| Patent application number | Description | Published |
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| 20080225791 | METHODS FOR TRANSMITTING MULTIPLE ACKNOWLEDGMENTS IN SINGLE CARRIER FDMA SYSTEMS - A mapping scheme between a plurality of control channel element sets and a plurality of acknowledgement channel resource sets is established. Each of the control channel element sets includes at least one control channel element, and each of the acknowledgement channel resource sets includes at least one acknowledgement channel resource. In accordance with a scheduling grant transmitted using a control channel element set selected from the plurality of control channel element sets, a data packet is transmitted via a second node to a first node. Then, an acknowledgement channel message is transmitted via the first node to the second node by using at least one acknowledgement channel resource selected from the acknowledgement channel resource set that correspond to the control channel element set used for transmitting the scheduling grant in accordance with the mapping scheme. The acknowledgement channel message may be one of a positive acknowledgement message and a negative acknowledgement message. | 09-18-2008 |
| 20080225965 | METHODS AND APPARATUS TO IMPROVE PERFORMANCE AND ENABLE FAST DECODING OF TRANSMISSIONS WITH MULTIPLE CODE BLOCKS - A method includes separating resource elements from multiple code blocks into different groups, and decoding the code bits of the resource elements within each group without waiting for a completed reception of a transport block to start decoding. | 09-18-2008 |
| 20080232307 | Method and apparatus to allocate resources for acknowledgments in communication systems - A method and apparatus for transmission between a plurality of units of user equipment and a base station in a wireless communication system. For each of the units of user equipment, a plurality of control channel elements are mapped to a plurality of downlink acknowledgement channel resources in accordance with a first mapping scheme, and the plurality of control channel elements are mapped to a plurality of uplink acknowledgement channel resources in accordance with a second mapping scheme. The first mapping scheme and the second mapping scheme may be different for different units of user equipment. Alternatively, the first mapping scheme and the second mapping scheme may change over time. | 09-25-2008 |
| 20080232449 | Efficient uplink feedback in a wireless communication system - A method for transmitting control information by transmitting a reference signal from a first transceiver to a second transceiver, in response to the reception of the reference signal, determining at the second transceiver a plurality of control channel elements based upon the received reference signal, jointly encoding the plurality of control channel elements at the second transceiver to generate a control signal, and transmitting the control signal from the second transceiver to the first transceiver. | 09-25-2008 |
| 20080232487 | Synchronous spectrum sharing by dedicated networks using OFDM/OFDMA signaling - A system and method for synchronous spectrum sharing for a dedicated network in a wireless communication system based on orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) signaling is disclosed. The system and method includes detecting a frame of a broadcast waveform and extracting idle spectrum information from a subframe associated with the dedicated subchannel to the secondary user node. The system allows transmitting data from the secondary user node in unused symbol slots identified in the idle spectrum information thereby making efficient use of unused or idle spectrum. Accordingly, secondary users of the wireless communication system can dynamically form ad-hoc mesh network communications in fixed or mobile scenarios. | 09-25-2008 |
| 20080232489 | Spatial interleaver for MIMO wireless communication systems - A method for transmission is provided to include demultiplexing information to be transmitted into a plurality of stream blocks, encoding each of the stream blocks according to a corresponding coding scheme to generate a plurality of encoded streams, interleaving the plurality of encoded streams in a bit-level to generate a plurality of bit-level interleaved streams, modulating each of the bit-level interleaved streams according to a corresponding modulation scheme to generate a plurality of modulated symbol streams, interleaving the plurality of modulated symbol streams in a symbol-level to generate a plurality of symbol-level interleaved streams, precoding the plurality of symbol-level interleaved streams according to a precoding scheme to generate a plurality of precoded streams, and transmitting the plurality of precoded streams via a plurality of antennas. | 09-25-2008 |
| 20080240028 | Filtering and guard band for non-synchronized transmission - A wireless terminal capable of communicating with a wireless communication system comprised of a plurality of wireless terminals and a plurality of base stations. The wireless terminal selects a sequence from a group of certain sequences for random access. At least one sub-carriers on an uplink channel including at least one data channel is allocated for at least one random access channel. Each data channel includes a continuous set of data sub-carriers. The wireless terminal then filters the at least one random access channel by applying a Raised Cosine filter, maps the selected sequence to the at least one random access channel to generate a random access channel signal, and transmits the random access channel signal to a base station. | 10-02-2008 |
| 20080267158 | TRANSMIT DIVERSITY FOR ACKNOWLEDGEMENT AND CATEGORY 0 BITS IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting acknowledgement/nonacknowledgement (ACK/NACK) signals including multiplexing ACK/NACK signals; and repeatedly transmitting for predetermined times the multiplexed signal with each of repetitions of transmitting the multiplexed signal being spread in a frequency domain and being mapped to a plurality of discrete resource units each having a pair of neighboring subcarriers and a predetermined number of Orthogonal Frequency Division Multiplexing (OFDM) control symbols. | 10-30-2008 |
