Patent application number | Description | Published |
20100203866 | METHODS AND APPARATUS TO IDENTIFY THE ACCESSIBILITY OF BASE STATIONS IN COMMUNICATION SYSTEMS - A system and method for identifying the accessibility of a base station in a communication system. The system includes at least one Closed Subscriber Group (CSG)-Open (hybrid) base station. The base station can apply a base station identifier, such as a CSG identifier, as a cyclic redundancy check (CRC) mask to a first broadcast channel communication and can include the base station identifier in the payload of, or as a CRC mask applied to, a second broadcast channel communication. A mobile station can determine from the base station identifier in the first broadcast communication if the mobile station is a member authorized closed access to the base station. The mobile station can determine from the base station identifier in second first broadcast communication if the mobile station is a non-member authorized open access to the base station. | 08-12-2010 |
20100304751 | SYSTEM AND METHOD FOR UPLINK COORDINATED MULTIPOINT RECEPTION OPERATION - A wireless network includes a serving base station and a plurality of non-serving base stations which are capable of performing a coordinated multipoint communication with at least one subscriber station. A non-serving base station includes at least one antenna configured to overhear a data burst from the subscriber station to a serving base station. The non-serving base station can decode the data burst locally. If the data burst is successfully decoded, the controller forwards the decoded data burst to the serving base station. The serving base station can decode the data burst locally or jointly decode the data burst from the non-serving base station. | 12-02-2010 |
20100323610 | METHODS AND APPARATUS TO SUPPORT PAGING WITH LESS INTERFERENCE IN MULTI-TIER COMMUNICATION SYSTEMS - A first base station and mobile station are capable of mitigating interference resulting from communications from a second base station. The base station can determine if at least a portion of a paging slot overlaps with an available interval (AI) of the second base station in which the second base station transmits. The first base station adjusts an occurrence of the paging slot such that the paging slot overlaps and/or occurs within an unavailable interval (UAI) of the second base station wherein the base station does not transmit or transmits with limited resources. | 12-23-2010 |
20110013717 | METHODS TO INDEX THE PREAMBLES IN THE BANDWIDTH REQUEST CHANNEL - For use in a wireless communication network, a mobile station configured to determine a preamble sequence from a set of indexed preamble sequences by generating an index of the preamble sequence from a B-bit message is provided. The mobile station is configured to group the B bits of the message into n groups, each group having a substantially equal number of bits. The mobile station is also configured to generate a parity bit from each of the n groups. The mobile station is further configured to determine the index of the preamble sequence based on the n parity bits. The mobile station is still further configured to transmit the preamble sequence corresponding to the index of the preamble sequence. A base station configured to recover the B-bit message using the received signal from the mobile station is also provided. | 01-20-2011 |
20110026459 | METHOD AND APPARATUS FOR CLOSED-LOOP TRANSFORMED CODEBOOK BASED ANTENNA BEAMFORMING - A wireless communications network including a plurality of base stations is provided. Each one of the base stations wirelessly communicates with a plurality of subscriber stations. At least one of the plurality of base stations includes a receiver configured to receive a precoding vector index (PVI) from a subscriber station. The least one of the plurality of base stations also includes a controller configured to update a transmit covariance matrix using the precoding vector index, and transform a codebook using the updated transmit covariance matrix. The least one of the plurality of base stations further includes a transmitter configured to perform transmit beamforming to the subscriber station using the transformed codebook. | 02-03-2011 |
20110047433 | SYSTEM AND METHOD FOR STRUCTURED LDPC CODE FAMILY WITH FIXED CODE LENGTH AND NO PUNCTURING - A family of low density parity check (LDPC) codes is generated based on a mother code having a highest code rate. The low density parity check (LDPC) codes include a codeword size of at least 1344. The LDPC codes also include a plurality of parity bits in a lower triangular form. The mother code is constructed by: selecting m number of rows and n number of columns; setting maximum column weights and row weights; designing a protograph matrix based on the set column weights and row weights and selected m and n; and selecting circulant blocks based on the protograph matrix. | 02-24-2011 |
20110103289 | SYSTEM AND METHOD FOR EFFICIENT ENHANCED MULTICAST BROADCAST SYSTEM (E-MBS) CONFIGURATION MESSAGE DECODING - A base station comprises a transmitter configured to transmit a downlink frame. The downlink frame comprising a first configuration message associated with the configuration of Enhanced-Multicast Broadcast Service (E-MBS). The first configuration message comprises a field with an indicator to indicate a next configuration message to be decoded by a subscriber station. The subscriber station, upon decoding the first configuration message, refrains from decoding subsequent configuration messages that precede the next configuration message to be decoded by the subscriber station in accordance with the indicator. | 05-05-2011 |
