Abstract: Intended is to achieve, in a wide range of an SN ratio, throughput on the same order of that attained by a method based on puncturing and improve computational complexity of decoding processing at a high coding rate. In a communication system for transmitting an error correcting code for an error on a communication path from a transmitter to a receiver, the transmitter divides information bits of a code word to be transmitted into a plurality of blocks based on a request for retransmission of an error correcting code from the receiver, generates an error correcting code by compact-coding of one block among the plurality of blocks and transmits the generated error correcting code.

Abstract: A relay station in a wireless communication system is configured to relay communications between the base station and a plurality of subscriber stations. The relay station includes at least one antenna configured to transmit and receive data and control information. The relay station also includes a controller coupled to the antenna. The controller is configured to transmit control information to a subscriber station during a first set of symbols in a relay station to subscriber station (RS-to-SS) subframe. The controller also switches the antenna to a receive mode; and receives control information during a second set of symbols in the RS-to-SS subframe.

Abstract: Embodiments of a system and method for wireless communication are provided. In certain embodiments, a plurality of fragments of a MAC management message is transmitted. Each fragment includes a sequence number indicating an order of the fragments, and at least one of the fragments includes a transaction ID identifying the MAC management message with respect to other messages.

Abstract: A transmitting circuit transmits data to which an error detection code is attached to a receiving circuit via a transmission path. When detecting the error of the data received via the transmission path, a receiving circuit transmits a retransmit request for the data in which the error is detected to the transmitting circuit. The receiving circuit enters a termination unit adjustment period using the error detection of the received data as a trigger and updates the resistance values of a receiving side termination unit installed at the termination of the transmission path to an appropriate value within the termination unit adjustment period.

Abstract: 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.

Abstract: Mechanisms are provided for processing streaming data at high sustained data rates. These mechanisms receive a plurality of data elements over a plurality of non-sequential communication channels and write the plurality of data elements directly to the file system of the data processing system in an unassembled manner. The mechanisms determining whether to perform a data scrubbing operation or not based on history information indicative of whether data elements in the plurality of data elements are being received in a substantially sequential manner. The mechanisms perform a data scrubbing operation, in response to a determination to perform data scrubbing, to identify any missing data elements in the plurality of data elements written to the file system and assemble the plurality of data elements into a plurality of data streams in response to results of the data scrubbing indicating that there are no missing data elements.

Abstract: Methods, systems and computer program product for reducing latency and increasing throughput of data transmissions along a switch network path. Exemplary embodiments include a method in a network accelerator device having a memory buffer, a method including identifying a data transmission, copying data packets from the data transmission into the memory buffer, and in response to at least one of a missing data packet and a corrupt data packet identified during the data transmission, sending a copied data packet corresponding to the at least one of the missing data packet and the corrupt data packet.

Abstract: In at least some embodiments, a method includes receiving a transport block transmission having a plurality of code words and decoding the code words. The method also includes testing each decoded code word to identify each code word as a good code word or a bad code word. During a subsequent retransmission of the transport block, the method includes repeating the decoding and the testing for previously identified bad code words, but not for previously identified good code words.

Abstract: A method for providing improved reverse link transmission timing in an access terminal is provided. The method includes processing automatic repeat request (ARQ) bits from a MAC bit processing unit for a previous sub-frame. The ARQ bits comprise a hybrid ARQ (H-ARQ) bit, a last ARQ (L-ARQ) bit, and a packet ARQ (P-ARQ) bit. The method also includes calculating the maximum allowed reverse rate and grant size for a MAC flow. The method further includes distributing grants to each application in the MAC flow. The method also includes storing a stored read pointer in an application transmit queue, for each application in the MAC flow. The method also includes preparing data for transmission, in response to storing the stored read pointer for each application in the MAC flow, based on the ARQ bits. The method also includes transmitting the data.