| 20080267310 | Transmit diversity in a wireless communication system - A method for transmitting data via multiple antennas by modulating data to be transmitted into a plurality of modulated symbols, encoding each pair of modulated symbols from among said plurality of symbols in accordance with a transmission diversity scheme to result in a plurality of N by N matrices, with each N by N matrix corresponding to each pair of modulated symbols, generating a M by M code matrix comprised of the plurality of N by N matrices, orthogonally spreading the M by M code matrix to generate an output matrix, generating a plurality of row-permuted matrices by exchanging at least one pair of rows in the output matrix, and transmitting the symbols in the plurality of row-permuted matrices via a plurality of antennas by using either a space time transmission diversity scheme, a space frequency transmission diversity scheme, or a combination of a space time transmission diversity scheme and a space frequency transmission diversity scheme. | 10-30-2008 |
| 20080273452 | Antenna mapping in a MIMO wireless communication system - A method for transmission is provided to generate a plurality of reference signals for a plurality of antenna ports, with each reference signal corresponding to an antenna port; to map the plurality of reference signals to a plurality of physical antennas in accordance with a selected antenna port mapping scheme, with each reference signal corresponding to a physical antenna, and the plurality of physical antennas being aligned sequentially with equal spacing between two immediately adjacent physical antennas; to demultiplex information to be transmitted into a plurality of stream blocks; to insert a respective cyclic redundancy check to each of the stream blocks; to encode each of the stream blocks according to a corresponding coding scheme; to modulate each of the stream blocks according to a corresponding modulation scheme; to demultiplex the stream blocks to generate a plurality of sets of symbols, with each stream block being demultiplexed into a set of symbols; to map the plurality of sets of symbols into the plurality of antenna ports in accordance with a selected symbol mapping scheme; and to transmit the plurality of sets of symbols via the corresponding antenna ports, with each set of symbols being transmitted via a subset of antenna ports, with, within each subset of antenna ports, the distance between the physical antennas of the corresponding antenna ports being larger than the average distance among the plurality of physical antennas. | 11-06-2008 |
| 20080279301 | Multiple antennas transmit diversity scheme - A method from transmitting data via multiple antennas. The method contemplates modulating data to be transmitted into a plurality of modulated symbols, encoding each pair of modulated symbols from among said plurality of symbols in accordance with a transmission diversity scheme to result in a plurality of 2 by 2 matrices, with each 2 by 2 matrix corresponding to each pair of modulated symbols, orthogonally spreading the plurality of 2 by 2 matrices to generate an output matrix, and transmitting the symbols in the output matrix via a plurality of antennas by using either a space time transmission diversity scheme, a space frequency transmission diversity scheme, or a combination of a space time transmission diversity scheme and a space frequency transmission diversity scheme. | 11-13-2008 |
| 20080298224 | Methods and apparatus for mapping modulation symbols to resources in OFDM systems - A method for transmission, by dividing a transmission resource in a time domain subframe into a plurality of equal duration resource elements in a time and frequency domain, segregating the plurality of resource elements into a plurality of resource regions, modulating information to be transmitted to generate a sequence of modulation symbols at a transmitter, mapping the sequence of modulation symbols into the plurality of resource elements in the plurality of resource regions, and transmitting the modulation symbols 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 said time domain subframe, and the mapping of the modulation symbols in at least another resource region is dependent upon said certain control channel information that is carried in said subframe. The information to be transmitted may be encoded to generate a plurality of code blocks, with roughly equal number of resource elements assigned to each of the plurality of code blocks in at least one resource region. Alternatively, the time domain subframe may contain only one resource region. | 12-04-2008 |
| 20080298482 | Multi-user MIMO feedback and transmission in a wireless communication system - The present invention provides a method for feedback and transmission of multi-user (MU) multiple input multiple output (MIMO) in a wireless communication system. The method includes steps of selecting subset codebook or full code book based on traffic load of a base station, and broadcasting the selected codebook to user equipments. In high traffic load, subset codebook is selected, and in low traffic load, full codebook is selected. User stations calculated a channel quality indicator of a spatial codeword vector that is included in the selected codebook. Information of the maximum channel quality indicator is sent to the base station together with a precoder of the user equipment. The base station selects user equipments based on the information of the maximum channel quality indicator and precoder, and transmits precoder signal and data signal to the user equipments. The present invention also provides a system for the base station that causes the base station to perform the above mentioned operations. | 12-04-2008 |
