AND A WIRELESS PAGING RECEIVER - A wireless communication device receives a first user instruction to execute a first application requiring first wireless communications. The device selects a first wireless protocol for the first wireless communications based on the first application. A transceiver in the device exchanges the first wireless communications with a first wireless communication access node using the first wireless protocol and monitors a first paging channel of the first wireless protocol. A paging receiver monitors a second paging channel of a second wireless protocol in response to the application-based selection of the first wireless protocol.10-04-2012
20120250589TIME DOMAIN SIGNAL GENERATION - Embodiments of apparatuses, articles, methods, and systems for efficient generation of a time domain signal in multi-carrier communications are generally described herein. Other embodiments may be described and claimed.10-04-2012
20100290372METHOD FOR MULTIPLE TDD SYSTEMS COEXISTENCE - The method for multiple TDD systems coexistence comprising steps of: a newly deployed system calculating a relative time offset Δt for a corresponding frame; the newly deployed system transmitting uplink and downlink signals based on a time reference information obtained by a summation of the relative time offset Δt and a time reference of an existing system. With the method proposed in present invention, uplink and downlink interference from adjacent frequency bands and from adjacent carriers in the same frequency band can be greatly reduced and a transmission time utility can be guaranteed for a newly deployed system.11-18-2010
20100290371Arrangement and Method for Channel Mapping in a Wireless Communication System - An arrangement and method for channel mapping in a UTRA TDD HSDPA wireless communication system by applying interleaving functions in first (11-18-2010
20100290370METHOD AND APPARATUS FOR SCHEDULING RESOURCES BETWEEN DIFFERENT TDD SYSTEMS - A method and an apparatus for scheduling resources between a first TDD system and a second TDD system are disclosed, frames required for transmission by the first TDD system including a preamble sequence, an up-link subframe and a down-link subframe, the method comprises steps of allocating time and frequency resources for the first TDD system and the second TDD system based on service parameters of the first TDD system and service parameters of the second TDD system, and mapping the coded modulation data stream of the first TDD system and the second TDD system onto corresponding allocated time and frequency resources. According to the method and apparatus of the present invention, not only the latency of the traffic service, control signaling and the feedback transmission over the air interface can be reduced, but the compatibility requirement for existing system can also be reached. Moreover, resource allocation can be performed between different systems based on respective service loads.11-18-2010
20110128896SEMI-PERSISTENT SCHEDULING METHOD - A semi-persistent scheduling method is provided in the present disclosure, and the method comprises: when a semi-persistent scheduling periodicity comes, an evolved node B (eNB) and a terminal (UE) select a sub-frame in a sub-frame group as a sub-frame for current semi-persistent scheduling; the sub-frame group includes multiple sub-frames, and a sub-frame group periodicity equals to the semi-persistent scheduling periodicity. The problem that the sub-frames with the same relative position in different sub-frame groups are the sub-frames in which the collision between the initial transmission and the retransmission of the HARQ data packet most possibly occurs is considered by the technical solution of the present disclosure, so the purpose that prolonging the interval length of the collision between the initial transmission of the HARQ and the retransmission of the HARQ and reducing the collision between the initial transmission of the HARQ and the retransmission of the HARQ is achieved by reasonably configuring the number of sub-frames in a sub-frame group and alternately using different sub-frames in the sub-frame group.06-02-2011
20120314628METHOD AND SYSTEM FOR TRANSFERRING WIRELESS TRANSMIT/RECEIVE UNIT-SPECIFIC INFORMATION - The present invention is related to a method and system for transferring wireless transmit/receive unit (WTRU)-specific information to support enhanced uplink (EU) operation in a wireless communication system. A radio network controller (RNC) obtains WTRU-specific information, and transfers the WTRU-specific information to the Node-Bs. Each Node-B is configured to schedule uplink transmissions from a WTRU and utilizes the WTRU-specific information in operation of EU transmissions.12-13-2012
20120314627METHOD OF TRANSMITTING SCHEDULING INFORMATION IN TDD SYSTEM - A method of transmitting scheduling information in time-division-duplex (TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe.12-13-2012
20120314626CONCURRENT MULTI-BAND TRANSMITTER ARCHITECTURE - This invention describes a hardware and software architecture for concurrent dual-band or multi-band operation. More specifically this invention describes a multi-band cognitive radio network that allows terminals to efficiently use signal processing and RF resources by synchronizing the framing in multiple frequency bands. The invention is useful in TDMA systems by allowing efficient use of signal processing resources.12-13-2012
20120134305HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK TRANSMISSION IN A MULTI COMPONENT-CARRIER COMMUNICATION SYSTEM - Methods, systems, devices, and computer program products are described which facilitate the transmission and reception of acknowledgment/negative acknowledgment (ACK/NACK) feedback associated with downlink data transmissions in a multi-carrier wireless communication system. Scheduling request resources may be utilized to enable the transmission of ACK/NACK feedback for the multiple component carriers when a positive scheduling request is present and the techniques described may be utilized to improve the efficiency of control channel signaling in different system configurations.05-31-2012
20120163253TDD BASE STATION FOR CODE GROUP SYNCHRONIZATION - A time division duplex (TDD) base station having a code group out of N code groups includes circuitry configured to transmit a primary synchronization code along with a plurality of secondary synchronization codes. The plurality of synchronization codes are quadrature phase shift keying modulated and number less than (log06-28-2012
20120163252METHOD FOR HARQ AND LINK ADAPTATION OF DEVICE TO DEVICE LINK IN DIRECT COMMUNICATION BETWEEN USER EQUIPMENTS AND RELAYING BY USER EQUIPMENT - Provided is a method of processing hybrid automatic repeat request (HARQ) and adaptive transmission of a device-to-device (D2D) link. In the method, an operation method of user equipment (UE) includes (a) receiving an initial transmission mode (TM) and transmission power for the D2D link from a base station, and performing data transmission through the D2D link, (b) determining, at the UE, a TM and transmission power of a succeeding subframe, or receiving a TM control value and a transmission power control value from counterpart UE of the D2D link and determining the TM and the transmission power of the succeeding subframe, and (c) performing the data transmission to the counterpart UE using the determined TM and transmission power. Here, (b) and (c) are repeated.06-28-2012
20120163251DYNAMIC PACKET SCHEDULING METHOD, APPARATUS AND COMPUTER PROGRAM - A dynamic packet scheduling method in a cellular OFDMA-TDD network. The method includes the following steps: obtaining at least one PHY based index defining a preferred allocation of a mobile station among at least two frequency reuse zones in a cell of said communication network; and scheduling bursts of packets to transmit to the mobile station, by at least one frequency reuse zone among the at least two frequency reuse zones, in view of transmission requests and the at least one PHY based index.06-28-2012
20120163250System Synchronization in TD-SCDMA and TDD-LTE Systems - Certain aspects of the present disclosure propose techniques for synchronizing TD-SCDMA and TDD-LTE systems. Certain aspects provide a method that generally includes obtaining, from a base station (BS) of a first radio access technology (RAT), timing and a system frame number (SFN) for a BS of a second RAT, and performing network acquisition operations with the BS of the second RAT using the timing and the SFN.06-28-2012
20120163249System and Method of Improving Redirection in a TD-SCDMA Circuit-Switched Fallback from TDD-LTE Systems - Certain aspects of the present disclosure propose techniques for improving redirection in a TD-SCDMA circuit-switched fallback from TDD-LTE systems. Certain aspects provide a method that generally includes initiating a call setup (CS) procedure for leaving a base station (BS) of a first radio access technology (RAT) for a call on a second RAT, receiving, in response to the CS procedure, a message from the BS of the first RAT comprising a system frame number (SFN) for the BS of the first RAT and an offset number for a BS of the second RAT for setting up the call, and generating an estimated SFN for the BS of the second RAT based on the SFN for the BS of the first RAT and the offset number.06-28-2012
20090059819SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING SIGNAL IN A COMMUNICATION SYSTEM - A system and method for transmitting and receiving signals in a communication system are provided, in which a BS communicates with a first MS located within an inner area of a cell during first and second time periods in TDD and communicates with a second MS located within an outer area of the cell during the first time period in FDD, and an RS detects signals transmitted between the BS and the second MS during the first time period and transmits the detected signals simultaneously to the BS and the second MS during the second time period.03-05-2009
20120250592COMMUNICATION METHOD AND APPARATUS BETWEEN A TERMINAL AND A BASE STATION VIA A FRAME IN A COMMUNICATION SYSTEM INCLUDING A RELAY STATION - The present invention provides an embodiment of a method and system for applying a hybrid automatic repeat request (HARQ) scheme to a system employing a relay station. According to one embodiment of the present invention, a frame including an access zone and a relay zone can be configured based on the HARQ timing which can be calculated based on the structure of the access zone and relay zone. Also, according to one embodiment of the present invention, the structure of the access zone and relay zone can be determined by multiplexing communication systems that support two kinds of systems different from each other. According to one embodiment of the present invention, the HARQ scheme can be applied even to a frame including an access zone and a relay zone, by calculating the HARQ timing.10-04-2012
20100061280Synchronizing signal extraction circuit for tdd system and method of the signal extraction - The present invention relates to a technology applied to mobile communication, and more particularly to a circuit of extracting a synchronizing signal from a received signal for retransmitting the received signal in synchronization with the synchronizing signal in a repeater of a TDD system, etc. The circuit generates the synchronizing signal in a phase locked to a phase of the received signal and outputs the synchronizing signal through a signal extractor. A synchronizing signal extraction circuit according to example embodiments of the present invention includes a band pass filter 03-11-2010
20120213131WIRELESS COMMUNICATION APPARATUS - Wireless communication apparatus adopting a time division duplex system for transmission and reception using plural antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means detects channel information based on reception output of N reception circuits having a one-to-one correspondence with N antennas. Correction value detection means finds a correction value for correcting deviation occurring between each of N transmission circuits and each of the N reception circuits based on the channel information. A wireless communication apparatus transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means of the wireless communication apparatus detects the correction value using the correction signal.08-23-2012