Abstract: Provided is a radio communication device for performing radio communication with another radio communication device includes a control unit that controls to prepare for data loss during radio communication of transmission data and a transmission unit that transmits the transmission data by radio according to the control of the control unit. One of the radio communication device and the other radio communication device estimates a distance from the other based on a field intensity of a radio signal which is judged to satisfy a certain requirement regarding noise component among received radio signals received from the other of the radio communication device and the other radio communication device. The control unit performs a control of a content according to the distance estimation result.

Abstract: A fast retransmission method by introducing the internal node under better channel condition to join the work of retransmission after the destination node sends out the packet loss indication for unicast services. Extended to serve multicast services, a system comprising a plurality of nodes utilizes the farthest node in each branch from the source to transmit an acknowledge signal when packet loss occurs. The system then enables the closest node to the acknowledging node to retransmit the requested packet, thereby improving the target packet hit rate and data integrity with less retransmission steps.

Abstract: A method of data transmission using HARQ is provided. The method includes transmitting an uplink data, receiving an ACK/NACK signal for the uplink data, keeping the uplink data in a HARQ buffer when the ACK/NACK signal is an ACK signal, and retransmitting the uplink data when an uplink scheduling information for retransmission of the uplink data is received. In the present invention, a transmission error in an ACK/NACK signal is promptly detected, and thus data can be transmitted at a high speed.

Abstract: Systems and methods are disclosed that include transferring data using a client. The client experiences a disruption event and determines the nature of the disruption event. In addition, these systems and methods may include adjusting for the disruption event. The adjustment of the disruption event is performed automatically using at least one processor in the client and resuming the transmitting of data after adjusting for the disruption event.

Abstract: A method for supporting Hybrid Automatic Repeat Request (HARQ) transmission during component carrier (CC) reallocation. The method includes starting a HARQ process using a first CC, allocating a second CC, mapping the HARQ process from the first CC to the second CC, and transmitting remaining HARQ data associated with the HARQ process using the second CC. Also included is a method for supporting HARQ transmission during CC reallocation comprising starting a HARQ process using a first CC, determining to allocate a second CC, waiting until completion of the HARQ process using the first CC before allocating the second CC, and beginning another HARQ process on the second CC. Included is a method comprising starting a HARQ process using a first CC, allocating a second CC, discontinuing transmission using the first CC before completion of the HARQ process, and restarting new data using the second CC.

Abstract: A method for updating computing device firmware may comprise: (a) receiving a transmission of firmware update data; (b) writing the firmware update data to a firmware update data partition; and (c) writing the firmware update data to an active firmware partition. A system for updating computing device firmware comprising: (a) means for receiving a transmission of firmware update data; (b) means for writing the firmware update data to a firmware update data partition; and (c) means for writing the firmware update data to an active firmware partition.

Abstract: A method of transmitting data over a communication network using negative acknowledgment is presented. In the method, a stream of data packets is transmitted from a first node of the network to a second node of the network. All but at least two of the stream of data packets is successfully received at the second node, wherein the data packets that are not successfully received are not located sequentially within the stream of data packets. A status packet is transmitted from the second node to the first node, wherein the status packet includes an indication of each of the data packets that were not successfully received. In response to receiving the status packet at the first node, the data packets that were not successfully received at the second node are retransmitted from the first node to the second node in response to receiving the status packet.

Abstract: A method for receiver processing in a 3GPP Long Term Evolution (LTE) receiver processing chain in a wireless mobile device is provided. LTE initial sub-frame transmitted from a base station is received on a LTE signalling channel. The sub-frame is received using a basic receiver. An integrity check is performed to determine if the sub-frame was demodulated and decoded correctly by the basic receiver. An advanced receiver is enabled prior to receiving an expected retransmission sub-frame based upon the integrity check failing and a hybrid-acknowledgement request (HARQ) negative acknowledgement (NAK) being sent by the wireless mobile device. The retransmission sub-frame is received using the advanced receiver. The basic receiver is enabled when the integrity check of the retransmission sub-frame passes and a acknowledgement (ACK) is by the wireless mobile device or a new data indicator (NDI) is set in a control channel indicating that the transmission is an initial transmission.

