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| 20080219235 | System and Method for Frequency Division Multiple Access Communications - A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions, having an improved pilot insertion scheme for single carrier based communications is provided. A first time duration for transmission of a data payload block ( | 09-11-2008 |
| 20080247479 | Pilot Scheme For A Mimo Communication System - The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols. | 10-09-2008 |
| 20090074098 | System and method for embedding OFDM in CDMA systems - Systems and methods of combining OFDM and CDMA signals are provided. An OFDM packet data channel is overlaid over CDMA transmissions. The channel is scheduled slotwise between multiple users. In some embodiments, there is a CDMA packet data channel which is scheduled together with the OFDM packet data channel. | 03-19-2009 |
| 20090086648 | Rank Adaptation for an Open Loop Multi-Antenna Mode of Wireless Communication - To perform rank adaptation for a mobile station in a wireless network, it is determined whether the mobile station is fast moving. In response to determining that the mobile station is fast moving, an open loop multi-antenna mode is selected to perform wireless communication between the mobile station and a base station. Also, selection is made from among plural ranks for the wireless communication according to the open loop multi-antenna mode between the mobile station and the base station. | 04-02-2009 |
| 20090129502 | WIRELESS FEEDBACK SYSTEM AND METHOD - A codebook C is provided in a MIMO transmitter as well as a MIMO receiver. The codebook C will include M codewords c | 05-21-2009 |
| 20090213948 | ADAPTIVE TWO-DIMENSIONAL CHANNEL INTERPOLATION - A method and apparatus for improving channel estimation within an OFDM communication system. Channel estimation in OFDM is usually performed with the aid of pilot symbols. The pilot symbols are typically spaced in time and frequency. The set of frequencies and times at which pilot symbols are inserted is referred to as a pilot pattern. In some cases, the pilot pattern is a diagonal-shaped lattice, either regular or irregular. The method first interpolates in the direction of larger coherence (time or frequency). Using these measurements, the density of pilot symbols in the direction of faster change will be increased thereby improving channel estimation without increasing overhead. As such, the results of the first interpolating step can then be used to assist the interpolation in the dimension of smaller coherence (time or frequency). | 08-27-2009 |
| 20090274112 | Initial Access Channel for Scalable Wireless Mobile Communication Networks - Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure. | 11-05-2009 |
| 20110075651 | SYSTEMS AND METHODS FOR SC-FDMA TRANSMISSION DIVERSITY - The present application provides methods, devices and transmitters that mitigate increases in peak to average power ratio (PAPR) from transmission diversity in a single carrier frequency division multiple access (SC-FDMA) modulated uplink A PAPR preserving precode matrix hopping method that utilizes cyclic shift delays is provided, as well as a sub-band based transmit diversity scheme. The present application also provides methods, devices and transmitters that relax the scheduling restrictions associated with uplink scheduling in the LTE standard. | 03-31-2011 |
| 20110228728 | METHOD AND SYSTEM FOR SPACE CODE TRANSMIT DIVERSITY OF PUCCH - Aspects of the invention are directed to a transmit diversity method for use in a wireless terminal having a plurality of antennas and a wireless terminal configured to implement the method. The transmit diversity method includes using a different orthogonal sequence for each antenna, or group of antennas, for transmitting an uplink control channel from a wireless terminal to a base station. A first step of the method involves assigning at least one orthogonal sequence to one or more of the plurality of antennas, each of the plurality of antennas being assigned at least one orthogonal sequence. Once the orthogonal sequence is assigned, a further step involves scrambling a signal to be transmitted on the physical uplink control channel (PUCCH) using the at least one orthogonal sequence for each antenna thereby producing a scrambled PUCCH for transmission by each antenna. The scrambled PUCCH can then be transmitted on the plurality of antennas. | 09-22-2011 |
| 20110286349 | Method and System for User Equipment Location Determination on a Wireless Transmission System - Neighbor cell hearability can be improved by including an additional reference signal that can be detected at a low sensitivity and a low signal-to-noise ratio, by introducing non-unity frequency reuse for the signals used for a time difference of arrival (TDOA) measurement, e.g., orthogonality of signals transmitted from the serving cell sites and the various neighbor cell sites. The new reference signal, called the TDOA-RS, is proposed to improve the hearability of neighbor cells in a cellular network that deploys 3GPP EU-TRAN (LTE) system, and the TDOA-RS can be transmitted in any resource blocks (RB) for POSCH and/or MBSFN subframe, regardless of whether the latter is on a carrier supporting both PMCH and POSCH or not. Besides the additional TDOA-RS reference signal, an additional synchronization signal (TDOA-sync) may also be included to improve the hearability of neighbor cells. | 11-24-2011 |