20120213130CARRIER AGGREGATION FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE ENHANCEMENT - Carrier aggregation to enhance Evolved Multimedia Broadcast Multicast Service (eMBMS) includes transmitting unicast signaling for a unicast service on an anchor carrier to mobile entities, transmitting eMBMS signaling on a second carrier different from the anchor carrier to the mobile entities for use with the unicast signaling, and various techniques for practical application of carrier aggregation for eMBMS enhancement. In addition, allocating subframes used for MBMS on a Single Frequency Network (MBSFN) includes allocating at least a portion of one or more subframes otherwise reserved for unicast subframes on a mixed carrier to provide an increased allocation of subframes carrying MBSFN information, transmitting MBSFN signals on the increased allocation of subframes, and more detailed aspects.08-23-2012
20120213129METHOD AND APPARATUS FOR ACTIVATING OR DEACTIVATING SECONDARY CARRIERS IN TIME DIVISION DUPLEX MOBILE COMMUNICATION SYSTEM USING CARRIER AGGREGATION - A method and an apparatus for activating or deactivating a primary carrier and secondary carriers in a Time Division Duplex Long Term Evolution (TDD LTE) system using carrier aggregation are provided. An apparatus includes an User Equipment employing the method corresponding the operation associated with the activation and deactivation of SCells, which thereby performs communication with eNBs without errors.08-23-2012
20100278080TRANSMISSION METHOD AND DEVICE IN LONG TERM EVOLUTION TIME DIVISION DUPLEX SYSTEM - A transmission method in a Long Term Evolution time division duplex system can carry out reconfiguration for half-frame structures. According to the coverage range requirements of the system, it performs flexible configuration of the number of special time slot areas and the downlink pilot time slots, guard intervals or uplink pilot time slots included therein, and so can support different coverage ranges. A base station and user terminal using above method in the Long Term Evolution time division duplex system.11-04-2010
20120314629CHANNEL QUALITY INDICATOR METHOD, AND ASSOCIATED SYSTEM, BASE STATION, AND USER EQUIPMENT - It would be to provide a method which will work with future versions of LTE-A, be backwards compatible and alleviate interference to signals for basic system operation.12-13-2012
20100271988Hybrid-QRD-SIC and Imbalanced MCS System and Method for MIMO - A method and system for multiple input, multiple output (MIMO) detection and channel decoding comprising: decomposing a channel complex gain matrix into a unitary matrix and an upper right hand triangular matrix; providing a received signal to a complex conjugate transpose of the unitary matrix, thereby creating a plurality of signals; normalizing a last of the plurality of signals; channel decoding the normalized last of the plurality of signals, thereby recovering a last codeword signal; encoding the last codeword signal; utilizing the encoded last codeword signal to recover a second last codeword signal; and repeating the utilizing until all codeword signals are recovered. Also, a method and system for providing an imbalanced modulation and coding scheme for successive interference cancellation.10-28-2010
20100008267Radio Frequency Switch - Disclosed is a radio frequency (RF) switch including: a circulator having first to third nodes, which are connected to first to third ports, respectively; and a slot line pattern unit installed in a connection line between the third node of the circulator and the third port so as to carry out signal transmission or interception, wherein the slot line pattern unit includes a switching circuit, which is installed at a predetermined location so as to transmit or intercept a signal by maintaining or short-circuiting a gap of a slot line corresponding to the installed location according to an external switching control signal.01-14-2010
20120218921SCHEDULING METHOD, MS APPARATUS USING THE SCHEDULING METHOD, DATA TRANSMISSION METHOD, AND BS APPARATUS USING THE DATA TRANSMISSION METHOD IN A WIRELESS COMMUNICATION SYSTEM - The method for scheduling, at an MS, data transmission and reception of neighbor BSs adjacent to the MS in a wireless communication system includes receiving number information through a specific downlink channel in a first time unit from each of the neighbor BSs, determining, among the neighbor BSs, a BS which is to transmit and receive data in a second time unit, in a predefined rule, according to the number information and fairness information based on one or more of a number of MSs within a cell served by each of the neighbor BSs and a number of time units that each of the neighbor BSs used previously for data transmission and reception, and transmitting a signal indicating that data transmission and reception in the second time unit are not possible, to the other neighbor BSs excluding the determined BS among the neighbor BSs.08-30-2012
20120257552TRANSMISSION OF CONTROL INFORMATION FOR FDD-TDD CARRIER AGGREGATION - Techniques for transmitting control information to support communication on multiple component carriers (CCs) are disclosed. A user equipment (UE) may be configured for operation on multiple CCs. These CCs may be associated with control messages having different definitions. For example, a control message for a CC configured for frequency division duplex (FDD) may have a different definition than a control message for a CC configured for time division duplex (TDD). A base station may send first control information for a first CC based on a definition of a control message for a second CC, instead of a definition of a control message for the first CC. The control message for the second CC may be selected for use to send the first control information based on various designs.10-11-2012
20120257548ACTIVE CODE SELECTION FOR JOINT-DETECTION BASED TDSCDMA RECEIVER - A TD-SCDMA receiver includes a joint detector that receives an input signal from a transceiver. The joint detector analyzes the input signal to using an active code selection (ACS) to determine whether one or more neighboring cells are used in conjunction with a servicing cell. Also, the ACS assigns a first matrix that includes necessary active coded channels including those associated with the one or neighboring cells so as to formulate a channel matrix.10-11-2012
20120257554METHOD AND APPARATUS FOR DEFINING TRANSCEIVING TIMING OF A PHYSICAL CHANNEL IN A TDD COMMUNICATION SYSTEM WHICH SUPPORTS CROSS-CARRIER SCHEDULING - The present invention relates to a method for defining, in a TDD wireless communication system in which broadband is configured by means of carrier aggregation, transceiving timing for a data channel and a control channel when cross-carrier scheduling is implemented.10-11-2012
20120257553METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for transmitting a reference signal by a base station in a wireless communication system. The base station generates a channel state information (CSI) reference signal (RS) for each of a plurality of layers, performs mapping the plurality of CSI-RSs to a resource element set constituted by a plurality of resource elements(REs) in a subframe and transmits the subframe with the plurality of mapped CSI-RSs. The plurality of resource elements constituting the resource element set are resource elements that are arranged with constant subcarrier spacing in two neighboring orthogonal frequency division multiplexing (OFDM) symbols, and the subframe has an extended cyclic prefix (CP) structure including 12 OFDM symbols.10-11-2012
20120082070ENABLING COEXISTENCE BETWEEN WIRELESS NETWORKS - Systems and methods for detecting and mitigating interference between from a first wireless time division duplex (TDD) communications device and a second wireless TDD communications device includes processing quality-indicator reports received from the first TDD device to determine if reception at the first TDD device has experienced interference from the second TDD device. Such interference at the first TDD device may indicate that the first TDD device may also cause interference to reception at the second TDD device. Accordingly, to mitigate the possible interference from the first TDD device, an uplink configuration of the first TDD base station may be adjusted. The adjustment of the uplink configuration may include configuring reception of data packets at the first TDD base station from the first TDD device in accordance with an interference-free time interval, an unprotected time interval, or a specific portion of an associated frequency band.04-05-2012
20120082071System Compatibility Method and Apparatus - A system compatibility method and apparatus are disclosed. The system compatibility method includes sending, according to a downlink resource configured in a new frame structure of a first system, information of a downlink resource carrier. The information of the downlink resource carrier includes information of a downlink resource carrier compatible with a second system. Information of an uplink resource carrier is received according to an uplink resource configured in the new frame structure of the first system. The information of the uplink resource carrier includes information of an uplink resource carrier compatible with the second system.04-05-2012
20120082069Method and System for Time Division Duplexing (TDD) in a 60 GHZ Distributed Communication System - Methods and systems for antenna switching for time division duplexing (TDD) in a 60 GHz distributed communication system are disclosed and may include enabling one or more antenna configurations in one or more remote RF modules within a wireless communication device based on a measured signal characteristic. The RF modules may receive IF signals generated from baseband signals via one or more coaxial lines. TDD RF signals may be communicated via the antenna configurations with devices external to the wireless communication device. The IF signals may be tapped in the coaxial lines at taps coupled to the RF modules. The baseband signals may include video, streamed Internet, and/or data from a local data source. The TDD RF signals may be transmitted to a display device. Control signals for the RF devices may be communicated utilizing the coaxial lines.04-05-2012
20090016243WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A wireless communication device for transmitting/receiving data uses a plurality of carrier frequencies in a time division duplex scheme. The wireless communication device includes a scheduler for selecting a slot of at least one carrier frequency for transmission of the data; and transmission data assignment means for assigning the data to the slot of the carrier frequency selected by the scheduler and making a slot of a carrier frequency not selected by the scheduler empty.01-15-2009
20120320805METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information when TDD and a plurality of cells are configured, and comprises the following steps: receiving one or more of at least one PDCCH signal and at least one PDSCH signal; generating for each of the cells reception reply information on one or more of the at least one PDCCH signal and the at least one PDSCH signal; and transmitting the reception reply information for each of the plurality of cells which are connected.12-20-2012
20120230233CLOSED-LOOP MIMO SYSTEMS AND METHODS - Methods, devices and systems are provided for transmitting and receiving MIMO signals. In one embodiment, transmitting_of the MIMO signals involves pre-coding each of at least two data symbols using a respective pre-coding codeword to preclude a corresponding plurality of pre-coded data symbols. A respective signal is transmitted from each of a plurality of antennas, the respective signal including one of the pre-coded signals and at least one pilot for use in channel estimation. The signals collectively further include at least one beacon pilot vector consisting of a respective beacon pilot per antenna, the beacon pilot vector containing contents known to a receiver for use by the receiver in determining the codeword used to pre-code the at least one data signal.09-13-2012