20110116480 | METHODS AND APPARATUS TO SUPPORT INTERFERENCE MANAGEMENT IN MULTI-TIER WIRELESS COMMUNICATION SYSTEMS - When a subscriber station (SS) encounters interference caused an interfering base station (BS), the interference can be mitigated regardless of whether the interfering base station is a CSG-Closed BS or whether the SS is connected to a serving BS. If the SS is not connected to a serving BS and cannot access the interfering BS, the SS will signal the interfering BS directly to request the interfering BS to perform IM. If the SS is a legal user, and conditions to initiate IM are met, the interfering BS will perform IM until conditions to terminate IM are met. If the SS is connected to a serving BS, the serving BS will request the interfering BS to perform or terminate interference mitigation (IM) on behalf of the SS if certain conditions are satisfied. | 05-19-2011 |
20110170480 | SYSTEM AND METHOD FOR EFFICIENT STATION IDENTIFICATION - A base station is provided. The base station includes a transmit path circuitry that generates a masking sequence to mask a cyclic redundancy check of a control channel information element. The masking sequence includes a 4-bit prefix. The three least significant bits of the 4-bit prefix indicate a message type of the control channel information element. A subscriber station is also provided. The subscriber station includes a receive path circuitry that determines a message type of a control channel information element using a three least significant bits of a 4-bit prefix of a masking sequence used to mask a cyclic redundancy check of the control channel information element. | 07-14-2011 |
20110182174 | TECHNIQUES FOR MILLIMETER WAVE MOBILE COMMUNICATION - A Base Station (BS), a Mobile Station (MS), and a millimeter Wave (mmWave) Access Point (mmAP), for use in a mobile communication system that includes a plurality of Base Stations BSs capable of communicating with a plurality of Mobile Stations (MSs), are provided. The BS includes a cellular band transceiver for communicating in a cellular band, an mmWave band transceiver for communicating in the mmWave band, and a controller for controlling both the cellular band transceiver and the mmWave band transceiver for communication with an MS. | 07-28-2011 |
20110243040 | APPARATUS AND METHOD FOR SPATIAL DIVISION DUPLEX (SDD) FOR MILLIMETER WAVE COMMUNICATION SYSTEM - An apparatus and method for full-duplex millimeter wave mobile wireless communication are provided. The apparatus includes a Spatial Division Duple (SDD) mobile communication system using millimeter waves, the SDD mobile communication system including a first wireless terminal having a first transmit antenna array having a plurality of first transmit antennas for transmitting a spatially beamformed first transmit beam, and a first receive antenna array having a plurality of first receive antennas for forming a spatially beamformed first receive beam and a second wireless terminal including a second transmit antenna array having a plurality of second transmit antennas for transmitting a spatially beamformed second transmit beam directed towards a receive beam of the first wireless terminal, and a second receive antenna array having a plurality of second receive antennas for forming a spatially beamformed second receive beam directed toward the transmit beam of the first terminal. | 10-06-2011 |
20110255631 | METHODS AND APPARATUS FOR FAST SYNCHRONIZATION USING TAIL BITING CONVOLUTIONAL CODES - For use in a wireless communication network, a transmitter is configured to encode a message field in a control channel message by cyclically shifting the control channel message according to the value of the message field. The transmitter includes a CRC (cyclic redundancy check) encoder configured to encode the control channel message using a cyclic redundancy check. The transmitter may also includes a CIF (carrier indication field) encoder configured to encode a carrier indication value in the control channel message by cyclically shifting the control channel message according to the carrier indication value configured to indicate an intended component carrier of the control channel message. Alternatively, the transmitter may also include a frame timing encoder configured to encode frame timing in the control channel message by cyclically shifting the control channel message according to the frame timing. | 10-20-2011 |
20110271169 | TECHNIQUES FOR CYCLIC REDUNDANCY CHECK ENCODING IN COMMUNICATION SYSTEM - A method and apparatus for generating a Cyclic Redundancy Check (CRC) encoded message in a communication system are provided. The method includes generating the message, generating a first CRC for the message, generating a second CRC for the message, scrambling the first CRC by a first bit sequence of the message, and scrambling the second CRC by a second bit sequence of the message. The apparatus includes a message generator, a first CRC encoder, and a second CRC encoder. The message generator generates a message. The first CRC encoder generates a first CRC for the message, and scrambles the first CRC by a first bit sequence of the message. The second CRC encoder generates a second CRC for the message, and scrambles the second CRC by a second bit sequence of the message. | 11-03-2011 |