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| 20100271988 | Hybrid-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 |
| 20110064115 | TRANSMISSION OF INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna. | 03-17-2011 |
| 20110170495 | METHOD AND APPARATUS FOR LOGICAL CHANNEL PRIORITIZATION FOR UPLINK CARRIER AGGREGATION - A method and apparatus for logical channel prioritization at a user equipment in a multiple uplink carrier system, the method receiving a set of logical channel priorities at the user equipment, the logical channel priorities being assigned on a per carrier basis; and applying the set of logical channel priorities to each logical channel for carrier selection. Further a method and apparatus for constructing an uplink medium access control protocol data unit at a user equipment in a multiple uplink carrier system, the method sorting possible logical channel and carrier pairings based on logical channel priorities; utilizing a prioritized bit rate process to allocate logical channel traffic in an order determined by the sorting; and performing a remaining resources process to allocate logical channel traffic based on a priority order. | 07-14-2011 |
| 20110170496 | Control Channel Interference Management and Extended PDCCH for Heterogeneous Network - A method for managing control channel interference is provided. The method includes a first access node performing at least one of blanking and transmitting at lower than nominal transmit power on at least a portion of a control channel. The method further includes the first access node applying at least one of blanking and transmitting at lower than nominal transmit power only on the control region of chosen subframes, wherein a second access node transmits the control region of the chosen subframes at nominal transmit power. | 07-14-2011 |
| 20110170575 | Transmit Diversity Using Low Code Rate Spatial Multiplexing - A system is provided for transmitting a low code rate spatially multiplexed channel on multiple antennas. The system includes a transmitter and a processor. The processor is configured such that the processor encodes a block of information bits to form channel coded bits, wherein the ratio of the number of channel coded bits to the number of information bits is greater than one; and the processor maps the channel coded bits to modulation symbols, and each channel coded bit is mapped once to a modulation symbol. The transmitter is configured to transmit a first portion of the modulation symbols using a spreading sequence on a first antenna of the multiple antennas and to transmit a second portion of the modulation symbols using the spreading sequence on a second antenna of the multiple antennas. | 07-14-2011 |
| 20110199986 | REFERENCE SIGNAL FOR A COORDINATED MULTI-POINT NETWORK IMPLEMENTATION - A method of decoding a channel state information reference signal (CSI-RS) is presented. An indication of a resource element (RE) configuration allocated for transmission of CSI-RSs by a first cell is received from a second cell. The method includes at least one of using the indication of the RE configuration to decode a first CSI-RS received from the first cell, and using the indication of the RE configuration to mute one or more REs within a data channel transmission received from a third cell. The first cell, second cell and third cell may be associated within a CSI-RS group. In some cases, at least two of the first cell, the second cell, and the third cell are mutually interfering cells. The indication of the RE configuration may include a plurality of logical indices having incremental values, the plurality of logical indices identifying REs used to transmit CSI-RS. | 08-18-2011 |
| 20110200018 | SYSTEM AND METHOD FOR IMPROVED CONTROL CHANNEL TRANSMIT DIVERSITY - A method for providing transmit diversity in wireless network communications is presented. An indication of a slot structure is received. The slot structure identifies at least a first location of a reference signal within a slot. A first reference signal is transmitted within a first slot using a first antenna. A location of the first reference signal within the first slot is determined by the slot structure. A second reference signal is transmitted within the first slot using a second antenna. A location of the second reference signal within the first slot is determined by the slot structure. In some cases, the slot structure identifies a second location of a reference signal within the slot structure. The second location being offset from the first location, and a third reference signal is transmitted within the first slot at the second location on the first antenna. | 08-18-2011 |
| 20110200081 | System And Method For Channel Status Information Feedback In A Wireless Communications System That Utilizes Multiple-Input Multiple-Output (MIMO) Transmission - A method for user equipment operation in a wireless communication system, the wireless communication system having an base station, the method comprising measuring a channel between the UE and the base station, determining a quantized estimate using a codebook to approximate the measured channel, computing an error measure for the quantized estimate and transmitting the error measure and the quantized estimate to the base station for use by the base station in reconstructing an actual channel vector. | 08-18-2011 |