| 20080303699 | MIMO wireless precoding system robust to power imbalance - The present invention relates to methods and apparatus for preventing power imbalance in a multiple input multiple output (MIMO) wireless precoding system. According to one aspect of the present invention, a codebook is constructed with a first subset of codewords that are constant modulus matrices, and a second subset of codewords that are non-constant modulus matrices. A mapping scheme is established between the first subset of codewords and the second subset of codewords. When a unit of user equipment feeds back a first codeword that is a non-constant modulus matrix, the Node-B may replace the first codewords with a second codeword that is selected from the first subset of codewords and that corresponds to the first codeword in accordance with the mapping scheme. | 12-11-2008 |
| 20080304593 | Transmission symbols mapping for antenna diversity - Methods and apparatus for transmitting data via multiple antennas by using antenna diversity. A transmission diversity scheme is established such that two transmission matrices that are in accordance with the space frequency block code combined with Frequency switched transmit diversity (SFBC+FSTD) scheme, are alternatively applied in either the frequency domain, or the time domain, or both of the frequency domain or then time domain. The symbols in the transmission matrices may be transmitted either as one burst in a primary broadcast channel (PBCH), or as discrete bursts in the primary broadcast channel. | 12-11-2008 |
| 20080307427 | Methods and apparatus for channel interleaving in OFDM systems - A method and apparatus for channel interleaving in a wireless communication system. In one aspect of the present invention, the data resource elements are assigned to multiple code blocks, and the numbers of data resource elements assigned to each code block are substantially equal. In another aspect of the present invention, a time-domain-multiplexing-first (TDM-first) approach and a frequency-domain-multiplexing-first (FDM-first) approach are proposed. In the TDM-first approach, at least one of a plurality of code blocks are assigned with a number of consecutive data carrying OFDM symbols. In the FDM-first approach, at least one of the plurality of code blocks are assigned with all of the data carrying OFDM symbols. Either one of the TDM first approach and the FDM-first approach may be selected in dependence upon the number of the code blocks, or the transport block size, or the data rate. | 12-11-2008 |
| 20090006518 | Simple MIMO precoding codebook design for a MIMO wireless communications system - The present invention relates to methods and apparatus for establishing a precoding codebook for a Multiple Input Multiple Output (MIMO) wireless communication system. The precoding codebook includes a plurality of codebook entries. Each codebook entry includes four sets of vectors for four respective corresponding transmission ranks. The vectors may be predetermined, or generated from source unitary matrices. In addition, the codebook is fully nested. | 01-01-2009 |
| 20090015443 | Transmit methods for CCFI/PCFICH in a wireless communication system - A method of transmitting a control channel format indicator (CCFI), also known as PCFICH (Physical Control Format Indicator Channel), in case where the length of a coded CCFI is not an integer multiple of three, including mapping a plurality of two-bit CCFI into a codebook with each component codeword having three bits; generating a sequence of codewords selected from the codebook by repeating the selected component codeword for predetermined times; generating a codeword by concatenating the sequence of the selected component codewords with the original CCFI bits; and transmitting the codeword carrying information of CCFI. The method further includes a step of generating a permutation of each of the four codewords by assigning K repetitions of the three-bit component codeword to the number of K resource units respectively and mapping remaining K bits of each of the four codewords separately to the number of K resource units. | 01-15-2009 |
| 20090019337 | Methods and apparatus to compute CRC for multiple code blocks - A method and a circuit for generating cyclic redundancy checks. The method calculates a plurality of cyclic redundancy checks for a transport block with a plurality of information bits. At least one cyclic redundancy check among the plurality of cyclic redundancy checks is calculated based on a subset of information bits, and at least one information bit among the plurality of information bits is not within said subset of the information bits. In addition, a transport block cyclic redundancy check may be calculated based on all the information bits. | 01-15-2009 |
| 20090028129 | Rate matching for hybrid ARQ operations - A method of rate matching process of the hybrid Automatic Repeat reQuestion (HARQ) operation in which coded bits are selected for a transmission depends on whether the transmission is a first transmission of a new packet or a retransmission of an existing packet. In downlink of long term evolution (LTE) system, a downlink grant message is transmitted along with the packet data transmission. The grant message may also contain the redundancy version (RV). A new data indicator (NDI) is introduced to indicate the start of a new packet. The improved method of rate matching may be implanted into either a transmitter or a receiver. | 01-29-2009 |
| 20090028264 | Transmit methods with delay diversity and space-frequency diversity - In this invention, several open-loop solutions that encompass the small delay CDD codeword cycling, codeword cycling between different re-transmissions of both small and large delay CDD are proposed. In addition, an open-loop codeword cycling method for SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ, are proposed. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas. | 01-29-2009 |
| 20090041151 | Pilot boosting and traffic to pilot ratio estimation in a wireless communication system - Methods and circuits for assigning pilot boosting factors and calculating traffic to pilot ratios in a wireless communication system. The data to be transmitted is first modulated to generate a plurality of data modulation symbols. The plurality of data modulation symbols and a plurality of reference signal symbols are mapped into transmission resources of each of a plurality of antennas in accordance with a transmit diversity scheme. The transmission resources of each of the antennas are divided into a plurality of subcarriers in a frequency domain and a plurality of time units in a time domain. Then, a power scaling factor are assigned for data modulation symbols on each of the antennas in dependence upon power levels of the reference signal symbols to maintain a fixed power level across the plurality of antennas in each time unit. Finally, the data modulation symbols and the reference signal symbols are transmitted via the plurality of antennas in accordance with the mapping scheme and the assigned scaling factors. | 02-12-2009 |