20120014308 | METHODS AND APPARATUS TO SUPPORT RECONFIGURATION IN SELF ORGANIZED WIRELESS COMMUNICATIONS AND NETWORKS - Prior to a change in a configuration, such as a change to the carrier frequency, bandwidth, base station type, and so forth of the base station, the base station can inform a subscriber station to prepare for the reconfiguration by sending a message to the subscriber station. The message informs the subscriber station regarding the change in configuration and a timing regarding the change. The base station can command the subscriber station to handover to the serving base station with the new configuration or the subscriber station can choose to handover to the serving base station with the new configuration. The subscriber station can perform network reentry to the serving base station with the new configuration at the time of or after the new configuration is effective. A communication context between the stations can be maintained and the network reentry can be optimized by omitting one or more operation procedures. | 01-19-2012 |
20120039270 | METHODS AND APPARATUS FOR UPLINK CONTROL TRANSMIT DIVERSITY - A method and apparatus in a user equipment transmit a subframe shared by multiple users through a dual-antenna transmission scheme by using space-time coding. A first and a second plurality of modulation symbols are generated. A third and a fourth plurality of modulation symbols are generated by performing Alamouti coding on each pair of modulation symbols in each of the first and second pluralities of modulation symbols. A spread matrix is generated for each modulation symbol such that the first and third pluralities of modulation symbols are mapped to a first slot of the subframe, and the second and third pluralities of modulation symbols are mapped to a second slot of the subframe. The subframe is transmitted such that the first and second pluralities of modulation symbols are transmitted via a first antenna, and the third and fourth pluralities of modulation symbols are transmitted via a second antenna. | 02-16-2012 |
20120127935 | METHOD FOR ENABLING COLLABORATION AMONG TERMINALS IN A WIRELESS NETWORK - A method for Mobile Station (MS) collaboration for a Downlink (DL) or Uplink (UL) transmission in a wireless network having MSs in a Base Station (BS) cell is provided. The DL transmission method includes forming a cluster of MSs having a same type of radio interface, receiving, by each MS, a DL transmission including a DL control channel message and a DL data burst, extracting, by the MSs, a DL data assignment included in the DL control channel message and indicating a receiving MS intended to receive the DL data burst, decoding, by the MSs, the DL data assignment and the DL data burst according to a determination to collaborate in the DL transmission, transmitting, by the collaborating MSs, a re-encoded DL data burst to the receiving MS, the receiving MS receiving the re-encoded DL data burst from the collaborating MSs and the DL data burst from the BS. | 05-24-2012 |
20120198305 | METHODS AND APPARATUS FOR FAST SYNCHRONIZATION USING QUASI-CYCLIC LOW-DENSITY PARITY-CHECK (QC-LDPC) CODES - For use in a wireless communication network, a transmitter is configured to encode information. The transmitter includes a cyclic redundancy check (CRC) encoder configured to encode a physical broadcast channel (PBCH) message using a cyclic redundancy check. The transmitter also includes a timing dependent cyclic shift block configured to encode information in the PBCH message. The transmitter further includes a quasi-cyclic low-density parity-check (QC-LDPC) encoder configured to encode the PBCH message using a QC-LDPC. | 08-02-2012 |
20120240001 | LDPC CODE FAMILY FOR MILLIMETER-WAVE BAND COMMUNICATIONS IN A WIRELESS NETWORK - A method constructs a family of low-density-parity-check (LDPC) codes. The method includes identifying a code rate for an LDPC code in the family, identifying a protograph for the LDPC code, and constructing a base matrix for the LDPC code. The base matrix is constructed by replacing each zero in the protograph with a ‘−1’, selecting a corresponding value for an absolute shift for each one in the protograph based on constraining a number of relative shifts per column of the LDPC code to one and increasing a size of a smallest cycle in a graph of the LDPC code, and replacing each one in the protograph with the corresponding value. | 09-20-2012 |
20120263254 | METHOD FOR TRANSMITTING PILOT SIGNAL IN MULTI-CARRIER WIRELESS TRANSMISSION SYSTEM - The present invention provides a method for transmitting pilots in a multi-carrier wireless transmission system. A wireless time-frequency transmission block is composed of N consecutive OFDM symbols in time domain and M consecutive physical sub-carriers in frequency domain, N and M are integers those are greater than or equal to 1. The method includes: partitioning the wireless time-frequency transmission block into several areas, and determining the position of pilots, of which the total number is a preset number, according to the time-frequency domain balancing principle of pilots of various antennas in various areas; inserting pilots at the pilot positions of each antenna corresponding to the antenna for transmission. In accordance with the present invention, the simultaneous transmission of multiple antennas is supported in a wireless time-frequency transmission block of a multi-carrier wireless transmission system. | 10-18-2012 |