| 20110200131 | Low Overhead PMI and CQI Feedback and Pairing Schemes for MU-MIMO - A method is provided for searching for a pairing PMI including estimating a MIMO wireless propagation channel from an access point transmitter to a receiver at a UE; quantizing the estimated channel with a codebook consisting of a plurality of codewords, the result being an actual SU-MIMO PMI currently applicable to the UE; estimating the channel quality corresponding to the actual SU-MIMO PMI, resulting in at least one CQI for the UE; constructing a plurality of subsets from a codebook of codewords, wherein each subset comprises potential MU-MIMO PMIs that represent channels that have reduced interference with a channel represented by one of the potential SU-MIMO PMIs; associating each potential SU-MIMO PMI with the subset that comprises the potential MU-MIMO PMIs that represent channels that have reduced interference with the channel represented by that potential SU-MIMO PMI; searching for an appropriate pairing PMI and the associated CQI for the UE. | 08-18-2011 |
| 20110255483 | Signaling of Precoding Granularity for LTE and LTE-A - A method for indicating a precoding granularity value. The method includes an access node performing at least one of dynamically signaling the precoding granularity value in downlink control information, semi-statically signaling the precoding granularity value through high-layer signaling, and implicitly signaling the precoding granularity value through a link with at least one parameter that the access node transmits for another purpose. | 10-20-2011 |
| 20110269490 | SYSTEM AND METHOD FOR CHANNEL STATE FEEDBACK IN CARRIER AGGREGATION - A method for communicating channel state information (CSI) to a base station is presented. The method includes identifying a number of allocated resources for CSI within at least one of a Physical Uplink Control CHannel (PUCCH) payload and a Physical Uplink Shared CHannel (PUSCH) payload. The method includes encoding channel state information (CSI) for activated carriers on a user equipment into the allocated resources for CSI. When a number of activated carriers on the user equipment is less than the number of allocated resources for CSI, the method includes using repetition encoding to duplicate the CSI for at least one of the activated carriers on the user equipment into the allocated resources for CSI. | 11-03-2011 |
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| 20080253469 | Methods and Systems for Ofdm Using Code Division Multiplexing - In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions. | 10-16-2008 |
| 20090060081 | Systems and methods for ofdm channelization - Systems and methods for OFDM channelization are provided that allow for the co-existence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided, and systematic channel definition and labeling schemes are provided. | 03-05-2009 |
| 20100322179 | Reference Signal Design For Wireless Communication System - A method and system for identifying a reference signal pattern in contiguous resource blocks received by a user agent (UA) in a wireless communication system where any of one through N contiguous resource blocks may be assigned to a UA, the method performed by a UA and comprising the steps of storing resource block reference signal patterns in a UA memory where the patterns include a separate reference signal pattern for each possible number of contiguous resource blocks that may be assigned to a UA, receiving a resource grant indicating a number contiguous resource block is assigned to the UA, based on the number of contiguous resource blocks assigned to the UA, identifying one of the reference signal patterns in the memory and using the identified one of the reference signal patterns to identify reference signals in contiguously received resource blocks. | 12-23-2010 |
| 20100323612 | Transparent Relay Using Dual-Layer Beam Forming Association Procedures - A system and method for use in a communication system that includes at least one base station and at least one relay node (RN) for communicating with a user agent (UA), the system comprising a base station that includes a processor and an antenna assembly capable of simultaneously transmitting at least first and second layer base station beams to the UA and a relay node (RN) that includes a processor and an antenna assembly capable of simultaneously transmitting at least first and second layer RN beams to the UA, wherein the first base station beam and first RN beam superpose on each other during transmission and the second base station beam and second RN beam superpose on each other during transmission so that the RN is transparent to the UA. | 12-23-2010 |
| 20110034175 | SYSTEM AND METHOD FOR A VIRTUAL CARRIER FOR MULTI-CARRIER AND COORDINATED MULTI-POINT NETWORK OPERATION - A method for implementing coordinated multi-point transmission and reception in a multi-carrier network system including a first serving network node and a second cooperating network node is disclosed. The method includes the steps of configuring a first transmission channel. The first transmission channel is established on the first serving network node. The method includes configuring a second transmission channel. The second transmission channel is established on the second cooperating node. The method includes transmitting control information using the first transmission channel. The control information allocates a resource on the second transmission channel and the second transmission channel is not established on the first serving network node. | 02-10-2011 |