| 20090059884 | Transmission methods for downlink ACK/NACK channels - A method from transmitting data via multiple antennas. In this method, four information bits to be transmitted are multiplexed by using either one of a code division multiplexing scheme or a second code division multiplexing scheme combined with a real and imaginary multiplexing scheme, to generate a code division multiplexed symbol including four vectors. Then, the code division multiplexed symbol is repeatedly transmitted by alternatively applying two transmit diversity schemes via four transmission antennas. | 03-05-2009 |
| 20090077456 | Methods and apparatus to generate multiple CRCs - Methods and apparatus for generating cyclic redundancy checks (CRCs). In one aspect of the present invention, a plurality of cyclic redundancy checks are calculated based upon a plurality of bits by using a selected cyclic redundancy check generator polynomial, at least one cyclic redundancy check is calculated based upon a first subset of the plurality of bits with a certain bit ordering, and at least another cyclic redundancy check is calculated based upon a second subset of the plurality of bits with a different bit ordering. The second subset of bits may overlap with the first subset of bits. In another aspect, a plurality of cyclic redundancy checks are calculated based upon a plurality of bits by using a plurality of different cyclic redundancy check generator polynomials. A first cyclic redundancy check generator polynomial is used for calculating a first cyclic redundancy check based upon a first plurality of bits, and a second cyclic redundancy check generator polynomial is used for calculating a second cyclic redundancy check based upon a second plurality of bits. | 03-19-2009 |
| 20090080549 | Efficient MIMO precoding feedback scheme - Methods and apparatus for efficiently feeding back preceding information in a multiple input multiple output (MIMO) system. A codebook including a plurality of codebook entries is constructed. A plurality of subsets of codebook entries are defined for the codebook. Each subset includes a plurality of codebook entries. A subset of codebook entries is selected for precoding data in dependence upon a channel condition, and a codebook entry is selected from the subset. Then, a subset index corresponding to the selected subset, and a codebook entry index corresponding to the selected codebook entry within the selected subset, is transmitted as feedback information. | 03-26-2009 |
| 20090086849 | Method and apparatus of improved circular buffer rate matching for turbo-coded MIMO-OFDM wireless systems - Methods and apparatus for determining the starting points of redundancy version transmissions in a circular rate matching operation. At least one block of information bits to be transmitted are encoded to generate a plurality of coded bits, which are then segmented into a plurality of sub-blocks of coded bits. Each of the sub-blocks of coded bits is interleaved by using a certain interleaver. The interleaved coded bits of the plurality of sub-blocks are collected and filled into a circular buffer having a plurality of redundancy versions in the circular buffer, with each redundancy version corresponding to a starting bit index in the circular buffer. For each transmission, a subset of bits are selected from the circular buffer by selecting a redundancy version from among the plurality of redundancy version. The selected subset of bits are modulated by using a certain modulation scheme, and are transmitted via at least one antenna. The redundancy versions of the circular being determined such that in at least one pair of redundancy versions, the number of bits between the starting point of a first redundancy version and the starting point of a second redundancy version is not divisible by at least one modulation order. | 04-02-2009 |
| 20090092148 | RESOURCE REMAPPING AND REGROUPING IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus for remapping and regrouping transmission resources in a wireless communication system. First, a set of new permutation algorithms based on Galois field operation is proposed. Then the proposed algorithms and the known Pruned Bit Reversal Ordering (PBRO) algorithm are applied to several of various resource mapping schemes, including slot or symbol level Orthogonal Cover (OC)/Cyclic Shift (CS) mapping, cell-specific slot-level and symbol-level CS hopping patterns, and subframe and slot level base sequence hopping patterns. | 04-09-2009 |
| 20090098876 | Asynchronous hybrid ARQ process indication in a MIMO wireless communication system - Methods and apparatus for transmitting Asynchronous Hybrid Automatic Repeat reQuest (ARQ) process identities 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. | 04-16-2009 |
| 20090131064 | METHOD AND SYSTEM FOR SUBCARRIER DIVISION DUPLEXING - A wireless communication network comprising a plurality of base stations capable of wireless communication with a plurality of subscriber stations within a coverage area of the network, wherein at least one base station of the plurality of base stations is capable of assigning available subcarriers in a bandwidth to one of a set of transition guard sub-carriers and a set of communication subcarriers, wherein the set of transition guard sub-carriers are non-identical to and overlap a set of transition guard subcarriers of a neighboring base station. | 05-21-2009 |
| 20090147865 | Uplink feedback for supporting MIMO operation in the LTE downlink - A quantization method of transmission of channel quality information (CQI) includes measuring two measurements SINRs and calculating a difference (i.e., Delta SINR) between the two measurements of the SINRs; determining a CQI | 06-11-2009 |
