Patent application number | Description | Published |
20080212464 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION IN A SINGLE CARRIER FDMA SYSTEM - Provided is a method and an apparatus for transmitting a large quantity of control information in a mobile communication system. When there is no uplink data to be transmitted, a UE spreads second control information, a quantity of which is less than or equal to a pre-defined threshold, by using a ZC sequence cyclic-shifted according to resource blocks, each of which indicates at least one time interval used for a transmission of the second control information. When there is uplink data to be transmitted, the UE performs TDM of the uplink data with third control information. When there is no uplink data to be transmitted and the quantity of control information exceeds a pre-defined threshold, or when the first control information includes various types of information, the UE spreads the first control information in a time domain by the orthogonal codes. | 09-04-2008 |
20080212506 | DEVICE AND METHOD FOR TRANSMITTING CONTROL CHANNEL WITH PRE-ALLOCATED RESOURCES - The method for an eNodeB transmitting control channels with pre-allocated resources comprising steps of the eNodeB determining whether to transmit the control channels according to its needs; the eNodeB transmitting the control channels with pre-allocated resources according to properties of the signaling to be transmitted. With the method proposed in present invention, operations in a receiving end are simplified so that the time spent in receiving signaling is shortened and power consumption is well reduced. | 09-04-2008 |
20080212532 | APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A SINGLE CARRIER-FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B determines on a cell basis whether to turn or off inter-subband hopping and whether to turn on or off mirroring for a resource unit for the UE on a frequency axis along which at least two subbands are defined, at set hopping times, selects a resource unit by selectively performing inter-subband hopping and mirroring on the resource unit for the UE according to the determination, and allocates the selected resource unit to the UE. | 09-04-2008 |
20080212555 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided, in which different cyclic shift values are generated for different SC-FDMA symbols in one of a slot and a subframe, a sequence allocated for CDM of control information is cyclically shifted by the cyclic shift values, and a control channel signal including the control information is combined with the cyclically shifted sequences on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols. | 09-04-2008 |
20080212556 | APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A SINGLE CARRIER-FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B performs inter-subband hopping on a resource unit for a User Equipment (UE) on a frequency axis along which at least two subbands are defined, at each predetermined hopping time, determines whether to turn on or off mirroring in a subband having the hopped resource unit on a cell basis at the each hopping time, selects a resource unit by selectively mirroring the hopped unit according to the determination, and allocates the selected resource unit to the UE. | 09-04-2008 |
20080225786 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting a control channel of a base station in a mobile communication system. A downlink control channel signal generator generates a downlink control channel signal to be transmitted to a User Equipment (UE). A control channel candidate processor calculates a control channel decoding attempt order according to a state of the downlink channel. A controller determines a control channel candidate to be used, according to the calculated decoding attempt order. A mapper maps the generated control channel signal to the determined control channel candidate. A transmission processor wirelessly transmits the mapped signal. | 09-18-2008 |
20080225964 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FORWARD SHARED CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - A method is provided for transmitting a downlink shared control channel including a control signal necessary for restoring a transmission data signal in a mobile communication system that transmits a data signal using multiple antennas. It is determined whether the transmission data signal is coded with two or more codewords before being transmitted. One of a first element index of a sub-codebook configured only with a one codeword-dedicated precoding in a precoding codebook and a second element index of a sub-codebook configured only with a more-than-two codeword- dedicated precoding is selected, according to the determination result. A control channel is generated by including the selected element index in the precoding information. The generated control channel is mapped to a particular resource block and the mapped control channel is transmitted to a particular reception apparatus. | 09-18-2008 |
20080240274 | PRECODING APPARATUS AND METHOD IN A WIRELESS COMMUNICATION SYSTEM USING MULTIPLE INPUT MULTIPLE OUTPUT - A transmission apparatus in a Multiple Input Multiple Output (MIMO)-based wireless communication system. The transmission apparatus includes at least two antenna groups each having at least two antennas, wherein the antenna groups are spaced apart by a first distance and transmit antennas in each antenna group are spaced apart by a second distance which is shorter than the first distance. A channel coding and modulation unit channel-codes and modulates a desired transmission data stream. A precoding unit precodes the channel-coded and modulated signal separately for each antenna group and each antenna in the same antenna group. Thereafter, a transmission processing unit transmission-processes the output signal from the precoding unit. | 10-02-2008 |
20080267122 | METHOD AND APPARATUS FOR MAPPING/DEMAPPING MODULATION SYMBOLS IN A MOBILE COMMUNICATION SYSTEM - A method for mapping wireless resources of reference symbols for channel state estimation and modulation symbols for user information transmission in a transmitter of an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system is disclosed. The mapping method includes channel-encoding and modulating a user information stream to be transmitted, and then generating a systematic symbol stream and a parity symbol stream; and preferentially arranging systematic modulation symbols in resource elements of a symbol including no reference symbol, and then arranging parity modulation symbols in remaining resource elements. | 10-30-2008 |
20080273479 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNELS BY RESTRICTING A SET OF THE CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a control channel in a base station for a wireless communication system. The base station transmits information including a number of channel elements constituting control channels, to a terminal; establishes a set of control channels that the terminal can receive, within the number of channel elements using an identifier (ID) of the terminal; and transmits control information to the terminal through a selected control channel among the control channels. The terminal is restricted to monitor only a proper number of control channels established without the need to monitor all control channels, thereby reducing reception complexity and avoiding unnecessary battery consumption. | 11-06-2008 |
20080273491 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN AN ORTHOGONAL FREQUENCY MULTIPLEXING SYSTEM - A method and apparatus for transmitting and receiving data in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided, in which a Base Station (BS) generates a signal of a broadcast channel, determines whether the broadcast channel signal includes Reference Symbols (RSs) used for channel estimation, determines to apply a maximal puncturing pattern to a Resource Block that defines the broadcast channel, if the broadcast channel signal includes Rs, includes puncturing information about a downlink signal in the broadcast channel signal, maps the broadcast channel signal including the puncturing information to Resource Elements according to the maximal puncturing pattern, and transmits the mapped broadcast channel signal. | 11-06-2008 |
20080273516 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. A control channel signal is generated by multiplying control symbols carrying control information by a sequence allocated for CDM of the control information. The control channel signal is multiplied by chips of the orthogonal codes on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols. | 11-06-2008 |