| 20110044239 | SYSTEM AND METHOD FOR CARRIER ACTIVATION - A method for receiving data using a user agent (UA) configured to communicate with a wireless communications network using a first and second communication carrier is presented. The method includes receiving control information at a first time interval using the first communication carrier. The control information allocates a resource on at least one of the first communication carrier and the second communication carrier. The control information indicates whether a carrier switch is required. In one implementation, when the control information indicates a carrier switch is required, the method includes ceasing signal reception on the first communication carrier, and receiving a signal on the second communication carrier. | 02-24-2011 |
| 20110044261 | SYSTEM AND METHOD FOR CHANNEL TIMING OFFSET - A method for receiving data using a user agent (UA) configured to communicate with a wireless communications network using a first and second communication carrier is presented. The method includes receiving control information during a first time interval. The control information allocates a resource on at least one of the first communication carrier and the second communication carrier. When the control information allocates a resource on the first communication carrier, the method includes receiving data using the first communication carrier during a second time interval. When the control information allocates a resource on the second communication carrier, the method includes receiving data using the second communication carrier during a third time interval, the third time interval being offset from the first time interval. | 02-24-2011 |
| 20110149886 | METHODS AND APPARATUS TO PERFORM ANTENNA MANAGEMENT - Methods and apparatus to perform antenna management are described herein. One example method of establishing communication between user equipment and a network includes receiving a control channel message, decoding the control channel message, and sending an indication of whether interoperability of receiving signals from a first number of antennas is certified for the user equipment. Other examples are shown and described. | 06-23-2011 |
| 20110158156 | METHOD AND SYSTEM USING RELAYS WITH AGGREGATED SPECTRUM - International Mobile Telecommunications (IMT) Advanced technology, also known as 4th Generation (4G) targets to support up to 100 MHz BW. LTE currently supports single carrier bandwidths of up to 20 MHz. The present application describes a multi-carrier approach in which some embodiments of the invention provide a simple solution of aggregating multiple single carrier bandwidths to obtain a wider bandwidth (>20 MHz). Such an approach may extend Long Term Evolution (LTE) bandwidth to greater than that provided by a single carrier, yet maintain full backward compatibility with technologies that predate 4G technology and utilize smaller, single carrier bandwidths. More generally, embodiments of the invention can apply to other communication standards than only LTE. | 06-30-2011 |
| 20110164491 | METHOD AND SYSTEM FOR COMBINING OFDM AND TRANSFORMED OFDM - Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM. | 07-07-2011 |
| 20110164492 | METHOD AND SYSTEM FOR COMBINING OFDM AND TRANSFORMED OFDM - Methods and systems are provided that enable an OFDM transmitter to be used for transmitting conventional OFDM or a form of transformed OFDM. A technique is provided for transforming a coded and modulated sequence of samples prior to an IFFT that enables the transformed sequence of samples to be transmitted using conventional OFDM or transformed OFDM. The selection of a transform function for transforming the coded and modulated sequence of samples may be based on optimizing the transform function for particular operating conditions between the transmitter and receiver. In some embodiments of the invention OFDM and time transformed OFDM are multiplexed in time and/or frequency in a transmission frame. In some embodiments of the invention a pilot pattern is provided in which the pilot are sent using OFDM and data is sent using OFDM and/or transformed OFDM. | 07-07-2011 |
| 20110176629 | DOWNLINK TRANSMISSION IN A MULTIPLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT ("MU-MIMO") WIRELESS COMMUNICATION SYSTEM - Information transmission in a multiple-input multiple-output (“MIMO”) wireless communication system is provided. In one embodiment, a method for transmitting information in a MIMO wireless communication system, comprising updating channel quality information (“CQI”) values of a plurality of wireless devices, wherein updating said CQI values consider the effects of interference from transmissions to those wireless devices associated with a pre-assigned companion codeword set; pairing said plurality of wireless devices using at least said CQI values, a precoding matrix index (“PMI”) value and said pre-assigned companion codeword set, wherein said pre-assigned companion codeword set, pre-assigned companion codewords associated with said pre-assigned companion codeword set and said PMI value are updated for each of said plurality of wireless devices; precoding the information for each of said plurality of wireless devices using said PMI value; and transmitting said precoded information to each of said plurality of wireless devices. | 07-21-2011 |