| 20090149207 | Physical broadcast channel (PBCH) transmission for reliable detection of antenna configuration - Systems and methods for transmitting data related to the configuration of transmit antennas are disclosed. These methods may include 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 data through the modulation of the data. These methods may also include obtaining an antenna configuration, obtaining a representation of the antenna configuration, and masking the data with an error correcting code, where the mask corresponds to the antenna configuration. | 06-11-2009 |
| 20090163142 | Methods and apparatus for channel quality indication feedback in a communication system - Methods and apparatus for feeding back channel quality indication in a communication system. First, a first channel quality indication index is determined in dependence upon a channel quality estimation of a first transmission channel, and a second channel quality indication index is determined in dependence upon a channel quality estimation of a second transmission channel. A differential channel quality indication index of the second channel quality indication index is determined with reference to the first channel quality indication index in dependence upon a differential compression scheme. Then, the first channel quality indication index and the differential channel quality indication index are reported. | 06-25-2009 |
| 20090175371 | 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 | 07-09-2009 |
| 20090253447 | Message-based approach for improved interference power estimation - A method of operating a base station comprising determining one or more time-frequency resources to be used for interference power estimation, generating a message indicating the one or more time-frequency resources to be used for interference power estimation, and transmitting the message to a subscriber station. | 10-08-2009 |
| 20090254790 | Methods and apparatus to improve communication in a relay channel - A system and method for relaying data communications in a Hybrid Automatic Repeat Request (HARQ) network. The system and method operable to receive a data communication packet from a base station during a first transmission time interval and simultaneously receive an acknowledgement signal from a subscriber station; and transmit a data communication packet to a subscriber station during a second transmission time interval and simultaneously transmit an acknowledgement signal to a base station. | 10-08-2009 |
| 20090268680 | SIGNALING FORMATS FOR INDICATING UNUSED RESOURCE BLOCKS IN LTE SYSTEMS - Systems and methods are disclosed for use in a wireless communication system including a base station configured to identify unused PRBS. This base station includes a communication unit that is in communication with at least one subscriber station and a processor configured to identify at least one PRB as unused. Upon determining that at least one PRB is unused, the base station transmits information related to the unused PRBs to the at least one subscriber station through a control message. | 10-29-2009 |
| 20090268790 | Methods and apparatus for network coding in a communication system - A system and method for relaying communications in a wireless communication network. A relay station capable of relaying wireless communications includes a plurality of receiver antennas and a plurality of transmitter antennas. The plurality of receiver antennas is operable to receive, in a first time interval, a first communication from a base station and a second communication from a subscriber station. The plurality of transmitter antennas is operable transmit a third communication to the base station and the subscriber station in a second time interval. The relay station also includes a network encoder. The network encoder is configured to generate a combined symbol constellation. The combined symbol constellation is generated by combining a first symbol constellation transmitted in said first communication with a second symbol constellation transmitted in said second communication. Further, the third communication comprises said combined symbol constellation. | 10-29-2009 |
| 20090268910 | Apparatus and method for initialization of a scrambling sequence for a downlink reference signal in a wireless network - A method for generating a variable reference signal is provided. The method comprises initializing a scrambling sequence generator at the start of a 10 millisecond (ms) radio frame. The variable reference signal is generated for the radio frame based on different antenna ports, sequence length per antenna port and an initialization seed constructed with a specified equation. Additionally, the variable reference signal is initialized at the start of a 1 ms radio subframe based on a constructed initialization seed. | 10-29-2009 |
| 20090305698 | Downlink control information format for multiple codeword transmission - Systems and methods are disclosed that relate to a wireless communication system. Theses systems and methods include providing information from a base station to a mobile device than enables the mobile device to use at least one DCI format. In some embodiments, this information is provided by receiving data over a wireless communication channel. The transmitted data comprises identification information that identifies the format of the transmitted data being transmitted. These systems and methods may also include identifying the format of the transmitted data and processing the transmitted data using the identified format of the transmitted data. | 12-10-2009 |
| 20100002720 | Effective idle mode for advanced wireless system - A wireless communication network comprising a plurality of paging controllers capable of communication with a plurality of base stations within a coverage area of the network, wherein at least one of the plurality of paging controllers is capable of, if a mobile station within a paging area requests to enter idle mode, assigning a temporary paging identification to the mobile station, and transmitting the temporary paging identification to a base station in communication with the mobile station, wherein the temporary paging identification is used by the base station to determine an index of a paging opportunity or frame in a paging cycle to transmit a paging message for the mobile station. | 01-07-2010 |