20080274749 | APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A resource allocation method and apparatus for downlink transmission of a base station in a mobile communication system. The base station compares the number Ntx of data transmissions with the number Nper of available persistent resource allocations, and allocates resources by at least one of a persistent resource allocation scheme and a dynamic resource allocation scheme according to the comparison result. | 11-06-2008 |
20080285529 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING PILOT SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a pilot signal in a wireless communication system. A reference cell scrambling code or one of a plurality of additional cell scrambling codes is selected for each combination of one of a plurality of first scrambling codes (PSCs) applied to a first synchronization channel (P-SCH) and one of a plurality of second scrambling codes (SSCs) applied to a second synchronization channel (S-SCH). It is determined whether to transmit the pilot signal using the reference cell scrambling code or one of the plurality of additional cell scrambling codes. The reference cell scrambling code or the additional cell scrambling code is generated according to the determination. The pilot signal is transmitted using the generated reference cell scrambling code or the additional cell scrambling code. | 11-20-2008 |
20080293424 | METHOD AND APPARATUS FOR ALLOCATING ACKCH RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method for allocating physical resources to an Acknowledgement (ACK)/Negative Acknowledgement (NACK) signal channel representative of a response signal in a wireless communication system. The method includes grouping ACK/NACK signal channels corresponding to a plurality of resource blocks used for transmission of a data channel or a control channel into a plurality of groups so ACK/NACK signal channels having consecutive indexes do not belong to the same group; and allocating same frequency resources to ACK/NACK signal channels belonging to the same ACK/NACK signal channel group and allocating orthogonal sequences so ACK/NACK signal channels in each ACK/NACK signal channel group are distinguished in a code domain. | 11-27-2008 |
20080298497 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING UPLINK CHANNEL SOUNDING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an uplink Channel Sounding (CS) Reference Signal (RS) channel in a wireless communication system. The method includes transmitting symbols of the CS RS channel through an entire system band in a previously selected at least one of Long Blocks (LBs) constituting one time slot of a subframe; and transmitting symbols of control channels through a predetermined band in LBs remaining after symbols of the CS RS channel are applied in the time slot, by applying an orthogonal sequence determined according to the number of LBs to which symbols of the CS RS channel are applied. | 12-04-2008 |
20080310360 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CHANNEL QUALITY INDICATOR IN COMMUNICATION SYSTEM - A method and apparatus for transmitting/receiving a Channel Quality Indicator (CQI) in a communication system are provided. It is determined whether there is any uplink data to transmit, when a CQI transmission time arrives according to a predetermined CQI transmission period. If there is uplink data to transmit, a part of the uplink data is punctured to insert the CQI therein, and the inserted CQI is multiplexed with the uplink data before transmission. It is determined whether there is any uplink data to receive from a terminal, when a CQI reception time arrives according to a predetermined CQI transmission period. If there is uplink data to receive, the uplink data is received from the terminal, and the received uplink data is demultiplexed to extract the CQI. | 12-18-2008 |
20090003274 | APPARATUS AND METHOD FOR TRANSMITTING CONTROL CHANNEL FOR FREQUENCY RESOURCE ALLOCATION IN A WIRELESS COMMUNICATION SYSTEM - A method is provided for transmitting a control channel for resource allocation to a terminal by a base station in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system. An additional resource allocation indicator is set indicating whether the number of consecutive resource block sets allocated to a terminal is greater than one. A reference control channel is generated including reference resource allocation information for a first consecutive resource block set and the set additional resource allocation indicator. An additional control channel using additional resource allocation information is generated, when there are one or more additional consecutive resource block sets. At least one of the generated reference control channel and the generated additional control channels is encoded before transmission. | 01-01-2009 |
20090003473 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING COMMON CONTROL CHANNELS IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving a common control channel in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system. In the transmission apparatus, when a plurality of bursts are transmitted during a Transmission Time Interval (TTI) of the common control channel, an Inverse Fast Fourier Transform (IFFT) mapper generates bursts that are shifted in a frequency domain by applying a predetermined cyclic shift offset between the bursts, and maps the generated bursts in a resource block. A transmission unit transmits the bursts to a receiver. In the reception apparatus, a reception unit receives a burst, and a combining unit combines the received burst with a burst stored in a buffer. A decoder decodes each of the combined bursts, and upon a successful decoding, detects a TTI start timing of the common control channel from the successfully decoded burst. | 01-01-2009 |
20090003486 | APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for mapping coded data symbols to resources in a mobile communication system. An S/P converter converts a serial signal including user data or control information into a plurality of parallel signals. A DFT unit performs Discrete Fourier Transform (DFT) on the parallel signals output from the S/P converter. A controller controls the DFT unit so that among the signals output from the S/P converter, a control channel is mapped in the maximum available resources to which the control channel can be mapped, among the resources included in a resource block, and data symbols are mapped to the remaining resources, except for the maximum available resources to which the control channel can be mapped. A subcarrier mapper allocates the signals output from the DFT unit to subcarriers. An RF processor converts a signal output from the subcarrier mapper into a radio signal. | 01-01-2009 |
20090010173 | APPARATUS AND METHOD FOR DISCONTINUOUS RECEPTION IN MOBILE TELECOMMUNICATION SYSTEM - A communication apparatus and method for performing discontinuous reception in a mobile communication system is provided. The communication apparatus continues to turn on a receiver during a reception-on (Rx-on) period associated with persistent resource allocation to receives a packet, and receives a retransmission packet transmitted through the persistent resources at the Rx-on period spaced from the Rx-on period by a processing time of the retransmission packet given taking into account feedback information determined according to a reception error of the packet. | 01-08-2009 |
20090040976 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING PACKETS IN A MOBILE COMMUNICATION SYSTEM SUPPORTING HYBRID AUTOMATIC REPEAT REQUEST - An apparatus and method for transmitting and receiving packet data in a mobile communication system supporting Hybrid Automatic Repeat reQuest (HARQ), e.g., a method and apparatus for performing HARQ retransmission on a packet received through persistent resources where no HARQ process identifier is transmitted. HARQ soft combining is performed by providing a mapping relation between a packet received through persistent resources and a retransmitted HARQ packet. In addition, when there are several HARQ packets received through persistent resources at an arbitrary timing, which packet an arbitrary retransmission packet should be combined is determined, thereby enabling the corresponding processor to perform correct soft combining. This improves HARQ performance of persistent resources without increasing complexity of the reception apparatus. | 02-12-2009 |
20090046646 | APPARATUS AND METHOD FOR ALLOCATING CODE RESOURCES TO UPLINK ACK/NACK CHANNELS IN A CELLULAR WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for allocating code resources to ACK/NACK channel indexes, when UEs need ACK/NACK transmission in a wireless communication system in which a predetermined number of orthogonal cover Walsh codes is selected from among available orthogonal cover Walsh codes, at least one subset is formed, having the selected orthogonal cover Walsh codes arranged in an ascending order of cross interference, subsets are selected for use in first and second slots of a subframe, and the orthogonal cover Walsh codes of the subset selected for each slot and ZC sequence cyclic shift values are allocated to the ACK/NACK channel indexes. | 02-19-2009 |