20120230232FLEXIBLE TIME DIVISION DUPLEX METHOD AND APPARATUS FOR COMMUNICATION SYSTEM - A flexible Time Division Duplex (TDD) method and apparatus is provided for improving efficiency of communication system. A communication method of a base station supporting TDD includes transmitting, to a terminal, first information including at least one of a flag indicating whether flexible subframes are used and an indicator indicating a candidate flexible subframe set to an uplink subframe; transmitting, to the terminal, second information including a switch flag indicating whether to use the candidate flexible subframe as a downlink subframe; and transmitting, to the terminal, when the candidate flexible subframe is indicated to be used as the downlink subframe, the candidate flexible subframe as the downlink subframe.09-13-2012
20120230231METHOD IN WHICH A MOBILE TERMINAL TRANSMITS/RECEIVES A SIGNAL USING A PREDETERMINED TDD FRAME STRUCTURE IN A WIRELESS COMMUNICATION SYSTEM - The mobile station for transceiving signals using a predetermined time division duplex (TDD) frame structure in a wireless communication system includes a receiver for receiving a midamble from a base station (BS), and a relay station (RS). The receiver receives, from the BS, a first midamble through a second subframe of a downlink access zone of the BS and/or through a first subframe of a downlink relay zone that follows the downlink access zone. Alternatively, the receiver receives, from the RS, a second midamble through a second subframe of a downlink access zone of the RS. A transition gap in a downlink region is located in the last subframe of the downlink access zone of the RS, which follows the downlink access zone of the RS, and a transition gap in an uplink region is located in a first subframe of an uplink relay zone of the RS.09-13-2012
20080298281Method and system for automated determination of inter-system border thresholds - A method and system for determining thresholds for evaluating inter-system handovers in a wireless communication system includes determining a quality level of a first digital duplexing type, determining a quality level of a second digital duplexing type, and comparing the quality levels to determine whether to handover from the first digital duplexing type to the second duplexing type.12-04-2008
20080298280METHOD FOR DYNAMICALLY IDENTIFYING LOCATIONS OF MOBILE NODES IN A TIME DIVISION MULTIPLE ACCESS BASED AD HOC COMMUNICATION NETWORK - Disclosed is a method for dynamically identifying locations of a plurality of mobile nodes in a time division multiple access (TDMA) based ad hoc communication network, wherein one or more mobile nodes are being moved in and out of a predefined region. The method comprises allocating a hello slot in a dedicated channel of the TDMA based ad hoc communication network to each of the mobile nodes and announcing the allocation to the mobile nodes through hello slot allocation map, receiving location information from each of the mobile nodes during their hello slot and determining mobile nodes that are inside the predefined region based on the received location information, allocating a data slot to each determined mobile nodes inside the predefined region and announcing the allocation to the mobile nodes through data slot allocation map, and receiving updated location information from each determined mobile nodes during their data slot.12-04-2008
20110002244RELAYS IN MULTI-USER MIMO SYSTEMS - A method for signalling in a MIMO system. The system comprises a base station (BS) and at least one relay station (RS) operating in half duplex realized using Time Division Duplex. The BS and the RS distribute channels to at least one mobile station (MS). The method is particularly characterized in the steps where: —the BS selects at least one RS which is served during a first time slot (TS01-06-2011
20120269103APPARATUS AND METHOD FOR TRANSMITTING ACKNOWLEDGEMENT INFORMATION IN A TDD COMMUNICATION SYSTEM - Methods and apparatus are described for a User Equipment (UE) configured with multiple cells in the downlink of a time division duplex communication system to transmit HARQ-ACK information in a Physical Uplink Shared CHannel (PUSCH), to map HARQ-ACK bits transmitted in a PUSCH to information regarding correct or incorrect detections of data transport blocks in different cells and different transmission time intervals, and to provide a same understanding with an intended reception point of the information represented by HARQ-ACK bits the UE transmits in a PUSCH.10-25-2012
20120269104Method and System for a Greedy User Group Selection with Range Reduction in TDD Multiuser MIMO Downlink Transmission - Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a communication system, based on a signal for a user within a search range and at least one other signal for one other user within the search range. The search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The signal for the user may be selected from the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.10-25-2012
20120320806METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING TIME DIVISION DUPLEX FRAME CONFIGURATION INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting and receiving Time Division Duplex (TDD) frame configuration information are disclosed. The base station transmits TDD frame configuration information as system information to a user equipment through a common control channel so as to dynamically change the TDD frame configuration according to uplink and downlink traffic conditions. The base station may deliver the same system information to all user equipments in the cell, removing ambiguity in User Equipment (UE) operations and avoiding interference. In comparison to an existing method of delivering TDD frame configuration information through system information update, the disclosed method enables user equipments to rapidly cope with traffic changes. In addition, user equipments may receive and apply TDD frame configuration information at the same time.12-20-2012
20120320804Method and Apparatus for ACK/NAK Transmission in a Time Division Duplex Wireless System - A base station of a wireless time division duplex network which communicates with a UE having a network interface unit. The base station having a processing unit which determines to use either ACK/NAK bundling or ACK/NAK multiplexing to communicate with the UE through the network interface unit based on predetermined criteria. A method of a base station of a wireless time division duplex network which communicates with a UE to choose either ACK/NAK bundling or ACK/NAK multiplexing having the steps of determining with a processing unit of the base station to use either ACK/NAK bundling or ACK/NAK multiplexing to communicate with the UE through a network interface unit of the base station based on predetermined criteria. There is the step of communicating with the UE through the network interface unit using either ACK/NAK bundling or ACK/NAK multiplexing based on the predetermined criteria.12-20-2012
20110235556Method and System for a Double Search User Group Selection Scheme with Range Reduction in TDD Multiuser MIMO Downlink Transmission - Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiple-input multiple-output (MIMO) system, based on reducing a search range within which to find a group of signals having maximum channel gain. At least one of: a first signal for a first user and a second signal for a second user may be selected, which are both within the reduced search range, and which provides a maximum system capacity. The first signal for the first user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.09-29-2011
20110235555EFFICIENT RESOURCE UTILIZATION IN TDD - In a wireless communication system unused resource elements are utilized to transmit additional pilot and control signals. The additional pilot and control signals may mitigate the impact of interference. The unused resource elements may be in a downlink pilot timeslot (DwPTS) in a time division duplex system.09-29-2011
20120281599COMMUNICATION METHOD AND DEVICE - A communication method and device are applicable in a mobile communication system of LTE Type 2 wideband TDD. The method includes: transmitting, by a first communication device, to a second communication device a radio frame, where the radio frame includes a data timeslot for transmitting data, an uplink special timeslot and a downlink special timeslot for carrying synchronizing information, and the data timeslot is shorter than an original data timeslot by a first timeslot, and at least part of the first timeslot is located at the downlink special timeslot.11-08-2012
20110280163Precoding in Telecommunication Network - It is described a method for compensating interference effects within a telecommunication network including at least a first base station and a second base station, which serve in a cooperative manner a first user equipment and a second user equipment by using time division duplex. The method is applied in an operational state, in which the first base station is in a downlink mode and the second base station is in an uplink mode. The method includes (a) determining at least one of a first channel state information between the first base station and the second base station and a second channel state information between the first user equipment and the second user equipment, (b) encoding data signals based on the first and/or the second channel state information, and (c) transmitting the encoded data signals by the first base station and/or by the second base station. It is further described a telecommunication network, a program element and a computer readable medium, which are adapted to carry out or control the described method.11-17-2011
20120327821Systems and Methods for Different TDD Configurations in Carrier Aggregation - Systems and Methods for supporting carrier aggregation with different TDD configurations are proposed. In a first novel aspect, corresponding apparatus structure is described. In a second novel aspect, aggregation constraint is discussed. In a third novel aspect, transceiving mechanisms over multiple component carriers in DL/UL overlapped subframes are proposed. For simultaneous DL/UL transceiving, band combination indication methods are proposed, and HARQ feedback mechanisms are proposed. For non-simultaneous DL/UL transceiving, transceiving configuration methods are proposed, and the same HARQ feedback mechanisms are proposed. In a fourth novel aspect, CQI/RLM/RRM measurement mechanisms are proposed. In a fifth novel aspect, UE capability signaling mechanisms are proposed. The objective is to support flexible aggregation, to enhance DL data throughout, and to improve UL transmit power efficiency.12-27-2012
20120327822PORTABLE TERMINAL DEVICE, BASE STATION, AND METHOD OF AVOIDING INTERFERENCE - A portable terminal device is provided with a wireless communication unit, which performs wireless communication via a base station using a TDMA/TDD system; a frame-error monitoring unit, which monitors a presence or absence of the frame error in respective consecutive frames composed of a plurality of time slots; a storage unit, which stores the presence or absence frame errors as a frame error array; a calculation unit, which calculates a degree of similarity between the frame error array and each of delayed frame error arrays obtained by delaying the frame error array by every one frame; an determining unit, which determines whether periodic frame errors are present, based on the degree of similarity; and an interference avoiding unit, which performs a procedure for the periodic frame errors in a case where it is determined that the periodic frame errors are present.12-27-2012
20120327820METHOD, APPARATUS AND COMPUTER READABLE MEDIUM FOR SETTING A RADIO FREQUENCY GAIN - The invention teaches a solution for a Time Division Duplex (TDD) and Frequency Division Duplex (FDD) networks. In the solution, a threshold value is set for a radio frequency gain. The value of the radio frequency gain is limited to the threshold value during an initial synchronization phase where user equipment is first trying to receive synchronization signals in a transmission from a base station.12-27-2012