Abstract: A method and apparatus for transmitting a broadcast physical layer packet in a mobile communication system supporting multi-slot transmission and hybrid Automatic Repeat Request (H-ARQ) are provided. The method comprises initially transmitting the broadcast physical layer packet according to a fixed transmission format for at least one first slot interval and retransmitting the broadcast physical layer packet for at least one second slot interval using a variable transmission format different from the transmission format used in the first slot interval.

Abstract: A method and device for performing forward error (FEC) correction avoidance based upon predicted block code reliability in a communications device is provided. An avoidance unit comprising a metric computation unit and a decision unit generates a reliability metric based upon a received code block. The reliability metric is compared to a reliability threshold, and the forward error correction decoder in the communications device is disabled if the metric is below or equal to the threshold.

Abstract: A method for implementation of HARQ between a transmitting node and a receiving node in a communication network is provided. HARQ processes may be selected from a list for instantiation according to a policy that may deviate from strict first-in, first-out processing of packets. The greater flexibility that this affords may lead to improved efficiency in the use of transmission resources.

Abstract: An encoder/decoder system usable to decrease the probability of a failed transmission over a lossy wireless network. In one embodiment, data packets unsuccessfully sent over the wireless network may be retransmitted a particular number of times, depending on how important the data in the lost packet is. In another embodiment, when a number of transmission failures is determined to exceed a predetermined threshold, it may be signaled that multiple reference frames should be used for encoding predictions.

Abstract: In one embodiment, the present invention includes a method for receiving an information packet in a first port from an interconnect while an agent associated with the first port is in an idle low power state, transmitting a first signal from the first port along the interconnect to request re-transmission of the information packet, and sending a second signal from the first port to the agent to cause the agent to enter a fully active power state. Other embodiments are described and claimed.

Abstract: A method of transmitting and receiving Automatic Repeat reQuest (ARQ) feedback information in a wireless communication system is disclosed. The method of transmitting ARQ feedback information in a wireless communication system includes, at a transmitter, transmitting a Protocol Data Unit (PDU) including an extended header including an ARQ feedback Polling Request (APR) field indicating whether or not the transmitter makes a request for ARQ feedback polling, and receiving an Acknowledgement (ACK) from a receiver if the APR field indicates that the transmitter makes the request for ARQ feedback polling to the receiver.

Abstract: A method of performing wireless communications. The method receives at a receiving unit a sequence of data blocks from a transmitting unit. The method also identifies at the receiving unit a first invalid sequential data block in the sequence. The method also communicates from the receiving unit a wireless message to the transmitting unit for provoking the transmitting unit to re-transmit a portion of the sequence of data blocks. The wireless message comprises a first field and a second field. The first field is for identifying the first invalid sequential data block. The second field is for identifying a last data block, from the sequence of data blocks, to which the wireless message applies.

Abstract: The present invention relates to a method and device for enhancing coverage of a power-limited mobile terminal by sending information relating to a single Hybrid Automatic Repeat Request (HARQ) process from the mobile terminal to a base station using several transmission time intervals.

Abstract: Embodiments of the invention provide a system and method of hybrid automatic repeat-request (HARQ) processing. A viterbi decoder is coupled to and follows a descrambler. After the signal has been de-scrambled, it can be stored in a memory in case it needs to be recombined with another packet. This means that the log-likelihood ratios LLRs for each transmitted bit are stored in memory using a finite number of bits (for example, between 4 and 12 bits). If the packet that is currently being processed contains retransmitted information, then the de-scrambled output stored from a previous packet containing the same information can be loaded and combined with the current packet.

Abstract: Provided is a method for retransmitting packet in a Multiple Input Multiple Output (MIMO) system. The method includes: in a receiving block, decoding packets received from a transmitting block and detecting whether an error exists or not in the packets; if the error is detected, transmitting a negative acknowledgement (NACK) signal informing transmission failure of the packets to the transmitting block; calculating channel quality information (CQI) values for transmission-failed packets after performing successive interference cancellation (SIC) with respect to all antenna combinations to retransmit the transmission-failed packets; and selecting an antenna combination having CQI values of the transmission-failed packets which are equal to or greater than respective initial CQI values of the transmission-failed packets among the antenna combinations, and transmitting information of the selected antenna combination to the transmitting block.