20090055703 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING THE HYBRID-ARQ ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for transmitting/receiving a Hybrid Automatic Repeat reQuest (HARQ) Acknowledge/Negative acknowledge (ACK/NACK) signal in a mobile communication system. The present invention distributes a CDM segment, to which an ACK/NACK signal is mapped, in the frequency domain of an OFDM symbol, and repeatedly transmits the CDM segment, thereby providing diversity gain in the time-frequency domain. Further, the present invention provides a mapping rule for distributing transmit power between OFDM symbols to which the ACK/NACK signal is mapped and transmitted, thereby preventing the case where a particular OFDM symbol is power-overloaded, and thus contributing to improvement of the entire system performance. | 02-26-2009 |
20090097447 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES OF A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING - A method is provided for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The method includes, when a time index and a frequency index of available Resource Elements (REs) are defined as l and k, respectively, dividing the available REs in a two-dimensional structure of (k, l); and time-first-allocating each RE to a plurality of RE groups while increasing the time index l for each frequency index k from an initial value up to a predetermined range. | 04-16-2009 |
20090100300 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method to which time-first-mapping is applied for a plurality of channel-coded and rate-matched code blocks considering a modulation scheme in a mobile communication system is provided. The interleaving method includes determining sizes of a horizontal area and a vertical area of an interleaver memory, selecting a defined number of adjacent coded symbols in a same code block according to a modulation scheme, generating modulation groups in a vertical direction, sequentially writing the modulation groups in the horizontal area on a row-by-row basis, and sequentially reading the symbols written in the interleaver memory on a column-by-column basis. | 04-16-2009 |
20090175248 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING ENHANCED RACH IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting an enhanced Random Access CHannel (RACH) in a User Equipment (UE) in a mobile communication system is provided, in which the UE transmits an uplink preamble to a Node B and upon receipt of an ACKnowledgment (ACK) for the uplink preamble, transmits an Enhanced Uplink Dedicated CHannel (E-DCH) and a Dedicated Physical Control CHannel (DPCCH) to the Node B. The transmission of the DPCCH starts before the transmission of the E-DCH. | 07-09-2009 |
20090196235 | Method And Apparatus For Setting Gain Factors For Dedicated Physical Channels In A Mobile Telecommunications System - An apparatus and method are provided for setting gain factors for dedicated physical channels in a mobile communication system. The UE receives configuration information indicating uplink dedicated physical channel configuration. The UE sets a gain factor of a dedicated physical control channel (DPCCH) to 1 in the case that no DPDCH is configured. The UE calculates a gain factor of a enhanced dedicated physical control channel (E-DPCCH) using the gain factor of the DPCCH. | 08-06-2009 |
20090213814 | METHOD AND APPARATUS FOR PROVIDING UPLINK PACKET DATA SERVICE IN ASYNCHRONOUS WCDMA SYSTEM - Disclosed is a method and apparatus for providing uplink packet data services through an E-DCH in an asynchronous WCDMA system. A transport block size (TBS) for transmitting uplink transport channel data is determined. A combination of a spreading factor and a modulation scheme for uplink channel data transmission, corresponding to the determined TBS, is selected according to transmittable physical channel data bit sizes and puncturing limit values. The TBS is transmitted by incorporating it into control information of the uplink transport channel data. The modulation scheme and spreading factor combination is determined based on a physical channel data bit size that maximizes transmission efficiency and minimizes the number of punctured bits, without requiring an additional physical channel in transmitting the uplink data having the TBS. This method maximizes uplink transmission efficiency to save transmission resources and reduces signaling overhead required to transmit E-DCH control information. | 08-27-2009 |
20090245209 | APPARATUS AND METHOD FOR ALLOCATING OVSF CODES AND I/Q CHANNELS FOR REDUCING PEAK-TO-AVERAGE POWER RATIO IN TRANSMITTING DATA VIA ENHANCED UP-LINK DEDICATED CHANNELS IN WCDMA SYSTEMS - An apparatus and method in which an Enhanced Uplink Dedicated transport CHannel (EUDCH) is used in a Wideband Code Division Multiple Access (WCDMA) system is provided. In a User Equipment (UE), when physical channels for transmitting EUDCH data are transmitted in addition to existing physical channels, a Peak-to-Average Power Ratio (PAPR) of an uplink transport signal increases. The increase in PAPR depends upon Orthogonal Variable Spreading Factor (OVSF) codes allocated to the corresponding physical channels and In-phase/Quadrature-phase (I/Q) channels. Therefore, the apparatus and method allocate optimum OVSF codes and I/Q channels to EUDCH-related physical channels in order to minimize an increase in PAPR due to EUDCH. | 10-01-2009 |
20090245412 | Method and Apparatus for Multiplexing Data and Control Information in Wireless Communication Systems Based on Frequency Division Multiple Access - An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in a predetermined symbol block period within one TTI when control information to be transmitted exists in the TTI, an FFT unit for performing FFT on the symbol block, and an IFFT unit for performing IFFT on signals output from the FFT unit and then transmitting the signals. The symbol block includes the control information and data to be transmitted. The TTI includes multiple symbol block periods. | 10-01-2009 |
20090316756 | APPARATUS AND METHOD FOR TRANSMISSION OF SOUNDING REFERENCE SIGNAL IN UPLINK WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS AND SOUNDING REFERENCE SIGNAL HOPPING - A sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal using the multiple antenna technique is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. Moreover, the sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. The sounding reference signal is transmitted through an antenna pattern in which the sounding reference signal can be transmitted through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead in this environment. | 12-24-2009 |
20090323639 | FAST SERVING CELL CHANGE METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM - A serving cell change method and apparatus is provided for efficiently performing the serving cell change in a mobile communication system. The UE receives a cell change control information including an activation time from a serving cell, when a downlink channel status of the serving cell is inferior to a downlink channel status of a target cell, reports a measurement result to the serving cell while performing data communication with the serving cell, monitors receipt of a cell change indicator transmitted by the target cell before the expiration of the activation time while performing the data communication with the serving cell, and when the cell change indicator is received, communicates data with the target cell by sending an acknowledgement in response to the cell change indicator and switching to the target cell. | 12-31-2009 |
20100002674 | Method for configuring gain factors for uplink service in radio telecommunication system - A method for configuring gain factors in a WCDMA telecommunication system is provided in which the gain factor for defining power required for normal reception of uplink data in an environment supporting an uplink service over an E-DCH can be configured using minimal signaling information. First gain factors for first TFs corresponding to a part of a TF set including a plurality of TFs available for an uplink service are received. One of the first TFs is determined as a reference TF for a second TF other than the first TFs in the TF set. Then, a second gain factor for the second TF is calculated using the first gain factor for the determined reference TF. The second gain factor is used for transmitting or receiving uplink data. | 01-07-2010 |