20120307726 | METHODS AND APPARATUS TO TRANSMIT AND RECEIVE SYNCHRONIZATION SIGNAL AND SYSTEM INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A base station transmits a plurality of primary synchronization channel (PSC) symbols to a mobile station in a slot of a subframe of a frame-based wireless communication system. The base station also transmits a plurality of secondary synchronization channel (SSC) symbols to the mobile station in the slot of the subframe. The mobile station determines a preferred receiver beam based on the plurality of received consecutive PSC symbols. | 12-06-2012 |
20120320874 | APPARATUS AND METHOD FOR SUPPORTING NETWORK ENTRY IN A MILLIMETER-WAVE MOBILE BROADBAND COMMUNICATION SYSTEM - A method for a base station to support network entry of a mobile station in a communication system is provided. The method includes transmitting to the mobile station each of a plurality of transmitted network entry signals over a preferred downlink beam corresponding to the transmitted network entry signal. Each of a plurality of received network entry signals is received from the mobile station over a preferred uplink beam corresponding to the received network entry signal. Each of the transmitted network entry signals comprises the preferred uplink beam corresponding to a subsequently received network entry signal, and each of the received network entry signals comprises the preferred downlink beam corresponding to a subsequently transmitted network entry signal. | 12-20-2012 |
20130028341 | COMBINING BASEBAND PROCESSING AND RADIO FREQUENCY BEAM STEERING IN WIRELESS COMMUNICATION SYSTEMS - A method and apparatus enable combined baseband (BB) and radio frequency (RF) processing of signals. The method includes receiving, by a receiver, channel estimation information for a channel between a transmitter and the receiver. The method includes identifying a plurality of paths in the channel based on the channel estimation information. The method includes calculating an RF precoding matrix for precoding one or more signals to be transmitted on each of the identified paths. The RF precoding matrix includes a phase shift for each of the identified paths. Additionally, the method includes calculating a BB precoding matrix for precoding the one or more signals by a BB precoding unit associated with the transmitter. | 01-31-2013 |
20130044581 | 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. | 02-21-2013 |
20130057432 | METHOD AND APPARATUS FOR BEAM BROADENING FOR PHASED ANTENNA ARRAYS USING MULTI-BEAM SUB-ARRAYS - A transmitter or receiver may use beamforming methods for transmitting or receiving a signal in a communication system. The method for transmitting includes determining a first beamforming weight associated with a total number of antennas in an antenna array. The method also includes transmitting a first signal in a first beam having a first beam width using the total number of antennas by applying the first predetermined beamforming weight. The method further includes determining a second beamforming weight associated with a first sub-array of antennas in the antenna array and determining a third beamforming weight associated with a second sub-array of antennas in the antenna array. The method still further includes transmitting a second signal in a second beam having a second beam width using the first sub-array of antennas by applying the second beamforming weight and the second sub-array of antennas by applying the third beamforming weight. | 03-07-2013 |
20130077721 | METHODS AND APPARATUS FOR MIMO DETECTION - A transmitted signal estimate based on signals received in a layer i within a multiple input, multiple output transmission system and based upon selected constellation points for other, previously processed layers is quantized to a nearest constellation point. A list of candidates headed by the nearest constellation point and with remaining candidates presorted by proximity to the head is selected, for each such quantized estimate based on constellation point selections for previously processed layers. To select K best candidates for the transmitted signal estimates of the current layer i, the proximity of the candidates at the head of each list to the signal estimate for the current layer are compared, and the closest candidate is selected. The list containing the selected candidate is advanced, and proximity of the transmitted signal estimate to all list heads is again evaluated and the closest candidate selected. | 03-28-2013 |
20130115886 | APPARATUS AND METHOD FOR POLARIZATION ALIGNMENT IN A WIRELESS NETWORK - A system is configured to enable polarization alignment. The system includes at least one transmitter or receiver capable of polarization alignment. The transmitter includes at least one cross-polarized antenna and the receiver includes at least one cross-polarized antenna configured to receive a signal. A polarization processor in the transmitter or the receiver is configured to cause a polarization orientation of the at least one cross-polarized antenna to align with a polarization orientation of the signal. | 05-09-2013 |