20100002608METHOD FOR IMPROVING COEXISTENCE BETWEEN ADJACENT TDD AND FDD WIRELESS NETWORKS - A method is provided for reducing interference between FDD and a TDD interfering radio networks. For each of the networks, identifying respective radio entities of a pre-defined type for which the interferences should be reduced; defining a time pattern composed of time slots on each of the interfered FDD and TDD frequency channels, that comprises receive time intervals for radio entities of the pre-defined types that are likely to be interfered; aligning the time patterns so that receive time intervals for the radio entities that are potentially exposed to interferences, overlap each other; defining at least two types of time intervals within the time pattern on each frequency channel, wherein a first type of time intervals enables receiving communications with substantially reduced interference and a second type of time intervals for exchanging communications without mitigating interferences induced by radio entities transmitting during that time intervals. The radio entity that might create interference to the radio entity of the pre-defined type of the other network, is prevented from transmitting communications that might create e substantial interference to the radio entity associated with the other radio network, and communications transmitted to some of radio entities of the pre-defined types that might experience interference are scheduled at intervals of the first type.01-07-2010
20100202328COMMUNICATION METHOD AND DEVICE - A communication method and device are applicable in a mobile communication system of LTE Type2 wideband TDD. The method includes transmitting, by a first communication device, to a second communication device a radio frame, where each half-frame of the radio frame including a data timeslot for transmitting data, an uplink special timeslot and a Downlink special timeslot for carrying synchronizing information, and the data timeslot is shorter than an original data timeslot by a first timeslot and/or the uplink special timeslot is shorter than an original uplink special timeslot by a second timeslot; and a part of the first timeslot or the second timeslot or the combination of the first timeslot and the second timeslot, having the length of one orthogonal frequency division multiplex symbol, carries a secondary synchronous channel.08-12-2010
20100202327WIRELESS COMMUNICATION SYSTEM - A method for communication includes transmitting a first uplink message from a first remote node (08-12-2010
20100202326METHOD AND SYSTEM FOR A MULTI-PORT DISTRIBUTED ANTENNA - Methods and systems for a multi-port distributed antenna are disclosed and may include configuring one or more amplifiers to communicate signals via one or more ports on a distributed antenna. A characteristic impedance of the distributed antenna at each of the one or more ports may be configured by a location of the one or more ports on the distributed antenna. The amplifiers may be impedance matched to the distributed antenna by coupling each of the amplifiers to the ports based on the characteristic impedance. The amplifiers may include power amplifiers and/or low noise amplifiers. The signals may be time division duplexed. The signals communicated via the ports on the distributed antenna may include RF signals. The distributed antenna may be integrated on a chip with the amplifiers or may be located external to a chip with the amplifiers. The distributed antenna may include a microstrip antenna.08-12-2010
20100202325DUAL MODE TRANSCEIVER - A circuit is disclosed with an external coupling port for coupling to an external antenna, for example. The circuit has an FDD receive path including a narrowband passband filter. The circuit has a TDD receive path bypassing the narrowband passband filter but relying on a same amplifier. The circuit also has an FDD transmit path including a narrowband passband filter. The circuit has a TDD transmit path bypassing the narrowband passband filter of the FDD transmit path but relying on a same transmit amplifier. A switching configuration allows the circuit to operate in TDD mode, alternating between the TDD receive path and the TDD transmit path and in the FDD mode wherein the FDD transmit and receive paths are simultaneously coupled to the external coupling port.08-12-2010
20130010657VEHICLE CREW COMMUNICATIONS SYSTEM - The vehicle crew communication system provides up to sixty wireless headsets that can be used with one base station, a range of 1600 feet from the base station for operation of the headsets, full duplex operation communication over digitally encrypted DECT protocol links from one base station to a plurality of headsets, pairing of each headset to a particular base station, use of wireless technology inside and outside of the vehicle, automatic channel and link selection to transparently avoid interfered-with channels and links, removal of the need to manually select a channel on the headset, and the combination of the noise-cancelling microphone with noise threshold, noise attenuation, and line echo cancellation tuned to intercom parameters. The invention may be used with or without a vehicle.01-10-2013
20130010656CELL RESELECTION FOR SIMULTANEOUS -LTE AND TD-SCDMA COMMUNICATIONS - In a wireless communication system, a user equipment (UE) may be capable of communication on multiple radio access networks. A UE may be in simultaneous communication with one radio access network, such as TD-SCDMA for circuit-switched voice calls and with another radio access network, such as TDD-LTE for packet-switched data communications. When the TDD-LTE network is idle, the UE may evaluate signal strength of the respective network for potential cell reselection. The UE may measure only a serving TD-SCDMA cell for purposes of switching packet-switched service to the TD-SCDMA network, thereby avoiding a situation where the UE attempts to connect to a different TD-SCDMA cell for purposes of packet-switched communications than the cell presently affiliated with the UE for circuit-switched communications.01-10-2013
20130016635BLUETOOTH PACKET SCHEDULING RULES FOR LTE COEXISTENCE - To mitigate potential interference between radio access technologies (RATs) on a multi-RAT device, traffic scheduling rules may be implemented so that communications of the individual RATs are timed in a manner that reduces interference. For example, communications of a Bluetooth/WLAN RAT may be scheduled such that initial and responsive communications of the Bluetooth/WLAN RAT occur during sub-frames of an LTE RAT that are less likely to cause cross-RAT interference.01-17-2013
20120243447DUAL ANTENNA DISTRIBUTED FRONT-END RADIO - Certain aspects of the present disclosure provide a dual antenna distributed radio frequency front end (RFFE). RFFE topologies described herein may provide lower insertion loss (IL), reduced emission mask, decreased power consumption, and/or lower noise figure (NF) compared to conventional RFFE topologies. One example apparatus for wireless communications generally includes first and second power amplifiers (PAs) for amplifying signals for transmission, a transmit antenna for transmitting the amplified signals, a receive antenna for receiving other signals to be processed in a receive path, and a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA. For certain aspects, a divided inter-stage filter providing overlapping frequency bands may be utilized. For certain aspects, the RFFE may support frequency-division duplexing (FDD)/TDD (time-division duplexing) coexistence, including support for FDD/TDD MIMO (multiple input multiple output).09-27-2012
20080240002Wireless Transmission Method of Using Efficient High Performance Frame Structure in Wideband Tdd System - The present invention provides a method of wireless transmission using a high-efficiency and high-performance frame structure used by the broadband TDD system, wherein the method includes: dividing a sub-frame with a fixed length into N+1 basic slots and three special slots, wherein one basic slot is used to transmit broadcast or paging information of a cell and N basic slots are used to transmit service information in the downlink and uplink; combining several basic slots in the N basic slots to a spreading slot when a transmitting rate of a single slot needs to be improved and using the spreading slot to transmit and spread high rate services with a matching slot length. The present invention proposes a developing direction for the TDD system in the beyond 3G. With this frame structure to perform the wireless transmission, services at different data rates can be provided and the ability of transmitting at different rates up to 100 Mbps when the system bandwidth is 5 MHz, 10 MHz or 20 MHz respectively only by changing the length of the slot, combining basic slots into different multiples of spreading slots, adopting different modulation mode and spreading coefficient.10-02-2008
20080232279METHOD AND SYSTEM FOR SHARING FILTERS BETWEEN TRANSMIT AND RECEIVE PATHS IN AN INTEGRATED FM RADIO - Aspects of a method and system for sharing filters between transmit and receive paths in an integrated FM radio are provided. In this regard, a FM radio receive processing path and a FM radio transmit processing path may each be configured to share a filter. Accordingly, one or more switching elements may enable coupling/decoupling the filter to/from the FM radio transmit and FM radio receive processing paths. Furthermore, the switching elements may be programmatically controlled by a processor and/or memory. Additionally, by coupling the filter to the transmit receive paths during alternating time intervals, aspects of the invention may enable simulating simultaneous transmission and reception of FM radio signals utilizing while sharing one or more filters. In various embodiments of the invention, separate filters may be utilized for an in-phase processing path and a quadrature phase processing path.09-25-2008
20110261729METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation.10-27-2011
20130170406RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS AND MOBILE TERMINAL APPARATUS - Provided are a radio communication system, a radio base station apparatus and a mobile terminal apparatus to which duplex schemes are applied effectively in a communication system of which a frequency band is formed with a plurality of fundamental frequency blocks. In the radio communication system of which a frequency band allocated to radio communication between the radio base station apparatus and the mobile terminal apparatus is configured by adding or deleting fundamental frequency blocks, the fundamental frequency blocks of the frequency band have at least a first fundamental frequency block and a second fundamental frequency block, the first fundamental frequency block is used to perform FDD-based radio communication and the second fundamental frequency block is used to perform TDD-based or half duplex FDD-based radio communication.07-04-2013
20130170407Method and User Equipment for Mapping ACK/NACK Response Messages - The present invention provides as method and a user UE for mapping ACK/NACK response messages. The method comprises the UE determining number L of bits of ACK/NACK response messages according to predetermined conditions, wherein, the predetermined conditions include at least one of: a number of downlink component carriers or cells that are allocated to the UE by a base station, and a transmission mode of each of the downlink component carriers; and the UE mapping the ACK/NACK response messages to the L bits so as to handle them correctly.07-04-2013
20130176918METHOD FOR TRANSMITTING HARQ-ACK INFORMATION BASED ON TRANSMISSION DIVERSITY - A method for transmitting HARQ-ACK information based on transmission diversity is provided. The method includes configuring two component carriers, referred to as Cells, for a User Equipment (UE); when a base station configures the UE to transmit HARQ-ACK information adopting the transmission diversity technique, the base station indicates dynamically whether an other Cell is scheduled in the same subframe via a PDCCH scheduling a PDSCH of one Cell, so as to enable the UE to know the number of Cells scheduled in the same downlink subframe by the base station, and to generate HARQ-ACK information based on the number of Cells. Unnecessary spatial bundling of the HARQ-ACK information may be avoided, unnecessary downlink data retransmission is reduced and throughput of downlink data is improved.07-11-2013