20100034114 | CQI REPORTING METHOD AND APPARATUS FOR MOBILE TELECOMMUNICATION SYSTEM - A CQI reporting method for a Dual-Cell HSDPA service of a mobile communication system is provided for reducing CQI reporting overhead. A user terminal transmits channel quality indicators for downlink channels in a mobile communication system, measures channel qualities of a first downlink channel and a second downlink channel, compares the channel qualities of the first and second downlink channels with each other, selects at least one channel quality of the first and second downlink channels, and transmits at least one channel quality indicator indicating the at least one channel quality. | 02-11-2010 |
20100034176 | METHOD AND APPARATUS FOR DYNAMICALLY ACTIVATING AND DEACTIVATING A SUPPLEMENTARY CELL FOR A WCDMA SYSTEM - A method and apparatus for dynamically activating and deactivating a supplementary cell in Dual-Cell HSDPA service of a Universal Mobile Communication Service (UMTS) system. In a supplementary cell activation and deactivation method, a user equipment receives a supplementary cell activation command from a base station; compares an uplink transmission power with a predetermined threshold value; transmits a supplementary cell activation reply, when the uplink transmission power is equal to or greater than the threshold value; and transmits a supplementary cell deactivation reply, when the uplink transmission power is less than the threshold value. | 02-11-2010 |
20100039970 | METHOD AND APPARATUS FOR SUPPORTING MULTIPLE REFERENCE SIGNALS IN OFDMA COMMUNICATION SYSTEMS - Methods and apparatuses are described for a Node B to transmit Reference Signals (RS) from multiple antennas to enable User Equipments (UEs) to perform demodulation of received information signals and to estimate Channel Quality Indication (CQI) metrics. To minimize overhead and enable backward compatible operation with legacy systems, RS from a first set of Node B antennas are transmitted in every transmission time interval and substantially over the whole operating BandWidth (BW). RS from a second set of Node B antennas serving for CQI estimation are periodically transmitted, substantially over the whole operating BW, with transmission period informed to UEs through broadcast signaling by the Node B and starting transmission sub-frame determined from the identity of the cell served by the Node B. RS from the second set of antennas, and new RS from the first set of antennas, serving for demodulation of information signals have substantially the same BW as the information signals which can be smaller than the operating BW. | 02-18-2010 |
20100074216 | METHOD OF MANAGING RADIO RESOURCES AND NODE B APPARATUS IMPLEMENTING THE SAME - A method of managing radio resources and a Node B implementing the same are provided. If the total radio resources used in a cell exceed target radio resources signaled by an RNC, uplink rates are equally allocated to primary UEs and non-primary UEs by controlling the signal strengths of the primary and non-primary UEs. | 03-25-2010 |
20100103899 | Method and apparatus for signaling user equipment status information for uplink packet transmission in a soft handover region - A method and apparatus are provided for transmitting user equipment (UE) status information in communication with one serving Node B and at least one non-serving Node B in a mobile communication system. The method and apparatus comprise generating transport channel data including UE status information; transmitting the transport channel data to the serving Node B and the at least one non-serving Node B, receiving a response signal for the transport channel data from the serving Node B, and retransmitting the transport channel data if the response signal received from the serving Node B is a non-acknowledge (NACK) signal, and ending the retransmission of the transport channel data if the response signal received from the serving Node B is an acknowledge (ACK) signal. | 04-29-2010 |
20100111107 | DEVICE AND METHOD FOR TRANSMITTING DOWNLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A Downlink Control Information (DCI) processing device and method for a wireless communication system that encodes/decodes downlink control information based on a payload size of DCI format. The method includes determining a payload size of a first DCI format; and determining a payload size of a second DCI format by appending padding bits to the second DCI format until the payload size of the second DCI format is not an ambiguous size and is not equal to the payload size of the first DCI format. | 05-06-2010 |
20100195604 | CONTROL SIGNALING FOR TRANSMISSIONS OVER CONTIGUOUS AND NON-CONTIGUOUS FREQUENCY BANDS - Methods and apparatus are provided for constructing scheduling assignments for transmission, by a User Equipment (UE), of data signals over a single contiguous bandwidth and multiple non-contiguous clusters of contiguous bandwidth. The scheduling assignments for each transmission structure are designed to always result into the same maximum number of decoding operations the UE needs to perform to receive the scheduling assignments. The data signal transmission over the single contiguous bandwidth can be with or without frequency hopping and the data signal transmission over the multiple non-contiguous clusters of contiguous bandwidth may always be without frequency hopping. | 08-05-2010 |
20100232285 | METHOD AND APPARATUS FOR ALLOCATING BACKHAUL TRANSMISSION RESOURCE IN WIRELESS COMMUNICATION SYSTEM BASED ON RELAY - In a relay based wireless communication system, a method for transmitting an uplink backhaul of a relay node includes obtaining scheduling information for an uplink backhaul sub-frame through a downlink backhaul control channel from a base station, and performing a rate matching and mapping of data by regarding at least one predefined symbol as a blank symbol. The predefined symbol is located at a front part or a rear part of the scheduled uplink backhaul sub-frame. The transmitting method further includes performing a multiplexing of the uplink backhaul sub-frame, and transmitting the multiplexed uplink backhaul sub-frame. This method can eliminate an overlap of transmission and reception timing in a relay node due to an RF transmission/reception switching time delay. Also, the method can make better use of wireless backhaul resources and minimize an influence on conventional systems by offering the compatibility with conventional uplink and downlink sub-frame structures. | 09-16-2010 |
20100260156 | Apparatus and method for transmitting system information block in a broadband wireless communication system - An operation method of the femto BS includes configuring a subframe set including at least two types of subframes among subframes having predefined different structures, and, if a duration of a subframe carrying the subframe set arrives, transmitting one of the subframes included in the subframe set according to predefined order. The subframes having the predefined different structures include a first type subframe including a synchronization signal and a Master Information Block (MIB), a second type subframe including the synchronization signal, a third type subframe including the synchronization signal and system information, a fourth type subframe including the synchronization signal, the MIB, and the system information, and a fifth type subframe including the system information. | 10-14-2010 |
20100265921 | METHOD AND APPARATUS FOR PROVIDING UPLINK PACKET DATA SERVICE IN ASYNCHRONOUS WCDMA SYSTEM - A method and apparatus are provided for providing a packet data service in an asynchronous Wideband Code Division Multiple Access (WCDMA) system. A combination of physical channel elements are determined based on combinations of physical channel elements and a first Puncturing Limit (PL). Packet data is transmitted using the determined physical channel elements. A second PL is used for a maximum combination of physical channel elements when no combination of physical channel elements are available to satisfy the first PL. | 10-21-2010 |
20100318871 | APPARATUS AND METHOD FOR RESOURCE ALLOCATION INFORMATION TRANSMISSION IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band. | 12-16-2010 |
20100322343 | COMMUNICATION METHOD AND APPARATUS USING CODEBOOK IN MIMO SYSTEM - A method and apparatus for transmitting and receiving signals using a codebook which maps each codeword to at least two different antennas is provided for a MIMO system. A transmission method includes mapping multiple codewords to multiple layers; mapping the multiple layers to multiple antennas using a precoding matrix selected from a rank-3 codebook which is designed to map the codewords to different antennas; and transmitting the codewords through paths formed by mapping the layers and the antennas. The precoding matrix of the rank-3 codebook is designed to equalize transmit power ratios between the antennas. The communication method and apparatus is advantageous to solve the problem of transmit power imbalance among the layers and the problem of performance degradation at the high SNR region in the conventional system using the rank-3 precoding matrices. | 12-23-2010 |
