Patent application number | Description | Published |
20090028260 | METHOD AND APPARATUS FOR PROVIDINGCHANNEL QUALITY FEEDBACK IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - In an Orthogonal Frequency Division Multiplexing communication system, wherein frequency bandwidth may be represented by multiple Resource Block Group (RBG) levels, wherein each RBG level comprises a division of the frequency bandwidth into a number of RBGs different from the number of RBGs of the other RBG levels, a user equipment measures a channel quality associated with one or more RBGs of one or more RBG levels of the multiple RBG levels, selects an RBG of from among the measured RBGs based on the measured channel qualities, and reports channel quality information associated with the selected RBG to a radio access network, wherein reporting comprises providing an index to the selected RBG and providing channel quality information for the indexed RBG. | 01-29-2009 |
20090041140 | METHOD FOR BLINDLY DETECTING A PRECODING MATRIX INDEX - A method for blindly detecting a precoding matrix index used to transmit a data or control signal is provided. The method includes receiving at a mobile station ( | 02-12-2009 |
20090203323 | UPLINK CONTROL SIGNALING IN A COMMUNICATION SYSTEM - A system and method for uplink control signaling in a communication system includes a step of transmitting ( | 08-13-2009 |
20090225721 | HIERARCHICAL PILOT STRUCTURE IN WIRELESS COMMUNICATION SYSTEMS - A method for communicating control channel information in a wireless communication system, including transmitting a super-frame having a time-frequency resource region containing an allocation control channel and multiple pilot elements, at least some of which are associated with the allocation control channel, and indicating, in a configuration information control channel of the super-frame, a characteristic of the pilots elements associated with the allocation control channel. | 09-10-2009 |
20090238303 | METHOD AND SYSTEM FOR CODEBOOK-BASED CLOSED-LOOP MIMO USING COMMON PILOTS AND ANALOG FEEDBACK - A method and system that enables the usage of sounding-based feedback or analog feedback in a MIMO communication system with non-beamformed or broadcast pilot symbols is disclosed. The mobile station may employ a feedback channel to send a sounding waveform to a base station, a feedforward channel to receive from the base station codebook weights derived from the send sounding waveform, a receiver to receive communication from the base station, and a processor to detect beamformed data from the received communication and received codebook weights from the base station. The base station processes the sounding waveform to determine codebook weights on groups of subcarriers. Additionally, the base station transmits the beamformed payload and broadcast pilots to the mobile station. | 09-24-2009 |
20090274226 | SOUNDING CHANNEL BASED FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for providing sounding channel based feedback in an OFDM communication system includes a first step ( | 11-05-2009 |
20090323614 | FRAME ALLOCATION TO SUPPORT LEGACY WIRELESS COMMUNICATION PROTOCOLS ON UPLINK TRANSMISSION | 12-31-2009 |
20100029288 | UPLINK SPATIAL DIVISION MULTIPLE ACCESS (SDMA) USER PAIRING AND SCHEDULING - A method, system and communication network for transmitting information signals via uplink (UL) collaborative SDMA, in a wireless communication system. Base station receiver estimates a channel gain associated with the transmission path(s) of each user and keeps a matrix of normalized covariance, between users. Based on the estimated channel gain and the normalized covariance, ULS utility is able to compute channel capacity. Based on capacity estimates of (1) the multiplexed user signals and (2) the individual user signals, signals are either multiplexed for UL SDMA or are transmitted individually. An optimal selection of multiplexed signals may be based upon: (1) a cross user interface measurement; and (2) a selection mechanism based on eigen-decomposition techniques. The ULS utility enables a UL scheduler to pair information signals with clear spatial distinction and minimal correlation, based on capacity evaluations. | 02-04-2010 |
20100039997 | METHOD AND APPARATUS FOR IMPLIED RESOURCE ASSIGNMENT FOR UPLINK ACKNOWLEDGMENT SIGNALLING - A network node constructs ( | 02-18-2010 |
20100046643 | FEEDFORWARD OF NON-QUANTIZED PRECODING WEIGHTS IN A WIRELESS COMMUNICATIONS SYSTEM - An apparatus and method to feedforward non-quantized precoding weights in an OFDM communication system includes a first step ( | 02-25-2010 |
20100110994 | METHOD AND APPARATUS FOR ALLOCATING A PHYSICAL RANDOM ACCESS CHANNEL IN AN OTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - A method and eNode B are disclosed that allocate a Physical random access channel (PRACH) in an Orthogonal Frequency Division Multiplexing communication system. In one embodiment, the eNode B maintains a predetermined location of a PRACH within a sub-frame, which predetermined location is adjacent to a Physical uplink control channel (PUCCH), allocates one or more sub-frames of a radio frame to a PRACH, and receives an access attempt over the PRACH based on the predetermined sub-frame location and the allocated one or more sub-frames. In another embodiment, the eNode B allocates one or more Physical Resource Blocks (PRBs) of one or more sub-frames of a PRACH hopping pattern period to a PRACH and informs a user equipment of the PRBs allocated for the PRACH by transmitting a first parameter informing of a slot configuration and a second parameter informing of a duration of a PRACH hopping period. | 05-06-2010 |