| 20100008445 | Method and system for generating reference signals in a wireless communication system - A method of generating reference signals is provided. The method includes precoding a reference signal to generate a plurality of precoded reference signals. For each precoded reference signal, a signal based on the precoded reference signal is transmitted from a corresponding physical antenna. | 01-14-2010 |
| 20100061287 | Efficient coding schemes for retransmissions in multicast transmission - For use in a multicast wireless communication network comprising a plurality of base stations, various methods for encoding retransmissions to a plurality of mobile stations are provided. Each method includes transmitting a plurality of data packets to the plurality of mobile stations. Each method also includes creating at least one redundancy packet by using at least two of the plurality of data packets and binary XOR addition. Each method further includes transmitting at least one redundancy packet to the plurality of mobile stations. | 03-11-2010 |
| 20100091905 | Low overhead MIMO scheme - Systems and methods are disclosed for use in a communications network that includes transmitting a set of known precodes on a plurality of subbands and storing a correlation of transmitted precodes with a time of transmission of the precodes. These systems and methods also include receiving a set of channel quality indicators (CQI) that correspond to the time of transmission of the precodes and determining which precodes may be used in communication based upon the received CQIs and the correlation of the transmitted precodes with the time of transmission of the precodes. | 04-15-2010 |
| 20100100791 | System and method for low complexity raptor codes for multimedia broadcast/multicast service - A system and method for encoding symbols in a wireless communication is provided. The system and method includes a transmitter configured to encode data transmissions. The transmitter includes a raptor encoder configured to perform a coding operation. The raptor encoder generates intermediate symbols without using a half-code such that the intermediate symbols consist of precoded symbols and parity symbols. Thereafter, the intermediate symbols are encoded using a Luby Transform to produce and output encoded symbols. The transmitter further is configured to transmit one or more of the source symbols, parity symbols or encoded symbols. | 04-22-2010 |
| 20100104034 | 8-Transmit antenna reference signal design for downlink communications in a wireless system - Systems and methods are disclosed for mapping reference signals for antenna ports in a plurality of resource blocks among resource blocks in a subframe within an orthogonal frequency division multiplexing (OFDM) communication system. This method includes selecting at least one predetermined resource elements for transmitting in the plurality of resource blocks using a first number of antenna ports. This method also includes selecting a second number of antenna ports and mapping a plurality of reference signals relating to the second number of antenna ports using a second number of OFDM symbols. | 04-29-2010 |
| 20100124186 | Method and apparatus for HARQ operation with network coding - For use in a wireless communication network, methods for encoding information bit streams at a relay station are provided. Each method includes receiving data packets from a base station and a mobile station. Each method also includes decoding the packets and re-encoding the packets. Each method further includes combining the re-encoded packets into another packet using an XOR operation, and transmitting the other packet to the base station and the mobile station. | 05-20-2010 |
| 20100153816 | Methods and apparatus to identify the accessibility of femto-base stations in communication systems - A system and method for identifying the accessibility of femto base stations in a communication system. The system and method includes a plurality of macro base stations, open-access femto base stations and femto base stations with different subscriber groups. At least one of the base stations includes a transmitter configured to apply a base station identifier, such as a closed subscription group identifier, as a cyclic redundancy check (CRC) mask to XOR (exclusive OR) the CRC of a broadcast channel communication or an input to generate a scrambling sequence to the broadcast channel communication. | 06-17-2010 |
| 20100177695 | TECHNIQUE FOR INTERFERENCE MITIGATION USING MOBILE STATION SIGNALING - A Mobile Station (MS) and a Closed Subscriber Group (CSG) Femtocell Base Station (FBS) for Interference Mitigation (IM) in a wireless communication system, and methods for their operation, are provided. A method for operating the MS includes determining if the MS cannot access a first CSG FBS due to interference from a second CSG FBS, the first CSG FBS being a CSG FBS that the MS is authorized to receive service from and the second CSG FBS being a CSG FBS that the MS is not authorized to receive service from, and if it is determined that the MS cannot access the first CSG FBS due to interference received from the second CSG FBS, transmitting an IM-Signal to the second CSG FBS requesting that the second CSG FBS mitigate the interference to the MS. | 07-15-2010 |
| 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 |
