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 signaling such that only users with orthogonal pre-coding vectors (W) are scheduled simultaneously, to reduce multi-user interference and to ensure that said signaling is received by a transmitter before the start of the next retransmission.

Abstract: A method for transmitting data in a wireless communication system provides transmitting a cluster allocation message, which informs at least one user equipment that the user equipment belongs to a cluster, to the at least one user equipment, and receiving a response to the cluster allocation message from user equipments belonging to the cluster. Small envelope correlation coefficient can be obtained without increasing the size of a user equipment.

Abstract: A retransmission side apparatus including a physical control channel receiver unit to receive a physical control channel which includes a new data indicator updated upon transmission of a new packet and a retransmission sequence number indicating whether transmission is first transmission or retransmission. The physical data channel receiver unit is configured to receive a physical data channel associated with the physical control channel. A transmission acknowledgment information transmitter unit transmits transmission acknowledgment information on a packet received through the physical data channel, on the basis of the new data indicator and the retransmission sequence number received through the physical control channel.

Abstract: A method for transmitting data by using hybrid automatic repeat request (HARQ) is provided. A base station allocates a radio resource for a non-acknowledgement (NACK) channel which is used to transmit a NACK signal for multi-user data of a plurality of UEs, transmits the multi-user data, and retransmits the multi-user data when receiving the NACK signal on the NACK channel from at least one UE which receives the multi-user data.

Abstract: An approach is provided for utilizing implicit negative acknowledgement. A determination is made that a user equipment is out of synchronization (e.g., with respect to the uplink). A control signal specifying timing alignment information is generated for transmission to the user equipment. An implicit negative acknowledgement corresponding to retransmission of data is declared if an acknowledgement is not received within a predetermined time interval.

Abstract: A data retransmission method for a radio communication system, in which a plurality of data streams are transmitted from a plurality of transmission systems, the method includes when there is a transmission error in transmission data in any of the plurality of data streams, adaptively selecting beamforming or spatial coding for retransmission of the transmission data; and retransmitting the transmission data with transmission errors by using either of selected beamforming or spatial coding, wherein a criterion for adaptively selecting the beamforming or spatial coding is that by comparing a retransmission period with a prescribed fading speed, the beamforming is selected when the retransmission period is smaller than the prescribed fading speed, while the spatial coding is selected when the retransmission period is smaller than the prescribed fading speed.

Abstract: A method is described for selecting repeaters comprising: transmitting a first signal from a first node to a second node; measuring signal strength of the first signal at the second node; transmitting a second signal from the second node to the first node; measuring signal strength of the second signal at the first node; and selecting the second node as a repeater based on the signal strength of the first signal and/or the signal strength of the second signal. Another embodiment of the method comprises: calculating signal strength of a signal transmitted to each of a plurality of nodes (the signal strength being measured at each node of the plurality); and selecting one or more of the nodes to be a repeater if the signal strength is below a maximum threshold value and above a minimum threshold value.

Abstract: A first transceiver that supports hybrid Automatic Repeat Request (hybrid ARQ) functionality is operated. Initially, it is operated to transmit data blocks having a nominal maximum data block size, M0. In response to detecting that a second transceiver does not have sufficient soft buffer memory space to store data blocks associated with an anticipated number of active hybrid ARQ processes, the transceiver is operated to transmit data blocks having a reduced data block size, M?. The anticipated number of active hybrid ARQ processes can be, for example, higher than a nominal number of active hybrid ARQ processes.

Abstract: Provided are a method and an apparatus for generating an acknowledgement (ACK) frame. The method includes: receiving a data frame; first determining whether sub-frames included in the received data frame are coded in an unequal error protection (UEP) mode; and based on the determination of the first determining, generating the ACK frame including a first ACK field indicating reception of each of the sub-frames or second ACK field indicating reception of each first type bit and second type bit in the sub-frames.

Abstract: A method for performing a Hybrid Automatic Repeat reQuest (HARQ) operation in a wireless mobile communication system that uses Frequency Division Duplex (FDD) or Time Division Duplex (TDD) frames each having a plurality of subframes for communication are provided, in which an HARQ timing including a transmission time of a data burst and a transmission time of an HARQ feedback, for DL HARQ is determined according to data burst assignment information transmitted in a #l DownLink (DL) subframe of a #i frame, and an HARQ operation is performed according to the determined HARQ timing. At least one frame index and at least one subframe index that represent the HARQ timing are determined by using l and i.

Abstract: An apparatus is capable of allocating an ACK/NACK channel in a wireless communication system. The apparatus performs a method for allocating the ACK/NACK channel at a base station that includes generating ACK/NACK channel allocation information of a packet transmitted to a terminal; inserting the ACK/NACK channel allocation information into the packet using a padding area indicative of a size difference of data carried by the packet and an Automatic Repeat Request (ARQ) block; and transmitting the packet comprising the inserted ACK/NACK channel allocation information to a terminal to service.