20100111223 | METHOD AND APPARATUS FOR CHOOSING A MODULATION AND CODING RATE IN A MULTI-USER, MIMO COMMUNICATION SYSTEM - A method and apparatus for choosing a modulation and coding rate in a MU-MIMO communication system is provided herein. During operation, a node will determine the MCR to feed back to the base even though the mobile does not know which of the possible interferers (if any) will be using the same time/frequency resources as the mobile. This takes place via the mobile node calculating best antenna weights (codebook choice) for each group of subcarriers that can be potentially used by the mobile. Transmit weights v for each interferer are then determined and the weights are utilized to determine a best modulation and coding rate for the mobile. | 05-06-2010 |
20100142462 | PASSIVE COORDINATION IN A CLOSED LOOP MULTIPLE INPUT MULTIPLE OUT PUT WIRELESS COMMUNICATION SYSTEM - A system and method for passive coordination of base stations in a closed-loop multiple-input multiple-output wireless communication system, includes a first step | 06-10-2010 |
20100150266 | METHOD AND APPARATUS FOR CODEBOOK-BASED FEEDBACK IN A CLOSED LOOP WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for feedback for closed-loop transmitting with multiple transmit antenna elements and multiple receive antenna elements. A base station includes a codebook containing sets of weightings for the multiple transmit antenna elements, with each set of weightings identified by an index and the codebook known to the base station and a served mobile station (MS). The base station pre-codes pilot signals using a precoding matrix, preferably a unitary matrix, to produce pre-coded pilot signals, which precoding matrix may or may not be known to the MS and which precoding matrix may or may not be included in the codebook. The base station then transmits the pre-coded pilot signals to the MS via the multiple transmit antenna elements and, in response, receives an index to a set of weightings in the codebook for use in a subsequent transmission of a data stream. | 06-17-2010 |
20100172303 | System and Method for Downlink Signaling for High Speed Uplink Packet Access - A wireless communication system ( | 07-08-2010 |
20100195587 | METHOD FOR UPLINK ACKNOWLEDGEMENT/NON-ACKNOWLEDGEMENT MESSAGES IN A WIRELESS COMMUNICATION SYSTEM - A method for uplink ACK/NACK for LTE TDD. The method includes receiving a frame having multiple subframes wherein a plurality of subframes being downlink subframes and at least one subframe being an uplink subframe. One uplink subframe can contain an acknowledgment/non-acknowledgment (ACK/NACK) corresponding to at least one of the plurality of downlink subframes. To transmit ACK/NACKs, one uplink subframe for ACK/NACK is used in response to one of the plurality of downlink subframes. In addition, ACK/NACK responses can be bundled into one uplink subframe for at least two of the plurality of downlink subframes. In an embodiment, multiple ACK/NACK responses can be used in one uplink subframe that corresponds to at least two of the plurality of downlink subframes in a multiple feedback configuration. One uplink subframe for ACK/NACK responses and bundling multiple ACK/NACK responses is for a bundled feedback configuration. | 08-05-2010 |
20100284482 | METHOD AND APPARATUS FOR RADIO RESOURCE ALLOCATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - In an OFDM communication system, wherein a frequency bandwidth is divided into multiple Physical Resource Units (PRUs), a Frequency Partitioning Configuration Module (FPCM) is provided that configures a physical layer for use in multiple coverage areas. The FPCM divides the PRUs into a first group, for frequency selective allocations, and a second group, for frequency diverse allocations. The FPCM subdivides each of the two groups into multiple sets of PRUs, maps the sets of PRUs from the first group to consecutive PRUs allocated for contiguous segment allocation (CS-PRUs), and maps the sets of PRUs from the second group to consecutive PRUs allocated for distributed segment allocation (DS-PRUs). The FPCM permutes the DS-PRUs and allocates the CS-PRUs and the permuted DS-PRUs to at least one frequency partition. | 11-11-2010 |
20110237288 | UPLINK POWER CONTROL FOR CHANNEL AGGREGATION IN A COMMUNICATION NETWORK - A system and method for uplink power control for aggregated channels in a communication network includes a step | 09-29-2011 |
20110243262 | METHOD AND APPARATUS FOR CHANNEL SOUNDING IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - An Orthogonal Frequency Division Multiplexing communication system is provided that triggers a transmission of an uplink sounding signal by use of a Downlink Control Information (DCI) message. In various embodiments of the invention, the DCI message may be used to individually trigger an uplink sounding signal by a single user equipment or may be used to trigger an uplink sounding signal by a group of users equipment. | 10-06-2011 |