20110019755 | DATA TRANSMISSION METHOD AND APPARATUS BASED ON JOINT SPACE DIVISION MULTIPLE ACCESS TECHNOLOGY IN COLLABORATIVE DOWNLINK MIMO SYSTEM - A channel condition information feedback method and apparatus are provided for a collaborative wireless communication network using a multiple input multiple output antenna system. The apparatus includes a downlink channel estimator that estimates channels of adjacent base stations, groups base stations from among the adjacent base stations that are capable of collaborative communication, and obtains a maximum singular vector to base stations belonged to a same group; and a vector selector which selects a weight io vector most accurately representing the maximum singular vector and a complex variable most accurately representing the maximum singular vector in combination with the weight vector. | 01-27-2011 |
20110032884 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING AN UPLINK ACKNOWLEDGEMENT CHANNEL FOR A DOWNLINK DATA CHANNEL IN A MOBILE COMMUNICATION SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS - A communication apparatus and method of a mobile communication system using Orthogonal Frequency-Division Multiple Access (OFDMA). A method of transmitting an uplink acknowledge channel (ACKCH) for a downlink data channel in a mobile communication system using OFDMA includes: determining channel resources for each Control Channel Element (CCE), when a downlink control channel including at least two CCEs is received; generating uplink acknowledgement information by analyzing a received downlink data channel; assigning the at least two CCEs to at least two transmission antennas, respectively; and transmitting the uplink ACKCH including the uplink acknowledgement information through the transmission antennas. | 02-10-2011 |
20110085483 | METHODS FOR POWER HEADROOM REPORTING, RESOURCE ALLOCATION, AND POWER CONTROL - A method and apparatus for power headroom reporting are provided. The power headroom reporting method for a mobile terminal may include determining whether a Physical Uplink Shared Channel (PUSCH) transmission and a Physical Uplink Control Channel (PUCCH) transmission are allowed to occur in a same subframe; determining whether an event for requesting power headroom reporting is generated; and reporting a first power headroom and a second power headroom to a base station. | 04-14-2011 |
20110090858 | METHOD AND APPARATUS FOR ALLOCATING COMMUNICATION RESOURCES USING VIRTUAL CIRCUIT SWITCHING IN A WIRELESS COMMUNICATION SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN A MOBILE STATION USING THE SAME - A method and apparatus using Virtual Circuit Switching (VCS) in a new scheme are provided for allocating and employing resources by combining Circuit Switching (CS) and Packet Switching (PS), in which a base station allocates resources of a dedicated channel using the CS to a user and then transmits data on the dedicated channel. When data is not transmitted to the user, the base station allocates the allocated dedicated channel resources for resources of a shared channel and transmits data of a different user. Therefore, system capacity can be increased and a waste of communication resources can be minimized in a wireless communication system for frequently transmitting a small amount of traffic that is sensitive to a delay time. | 04-21-2011 |
20110149916 | METHOD AND APPARATUS FOR SCHEDULING UPLINK RATES ADAPTIVELY TO FAST RATE RAMPING IN A PACKET COMMUNICATION SYSTEM - A method and apparatus are provided for transmitting uplink rate assignment information for an uplink data transmission to a User Equipment (UE) by a Node B in a mobile communication system. The uplink rate assignment information to be transmitted for each UE is determined. The uplink rate assignment information is transmitted to the UE. The uplink rate assignment information is attached with a UE ID-specific Cyclic Redundancy Check (CRC) of the UE when directly indicating an uplink rate grant for the UE. | 06-23-2011 |
20110159907 | METHOD AND APPARATUS FOR SENDING AND RECEIVING CHANNEL STATE INFORMATION IN MULTIPLE-INPUT MULTIPLE-OUTPUT NETWORK WIRELESS COMMUNICATION SYSTEMS - A method and an apparatus for sending and receiving channel state information in network Multiple-Input Multiple-Output (MIMO) wireless communication systems are provided. Hybrid feedback technology is provided to transfer complete Channel State Information (CSI) to a transmitter by efficiently combining limited amounts of long-term channel information and short-term channel information are in a down link MIMO network system. | 06-30-2011 |
20110170533 | METHOD AND APPARATUS FOR MULTIPLEXING DATA AND CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS BASED ON FREQUENCY DIVISION MULTIPLE ACCESS - An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in a predetermined symbol block period within one TTI when control information to be transmitted exists in the TTI, an FFT unit for performing FFT on the symbol block, and an IFFT unit for performing IFFT on signals output from the FFT unit and then transmitting the signals. The symbol block includes the control information and data to be transmitted. The TTI includes multiple symbol block periods. | 07-14-2011 |
20110188433 | METHOD OF MANAGING RADIO RESOURCES AND NODE B APPARATUS IMPLEMENTING THE SAME - A method of managing radio resources and a Node B implementing the same are provided. If the total radio resources used in a cell exceed target radio resources signaled by an RNC, uplink rates are equally allocated to primary UEs and non-primary UEs by controlling the signal strengths of the primary and non-primary UEs. | 08-04-2011 |
20110261769 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE OF CONTROL CHANNELS IN OFDM-BASED HIERARCHICAL CELLULAR SYSTEM - A method and apparatus for controlling inter-cell interference of control channels of hierarchical cells in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) are provided. The inter-cell interference control method of a base station in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) includes transmitting a broadcast channel, including information on an available bandwidth that is a part of an entire bandwidth, to a terminal, transmitting a control channel including data channel allocation information for the entire bandwidth to the terminal, and transmitting a data channel, as informed by the data channel allocation information, to the terminal. The inter-cell interference control method and apparatus support cooperative transmission of hierarchical cells while maintaining both backward compatibility and forward compatibility. | 10-27-2011 |
20110267995 | Apparatus 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 |
20110300854 | METHOD OF CONTROL INDICATION IN MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEMS - Multiple Transport Blocks (TBs) or data streams are provided in Multi-Input-Multi-Output (MIMO) wireless communication systems herein. The base station (eNB) controls and schedules all downlink and uplink transmission to and from User Equipments, which need to receive an uplink grant from BS/eNB before they transmit. The uplink grant is carried as one of the control indication message in the downlink. The BS/eNB also transmits ACK/NACK information in the HARQ indication channel to the UE for each of the transport blocks. The UE detects the control indication to determine the actual uplink scheduling, as well as the HARQ indication. A method of transmitting a control indication message, which contains a detailed transmit format for one of the TBs to be transmitted, while allowing simultaneous communications on the other TBs is also enclosed. | 12-08-2011 |
20110319068 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CSI IN CELLULAR COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A Channel Status Information (CSI) transmission method and apparatus of a terminal are provided for use in a wireless communication system. In the wireless communication system supporting carrier aggregation, the terminal transmits the CSIs of component carriers without conflict of their transmission time points, resulting in an improvement of system performance. In a case where the transmission time points are determined to overlap unavoidably, the terminal transmits the CSI as compressed. | 12-29-2011 |