20130121185 | APPARATUS AND METHOD FOR SUPPORTING MOBILITY MANAGEMENT IN COMMUNICATION SYSTEMS WITH LARGE NUMBER OF ANTENNAS - A base station and mobile station are configured to perform control beam association. A method at the base station includes transmitting at least one first control beam including reference signals on which the mobile station can perform a measurement. The method also includes receiving a first measurement report from the mobile station of the at least one first control beam. The method further includes, based on the first measurement report, selecting at least one of the at least one first control beam for at least one control channel for the mobile station to associate with. The method still further includes transmitting control information in the at least one control channel to the mobile station using the at least one selected control beam, the control information comprising at least one resource allocation indication for the mobile station. The at least one selected control beam is associated to the mobile station. | 05-16-2013 |
20130142136 | METHODS AND APPARATUS FOR ADAPTIVE WIRELESS BACKHAUL AND NETWORKS - A communication network includes a base station configured to wirelessly communicate first communication traffic with a first network entity using a first beam, and communicate second communication traffic with a second network entity using a second beam. Each of the first and second communication traffic includes at least one of backhaul traffic, wireless access traffic, and traffic for coordination in-between network entities. | 06-06-2013 |
20130155847 | METHODS AND APPARATUS TO ENHANCE RELIABILITY IN MILLIMETER WAVE WIDEBAND COMMUNICATIONS - A network node in a wireless network performs a method for enhancing reliability in wireless communication. The method includes determining, at a first network node, that a current link with a second network node is broken. The method also includes attempting, at the first network node, to recover the current link. The method further includes, upon a determination that the current link is not recoverable, establishing, at the first network node, a new link with the second network node according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules. | 06-20-2013 |
20130156120 | APPARATUS AND METHOD FOR REFERENCE SYMBOL TRANSMISSION IN AN OFDM SYSTEM - A base station is capable of communicating with a plurality of subscriber stations using a beamforming scheme that varies beams over different time instances. The base station includes a plurality of antenna arrays configured to transmit N spatial beams and carry a reference symbols corresponding to specific spatial beams. The base station also includes N | 06-20-2013 |
20130223251 | BEAM MANAGEMENT FOR WIRELESS COMMUNICATION - Methods and apparatuses manage beam selection. A method for a mobile station (MS) includes identifying beamforming constraints of the MS. The method also includes performing measurement on a channel between a base station (BS) and the MS on at least one transmit (TX) beam and at least one receive (RX) beam. Additionally, the method includes sending beamforming feedback information based on the identified constraints of the MS and the channel measurement. A method for a base station (BS) includes receiving beamforming feedback information comprising at least one of radio frequency beamforming constraints of a mobile station or channel measurement information on a channel between the BS and the MS. Additionally, the method includes sending, to the MS, control information comprising an indication of at least one of MS RX beams or BS TX beams to be used in downlink communication with the MS based on the received beamforming feedback information. | 08-29-2013 |
20130235742 | CHANNEL QUALITY INFORMATION AND BEAM INDEX REPORTING - A method and apparatus report or identify channel quality information. The method for reporting includes selecting one or more beams for channel quality reporting. The method also includes mapping, by the UE, indices of the one or more selected beams to one or more channel quality values. Additionally, the method includes sending channel quality information for the one or more selected beams according to the mapping. The method for identifying includes receiving an indication of indices of one or more beams selected for reporting. The method also includes receiving channel quality information for the one or more selected beams. The method further includes identifying a mapping of the indices of the one or more selected beams to one or more channel quality values. Additionally, the method includes identifying a channel quality value for each of the one or more selected beams according to the mapping. | 09-12-2013 |
20130235851 | METHODS AND APPARATUS TO TRANSMIT AND RECEIVE SYNCHRONIZATION SIGNALS IN A MOBILE COMMUNICATION SYSTEM - Beam-steered millimeter wave signals transmitted in each of n sector slices include a sequence of primary synchronization (PSCH) symbols within predetermined symbol positions in at least one slot of a subframe. The symbols in consecutive symbol positions are each transmitted on a different one of the n slices, with the first symbol repeated on the same slice at the end. The sequence order rotates cyclically in each subframe so that two PSCH symbols are transmitted on one slice in a single subframe every nth subframe. Secondary synchronization (SSCH) and Broadcast Channel (BCH) symbols are transmitted in a predetermined pattern following the sequence of PSCH symbols. By transmitting consecutive PSCH symbols on different slices and repeating the first symbol, the mobile station can detect the best slice and beam by switching receive beams every subframe instead of every slot, relaxing time constraints on AGC adjustment while avoiding the start-at-the-edge problem. | 09-12-2013 |