| 20110194540 | MULTI-SITE MIMO COOPERATION IN CELLULAR NETWORKS - A method of serving a given data stream to a target mobile terminal, in a cellular communications network that includes a plurality of transmitting sites wherein each transmitting site including at least one antenna, is provided. The method includes designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. Other techniques for multi-site MIMO cooperation are also provided. | 08-11-2011 |
| 20110205955 | NETWORK-RELAY SIGNALING FOR DOWNLINK TRANSPARENT RELAY - In a method of providing downlink retransmissions to a mobile station in a wireless communication network, the wireless communication network comprising a base station communicatively linked to a transparent relay station, the base station receives a request for a retransmission from the mobile station; schedules resources for the retransmission; signals scheduling information for the retransmission to the transparent relay station via a control link; and the transparent relay station receives the scheduling information for the retransmission on the control link; and sends the retransmission to the mobile station in a retransmit subframe on a retransmit frequency band. | 08-25-2011 |
| 20110206157 | REFERENCE SIGNAL DESIGN FOR DOWNLINK HIGH-ORDER MIMO - In a cellular network supporting both legacy standard-compliant mobile terminals and next generation standard-compliant mobile terminals, both legacy reference signals and next generation reference signals are supported. A method of operation of a MIMO transmitter compliant with both standards includes: defining a matrix of resource blocks within an information channel of the cellular network, wherein each resource block corresponds to a region of subcarriers of a transmission timeslot at a given frequency subband; assigning a first set of reference signals (RSs) for the legacy standard-compliant mobile terminals to resource blocks at specific locations within the matrix to be transmitted by the MIMO transmitter, the specific locations being defined by the legacy standard; and assigning a second set of RSs for the next-generation standard-compliant mobile terminals to other resource blocks within the matrix to be transmitted by the MIMO transmitter. | 08-25-2011 |
| 20110268045 | SYSTEM AND METHOD FOR UPLINK CONTROL INFORMATION TRANSMISSION IN CARRIER AGGREGATION - A method for communicating uplink control information to a base station using a user equipment is presented. The method includes identifying component carriers on the user equipment scheduled for Physical Uplink Shared CHannel (PUSCH) transmissions, and identifying at least one first ranking for each of the component carriers for transmission of uplink control information. Each first ranking is at least partially determined by whether the component carrier is configured for delay-sensitive transmissions. The method includes using the at least one first ranking to select a first component carrier for transmission of uplink control information, and encoding uplink control information into the first component carrier for transmission to the base station. | 11-03-2011 |
| 20110306291 | ENABLING DOWNLINK TRANSPARENT RELAY IN A WIRELESS COMMUNICATIONS NETWORK - Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station. | 12-15-2011 |
| 20110310986 | System and Method for Uplink Control Information Transmission in Carrier Aggregation - A method for communicating uplink control information to a base station using a user equipment is presented. The method includes identifying component carriers on the user equipment scheduled for Physical Uplink Shared CHannel (PUSCH) transmissions, and identifying at least one first ranking for each of the component carriers for transmission of uplink control information. Each first ranking is at least partially determined by whether the component carrier is configured for delay-sensitive transmissions. The method includes using the at least one first ranking to select a first component carrier for transmission of uplink control information, and encoding uplink control information into the first component carrier for transmission to the base station. | 12-22-2011 |
| 20120087335 | Multi-site mimo cooperation in cellular network - In a cellular communications network comprising a plurality of transmitting sites wherein each transmitting site comprises at least one antenna, a method of serving a given data stream to a target mobile terminal, comprising: designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. | 04-12-2012 |
| 20120087394 | METHODS AND SYSTEMS FOR OFDM USING CODE DIVISION MULTIPLEXING - In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions. | 04-12-2012 |