20130176919TRANSMISSION METHOD AND DEVICE IN LONG TERM EVOLUTION TIME DIVISION DUPLEX SYSTEM - A transmission method in a Long Term Evolution time division duplex system can carry out reconfiguration for half-frame structures. According to the coverage range requirements of the system, it performs flexible configuration of the number of special time slot areas and the downlink pilot time slots, guard intervals or uplink pilot time slots included therein, and so can support different coverage ranges. A base station and user terminal using above method in the Long Term Evolution time division duplex system.07-11-2013
20130176920METHOD AND APPARATUS FOR TRANSMITTING A PLURALITY OF PIECES OF RECEIPT ACKNOWLEDGEMENT INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method and apparatus for transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment to which a plurality of cells are assigned in a wireless communication system operating with time division duplex (TDD). The method includes: receiving a plurality of codewords via the plurality of serving cells; generating ACK/NACK information indicating reception acknowledgement for each codeword; bundling the generated ACK/NACK information; and transmitting the bundled ACK/NACK information, wherein the bundling is sequentially performed on a part or entirety of the generated ACK/NACK information until an amount of the ACK/NACK information is less than or equal to a predetermined transmission amount.07-11-2013
20110274015TDD Time Slot Splitting - The invention discloses a method for a cellular communications system, in which traffic is sent in frames, each frame comprising a first number of subframes, with a second number of said subframes being available for at least either uplink or downlink traffic. At least one of said second number of subframes is made to comprise at least three parts, as follows: 11-10-2011
20130142090APPARATUS AND METHOD FOR PROVIDING DIVERSITY SERVICE ANTENNA IN PORTABLE TERMINAL - An apparatus and method configure a diversity antenna in a portable terminal. The apparatus includes a first antenna, a second antenna, a first communication unit for processing a first communication scheme signal communicated through the first antenna, a second communication unit for processing a second communication scheme signal communicated through the second antenna, and a control unit for configuring the first antenna as a diversity antenna for the second communication unit when the first communication unit is not driven.06-06-2013
20120250591METHOD FOR CARRIER AGGREGATION AND METHOD FOR DYNAMIC SPECTRUM ALLOCATION - A method for carrier aggregation comprises: in a first time zone, sending, by a radio access point, a downlink signal to a user terminal by using a first guard band between a time division duplexing (TDD) system and a frequency division duplexing (FDD) system and a bidirectional communication band of the TDD system; or/and, in a second time zone, receiving, by the radio access point, a uplink signal sent by the user terminal using a second guard band between the TDD system and the FDD system and the bidirectional communication band. A method for dynamically allocating a spectrum is further provided. By way of the present invention, the utilization rate of the guard band and the flexibility in the use of the guard band are improved.10-04-2012
20130176917Method of Handling Hybrid Automatic Repeat Request Acknowledgement Responses in Wireless Communication System - A method of handling hybrid automatic repeat request (HARQ) acknowledgement responses in a network of a wireless communication system is disclosed. The method comprises assigning resources for a plurality of physical hybrid indicator channels (PHICHs) and a plurality of extended physical hybrid indicator channels (ePHICHs); and transmitting a HARQ acknowledgement response to a communication device of the wireless communication system on a channel selected from the plurality of PHICHs and the plurality of ePHICHs, after receiving an uplink transmission from the communication device.07-11-2013
20130114476CAPACITY INCREASING DEVICES AND METHODS FOR WIRELESS COMMUNICATION - The present patent application improves DARP by allowing multiple users on one time slot (MUROS). It comprises means and instructions for sharing signals on a single channel, comprising setting up a new connection, allocating a new time slot if there is an unused time slot on a channel frequency, selecting an used time slot for the new connection to share with an existing connection if there is not an unused time slot on the channel frequency, and selecting a different training sequence code for the new connection if the used time slot on the channel frequency has been selected for the new connection to share with an existing connection.05-09-2013
20130114475WIRELESS COMMUNICATION SYSTEM - A wireless communication system broadcasts a control signal at a first frequency band from a base station and allocates additional frequency band(s) for transmitting data via terminal(s). A control signal at the first frequency band indicates the location of the additional frequency band(s) and is not transmitted over the additional frequency band(s). Wireless data transmission is simultaneously performed over the first frequency band and the additional frequency band(s). Each terminal receives the control signal, which is used in time-synchronizing frames between the wireless data transmission at the first frequency band and the wireless data transmission at the additional frequency band(s). The control signal also includes control data for managing wireless data transmission between the base station and the terminal(s) at the first frequency band, and is utilized instead of a control signal at the additional frequency band(s).05-09-2013
20130114472CARRIER AGGREGATION OF CARRIERS WITH SUBFRAME RESTRICTIONS - Embodiments contemplate enabling relay node uplink control information transmission on an interface between a relay node and a donor eNodeB (DeNB) in one or more subframes. Embodiments contemplate techniques to avoid restrictions on uplink transmissions on a cell (perhaps due to subframe configuration), such as on a primary cell, where the restrictions may make relay node uplink control information transmission difficult (if not impossible) on the interface between a relay node and a donor eNodeB (DeNB). Embodiments also contemplate that resources on the interface between the relay node and the donor eNodeB may be scheduled across one or more component carriers or serving cells.05-09-2013
20130114478METHOD AND DEVICE FOR SELECTING USER TERMINAL SO AS TO ENHANCE RECIPROCITY ERROR CALIBRATION BETWEEN UPLINK AND DOWNLINK - The present invention provides a method and a device for selecting user terminal so as to enhance calibration for reciprocity error between uplink and down-link, in the purpose of enhancing the accuracy of calibration for reciprocity error between uplink and downlink in TDD system. Wherein, the method comprises the following steps: obtaining channel quality related information between a plurality of first user terminals and a first base station, wherein said channel quality related information is used for indicating channel qualities between said plurality of first user terminals and said first base station; selecting, at least one first user terminal as a calibration user terminal for calibrating said reciprocity error between uplink and downlink, according to said channel quality related information.05-09-2013
20130114477METHOD FOR TRANSMITTING RESPONSE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for transmitting response information on downlink data through multiple information blocks to be bundled in a wireless system in a time division duplex (TDD) mode. The method for transmitting response information according to the present invention comprises the following steps: coding response information on the downlink data; scrambling the coded response information; and transmitting the scrambled response information to a base station, wherein, if a portion of the bits of the coded response information are information bits that indicate ACK/NACK on the downlink data, the scrambling step involves scrambling the coded response information using a specific scrambling sequence, and the specific scrambling sequence includes information on the number of information blocks to be bundled.05-09-2013
20130094410METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method and apparatus for transmitting uplink control information when a plurality of cells is configured. The method includes receiving at least one of PDCCH(s) and PDSCH(s), generating reception response information about at least one of the PDCCH(s) and the PDSCH(s), and transmitting the reception response information through a PUCCH on an SR subframe.04-18-2013
20130114473SIGNALING AND TRAFFIC CARRIER SPLITTING FOR WIRELESS COMMUNICATIONS SYSTEMS - Methods, systems, and devices for separating signaling data and traffic data onto separate carriers for wireless communications systems are provided. Some embodiments utilize flexible bandwidth that may utilize portions of spectrum that may not be big enough to fit a normal waveform through utilizing flexible waveforms. Flexible bandwidth systems may lead to reduced data rate on the signaling or other channels. Separating the signaling and the data traffic into different flexible bandwidth carriers so that assigned resources can be customized to different traffic patterns may address this issue. In some embodiments, the signaling data is received and/or transmitted over a first carrier separate from any other traffic data. For example, the signaling data may be received and/or transmitted over the first band carrier without any other traffic data. The traffic data and/or network data associated with the signaling data may be received and/or transmitted over a separate, second carrier.05-09-2013
20130100865METHOD AND SYSTEM OF AGGREGATING COMPONENT CARRIERS ACROSS FREQUENCY BANDS - A method and system for aggregating component carriers across frequency bands are provided. The method includes aggregating a DL carrier of a first cell associated with a first frequency band with an UpLink (UL) carrier of a second cell associated with a second band, wherein the first cell includes an aggregated downlink carrier and an unused uplink carrier; communicating cross-linking information for carrier aggregation associated with the DL carrier of the first frequency band with the UL carrier of the second frequency band to a plurality of user equipments; and performing data transfer with each of the plurality of user equipments using the aggregated DL carrier of the first frequency band and the UL carrier of the second frequency band.04-25-2013
20130100864ENERGY-EFFICIENT UNDERLAY DEVICE-TO-MULTIDEVICE COMMUNICATIONS WITH INTERFERENCE SUPPRESSION - A method for performing device-to-multidevice communication with interference suppression is provided. The method may include selecting at least one receiving user equipment for D2MD transmission, and receiving requested data rates from the selected at least one receiving user equipment. The method may further include acquiring CSI matrices and identifying interference constraints to the C-UEs sharing the same frequency band as the at least one receiving user equipment. The method then includes determining precoding matrices using the acquired CSI matrices and the identified interference constraints to the C-UEs, and performing D2MD transmission to the at least one receiving user equipment using the determined precoding matrices.04-25-2013
20130114474SYSTEM AND METHOD FOR TRANSMITTING HARQ-ACK INFORMATION - According to one embodiment, a method for transmitting HARQ-ACK information, in which the HARQ-ACK information within a current bundling window is bundled, so that a total number of bits of the bundled HARQ-ACK information is compliant with a requirement associated with a length of the HARQ-ACK information required by a transmission format of the HARQ-ACK information, which may support carrier aggregation with more CCs in TDD UL/DL configuration 5, such that a peak throughput of user downlink is improved.05-09-2013