20130237218 | METHODS AND APPARATUS FOR CELL SCANNING IN SYSTEM WITH LARGE NUMBER OF ANTENNAS - A mobile station is configured to scan cells in a wireless network. The mobile station includes at least one antenna configured to transmit and receive wireless signals. The mobile station also includes a processor coupled to the at least one antenna, the processor configured to scan for one or more neighboring base station cells in a same frequency band as a serving base station cell using one or more receive beams. The one or more receive beams used for scanning are different than receive beams used for data communication with the serving base station cell. | 09-12-2013 |
20130272220 | METHODS AND APPARATUS FOR FLEXIBLE BEAM COMMUNICATIONS IN RANDOM ACCESS IN SYSTEM WITH LARGE NUMBER OF ANTENNAS - A mobile station performs a method for random access in a wireless network. The method includes receiving, from a base station, information regarding a configuration of at least one receive beam of the base station to receive a random access signal. The method also includes configuring at least one transmit beam for a transmission of the random access signal based on the configuration information from the base station. The method further includes transmitting the random access signal to the base station on the at least one transmit beam. | 10-17-2013 |
20130272263 | HIERARCHICAL CHANNEL SOUNDING AND CHANNEL STATE INFORMATION FEEDBACK IN MASSIVE MIMO SYSTEMS - Time, frequency and spatial processing parameters for communications between a base station and a mobile station are selected by transmitting synchronization signals in multiple slices of a wireless transmission sector for the base station, and receiving feedback from the mobile station of at least one preferred slice of the multiple slices. In response to selection of one of the slices as an active slice for communications between the base station and the mobile station, reference signals are transmitted in the selected active slice using a corresponding selected precoder and/or codebook. The mobile station estimates and feeds back channel state information (CSI) based on those reference signals, and the CSI is then employed to determine communication parameters for communications between the base station and mobile station that are specific to the mobile station. | 10-17-2013 |
20130286960 | APPARATUS AND METHOD FOR CONTROL CHANNEL BEAM MANAGEMENT IN A WIRELESS SYSTEM WITH A LARGE NUMBER OF ANTENNAS - A base stations (BS) are configured to perform a coordinated transmission to at least one user equipment (UE). The BS includes a plurality of antenna configured to communicate with the UE. The BS also includes processing circuitry coupled to the plurality of antennas and configured to transmit physical downlink control channel (PDCCH) to the at least one user equipment. The UE includes a plurality of antennas configured to communicate with the BS. The UE also includes a processing circuitry coupled to the plurality of antennas and configured to receive PDCCH from the BS. The PDCCH is included in one or more transmit (Tx) beams. A Tx beam is defined by the cell specific reference signal (CRS) transmitted through the Tx beam. A Tx beam is configured to carry a beam identifier, and the PDCCH is configured to include resource allocation information for the user equipment. | 10-31-2013 |
20130301563 | PILOT DESIGN FOR MILLIMETER WAVE BROADBAND - A transmitter in a wireless network configured to utilize a pilot design and channel estimation strategy to reduce pilot overhead, the pilot design based on a channel decomposition of the channel in a ray tracing channel model. A method of using a three tiered pilot design in a millimeter wave broadband (MMB) wireless network to estimate channel state information (CSI) may include assigning a first tier pilot to a first set of resource blocks, assigning a second tier pilot to second set of resource blocks, assigning a third tier pilot in a third set of resource blocks. When two of the pilots are assigned to a common resource block, the lower tier pilot may be given preference over the higher tier pilot. | 11-14-2013 |
20130301619 | METHODS AND APPARATUS FOR UPLINK TIMING ALIGNMENT IN SYSTEM WITH LARGE NUMBER OF ANTENNAS - A mobile station is configured to perform a method for uplink timing alignment in a wireless network. The method includes receiving a first downlink synchronization signal from a base station on a first beam pair at a first time associated with a first propagation delay. The method also includes receiving a second downlink synchronization signal from the base station on a second beam pair at a second time associated with a second propagation delay. The method further includes determining a second timing advance for the second beam pair based on a known first timing advance for the first beam pair and a time difference between the first time and the second time. | 11-14-2013 |