| 20120087442 | DESIGN ASPECTS TO SUPPORT LTE-A DOWNLINK HI-ORDER MIMO - A method of operation of a MIMO transmitter, in a cellular network supporting both legacy standard-compliant mobile terminals and next generation standard-compliant mobile terminals, the method comprising defining a matrix of resource blocks within an information channel of the cellular network, wherein each resource block corresponds to a region of subcarriers of a transmission timeslot at a given frequency subband; assigning a first set of reference signals (RSs) for the legacy standard-compliant mobile terminals to resource blocks at specific locations within the matrix to be transmitted by the MIMO transmitter, the specific locations being defined by, the legacy standard; and assigning a second set of RSs for the next-generation standard-compliant mobile terminals to other resource blocks within the matrix to be transmitted by the MIMO transmitter. | 04-12-2012 |
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| 20090067377 | MEDIUM ACCESS CONTROL FRAME STRUCTURE IN WIRELESS COMMUNICATION SYSTEM - A wireless communication infrastructure entity configured to allocate radio resources, in a radio frame, to a wireless terminal compliant with a first protocol and to a wireless terminal compliant with a second protocol. The radio frame including a first protocol resource region and a second protocol resource region. The radio frame including a first protocol allocation control message that allocates resources within the first protocol resource region to the wireless terminal compliant with the first protocol, and a second protocol allocation control message that allocates resources within the second protocol resource region to the wireless terminal compliant with the second protocol. | 03-12-2009 |
| 20090165062 | System and Method for Reducing Latency Using a Sample Channel - A system and method reduce latency involved in delivery of content to a handheld device. A sample channel comprises a plurality of content segments. Each content segment comprises recent content from one channel of a plurality of channels available for request by a subscriber. The sample channel is received by a handheld device and is not requested by the subscriber. The plurality of content segments are stored in a memory associated with the device. Upon detecting a request from the subscriber to view a specified channel, the content segment corresponding to the specified channel is located in memory and displayed on the device. A request is made for subsequent content from the specified channel, the subsequent content starting at or before the end of the content segment. Playback of the subsequent content is then initiated such that the subsequent content starts at a time when the content segment ends. | 06-25-2009 |
| 20090168803 | METHOD AND APPARATUS FOR DYNAMICALLY CHANGING THE SIGNALING FORMAT OF MESSAGING CONTROL INFORMATION - For a packet, a communication device determines ( | 07-02-2009 |
| 20090323575 | METHOD AND APPARATUS FOR MULTICASTING WITHIN A WIRELESS COMMUNICATION NETWORK - A number of uplink transmissions from multiple remote devices is received. The remote devices correspond to a single network node, and each of the uplink transmissions corresponds to a request for content. A subset of remote devices whose uplink transmissions correspond to requests for common content is identified and a Quality of Service (QoS) level corresponding to the number of remote devices in the identified subset is determined. The common content is transmitted to the single network node at the determined QoS level. | 12-31-2009 |
| 20110007638 | ARTIFICIAL DELAY INFLATION AND JITTER REDUCTION TO IMPROVE TCP THROUGHPUTS - A method, a system and a base-station for automatically determining delays of data transmitted via Transmission Control Protocol (TCP) and inflating these delays in order to reduce jitter and improve TCP throughput in a communications network. A Dynamic Jitter Reduction (DJR) logic/utility operating within a communications node measures delays on a rolling basis in order to capture the delay profile. Based on the delay profile, the DJR utility determines a delay target. The DJR utility ‘inflates’/augments future/expected delays toward the delay target by performing on one or more of the following: (a) using a delay based factor in the scheduler metric for TCP applications; (b) performing fine-tuning of link adaptation schemes; (c) delaying transmission of packets at the transmit or receive buffer; and (d) delaying transmission of a received TCP ACK signal from the media access control (MAC) sub-layer to TCP layer. | 01-13-2011 |
| 20110007790 | METHOD AND APPARATUS FOR OPTIMIZING TARGET ERROR RATES FOR LINK ADAPTATION IN A COMMUNICATION SYSTEM - A method and apparatus for optimizing target error rates for link adaptation in a communication system. The method includes estimating a data rate associated with transmission of a data stream over a communication link. A required target error rate is then selected from a plurality of pre-defined target error rate values based on whether the estimated data rate is within a range of at least one of a plurality of pre-defined threshold values, where each of the pre-defined target error rate values maps to one of the plurality of pre-defined threshold values. A link adaptation parameter associated with the communication link is then selected or updated to maintain the required target error rate and the data stream is transmitted over the communication link using the selected/updated link adaptation parameter. | 01-13-2011 |
| 20110199991 | INCREASING SCHEDULING REQUEST EFFCIENCY IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for increasing Scheduling Request efficiency in a wireless communication system includes a step | 08-18-2011 |