| 20100215378 | Apparatus and method for interference mitigation and channel selection for visible light communication - A device and method for device association, interference mitigation and channel selection for use in a visible light communication (VLC) network. The method includes transmitting on every one of a plurality of supported color channels of a first device to estimate an ambient interference on each supported color channel. The method also includes receiving a transmission on at least some of the supported color channels, where the number of receiving color channels is less than or equal to the number of supported color channels of the transmitter. The method further includes calculating a channel quality index for each of the receiving color channels. The method still further includes selecting at least one of the receiving color channels of the first device to be used as a communication channel. The method also includes reporting the at least one communication channel to a second device in the VLC network. In certain embodiments, the method includes establishing guard color channels for each of the supported color channels. | 08-26-2010 |
| 20100246515 | TECHNIQUES FOR PILOT STREAM REMAPPING IN OFDM WIRELESS COMMUNICATION SYSTEM - A method and base station apparatus for transmitting pilot data in a wireless communication system, and a method and mobile station apparatus for receiving pilot data in a wireless communication system are provided. The method for transmitting pilot data in a wireless communication system includes determining a pilot pattern in at least one resource block for each of one or more pilot streams, and transmitting the one or more pilot streams based on the determined respective pilot pattern in the at least one resource block, wherein the at least one resource block comprises a plurality of subcarriers and a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols. | 09-30-2010 |
| 20100272193 | DATA COMMUNICATION USING 2D BAR CODES - A Two-Dimensional (2D) code receiver and transmitter, and methods for their operation in a 2D code communication system, are provided. The method for operating the 2D code receiver includes receiving a sequence of 2D codes from a 2D code transmitter having data encoded therein, wherein the 2D codes of the sequence are received in succession, and decoding the received a sequence of 2D codes into the data. | 10-28-2010 |
| 20100273419 | APPARATUS AND METHOD FOR MAC LOGICAL CHANNEL SELECTION FOR OPERATING PICONETS IN BODY AREA NETWORKS - A portable device capable of controlling a piconet selects a logical channel when forming the piconet. The device includes a controller configured to start a first piconet. The controller couples to at least one secondary device in the first piconet. The portable device also includes a transmitter configured to communicate with the at least one secondary device via a wireless communication channel. The controller is configured to select communication channel resources based at least in part on resources allocated to a second piconet in order to mitigate interference between the piconets. The controller is configured to form the first piconet to operate in either a non-interference mode when the controller is able to establish communications with a second controller in the second piconet or a coexistence interference mitigation mode when the controller is unable to establish communications with the second controller in the second piconet. | 10-28-2010 |
| 20100275083 | CONTROL DESIGN FOR BACKHAUL RELAY TO SUPPORT MULTIPLE HARQ PROCESSES - A wireless communication network includes a base station and a relay station. The relay station is configured to relay communications between the base station and at least one subscriber station. The base station is configured to communicate with the subscriber station via the relay station. The base station further is configured to transmit, in a subframe, a plurality of transport blocks for a plurality of Hybrid Automatic Repeat Request (HARQ) processes to the relay station. Each transport block corresponds to a different HARQ process. | 10-28-2010 |
| 20100302980 | System and method for preserving battery life for a mobile station - A mobile station capable of accessing a wireless communication network having a plurality of base stations is provided. The mobile station is configured to determine if a battery level of the mobile station is below a selected one of a plurality of power level thresholds. The mobile station is also configured to, upon a determination that the battery level is below the selected power level threshold, send a battery report to a first base station of the wireless communication network. The mobile station is further configured to enter a battery power preservation mode. The battery power preservation mode may include an enhanced idle mode, an enhanced sleep mode, or a persistent allocation mode. | 12-02-2010 |
| 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 |
| 20100327066 | NETWORK BASED RELIABLE DECODING OF BAR CODES - An apparatus and method for network-based decoding of barcodes are provided. The method includes scanning, by a mobile device, a barcode; decoding, by the mobile device, data codewords encoded in the barcode; determining, by the mobile device, whether the data codewords contain errors; and when the data codewords contain errors, transmitting barcode information from the mobile device to a barcode server for decoding into the data codewords. | 12-30-2010 |
| 20110064153 | APPARATUS AND METHOD FOR ADAPTIVE CHANNEL QUALITY FEEDBACK IN A MULTICARRIER WIRELESS NETWORK - A subscriber station for use in a wireless network capable of communicating according to a multicarrier protocol. The subscriber station determines a total average signal level across N subbands, where each of subband comprises a plurality of subcarriers. The subscriber station also determines a first average signal level within a first subband. The subscriber station then transmits a channel quality indicator (CQI) feedback message to the wireless network. The CQI feedback message comprises a first data field indicating the total average signal level and a second data field indicating the first average signal level. The first data field may indicate the total average signal level as an absolute value and the second data field may indicate the first average signal level relative to the total average signal level. | 03-17-2011 |