20130315321 | METHODS AND APPARATUS FOR CYCLIC PREFIX REDUCTION IN MMWAVE MOBILE COMMUNICATION SYSTEMS - To reduce the duration of a cyclic prefix used for a multiple input, multiple output (MIMO) communications channel, delay spread variations for different transmit/receive beam pair combination is estimated and used for fast beam switching and to support single user MIMO (SU-MIMO) even when the CP difference between two beams is large. Beam switching reference signals are employed to estimate delay spread exceeding current CP, and to support beam switching. CP covering sub-clusters within clusters for the MIMO channel are exploited to reduce the CP requirement and improve efficiency. Any one of a number of different CP durations may be selected for each different mobile station, using one of a finite set of subframe configurations for which the CP durations of different symbol locations within the subframe are predefined. Dynamically switching subframe configurations by the system accommodates high mobility. | 11-28-2013 |
20130322280 | UPLINK CHANNEL SOUNDING AND CHANNEL STATE INFORMATION ESTIMATION IN MOBILE COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS - A system includes a base station configured to communicate with a plurality of mobile stations. The base station transmits downlink timing synchronization and establishes frequency synchronization with at least one of the plurality of mobile stations. The base station receives, from the mobile station, at least one of: coarse sounding reference signal (SRS), and fine SRS. The base processes at least one of the coarse SRS to enable tracking of the preferred uplink (UL) slice for uplink transmissions, and the fine SRS in order to resolve a short-term small-scale channel state information (CSI), estimate a CSI from at least one of the coarse SRS and fine SRS, and perform uplink scheduling and grant. The mobile station performs uplink scheduling request and uplink data communication. | 12-05-2013 |
20140003369 | METHODS AND APPARATUS FOR UPLINK CONTROL CHANNEL MULTIPLEXING IN BEAMFORMED CELLULAR SYSTEMS | 01-02-2014 |
20140010181 | METHODS AND APPARATUS FOR DOWNLINK PDSCH POWER SETTING - Methods and apparatus for transmitting power setting information in a downlink Physical Downlink Shared Channel (PDSCH) in a communication system. In this communication system, a plurality of methods for calculating traffic-to-pilot ratios (T2P) are established. In addition, a mapping scheme between a plurality of overhead signals and a plurality of reference signal (RS) overhead ratios, η | 01-09-2014 |
20140016573 | APPARATUS AND METHOD FOR RANDOM ACCESS WITH MULTIPLE ANTENNAS IN A WIRELESS NETWORK - A base station enables a mobile station to employ a random access retransmission scheme in a wireless communication network. The mobile station includes a plurality of antennas configured to communicate with the base station. The mobile station also includes a processing circuitry coupled to the plurality of antennas. The processing circuitry is configured to perform a random access during a random access channel (RACH) burst. The processing circuitry also is configured to at least one of: transmit a random access signal with at least one of an initial transmit power level and an initial transmit beamwidth, and, in response to a random access attempt failure, change at least one of a transmit (Tx) power level and a Tx beamwidth and retransmit the random access signal. | 01-16-2014 |
20140016620 | METHODS AND APPARATUS FOR TRANSMISSION OF UPLINK SOUNDING REFERENCE SIGNALS IN A COMMUNICATION SYSTEM WITH LARGE NUMBER OF ANTENNAS - Methods for preventing timing collisions in a wireless communication network include transmitting a data uplink symbol of normal duration via a first base pair using a first timing advance (TA) corresponding to the first base pair. Scheduling to transmit a second uplink symbol via a second base pair (BP) corresponding to the transmit RF chain. Predicting a timing collision will occur based on a different between the first TA and a second TA corresponding to the second BP. Preventing the timing collision by: reducing the duration of the second symbol by an adjustment amount calculated based on the first TA and the second TA; inserting a guard interval to delay transmission of the second symbol by the calculated adjustment amount; and increasing the duration of a cyclic prefix of the second symbol but refraining from transmitting a portion of the enlarged CP. | 01-16-2014 |
20140018012 | PHYSICAL BROADCAST CHANNEL (PBCH) TRANSMISSION FOR RELIABLE DETECTION OF ANTENNA CONFIGURATION - Reliable detection of the configuration of transmit antennas includes obtaining a data for transmission, encoding the data, and modulating the data. During the modulating of the data, the data may be configured in such a way as to convey the configuration of the antennas through the modulation of the data. An antenna configuration is obtained by obtaining a representation of the antenna configuration, and masking the data with an error correcting code, where the mask corresponds to the antenna configuration. | 01-16-2014 |
20140044044 | METHOD AND APPARATUS TO SUPPORT CHANNEL REFINEMENT AND MULTI-STREAM TRANSMISSION IN MILLIMETER WAVE SYSTEMS - Methods and apparatus for sending and receiving mobile station (MS) specific channel state indication reference symbols (CSI-RS) is provided. A common CSI-RS is sent from a base station (BS) and is received by an MS. First feedback is sent to the BS from the MS based on the common CSI-RS. A configuration of an MS-specific CSI-RS is sent from the BS and received by the MS. An MS specific CSI-RS is sent from the BS and is received by the MS. Second feedback is sent to the BS from the MS based on the MS specific CSI-RS. | 02-13-2014 |