20130128781Method and Device for Implementing Synchronization Between Different Systems - The present invention provides a method and a device for implementing synchronization between different systems. The method includes setting a starting time of an LTE TDD frame, where the starting time set for the LTE TDD frame is later than a starting time set for a WiMAX frame. The LTE TDD frame is transmitted after the starting time of the LTE TDD frame arrives. The WiMAX frame adopts a subframe ratio structure of 29:18, the LTE TDD frame adopts a subframe ratio structure of subframe configuration 1, and an UpPTS time slot and a last uplink symbol of a last uplink subframe which are in the LTE TDD frame are in a status of being knocked off.05-23-2013
20130128780USER EQUIPMENT USING HYBRID AUTOMATIC REPEAT REQUEST - A user equipment comprises a transmitter and an adaptive modulation and coding controller. The transmitter is configured to transmit data over an air interface in a single transmission time interval with a first specified modulation and coding scheme, where the single transmission time interval has a plurality of transport block sets. In response to receiving a repeat request for retransmission of at least one particular transport block set, the transmitter retransmits the at least one of the particular transport block sets. The adaptive modulation and coding controller is configured to change the specified modulation and coding scheme to a second specified modulation and coding scheme, enabling a combining of a particular transport block set transmitted at the first specified modulation and coding scheme with a retransmitted version of the particular transport block set transmitted at the second specified modulation and coding scheme.05-23-2013
20100278081Method and apparatus of sending synchronization signals in TDD systems - The present invention discloses a method and apparatus of sending synchronization signals in TDD systems. The method includes: sending P-SCH signals of synchronization signals on the third symbol of a DwPTS; sending S-SCH signals of the synchronization signals on the last OFDM symbols of time slot 11-04-2010
20110211501METHOD AND APPARATUS FOR FDD AND TDD TERMINAL ENTRY INTO A WIRELESS COMMUNICATION NETWORK - Entry of a terminal into a wireless communications network is facilitated for terminals which may operate in either frequency-division duplex or time-division duplex mode. Join request messages transmitted by the terminals include a duplex capability indicator defining a carrier frequency which can be used to response to the terminals.09-01-2011
20110211500MOBILE COMMUNICATIONS SYSTEM AND METHOD - A mobile communications system includes a first system which communicates with a user apparatus in a frequency division duplex (FDD) scheme and a second system which communicates with a user apparatus in a scheme which is different from the first system. The second system conducts uplink and downlink communications within a frequency bandwidth between uplink and downlink of the first system. A geographical range of the second system is narrower than a geographical range of the first system. A downlink transmission power of a base station of the second system is weaker than a downlink transmission power of a base station of the first system.09-01-2011
20080198776APPARATUS FOR OPTIONALLY SUPPORTING TIME DIVISION DUPLEX AND FREQUENCY DIVISION DUPLEX IN A WIRELESS COMMUNICATION SYSTEM - A Radio Frequency (RF) front-end apparatus in a wireless communication system is provided. The apparatus includes a plurality of BandPass Filters (BPFs) for band-pass filtering a transmission signal or a reception signal, at least one circulator for dividing a signal transmission path and a signal reception path and at least one switch for controlling the signal transmission path and the signal reception path. The RF front-end apparatus provided by the present invention supports various frequency bands and optionally supports TDD and FDD in a wireless communication system.08-21-2008
20080198775REDUCING AUTOMATIC GAIN CONTROL PROCESS IN TIME DIVISION DUPLEX COMMUNICATION MODE - In TDD mobile networks, an incoming signal is received during a time period where no uplink communication takes place. The incoming signal is measured and analyzed to determine a noise level. Based on the noise level and on an uplink signal level from expected in a future uplink time slot, a gain for the automatic gain controller is set for use in future uplink communications. The gain is set to optimize the operation of an analog-to-digital converter.08-21-2008
20080198774Superframe Having Increased Data Transmission Efficiency - A TDD/TDMA wireless superframe includes a slot having a plurality of OFDM symbols. A guard time interval is arranged after the slot containing the OFDM symbols. There are a plurality of packets arranged subsequent to the guard time interval. A majority of the plurality packets comprise payload frames that are dynamically assigned in concatenation so as to provide access to/from one or more legacy devices operating in a LAN environment under a different protocol. The TDD/TDMA protocol is compatible with existing legacy devices under CSMA/CA. When there is at least one legacy device and one non-legacy device receiving communication, the legacy device is provided communication by enabling the Dynamic Contention packet service, with both the legacy device and non-legacy device receiving communications in the same frequency band.08-21-2008
20130148552BASE STATION AND METHOD FOR ALLOCATING COMMUNICATION RESOURCE THEREOF, USER DEVICE AND COMMUNICATION CONTROL METHOD THEREOF - A base station communicates with a user device in the mode of time division duplexing based on the orthogonal frequency division multiplexing scheme. The physics transmission resource used for communicating between the station and device is divided into a plurality of continuous frames in the time domain, each containing a plurality of sub-frames. The base station can include: a period determination device, for determining the period of the current frame, composed of a predetermined number of frames in a plurality of frames; a judgment device, for determining whether each sub-frame in the current frame is marked as the first or second state; a communication control device, for permitting the base station to communicate with the user device on the sub-frame when it is in the first state, forbidding communication only concerned with the user device performed by the base station on the sub-frame when it is in the second state.06-13-2013
20120257551Duplex Communication Method, Terminal Scheduling Method and System - The present invention provides a method for duplexing communication, and a method and a system for scheduling a terminal. The method for scheduling a terminal includes: determining capability information of the terminal when the terminal makes a request for a service; allocating a band resource for the terminal according to the capability information of the terminal and the currently available band resources, and sending information of the allocated band resource to the terminal in the band currently used by the terminal, wherein the allocated band resource includes a bidirectionally used band, and at least one of the uplink band and downlink band includes a unidirectional band; and communicating with the terminal in the manner of time division duplexing by way of the allocated band resource. The present invention makes the best of the band resources near the TDD licensed band and improves the communication efficiency.10-11-2012
20120257550MEASUREMENT IN SIMULTANEOUS TDD-LTE AND TD-SCDMA/GSM SYSTEMS - In a mobile device for wireless communication capable of communicating on multiple radio access technologies (RATs), cell selection may be improved by reusing cell measurements for inter-RAT cell selection. This will reduce the number of cell measurements taken and improve mobile device performance. A time threshold may be used to instigate new cell measurement to prevent cell measurement data from being outdated.10-11-2012
20120257549PACKET-SWITCH HANDOVER IN SIMULTANEOUS TDD-LTE AND TD-SCDMA MOBILE COMMUNICATIONS - A mobile device capable of communicating on multiple radio access networks simultaneously may concurrently operate calls of a first call type on a first network and a second call type on the second network. As the mobile device approaches the limits of the service area of the second network it may take measurements to result in the call of the second call type to be serviced by the serving cell of the first network which is serving the mobile device for the first call type. In this manner the mobile device may ensure that when it leaves the service area of the second network, the calls of the first call type and second call type are served by the same serving cell in the first network.10-11-2012
20120275353MOBILE COMMUNICATION SYSTEM AND METHOD FOR PROVIDING COMMON CHANNEL COVERAGE USING BEAMFORMING ANTENNAS - A wireless transmit/receive unit (WTRU) includes circuitry configured to receive information from a base station indicating an assignment of periodic time slots to transmit sounding signals and circuitry configured to transmit sounding signals to the base station in the assigned periodic time slots in response to the received information, wherein a timing of transmission of the sounding signals in response to the received information differs between a time division duplex mode and a frequency division duplex mode, and wherein the transmitted sounding signals are distinguishable from sounding signals from other WTRUs.11-01-2012
20120275352Wireless relay device and method for wireless relay device to communicate with base station and terminal - A wireless relay device includes: a first receiving channel configured to receive signals from a base station or from a base station and a terminal, a second receiving channel configured to receive signals from the terminal, a first sending channel configured to send signals to the base station or to the base station and the terminal, and a second sending channel configured to send signals to the terminal, and further includes a radio frequency control unit configured to, during communicating with the base station and the terminal, control the first receiving channel, the second receiving channel, the first sending channel and the second sending channel to use frequency bands in the following mode: receiving signals synchronously from the base station and the terminal in a first time interval, and sending signals synchronously to the base station and the terminal in a second time interval, wherein the third frequency band and the fifth frequency band are two guard bands between the working frequency band of a Frequency Division Duplex (FDD) system and the second frequency band serving as the working frequency band of a Time Division Duplex (TDD) system. The disclosure realizes the bidirectional relay communication between the base station and the terminal by using an idle guard band, increasing the utilization efficiency and the utilization flexibility of the guard band.11-01-2012
20130155917Dynamic sub-frame configuration method and apparatus in time division duplex system - The present application discloses a dynamic sub-frame configuration method in the TDD system. The method includes: in the case that the uplink and downlink sub-frame configuration of a cell and the uplink and downlink sub-frame configuration of its neighboring cell are different in the configuration of a sub-frame, a part of resources on the sub-frame are made to be silent for the cell, and the resources on the sub-frame corresponding to the resources not silenced on the sub-frame for cell are made to be silent for the neighboring cell; or, a part of resources on the sub-frame are made to be silent for the neighboring cell, and the resources on the sub-frame corresponding to the resources not silenced on the sub-frame for the neighboring cell are made to be silent for the cell. The present application further provides a dynamic sub-frame configuration apparatus in the TDD system. Not only can the problem that inter-cell interference is introduced during sub-frame switching in the TDD system be solved, but also the normal uplink and downlink measurement can be guaranteed, without affecting ACK/NACK is feedback and HARQ process, and meantime the frequency spectrum utilization ratio is increased.06-20-2013