20120270536 | UPLINK INTERFERENCE MANAGEMENT FOR A HETEROGENEOUS WIRELESS NETWORK - User equipment (UE), referred to herein as an interfering UE ( | 10-25-2012 |
20130121432 | METHOD AND APPARATUS FOR CODEBOOK BASED FEEDBACK IN A CLOSED LOOP WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for feedback for closed-loop transmitting with multiple transmit antenna elements and multiple receive antenna elements. A base station includes a codebook containing sets of weightings for the multiple transmit antenna elements, with each set of weightings identified by an index and the codebook known to the base station and a served mobile station (MS). The base station pre-codes pilot signals using a precoding matrix, preferably a unitary matrix, to produce pre-coded pilot signals, which precoding matrix may or may not be known to the MS and which precoding matrix may or may not be included in the codebook. The base station then transmits the pre-coded pilot signals to the MS via the multiple transmit antenna elements and, in response, receives an index to a set of weightings in the codebook for use in a subsequent transmission of a data stream. | 05-16-2013 |
20130242748 | HIERARCHICAL NETWORK AND INTERFERENCE MANAGEMENT - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for network management through a hierarchical architecture with a control functionality of a network server (e.g., C-SON) in relationship to clusters comprising eNBs (access points), and for implementing coordinated multi-point (CoMP) transmission and reception in conjunction with inter-cell interference coordination (ICIC) in wireless networks such as LTE wireless networks. In particular, embodiments of the invention describe control and coordination mechanisms among the network elements for different network architectures and use-case scenarios. Such mechanisms may be managed by a centralized self-organizing network controller such as C-SON and hierarchically via localized controllers (such as cluster coordinators) residing in macro eNBs depending on system architectural constraints and network state. A fault-tolerant mechanism then may be defined to recover from failure of controlling sub-elements so that the network remains stable at all times. | 09-19-2013 |
20130308595 | REUSE OF LEGACY RADIO ACCESS TECHNOLOGY - The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for using (or reusing) unused frequency resources/channels in a legacy radio access technology system (a first radio access technology system) such as GSM as additional/reused resources for a future/advanced radio access technology systems (a second radio access technology system) such as LTE wireless system. In one embodiment, the extension carrier may be used to simultaneously deploy/assign, e.g., LTE transmission in the same frequency band as the legacy radio access technology system such as GSM with LTE transmission occupying empty GSM time plus frequency slots. In a further embodiment, LTE system over-provisioning may be used so that individual GSM channel(s) can be deactivated and used by the LTE system. | 11-21-2013 |
20140148177 | Method for Network-Coordinated Device-to-Device Communication - Various communication systems may benefit from network coordination. For example, a system of the long term evolution (LTE) of the third generation partnership project (3GPP) that utilizes device-to-device communication may benefit from various methods, devices, and systems for network-coordinated device-to-device communication. For example, a method may include determining a penalty for using a subframe for device-to-device communication based on radio conditions. The method may also include applying the penalty in selecting radio resources for a user equipment for device-to-device communication. | 05-29-2014 |
20140293938 | METHOD FOR UPLINK ACKNOWLEDGEMENT/NON-ACKNOWLEDGEMENT MESSAGES IN A WIRELESS COMMUNICATION SYSTEM - A method for uplink ACK/NACK for LTE TDD. The method includes receiving a frame having multiple subframes wherein a plurality of subframes being downlink subframes and at least one subframe being an uplink subframe. One uplink subframe can contain an acknowledgment/non-acknowledgment (ACK/NACK) corresponding to at least one of the plurality of downlink subframes. To transmit ACK/NACKs, one uplink subframe for ACK/NACK is used in response to one of the plurality of downlink subframes. In addition, ACK/NACK responses can be bundled into one uplink subframe for at least two of the plurality of downlink subframes. In an embodiment, multiple ACK/NACK responses can be used in one uplink subframe that corresponds to at least two of the plurality of downlink subframes in a multiple feedback configuration. One uplink subframe for ACK/NACK responses and bundling multiple ACK/NACK responses is for a bundled feedback configuration. | 10-02-2014 |
20140301278 | METHOD AND APPARATUS FOR RECEIVING UPLINK SIGNALS - A method comprises determining in a first network element how much of a received uplink transmission is to be transmitted to a second network element, said first and second network elements both receiving said uplink transmission; and causing at least part of said received uplink transmission to be transmitted to said second network element. | 10-09-2014 |