20140071913 | METHODS AND APPARATUS FOR MAPPING MODULATION SYMBOLS TO RESOURCES IN OFDM SYSTEMS - A transmission resource in a time domain subframe is divided into a plurality of equal duration resource elements in a time and frequency domain, the plurality of resource elements are segregated into a plurality of resource regions, information to be transmitted is modulated to generate a sequence of modulation symbols at a transmitter, the sequence of modulation symbols is mapped into the plurality of resource elements in the plurality of resource regions, and the modulation symbols are transmitted via a plurality of antennas using the respective corresponding resource elements to a receiver. The mapping of the modulation symbols in at least one resource region is independent of a certain control channel information that is carried in the time domain subframe, and the mapping of the modulation symbols in at least another resource region is dependent upon that certain control channel information. | 03-13-2014 |
20140098912 | HIGH-THROUGHPUT BEAMFORMING MIMO RECEIVER FOR MILLIMETER WAVE COMMUNICATION AND METHOD - A receiver in a communication system is provided that includes a synchronization module and a channel estimator. The synchronization module is configured to identify an end of a cyclic prefix (CP) in a received signal using slope detection by monitoring a detection metric threshold in the received signal. The channel estimator is configured to estimate a complex noise variance using guard band subcarriers. | 04-10-2014 |
20140133409 | ASYNCHRONOUS HYBRID ARQ PROCESS INDICATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - Asynchronous Hybrid Automatic Repeat reQuest (ARQ) process identities are transmitted in a wireless communication system. A linking scheme is established between at least two sets of process identities of two respective corresponding codewords. When a first process identity is selected from among a first set of process identities of a first codeword, a second process identity may be derived in dependence upon the first process identity and the established linking scheme. Finally, a first packet from the first codeword is transmitted using a first transmission channel indicated by the first process identity, and a second packet is transmitted from the second codeword using a second transmission channel indicated by the second process identity. In addition, a control message including only the first process identity is transmitted. | 05-15-2014 |
20140160916 | 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. | 06-12-2014 |
20140177607 | METHOD AND APPARATUS FOR RANDOM ACCESS IN COMMUNICATION SYSTEM WITH LARGE NUMBER OF ANTENNAS - A method for performing random access by a User Equipment (UE) in a wireless network, comprises configuring at least one UE transmit beam for a transmission of a random access signal, generating the at least one UE transmit beam using an antenna array according to the configuration, and transmitting the random access signal to a base station (BS) on the at least one UE transmit beam. An user equipment for performing random access in a wireless network, the User Equipment comprises a processing circuit configured to configure at least one UE transmit beam for a transmission of a random access signal, and generate the at least one UE transmit beam using an antenna array according to the configuration, and transmit the random access signal to the Base Station (BS) on the at least one UE transmit beam. | 06-26-2014 |
20140198696 | APPARATUS AND METHOD FOR DISCONTINUOUS RECEIVE IN COMMUNICATION SYSTEMS WITH LARGE NUMBER OF ANTENNAS - A user equipment (UE) performs a method for supporting discontinuous receive (DRX) in a wireless network. The method includes waking up at a wake up time associated with a beginning of a DRX cycle, the DRX cycle comprising a plurality of subframes. The method also includes determining whether to perform receive beam training before a beginning of a time period for downlink communication. The method further includes receiving data during the time period for downlink communication. | 07-17-2014 |
20140349697 | PHYSICAL BROADCAST CHANNEL (PBCH) TRANSMISSION FOR RELIABLE DETECTION OF ANTENNA CONFIGURATION - Reliable detection of the configuration of transmit antennas includes obtaining a data for transmission, encoding the data, and modulating the data. During the modulating of the data, the data may be configured in such a way as to convey the configuration of the antennas through the modulation of the data. An antenna configuration is obtained by obtaining a representation of the antenna configuration, and masking the data with an error correcting code, where the mask corresponds to the antenna configuration. | 11-27-2014 |
20150066413 | METHOD FOR CORRECTING ERRORS ASSOCIATED WITH ASYNCHRONOUS TIMING OFFSETS BETWEEN TRANSMIT AND RECEIVE CLOCKS IN MRI WIRELESS RADIOFREQUENCY COILS - A method and apparatus correcting errors associated with timing offsets in radiofrequency coils. The method and apparatus include a memory element and a controller. The controller is configured to execute a set of instructions to receive data of a plurality of signals, the plurality of signals comprising at least one projection echo. The controller is also configured to identify a plurality of offsets of the plurality of signals based on the at least one projection echo. The controller is also configured to apply the plurality of offsets to a k-space of the plurality of signals. | 03-05-2015 |