Abstract: A method for a receiver to provide a plurality of feedbacks to a transmitter, the plurality of feedbacks for use by the transmitter to determine data retransmission. The method includes: mapping the plurality of feedbacks to a sequence of symbols; and transmitting the sequence of symbols to the transmitter.

Abstract: A communication system employs discontinuous transmission to create gaps in transmission during which a transmitting device (200) can receive. When the transmission of a data block coincides with a transmission gap such that a portion of the data block is not transmitted, the block is retransmitted later. Prior to the retransmission, the data in the data block is reordered. The reordering may be predetermined, or may be selected to ensure that the same portion of data does not coincide with a transmission gap in the retransmission.

Abstract: A method and system for detecting radio link (RL) failures between a wireless transmit/receive unit (WTRU) and a Node-B are disclosed. When signaling radio bearers (SRBs) are supported by high speed uplink packet access (HSUPA), an RL failure is recognized based on detection of improper operation of at least one of an absolute grant channel (AGCH), a relative grant channel (RGCH), a hybrid-automatic repeat request (H-ARQ) information channel (HICH), an enhanced uplink dedicated physical control channel (E-DPCCH) and an enhanced uplink dedicated physical data channel (E-DPDCH). When SRBs are supported by high speed downlink packet access (HSDPA), an RL failure is recognized based on detection of improper operation of at least one of a high speed shared control channel (HS-SCCH), a high speed physical downlink shared channel (HS-PDSCH) and a high speed dedicated physical control channel (HS-DPCCH).

Abstract: A transmission control method for HARQ is provided for improving HARQ performance in a mobile communication system. The transmission control method for Hybrid Automatic Repeat reQuest (HARQ) in a mobile communication system according to the present invention includes receiving an downlink resource assignment message; determining whether configured downlink assignment has been indicated to an HARQ entity since a previously received downlink assignment for a User Equipment's (UE's) Cell-Radio Network Temporary Identifier (C-RNTI) for the same HARQ process; maintaining, if the configured downlink assignment has not been indicated to the HARQ entity, the HARQ process; and processing, if the configured downlink assignment has been indicated to the HARQ entity, the downlink resource assignment message as a resource assignment message for initial transmission.

Abstract: A retransmission control method has a physical control channel transmission step wherein a transmission side apparatus (10) transmits a new data specifier updated upon new packet transmission and a retransmission sequence number indicating whether transmission is the first transmission or retransmission, through a physical control channel related to a physical data channel. The retransmission control method also has a delivery confirmation information transmitting step wherein the receiving side apparatus (10) transmits delivery confirmation information to a packet received through the physical data channel, based on a new data specifier and the retransmission sequence number received through the physical control channel.

Abstract: A method is provided for detecting a hybrid automatic repeat request (HARQ) message. The method comprising setting a round trip time (RTT) based on a time delay associated with acknowledgement (ACK)/negative acknowledgement (NACK) repetitions, and receiving a retransmitted HARQ message when the RTT expires. Also provided is a user equipment (UE) comprising a processor configured to set an RTT based on a time delay associated with ACK/NACK repetitions, and receive a retransmitted HARQ message when the RTT expires.

Abstract: Various example embodiments are disclosed relating to the establishment of reliable multicast/broadcast sessions in a wireless network. According to an example embodiment, an apparatus may be configured to receive, from a wireless recipient station, a request to establish a reliable multicast/broadcast session with the recipient station. The apparatus may be further configured to transmit, to the recipient station, a response to the request to establish the reliable multicast/broadcast session. The response may include one or more retransmission fields describing a retransmission of data for the requested reliable multicast/broadcast session. For example, the request may include a retransmission multicast address to be used for retransmission of data for the multicast/broadcast session.