20120044901 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A MOBILE COMMUNICATION SYSTEM SUPPORTING UPLINK PACKET DATA SERVICE - A method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting an uplink packet data service are provided. To transmit packet data in an HARQ mobile communication system, a second transceiver receives an RG as rate control information from a first transceiver. The second transceiver sets the allowed maximum data rate of an HARQ process to which the RG is applied to the allowed maximum data rate of an HARQ process previous to the HARQ process, if the RG indicates hold. The second transceiver transmits packet data within the set allowed maximum data rate to the first transceiver. | 02-23-2012 |
20120057523 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BACKHAUL SUBFRAME CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting a backhaul sub frame channel of a base station in a wireless communication system. The method for transmitting a backhaul sub frame channel according to one embodiment of the present invention comprises: creating a downlink relay control channel by coding downlink relay control information that is transmitted to a relay; allocating the created downlink relay control channel to a first slot of a semi-static resource region that is allocated to the relay; and transmitting, to the relay, a backhaul sub frame to which the channel is allocated. Compared to existing control channel transmission techniques, the present invention can minimize overheads. Moreover, the present invention also reduces control channel resources required during retransmission and for the transmission of multiple backhaul subframes. | 03-08-2012 |
20120063405 | METHOD FOR ALLOCATING RESOURCE IN LTE SYSTEM - The present invention relates to a fractional RB (Resource Block) allocation method which enables resource allocation in a unit smaller than RB to improve the capacity of VoIP (Voice over Internet Protocol) in an LTE (Long Term Evolution) system. That is, the present invention introduces a resource arrangement method which allows different users to share the same resource, without even using an SDMA, and a method for informing the fractional RB allocation and how to use the same. A method for introducing multiplexation into an RB and changing the RE arrangement is proposed to support the downlink fractional RB allocation. A method for changing the RE arrangement is also proposed to support the uplink fractional RB allocation. According to the present invention, to provide a consistent service with a small amount of traffic generated as in the VoIP, resources of a smaller amount than a single RB can be used for a terminal with a good channel state. In the present invention, the occupancy of resources for the terminals of an excellent channel state is reduced so that the capacity of the VoIP can be improved. | 03-15-2012 |
20120099546 | METHOD AND APPARATUS FOR ALLOCATING AND SIGNALING ACK/NACK RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus are provided for receiving a physical downlink control channel in a wireless communication system. The physical downlink control channel is received. The physical downlink control channel is decoded. A scheduling type is determined using scheduling type information in the physical downlink control channel. Scheduling information is determined for a data channel according to the scheduling type. | 04-26-2012 |
20120113812 | RESOURCE MANAGEMENT SYSTEM AND METHOD FOR INTER-CELL INTERFERENCE COORDINATION IN WIRELESS COMMUNICATION SYSTEM - A resource management system and method for inter-cell interference coordination and channel information feedback in a mobile communication system are provided. The resource management method includes transmitting an Almost Blank Subframe (ABS) set from a first base station to a second base station, transmitting a reference resource configuration set for channel measurement and a Radio Link Monitor/Radio Resource Measurement (RLM/RRM) for radio resource measurement from the second base station to a terminal, and scheduling, at the second base station, the terminal in a subframe selected from the ABS set. | 05-10-2012 |
20120122515 | METHOD AND APPARATUS FOR COMMUNICATING WITH BASE STATION BASED ON SPEED OF USER EQUIPMENT IN MOBILE COMMUNICATION SYSTEM - Provided is a method for performing communication with a network by a User Equipment (UE) based on its speed information in the network in which at least one portion includes at least one micro cell overlapping at least one macro cell. The method includes measuring, by the UE, its moving speed; and performing at least one of feedback, measurement report, random access and UE capability report to the network by considering the measurement result. | 05-17-2012 |
20120127878 | ANTENNA ALLOCATION APPARATUS AND METHOD FOR CELLULAR MOBILE COMMUNICATION SYSTEM - A method and apparatus for selecting and allocating antennas efficiently are provided. The method includes transmitting, to a User Equipment (UE), information indicating a configuration of a plurality of Channel Status Information Reference Signals (CSI-RSs) through UE specific signaling during an initial access attempt with the UE; receiving, from the UE, CSI-RS measurement results indicating configured CSI-RSs; transmitting CSI-RSs corresponding to a set of available distributed ports (D-ports) based on received signal strength information included in results of the CSI-RS measurement; and determining a CSI-RS of a selected D-port set for use in communications based on feedback information received from the UE. | 05-24-2012 |
20120128095 | APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting data information and control information by a transmitter in a communication system is provided. The method includes identifying an amount of resources to be used for control channel transmission within a predetermined maximum amount of resources available for control channel transmission among total resources of a subframe; mapping control information onto the identified amount of resources to be used for the control channel transmission; mapping data information onto all remaining resources of the subframe, other than the identified resources used for the control channel transmission among the total resources; and transmitting information related to the amount of resources to be used for the control channel transmission, through a predetermined control channel; and transmitting the mapped control information, and the mapped data information. | 05-24-2012 |
20120129566 | UPLINK TRANSMISSION POWER CONTROL METHOD AND APPARATUS FOR A DISTRIBUTED ANTENNA MOBILE COMMUNICATION SYSTEM - An uplink power control method and apparatus of a terminal in a mobile communication system are provided. The method includes receiving, by the terminal, a location parameter corresponding to at least one antenna selected among a plurality of antennas distributed in a service area of a base station, each of the plurality of antennas being connected to the base station; and calculating uplink power based on the location parameter. | 05-24-2012 |
20120176956 | COMMUNICATION SYSTEM WITH RELAYS AND COMMUNICATION THEREIN VIA MULTI-CARRIERS - A system and method is for transmitting multi-carriers in a wireless communication system with a relay are provided. The method includes configuring each of downlink carriers that form the multi-carriers as at least one general sub-frame and at lest one backhaul sub-frame; determining one of the downlink carriers that has a maximum number of backhaul sub-frames, as a primary carrier, and other downlink carriers as sub-carriers; and altering a backhaul sub-frame into a general sub-carrier in the sub-carrier, in response to a general sub-frame of the primary carrier. | 07-12-2012 |
20120176989 | CONTROL SIGNALING FOR TRANSMISSION OVER CONTIGUOUS AND NON-CONTIGUOUS FREQUENCY BANDS - Methods and apparatus are provided for constructing scheduling assignments for transmission, by a User Equipment (UE), of data signals over a single contiguous bandwidth and multiple non-contiguous clusters of contiguous bandwidth. The scheduling assignments for each transmission structure are designed to always result into the same maximum number of decoding operations the UE needs to perform to receive the scheduling assignments. The data signal transmission over the single contiguous bandwidth can be with or without frequency hopping and the data signal transmission over the multiple non-contiguous clusters of contiguous bandwidth may always be without frequency hopping. | 07-12-2012 |
20120188971 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING PACKETS IN A MOBILE COMMUNICATION SYSTEM SUPPORTING HYBRID AUTOMATIC REPEAT REQUEST - An apparatus and method for transmitting and receiving packet data in a mobile communication system supporting Hybrid Automatic Repeat reQuest (HARQ), e.g., a method and apparatus for performing HARQ retransmission on a packet received through persistent resources where no HARQ process identifier is transmitted. HARQ soft combining is performed by providing a mapping relation between a packet received through persistent resources and a retransmitted HARQ packet. In addition, when there are several HARQ packets received through persistent resources at an arbitrary timing, which packet an arbitrary retransmission packet should be combined is determined, thereby enabling the corresponding processor to perform correct soft combining This improves HARQ performance of persistent resources without increasing complexity of the reception apparatus. | 07-26-2012 |