20130155914RESOURCE ALLOCATION FOR PUCCH FORMAT 1B WITH CHANNEL SELECTION IN AN LTE-A TDD SYSTEM - Embodiments of methods and apparatus for resource allocation for physical uplink control channels are described herein. Other embodiments may be described and claimed.06-20-2013
20130155915USER EQUIPMENT, PDSCH A/N TRANSMITTING METHOD THEREOF, TRANSMISSION/RECEPTION POINT, AND PDSCH A/N RECEIVING METHOD THEREOF - The present invention relates to a system that includes a transmission/reception point and a user equipment having different configurations in inter-band and performs a TDD (Time Division Duplex) method.06-20-2013
20130155916RESOURCE SELECTION FOR TRANSMISSION OF MULTIPLE ACK/NACK ON PUCCH CHANNEL - In a method of operating a communication network (06-20-2013
20120281602WIRELESS COMMUNICATION SYSTEM, BASE STATION APPARATUS, MOBILE STATION APPARATUS, COMMUNICATION CONTROL METHOD, AND COMMUNICATION CONTROL PROGRAM - A mobile station apparatus can stably communicate with a base station apparatus even when interference occurs due to a signal from another apparatus in a part of a frequency band used for communication. A second base station apparatus communicates with the mobile station apparatus using a common frequency band, which is all or part of a frequency band to be used for communication by the first base station apparatus, and a dedicated frequency band to be unused by the first base station apparatus. A communication band selection unit a11-08-2012
20120281601METHOD AND APPARATUS TO IMPROVE INTER-BAND CARRIER AGGREGATION (CA) IN TDD (TIME DIVISION DUPLEX) MODE - A method and apparatus are disclosed to improve inter-band carrier aggregation (CA) in a UE (User Equipment) in TDD (Time Division Duplex) mode. In one embodiment, the method includes connecting the UE with a PCell (Primary Serving Cell). The method further includes configuring the UE with at least one SCell (Secondary Serving Cell), among which at least one SCell is deactivated, wherein TDD UL-DL (Uplink-Downlink) configurations of the PCell and the at least one SCell may be different. The method also includes taking a TDD UL-DL configuration of an activated serving cell into consideration for defining consecutive PDCCH (Physical Downlink Control Channel) subframes of a drx-InactivityTimer, and not taking a TDD UL-DL configuration of a deactivated serving cell into consideration.11-08-2012
20120281600METHOD AND APPARATUS TO IMPROVE DISCONTINUOUS RECEPTION (DRX) OPERATION FOR TDD (TIME DIVISION DUPLEX) AND FDD (FREQUENCY DIVISION DUPLEX) MODE IN CARRIER AGGREGATION (CA) - A method and apparatus are disclosed for performing DRX (Discontinuous) operation. In one embodiment, the method comprises (i) configuring a plurality of cells for carrier aggregation, (ii) configuring the plurality of cells with a plurality of TDD (Time Division Multiplex) UL-DL (Uplink-Downlink) configurations, (iii) configuring the plurality of cells for DRX operation, (iv) configuring a set of DRX timers for the plurality of cells, and (v) running the set of DRX timers for the plurality of cells.11-08-2012
20120281598Wireless access system using multiple modulation formats in TDD frames and method of operation - A radio frequency (RF) modem shelf for use in a fixed wireless access network comprising, a plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at subscriber premises. The shelf comprises: a) a first RF modem for communicating with wireless access devices using TDD frames, each TDD frame having an uplink for, receiving data and a downlink for transmitting data; and b) a modulation controller associated with the RF modem shelf for determining an optimum modulation configuration for each of the wireless access devices communicating with the first RF modem. The controller causes the first RF modem to transmit downlink data to a first wireless access device in a first data block having a first optimum modulation configuration and to transmit downlink data to a second wireless access device in a second data block having a different second optimum modulation configuration.11-08-2012
20110310778METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM - A method of relaying data in a wireless communication system is provided. The method comprises: receiving data, transmitted over a first subframe from a base station, over a second subframe; and relaying the data to a user equipment over a third subframe which is placed after one or more subframes from the second subframe, wherein at least any one of the first and the second subframes is a non-detection subframe to which the user equipment does not attempt data detection. According to the present invention, the wireless communication system enables efficient data transmission between a base station and a relay station as compared to conventional subframe-configurated systems. Furthermore, the wireless communication system enables data transmission with improved wireless resource allocation efficiency12-22-2011
20110310777METHOD AND EQUIPMENT FOR USER'S UPLINK DATA SCHEDULING - A user uplink data scheduling method and user equipment, which are applied to multiple-periodicity mode semi-persistent scheduling supporting Transmission Timing Interval (TTI) bundling in the second Downlink/Uplink (DL/UL) timing interval proportion configuration mode (Time Division Duplex (TDD) DL/UL subframe configuration 1) in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) TDD system. The user uplink data scheduling method includes the steps of: acquiring an indication message transmitted from a base station for indicating user uplink data based on the multiple-periodicity mode semi-persistent scheduling; setting a periodicity offset of the multiple-periodicity mode semi-persistent scheduling; determining the periodicities of the multiple-periodicity mode semi-persistent scheduling of per two adjacent TTI bundles according to the set offset; scheduling user uplink new transmission packet data according to the determined periodicities of the multiple-periodicity mode semi-persistent scheduling. The problem that the new-transmission packet and the re-transmission packet of the same user of the multiple-periodicity semi-persistent scheduling conflict is solved, and signal overhead is reduced when TTI bundling supports the VoIP service and so on.12-22-2011
20130188531METHODS AND APPARATUS FOR NETWORK ENERGY SAVINGS IN A WIRELESS COMMUNICATION SYSTEM - Disclosed herein are methods and apparatus for network energy savings in a wireless communication system, such as the 3GPP LTE system. Particularly, one such method reduces power consumption in a base station by selectively muting or disabling downlink transmissions of certain control signal symbols in one or more subframes or frames. The disclosed methods and apparatus can apply independently or in combination in both FDD and TDD systems.07-25-2013
20130188532APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING PHYSICAL UPLINK SHARED CHANNEL SIGNAL IN CELLULAR RADIO COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION SCHEME - An apparatus and a method for transmitting/receiving a Physical Uplink Shared CHannel (PUSCH) signal in a cellular radio communication system supporting a Carrier Aggregation (CA) scheme are provided. In the PUSCH transmission method, a User Equipment (UE) transmits a PUSCH signal to a Base Station (BS) based on an UpLink (UL)/DownLink (DL) Configuration, wherein, for a Time Division Duplexing (TDD) scheme, if the UE is configured with more than one serving cell, UL/DL Configurations of at least two serving cells are different, and a serving cell is one of a primary cell and a secondary cell, a UL/DL Configuration for the serving cell is set as a UL-reference UL/DL Configuration based on a pair formed by a UL/DL Configuration for another serving cell and the UL/DL Configuration for the serving cell.07-25-2013
20130188533Dynamic Direction Changing in Time Division Duplex Radios - In accordance with some embodiments, in a time division duplex system, the transmission direction may be changed dynamically, for example in response to instantaneous traffic conditions. Particularly in some embodiments an eNodeB or base station may, in response to instantaneous traffic conditions, change the direction of transmission in certain subframes. In some embodiments this can be done in a way which is backwards compatible with prior generations of Long-Term Evolution (LTE) radio systems.07-25-2013
20130188534Methods and Devices for Communicating on a Radio Channel Based on Jointly Encoding a Preamble Format with Random Access Configuration - The invention relates to devices and methods for transmitting data on a radio channel comprising to jointly encode a preamble format with a first random access configuration, forming an extended random access configuration. The extended random access configuration is then transmitted on the radio channel.07-25-2013
20130188535METHOD AND APPARATUS FOR TRANSMITTING RECEPTION CONFIRMATION IN WIRELESS SYSTEM - Provided are a method and an apparatus for transmitting a reception confirmation in a wireless system. A terminal determines at least one downlink sub-frame for ACK/NACK feedback from each of a plurality of serving cells and determines the number of ACK/NACK bits for the plurality of serving cells. The terminal generates bundled ACK/NACK bits by arraying the ACK/NACK bits in the ascending order of the cell index of the plurality of serving cells, and transmits the bundled ACK/NACK bits.07-25-2013
20130188530Full-Duplex Deployment In Wireless Communications - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for configuring/implementing by a network/network element a partial full-duplex in time dependent operational mode for wireless communications between UEs and the network/network element, e.g., in LTE systems. The time dependent partial full-duplex may further include bandwidth allocations for the full-duplex and half-duplex time intervals. In the half-duplex time periods, undesirable interference and self-interference effects during signal detection by the UEs and/or eNBs may be reduced to an advantage. The network may configure a time dependence of the partial full-duplex operational mode for wireless communications between UEs and the network, wherein during at least one time interval the network configures a full-duplex operational mode and during at least one other time interval the network configures a half-duplex operational mode for the wireless communications between the UEs and the network.07-25-2013
20120002576METHOD AND SYSTEM FOR AVOIDING INTERFERENCE CAUSED BY NON-SYNCHRONIZATION IN RELAY TDD SYSTEM - The present invention provides a method and a device for eliminating interference in a wireless relay TDD system. Data is sent between a relay station and a base station by occupying time slots of guard period, thereby the interference caused by non-synchronization between the base station and the relay station is eliminated.01-05-2012
20120020258SIMULTANEOUS OPERATION OF SHORT RANGE WIRELESS SYSTEMS WITH A MOBILE WIRELESS BROADBAND SYSTEM - Simultaneous operation of a short-ranged time division duplex (TDD) system with a mobile wireless broadband system may be implemented through scheduling and aligning both sets of communications. After determining a TDD frame configuration of the mobile wireless broadband system, a slot map is generated identifying slot-size selection information for each slot in the TDD frame configuration available for simultaneous operation. The slot-size selection information aligns the communication packet structure of the short-ranged TDD system and the uplink/downlink boundary of the TDD frame configuration. The communication device then transmits the slot map to a short-ranged TDD device for establishing the simultaneous operation.01-26-2012