Abstract: A method is provided for transmitting a Media Access Protocol (MAP) message in a wireless communication system. A base station transmits the MAP message including operation mode information indicating a data burst allocation scheme, to a mobile station. The mobile station identifies a data burst according to the operation mode information included in the MAP message received from the base station.

Abstract: Certain embodiments of the present disclosure propose techniques for improving automatic repeat request (ARQ) feedback messages to reduce unnecessary transmissions by notifying the transmitter of the last acknowledged block in the ARQ feedback message.

Abstract: A communication apparatus which can communicate a data packet, a recovery packet used to recover a data packet that failed to be communicated, and a retransmit packet for the data packet that failed to be communicated, the communication apparatus includes a determining unit configured to determine, when a first packet of a plurality of packets that failed to be communicated is normally communicated, a packet that can be recovered, from among the plurality of the packets that failed to be communicated based on the first packet and the normally communicated recovery packet, and a retransmit determination unit configured to determine not to retransmit at least a part of the plurality of packets that can be recovered, when the first data packet is retransmitted which is determined to recover a plurality of data packets if it is normally communicated.

Abstract: The invention relates to a method in a radio base station and user equipment, and comprises varying the transmitted timings of the HARQ feedback signalling such that only users with orthogonal pre-coding vectors (W) are scheduled simultaneously, to reduce multi-user interference and to ensure that said signalling is received by a transmitter before the start of the next retransmission.

Abstract: Regular data packets are scheduled for transmission from a sender to multiple receivers in a multicast ARQ system. In a joint scheduling and encoding procedure, a composite data packet is formed as a weighted linear combination of regular data packets. The corresponding coding weights are adapted based on feedback information from the receivers about received data packets such the composite packet represents a new linearly independent coding of regular data packets different from any multicast data packet previously received each receiver in a selected set of the receivers during the multicast session. In addition, using a weight vector with at least two different non-zero coding weights adds a further degree of freedom and guarantees the ability to always form a composite data packet that represents a new linearly independent coding for transmission.

Abstract: The present invention relates to a method and apparatus that are capable of executing the error correction decoding process while controlling the increase in the amount of data that is stored in the receiving apparatus. There is provided a transmitting apparatus for transmitting the data to a receiving apparatus to execute the error correction decoding process using, for example, the received data and the re-transmitted data, comprising a transmitting data generating means for generating a first transmitting data by executing the rate matching process to a first part of the error correction coded data and generating a second transmitting data including at least the data not included in the first part by executing the rate matching process on the basis of the error correction coded data, and a transmitting means for executing the transmission of the second transmitting data as the re-transmission after the transmission of the first transmitting data.

Abstract: Disclosed is an interaction method between an automatic repeat request (ARQ) and a hybrid automatic repeat request (HARQ) in a system having a long roundtrip delay. A transmission window for the ARQ is operated using inner feedback information from the HARQ, and a waiting window is operated using ARQ status information.

Abstract: A method of transmitting a sounding reference signal includes generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe, the subframe comprising a plurality of SC-FDMA(single carrier-frequency division multiple access) symbols, wherein the uplink control information is punctured on one SC-FDMA symbol in the subframe, and transmitting simultaneously the uplink control information on the PUCCH and a sounding reference signal on the punctured SC-FDMA symbol. The uplink control information and the sounding reference signal can be simultaneously transmitted without affecting a single carrier characteristic.

Abstract: An automatic repeat request (ARQ) method for use in a communication system is disclosed. The ARQ method constructs a first data block set including a plurality of data blocks using data received from an upper layer, and transmits the data blocks contained in the first data block set to a reception end. If a predetermined time elapses without receiving any acknowledgement (ACK) signal after transmitting a last data block among the plurality of data blocks, the ARQ method transmits at least one data block reconstructed by the data received from the upper layer to the reception end until receiving the acknowledgment (ACK) signal from the reception end.