20120188977 | METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION SIGNALS IN AN OFDM BASED CELLULAR COMMUNICATIONS SYSTEM - Provided is a method and apparatus for transmitting a synchronization signal for cell search in an Orthogonal Frequency Division Multiplexing (OFDM) communications system. The method includes acquiring Primary Synchronization CHannel (P-SCH) sequence and Secondary Synchronization CHannel (S-SCH) sequence; mapping the P-SCH sequence and the S-SCH sequence onto subcarriers; generating OFDM symbols including the P-SCH sequence and the S-SCH sequence mapped onto subcarriers; and transmitting the OFDM symbols, wherein a frame comprising a plurality of OFDM symbols, a part of the plurality of OFDM symbols in the frame is used for transmitting Synchronization CHannel (SCH) comprising P-SCH and S-SCH, and wherein the P-SCH and the S-SCH are mapped to adjacent OFDM symbols and the S-SCH is mapped to subcarriers with a predetermined interval in a frequency domain within an OFDM symbol. | 07-26-2012 |
20120195278 | METHOD AND APPARATUS FOR SCHEDULING ASSIGNMENT OF UPLINK PACKET TRANSMISSION IN MOBILE TELECOMMUNICATION SYSTEM - Methods and apparatus are provided for communication between a User Equipment (UE) and a Node B in a communication system. The UE generates a Media Access Control-Protocol Data Unit (MAC-PDU) including scheduling information having information representing an amount of packet data to be transmitted. The MAC-PDU including the scheduling information is transmitted to the Node B. The information representing the amount of packet data exists per priority queue. | 08-02-2012 |
20120201327 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING THE HYBRID-ARQ ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - An apparatus and method are provided for mapping control information to a multiple antenna array to transmit the control information in a mobile communication system. The method includes spreading the control information with an orthogonal sequence according to a spreading factor; and mapping the spread control information to the multiple antenna array based on a repetition index and a Physical Hybrid Automatic Repeat reQuest (HARQ) Indicator CHannel (PHICH) group index. The spread control information is mapped to the multiple antenna array in an alternating pattern in accordance with the repetition index. | 08-09-2012 |
20120230285 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNELS BY RESTRICTING A SET OF THE CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for transmitting control information in a base station for a wireless communication system. The method includes transmitting, to a terminal, information associated with a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols carrying control channels; determining a set of control channel candidates based on an IDentifier (ID) of the terminal; selecting at least one control channel candidate from among the set of control channel candidates; and transmitting the control information to the terminal through the selected at least one control channel candidate. Each control channel candidate included in the set of control channel candidates consists of one, two, four, or eight control channel elements (CCEs) existing in the OFDM symbols. | 09-13-2012 |
20120243490 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING AN UPLINK ACKNOWLEDGEMENT CHANNEL FOR A DOWNLINK DATA CHANNEL IN A MOBILE COMMUNICATION SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS - A communication apparatus and method of a mobile communication system. A method of transmitting an uplink acknowledge channel (ACKCH) for a downlink data channel in a mobile communication system includes: | 09-27-2012 |
20120263143 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES OF A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING - A method is provided for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The method includes, when a time index and a frequency index of available Resource Elements (REs) are defined as | 10-18-2012 |
20120269160 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - Methods and apparatus are provided for transmitting control information in an SC-FDMA system. A UE generates a random cyclic shift value based on an SC-FDMA symbol index and a slot index. The UE cyclically shifts a sequence by the random cyclic shift value. The UE multiplies a control channel signal, including the control information, by the cyclically shifted sequence on an SC-FDMA symbol basis. The UE transmits the multiplied control channel signal in an SC-FDMA symbol to a Node B. | 10-25-2012 |
20120276895 | INITIAL ACCESS METHOD AND APPARATUS OF USER EQUIPMENT USING POWER REDUCTION REQUEST IN HETEROGENEOUS NETWORK - An initial access method of a user equipment (UE) and an apparatus performing the same are provided. The initial access method of a user equipment attempting access a macro cell base station in a network with which the macro cell base station and at least one Femto cell base station share, includes: receiving a cell ID from the macro cell base station or the Femto cell base station; transmitting an interference control request message to the Femto call base station when the received cell ID is a Femto cell ID; and receiving a macro cell ID provided from the macro cell base station when an interference control response message is received from the Femto cell base station to attempt an initial access. When a macro UE near to a Femto cell base station attempts to access a macro cell, it searches an ID of the macro cell through interference control from the Femto call base station to achieve initial access. | 11-01-2012 |
20120307819 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method to which time-first-mapping is applied in a mobile communication system is provided. The interleaving method includes writing coded bits into an interleaver on a row-by-row basis, and reading the coded bits written in the interleaver on a column-by-column basis, wherein the coded bits are written by groups having a size according to a modulation order | 12-06-2012 |
20120320863 | WIRELESS COMMUNICATION SYSTEM AND METHOD FOR RETRANSMISSION PROCESS THEREOF - The objective of the present invention is to control the HARQ process for two codewords assigned to each UE in downlink of the LTE-A system efficiently. In the proposed method, particularly when one of the two codewords is decoded successfully but the other is not in the HARQ process, the UE can be scheduled for both the retransmission and initial transmission by means of the control signal of PDCCH or ACK/NACK information of PHICHs. The proposed method is capable of reducing resource amount necessary for the control signal transmission without increasing the PDCCH decoding complexity of the UE. | 12-20-2012 |
20130083758 | METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for reporting Channel State Information (CSI) for operation of a network, when a Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI) cannot be calculated. The method includes reporting a first Precoding Matrix Indicator (PMI); detecting that a Rank Indicator (RI) is changed before a second PMI is reported, the RI being changed within an RI group; calculating the second PMI and a Channel Quality Indicator (CQI) using the first PMI; and reporting the second PMI and the CQI. | 04-04-2013 |
20130088984 | METHOD AND APPARATUS FOR GENERATING FEEDBACK IN A COMMUNICATION SYSTEM - A method and an apparatus are provided for generating feedback in a communication system. The method includes receiving information about first Evolved Node Bs (ENBs) and a threshold for the first ENBs, which are powered off at a specific time; measuring a channel status for each of second ENBs, which are subject to channel status measurement; selecting a third ENB having an optimal channel status from among the second ENBs, based on the measured channel statuses; generating first feedback information including a cell index and channel status information for the third ENB; measuring a channel status for each of the second ENBs, while the first ENBs are powered off; selecting a fourth ENB having an optimal channel status from among the second ENBs, based on the measured channel statuses; and generating second feedback information including a cell index and channel status information for the fourth ENB. | 04-11-2013 |