20130194980DEVICES FOR RECONFIGURING UPLINK AND DOWNLINK ALLOCATIONS - A User Equipment (UE) for reconfiguring uplink and downlink (UL-DL) allocations is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE determines whether at least one subframe is convertible over a default Time Domain Duplexing (TDD) UL-DL configuration. If at least one subframe is convertible, then the UE determines a first reference UL-DL configuration and a second reference UL-DL configuration. The UE also sends any hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to a Physical Downlink Shared Channel (PDSCH) based on the first reference configuration. The UE further determines a Physical Uplink Shared Channel (PUSCH) schedule based on the second reference UL-DL configuration. The UE additionally receives any hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to a Physical Uplink Shared Channel (PUSCH) based on the second reference UL-DL configuration.08-01-2013
20130194981System and Method for Supporting Inter-Band Carrier Aggregation with Different UL/DL TDD Configurations - In some implementations, a method of wireless communications between a wireless communications network and wireless user equipment includes receiving, using a primary Time Division Duplex (TDD) configuration, data on a primary component carrier in a first frequency band. Using a secondary TDD configuration, data on a secondary component carrier is received in a second frequency band different from the first frequency band. A Hybrid Automatic Repeat Request (HARQ) for data received on the secondary component carrier is transmitted using a supplemental TDD configuration. A transmission or retransmission on the secondary component carrier uses a supplemental TDD configuration as well. The supplemental TDD configuration is different from the secondary TDD configuration. Furthermore, an uplink supplemental configuration may be different from a downlink supplemental configuration.08-01-2013
20130194982INTERFERENCE MANAGEMENT FOR DYNAMIC UPLINK AND DOWNLINK CONFIGURATION - An apparatus and method for managing interference to facilitate allocation of a dynamic uplink and downlink configuration are disclosed herein. Determining whether a first cell causes interference less than a pre-determined threshold level to one or more neighboring cells or whether flexible subframes of radio frames associated with the one or more neighboring cells operate as downlink subframes. In response to the determining condition being met, allocating a first flexible subframe of a first radio frame associated with the first cell to operate as a downlink subframe at normal transmit power level. In response to the determining condition not being met, allocating the first flexible subframe of the first radio frame associated with the first cell as one of a downlink subframe operating in a reduced transmit power level or as an uplink subframe.08-01-2013
20130194983METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets.08-01-2013
20130201885Short Random Access Channel (RACH) Disabling in TDD-LTE - In TDD-LTE wireless systems, an additional fourth preamble for the random access channel, called short RACH, may be used. If short RACH signaling is to be used, the random access preamble is transmitted in the uplink pilot time slot (UpPTS) field in the special subframe. The location of the uplink pilot time slot (UpPTS) is next to a downlink subframe. Therefore, interference from neighbor base stations may interfere with the short RACH preamble within the uplink pilot time slot. The interference to the short RACH will prevent the eNodeB from detecting the short RACH preamble and thus prevent the UE from accessing the network. An interference level on an Uplink Pilot Time Slot (UpPTS) may be measured and when the interference level exceeds a threshold value a User Equipment (UE) is instructed to disable short Random Access Channel (RACH) signaling. The UE may then be instructed to enable normal RACH. When the interference level falls below the threshold value the UE is instructed to resume short RACH signaling08-08-2013
20120063372METHOD AND APPARATUS FOR ADAPTIVE CHANNEL UTILISATION - A transceiver with an adaptable filter and a method of controlling the settings of the filter to adapt to local channel assignments and usage are provided. The adaptable filter is connected in at least one of the transmitter path and the receiver path of the transceiver to separate signals from adjacent spectrum blocks to permit use of all of the channels in the adjacent spectrum blocks and to separate signals in adjacent or nearby channels in a shared-channel block. A method and system for forward link control signalling are provided. The forward link control signalling includes a frame for transmission that includes at least one control channel that includes control information for receivers sharing a common characteristic, and a guide channel that includes information pertaining to the at least one control channel, including control information for receivers sharing a common characteristic.03-15-2012
20120063371METHOD FOR TRANSMITTING UPLINK SOUNDING REFERENCE SIGNAL FOR LTE SYSTEM - Disclosed are a method and apparatus for transmitting an uplink Sounding Reference Signal (SRS), the method including identifying a number of downlink and uplink switch points within a radio frame N03-15-2012
20120063370COMMUNICATION SYSTEM, APPARATUS AND METHODS FOR PROVIDING AND ACQUIRING A SYSTEM INFORMATION MESSAGE - A network element for a cellular communication system comprises a signal processing logic module arranged to: generate a single system information message; generate a variable si-Windowlength parameter for transmission to the at least one wireless communication unit; and determine availability for downlink transmissions to the at least one wireless communication unit. The network element further comprises a transceiver arranged to transmit the si-Windowlength parameter and the single system information (S1) message to the at least one wireless communication unit in a variable length transmission time window (S1 window) a number of times, wherein the number of transmissions is based on the si-Windowlength parameter; wherein at least one of: a start time of a transmission of the single SI message, or a duration of the variable length transmission time window (SI window), is determined based on: (i) the si-Windowlength parameter; (ii) a transmission order; and (iii) on the availability for downlink transmissions.03-15-2012
20130094409METHOD AND DEVICE FOR OBTAINING CARRIER INFORMATION AND CARRIER INFORMATION INDICATION - A method and device for obtaining carrier information and carrier information indication include: a user equipment obtains parameters of uplink carrier information according to the message sent by a network side in broadcast manner, or, the user equipment obtains parameters of uplink carrier information according to the preset information. Time Division Duplex wireless communication system with asymmetry uplink frequency band and downlink frequency band can be supported effectively, guard frequency band near the intersection occurred when the adjacent frequencies coexist is utilized fully, and frequency spectrum utilization rate is improved; further more, Time Division Duplex wireless communication system with unequal uplink band width and downlink band width can be supported, and the application of the Time Division Duplex system is expanded effectively.04-18-2013
20120093044MULTIBAND WIRELESS APPARATUS - Provided is a multiband wireless apparatus that, even if the number of supported frequency bands increases, suppresses increase in the number of components, and completes cell search within a specified time. In a multiband wireless apparatus (04-19-2012
20120093043MULTI-CELL COMMUNICATION SYSTEM THAT PERFORMS INTERFERENCE CONTROL USING RELAY OF TERMINAL - A multi-cell communication system comprises at least a first base station and first terminal and a second base station and second terminal. When the first and second base stations need to perform interference control, the first terminal may relay a message related to the interference control between the first base station and the second base station. That is, the first terminal may transfer a message related to the interference control from the first base station to the second base station, and a message related to the interference control from the second base station to the first base station. As such, the first base station and the second base station can transmit/receive messages that are for performing interference control via the first terminal.04-19-2012
20120093042ASYMMETRIC TDD IN FLEXIBLE USE SPECTRUM - A method according to an embodiment of the invention includes receiving and transmitting signals over a time division duplex (TDD) communication path. Signals are received over the TDD communication path via a first portion of a first frequency band. The first frequency band is adjacent to a second frequency band and to a third frequency band. The first frequency band is different from the second frequency band and from the third frequency band. A first frequency division duplex (FDD) communication path can be operable in the second frequency band. A second FDD communication path can be operable in the third frequency band. Signals are transmitted over the TDD communication path via a second portion of the first frequency band that is different from the first portion of the first frequency band.04-19-2012
20120093041Signal transmission apparatus, electronic instrument and signal transmission method - A signal transmission apparatus includes: a transmission section adapted to transmit a transmission object signal as a radio wave; a reception section adapted to receive the radio wave transmitted from the transmission section and output an electric signal corresponding to the received radio wave; and a connection section adapted to connect a first housing and a second housing of an electronic instrument pivotably around a center axis; the connection section having a radio signal transmission line formed therein by which wireless transmission can be carried out between the transmission section and the reception section.04-19-2012
20130208634METHOD AND APPARATUS FOR TRANSMITTING UPLINK AND DOWNLINK DATA IN TDD SYSTEM - A method and an apparatus for transmitting uplink/downlink data on Time Division Duplexing (TDD) carriers are provided. The method includes transmitting to a base station in a Primary Cell (PCell) and a Secondary Cell (SCell), a TDD Uplink-Downlink (UL-DL) configuration of the PCell having a DL subframe super-set or UL subset that are common in the SCell and the PCell and a TDD UL-DL configuration differing from each other, receiving data at a first subframe in the SCell, and transmitting, when a UL subframe set of the SCell is a subset of a UL subframe of the PCell, a feedback corresponding to the data at a subframe predefined in association with the first subframe in the PCell according to the TDD UL-DL configuration of the SCell. The method supports both the self-scheduling and cross-carrier scheduling of the UE using carriers of different TDD configurations.08-15-2013
20130208635METHOD AND SYSTEM WHEREIN TIMESLOTS ALLOCATED FOR COMMON CONTROL CHANNELS MAY BE REUSED FOR USER TRAFFIC - A network apparatus for use in a wireless time division duplex (TDD) code division multiple access communication system includes a processor configured to allocate a time slot in a frame for a plurality of cells for transmission of data over a forward access channel (FACH). Each of the plurality of cells is allocated a different time slot in the frame for transmission of the data over the FACH.08-15-2013
20130208636METHOD AND APPARATUS FOR TIME DIVISION DUPLEX COMMUNICATION - Embodiments provide a method and apparatus for performing time division duplex communication, such as may be performed over a wireless communications network. In the embodiments a first circuit pathway is used to transmit a first radio frequency signal in a transmission mode and a second circuit pathway is used to receive a second radio frequency signal in a reception mode. In the reception mode, the first radio frequency signal is switched to an alternate circuit pathway. This may be performed by a radio frequency integrated circuit or by other control circuitry. Switching to an alternate circuit pathway reduces leakage of the first radio frequency signal into the second radio frequency signal.08-15-2013

Patent applications in class Time division