| 20110064405 | FLEXIBLE AND INTEGRATED FRAME STRUCTURE DESIGN FOR SUPPORTING MULTIPLE TOPOLOGIES WITH VISIBLE LIGHT COMMUNICATION - For use in a visible light communication (VLC) network, a system and method for communicating a plurality of medium access control (MAC) frames. The method includes providing a single frame structure to support a plurality of topologies, the plurality of topologies including peer-to-peer, broadcast, star and visibility topologies. The method also includes transmitting a plurality of frames comprising a plurality of frame types, the plurality of frame types comprising data, beacon, command, acknowledgement, and color-visibility-dimming (CVD) frames. | 03-17-2011 |
| 20110064416 | APPARATUS AND METHOD FOR GENERATING HIGH RESOLUTION FRAMES FOR DIMMING AND VISIBILITY SUPPORT IN VISIBLE LIGHT COMMUNICATION - For use in a visible light communication (VLC) network, a method for generating high resolution visibility frames for visibility or dimming support. The method includes determining a required visibility for the high resolution frames. The method also includes generating a pattern that meets the determined required visibility, the pattern having a first quantity of first low resolution frames and a second quantity of second low resolution frames. The method further includes transmitting the pattern to achieve the required high resolution frames. | 03-17-2011 |
| 20110074629 | TECHNIQUES FOR BAR CODE ASSISTED POSITIONING - A method and apparatus for generating a bar code and for using a bar code to assist with positioning are provided. The method for generating a bar code to assist with positioning includes obtaining Global Positioning System (GPS) assistance data, generating a bar code with the GPS assistance data encoded therein, and displaying the bar code. The method for using a bar code to assist with positioning includes scanning a bar code, obtaining GPS assistance data from the scanned bar code, receiving and locking onto one or more GPS signals by using the GPS assistance data, and determining a position using the received one or more GPS signals. | 03-31-2011 |
| 20110074926 | SYSTEM AND METHOD FOR CREATING 3D VIDEO - A system and method for generating 3D video from a plurality of 2D video streams is provided. A video capture device for capturing video to be transformed into 3D video includes a camera module for capturing a two-dimensional (2D) video stream, a location module for determining a location of the video capture device, an orientation module for determining an orientation of the video capture device, and a processing module for associating additional information with the 2D video stream captured by the camera module, the additional information including the orientation of the video capture device and the location of the video capture device. | 03-31-2011 |
| 20110079639 | GEOTAGGING USING BARCODES - A method and apparatus for associating geotag information obtained from a barcode with image or video data is provided. The apparatus includes a camera module for capturing an image or video of an object, a barcode decoding module for receiving barcode data related to the object and for extracting geotag information from the barcode data, and a processor for associating the geotag information with the image or video. | 04-07-2011 |
| 20110082747 | MOBILE SOCIAL NETWORKING ENABLED BY BAR CODES - A method and system for employing barcodes in a social network is disclosed. The method includes extracting location information from a scanned barcode, transmitting the location information to a social network server, and receiving location information of other users in a social network based on the transmitted location information. | 04-07-2011 |
| 20110091220 | APPARATUS AND METHOD FOR CHANNEL AGGREGATION AND GUARD CHANNEL INDICATION FOR VISIBLE LIGHT COMMUNICATION - A method, apparatus, and a non-transitory computer readable storage medium for supporting visible light communication (VLC) exchanges bitmaps for capabilities field exchange in a media access control (MAC) layer during link establishment and association with other VLC-enabled devices. An aggregation bitmap is generated to indicate whether a visible light communication (VLC) transmitter of a first device uses at least one aggregated band that comprises multiple active frequency bands. The aggregation bitmap is transmitted in a capabilities information exchange (CIE) signal to a second device. A guard bitmap that identifies a set of guard frequency bands is also generated and transmitted in the CIE signal. Each guard frequency band indicates leakage transmission from the VLC transmitter. | 04-21-2011 |
| 20110149715 | MIMO CONTROL SIGNALING IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for data transmission in a communication system. The method includes determining, at the transmitter, whether to transmit data signal using a single codeword or two codewords. When it is determined that the single codeword transmission is used, coding, by the transmitter, a control signal by using a first signal format, with the control signal coded by the first signal format carrying information regarding the single codeword. When it is determined that the two codewords transmission is used, coding, by the transmitter, the control signal by using a second signal format, with the control signal coded by the second signal format carrying information regarding both of the two codewords. The method also includes transmitting the data signal and the control signal according to the determined transmission format from the transmitter to the receiver. | 06-23-2011 |
| 20110164881 | OPTICAL CLOCK RATE NEGOTIATION FOR SUPPORTING ASYMMETRIC CLOCK RATES FOR VISIBLE LIGHT COMMUNICATION - A method and apparatus conduct an optical clock rate negotiation to support asymmetric clock rates for visible light communication (VLC) in a VLC device. A first frame that includes a receiver clock rate supported by a first VLC device is transmitted at a predetermined clock rate. A response frame that includes a receiver clock rate supported by a second VLC device is received from the second VLC device. A transmission clock rate of the first VLC device is selected based on the response frame from the second VLC device. Subsequent frames for data communication are transmitted to the second VLC device at the selected transmission clock rate of the first device. Alternatively, when conducting optical clock negotiation in the PHY layer, multiple clock rates are supported within a single frame. | 07-07-2011 |