Abstract: A method for operating synchronous HARQ between a transmitting station and a receiving station in a TDD communication system, includes configuring a plurality of HARQ processes at the transmitting station, and transmitting a data burst in a first subframe to the receiving station via one of the plurality of HARQ processes and using a frame structure including a plurality of regions of subframes. The method also includes receiving a second subframe transmitted from the receiving station and containing a HARQ feedback indicative of whether the data burst was correctly received at the receiving station. Further, the method includes determining whether the HARQ feedback is an acknowledgement (ACK) or a negative acknowledgement (NACK), and retransmitting, via the one of the plurality of HARQ processes, the data burst in a third subframe to the receiving station if it is determined that the HARQ feedback is a NACK.

Abstract: A method, apparatus and computer program product for the express forwarding are presented. A node attempts to transmit a frame designated as a Time Sensitive Quality of Service (TSQ) frame to be express forwarded from a first node to a second node of a plurality of nodes. A collision is detected involving the TSQ frame while attempting to transmit the TSQ frame. A retransmission of the TSQ frame is attempted without waiting a predetermined back off period.

Abstract: A retransmission method based on Low Density Parity Check (LDPC) and devices thereof are provided in embodiment of this present invention, so as to increase the system throughput. In the present invention, when retransmission is needed, the partial bits in the information sequence to be retransmitted are replaced by the prior information that the transmitter and the receiver both have know, with the replaced information sequence is LDPC coded, LDPC check sequence is obtained and is sent to the receiver. After receiving the LDPC check sequence, the receiver decodes the information sequence including the prior information with the LDPC check sequence. If the decoding is successful, after removing the prior information from the decoded information sequence, the receiver refills the decoded bits in a previous received information sequence, and performs decoding again with an LDPC check sequence corresponding to the previous received information sequence and obtains a complete information sequence.

Abstract: A method for efficiently acquiring precoding information and transmitting an uplink signal using the precoding information in a User Equipment (UE) in a Multiple Input Multiple Output (MIMO) scheme is disclosed. The UE receives from a Base Station (BS) a scheduling grant signal including precoding matrix information to be used for an uplink signal transmission from the UE, precodes an uplink signal using the precoding matrix information included in the received scheduling grant signal, and transmits the precoded uplink signal initially to the BS. When retransmitting the uplink signal, if a scheduling grant signal is not received for the retransmission from the BS, the uplink signal is precoded and retransmitted using precoding matrix information included in a latest scheduling grant signal received for transmission of an uplink signal having a Hybrid Automatic Repeat reQuest (HARQ) process number equal to an HARQ process number of the uplink signal to be retransmitted.

Abstract: A communication link comprising: a first transceiver configured to transmit a first set of packets at a predetermined rate with a first error resistance level, store the transmitted data in a buffer, receive a retransmission request, and retransmit the relevant data using one or more packets encoded with a second error resistance level that is higher than the first error resistance level. And a second transceiver configured to receive the first set of packets, detect an erroneous packet, request retransmission of the erroneous packet, and forward the data received in the packets according to its original order approximately after a fixed delay.

Abstract: A wireless transceiver apparatus (201, 203) and a method of operation in an Automatic Repeat Request (ARQ) mode is disclosed. On the transmitter side a packet of data (113) is fragmented into a series of sequential data blocks and each data block is assigned a block sequence number (601). At least a first data block of the series of sequential data blocks is sent to the receiver (603), and also a first block sequence number corresponding to the first data block. An acknowledgment timer is set (605) specifying a time interval in which to receive an acknowledgment message from the remote transceiver. If the acknowledgment timer has timed out, the transmitter side sends a discard message (607) to the receiver specifying at least a second block sequence number corresponding to at least a second data block, and specifying that said second data block is to be discarded.

Abstract: To achieve a greater system throughput and be compatible with the legacy HSDPA by support of 64QAM and the higher modulation in the HARQ bit collection, an equipment and a method are disclosed. After applying this method and equipment, the new HSDPA system can perform better in system throughput and can be upgraded smoothly.