20130114487 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A MOBILE COMMUNICATION SYSTEM SUPPORTING UPLINK PACKET DATA SERVICE - A method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting an uplink packet data service are provided. To transmit packet data in an HARQ mobile communication system, a second transceiver receives an RG as rate control information from a first transceiver. The second transceiver sets the allowed maximum data rate of an HARQ process to which the RG is applied to the allowed maximum data rate of an HARQ process previous to the HARQ process, if the RG indicates hold. The second transceiver transmits packet data within the set allowed maximum data rate to the first transceiver. | 05-09-2013 |
20130163499 | METHOD AND APPARATUS FOR REFERENCE SIGNALING ALLOCATION AND CHANNEL ESTIMATION IN DISTRIBUTED ANTENNA SYSTEMS - An apparatus and method for transmitting reference signals in a communication system are provided. The method includes transmitting common reference signals of a first type from a transmitter to a plurality of receivers; transmitting receiver-specific reference signals of a second type from a plurality of distributed ports to a subset of the plurality of receivers; wherein the common reference signals of the first type and the receiver-specific reference signals of the second type are allocated to different resources from one another, and wherein the communication system includes the transmitter and the plurality of receivers and the transmitter uses a plurality of central ports and the plurality of distributed ports to transmit to the plurality of receivers. | 06-27-2013 |
20130163569 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING REFERENCE SIGNAL TRANSMISSION INFORMATION IN CELLULAR RADIO COMMUNICATION SYSTEM USING COOPERATIVE MULTI-POINT SCHEME - An apparatus and method for transmitting/receiving reference signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (CoMP) scheme is provided. In the reference signal transmission information transmission method, a Central Control Apparatus (CCA) transmits measurement set information related to a measurement set including at least one reference signal resource unit through which a reference signal is transmitted, and reference signal transmission timing information including information related to a timing at which the reference signal is transmitted to a User Equipment (UE), and transmits reference signal non-transmission timing information including information related to a timing at which the reference signal is not transmitted through the reference signal resource unit to the UE. | 06-27-2013 |
20130177008 | Method for Configuring Gain Factors for Uplink Service in Radio Telecommunication System - A method for configuring gain factors in a WCDMA telecommunication system is provided in which the gain factor for defining power required for normal reception of uplink data in an environment supporting an uplink service over an E-DCH can be configured using minimal signaling information. First gain factors for first TFs corresponding to a part of a TF set including a plurality of TFs available for an uplink service are received. One of the first TFs is determined as a reference TF for a second TF other than the first TFs in the TF set. Then, a second gain factor for the second TF is calculated using the first gain factor for the determined reference TF. The second gain factor is used for transmitting or receiving uplink data. | 07-11-2013 |
20130178220 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DOWNLINK DATA CHANNEL SIGNAL TRANSMISSION INFORMATION IN CELLULAR RADIO COMMUNICATION SYSTEM USING COOPERATIVE MULTI-POINT SCHEME - An apparatus and a method for transmitting/receiving downlink data channel signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (COMP) scheme are provided. In the downlink data channel signal transmission information transmission method, a Base Station (BS) transmits downlink data channel signal transmission information including information related to Resource Elements (REs) scheduled for a downlink data channel signal transmission to a User Equipment (UE), and transmits downlink data channel signal non-transmission information including information related to REs through which a downlink data channel signal is not transmitted among the REs scheduled for the downlink data channel signal transmission to the UE. | 07-11-2013 |
20130182594 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL - An apparatus and a method for generation of channel state information in a wireless communication system are provided. The method includes transmitting, by an evolved Node B (eNB), a first reference signal to a plurality of User Equipments (UEs), receiving channel state information generated based on the first reference signal from the plurality of UEs, selecting candidate UEs to which wireless resources are to be allocated and transmitting second reference signals to the selected candidate UEs, receiving channel state information generated based on the second reference signals from the candidate UEs, and selecting final UEs, to which wireless resources are to be allocated, from the candidate UEs based on the channel state information generated based on the second reference signals, and transmitting control information for data reception to the selected final UEs. | 07-18-2013 |
20130346827 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method in a mobile communication system is provided. The interleaving method includes encoding a plurality of bits to output encoded bits in a sequence, interleaving the encoded bits based on a modulation order to generate interleaved encoded bits comprising consecutive bits having a size based on the modulation order, the consecutive bits corresponding to consecutive bits of the encoded bits, scrambling the interleaved encoded bits with a scrambling code to generate scrambled bits, and modulating the scrambled bits based on the modulation order to output at least one symbol. | 12-26-2013 |
20140064208 | METHOD, APPARATUS, AND SYSTEM FOR TRANSMITTING AND RECEIVING INFORMATION OF AN UNCODED CHANNEL IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM - A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a common control channel and a control channel designated for a particular user. Uncoded 1-bit information is broadly dispersed in frequency and time domains using multiplexing technology for maximizing diversity gain in a channel for transmitting information of at least one bit to a particular user like an acknowledgement (ACK) channel. The transmitter converts a sequence obtained by multiplexing multiple bits to be transmitted to a plurality of users to parallel signals, and broadly disperses the parallel signals in the time and frequency domains. When the uncoded 1-bit information is transmitted, reception reliability is improved because channel coding and transmission are efficiently performed using a small amount of resources. | 03-06-2014 |
20140140298 | METHOD FOR ALLOCATING RESOURCE IN LTE SYSTEM - A fractional Resource Block (RB) allocation method which enables resource allocation in a unit smaller than RB to improve the capacity of Voice over Internet Protocol (VoIP) in a Long Term Evolution (LTE) system is provided. The method includes generating modulation symbols streams by performing channel coding and modulation on transport blocks corresponding to first and second data to be transmitted to respective users, multiplexing the modulation symbols stream alternately in unit of two continuous modulation symbols, and transmitting the multiplexed modulation symbol stream as mapped to corresponding resource. A resource arrangement method allows different users to share the same resource without using a Space Domain Multiple Access (SDMA) and indicates fractional RB allocation. | 05-22-2014 |
20140211745 | APPARATUS AND METHOD FOR RESOURCE ALLOCATION INFORMATION TRANSMISSION IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band. | 07-31-2014 |
20140219228 | METHODS FOR POWER HEADROOM REPORTING, RESOURCE ALLOCATION, AND POWER CONTROL - Methods and apparatuses are provided for reporting power headroom for a UE. At least one of power control information associated with a PUSCH transmission in a subframe and power control information associated with a PUCCH transmission in the subframe is received. One of a first power headroom information and a second power headroom information is conditionally generated. One of the first power headroom information and the second power headroom information is conditionally transmitted. If the UE transmits the PUSCH without the PUCCH in the subframe, the second power headroom information is generated by subtracting the transmit power for the PUSCH transmission and a transmit power for a PUCCH from the maximum transmit power of the UE in the subframe based on the power control information associated with the PUSCH transmission and power control information associated with the latest PUCCH transmission. | 08-07-2014 |