Abstract: A method is provided for reuse of one of a plurality of hybrid automatic repeat request (HARQ) Process ID. The method includes receiving signaling used to associate at least one of the plurality of HARQ Process IDs with semi-persistent scheduling. The method further includes determining an activation of a semi-persistent resource. The method further includes associating the at least one of the plurality of HARQ Process IDs with the semi-persistent resource. The method further includes receiving a non-semi-persistent data communication utilizing the at least one of a plurality of HARQ Process IDs.

Abstract: A method of communicating between a transmitter and a receiver based on frames is provided. An error detection code is added to each frame to be transmitted by the transmitter. The frames to be transmitted by the transmitter are transmitted and the transmitted frames are received by the receiver. An error detection code is re-computed based on the received frames by the receiver. At least one frame which has been correctly received based on a comparison of the error detection code of each frame with the re-computed error detection code of each received frame is acknowledged. An error indication frame is sent by the receiver when an error is detected based on the comparison result. If a retransmission condition is detected by the transmitter by receiving an error indication frame from the receiver or if no acknowledgement frame was received by the transmitter from the receiver in a predetermined time interval, the currently transmitted frame is aborted and the transmitter inserts a trailer.

Abstract: The present invention, in preferred aspects, provides a communication method using a network coding packet in a wireless network, with reduced occurrence of negative acknowledgements, between a access point and plural mobile terminals.

Abstract: Aspects described a low receiver complexity approach for reliable packet decoding when Hybrid ARQ protocol is employed with persistent assignment and potentially an erasure sequence transmission. Multiple hypotheses packet decoding performance is achieved while mitigating multiple hypotheses receiver complexity. A reference number is utilized to perform hypotheses. The reference number is independent of a start of packet. A sequence of reference numbers can be utilized, which may not necessarily be sequential numbers. The reference numbers are pre-defined.

Abstract: Systems and methods of information transmission are provided. An endpoint receiving packets with non-voice information transmits negative and positive acknowledgements over a dedicated channel in an uplink subframe. When the endpoint receives packets with voice information, the endpoint transmits negative acknowledgements over a shared channel, but does not transmit positive acknowledgements.

Abstract: An apparatus and method for supporting Hybrid Automatic Repeat reQuest (HARQ) in a broadband wireless communication system are provided. A method of performing HARQ by a Mobile Station (MS) in a wireless communication system includes receiving a control message including resource allocation information, decoding the control message, if the decoding is successful, determining whether a previous control message is lost, and if the previous control message is lost, transmitting one of a null signal and a specific indicator through a response channel.

Abstract: Briefly, in accordance with one or more embodiments, a data packet to be transmitted is encoded and one or more subpackets are generated from the encoded data packet. A first bit pattern is applied to a first symbol of the subpackets to provide a constellation, and a different bit pattern is applied to a next adjacent symbol in the constellation for one or more additional symbols. The data packet is then modulated according to the constellation and transmitted one or more times until the data packet is decoded by a receiver or until said transmitting is aborted according to a hybrid automatic repeat request error correction technique.

Abstract: A method is provided for providing a multicast service by a base station (BS) in a wireless communication system. The method includes transmitting an Nth data traffic corresponding to a multicast service to a plurality of mobile stations (MSs) through a multicast channel in an Fth frame; determining whether a Negative Acknowledgement (NACK) message indicating a failure to receive the Nth data traffic is received from at least one MS in an (F+1)th frame; and when the NACK message is received, retransmitting the Nth data traffic to an MS, which transmitted the NACK message, through an other channel different from the multicast channel in an (F+2)th frame.

Abstract: A method for transmitting network data is provided. A sender and receivers can stably transmit and receive data using a packet reception result report request frame and a packet reception result report frame, and data stability at the receivers can be improved through retransmission of network-coded data. In addition, service can be provided at a high transfer rate and with good data stability by adjusting a transfer rate according to a network environment using adaptive transfer rate control.

Abstract: A method and apparatus is disclosed herein for performing wireless communication.

Abstract: A method of and an apparatus to improve stability and efficiency during data transmission performed over a wireless network includes transmitting a first data frame containing a plurality of data units to a receiving device, receiving from the receiving device a receipt of confirmation for each data unit received by the receiving device, and transmitting a second data frame containing at least one of the plurality of data units that have not been transmitted or received, according to the receipt of confirmation for each data unit received by the receiving device.

Abstract: A system for providing an adaptive control mechanism may include a mobile station within a multicast broadcast service group and a base station in communication with the mobile station. The base station may be configured to control provision of data to the mobile station, receive feedback with respect to receipt of at least a portion of the data provided, and determine a configuration of the base station for future transmissions based on the feedback received. The mobile station may be configured to determine a status with respect to receipt of data expected to be received from the base station, generate the feedback indicative of the status determined, and provide for communication of the feedback generated to the base station.

Abstract: A portable device, such as a mobile terminal or user equipment, for encoding uplink acknowledgments to downlink transmissions. The portable device includes a receiver configured to receive a plurality of data blocks, such that each of the data blocks include an associated cyclic redundancy check (CRC), and a processor configured to determine received status for each of the data blocks by checking the CRC of each of the data blocks. The portable device further includes a transmitter for transmitting a response sequence which indicates the received status of all of the data blocks.

Abstract: Circuits and methods to generate a True Random Number Generator (TRNG) with tamper-detection are presented. In one embodiment, the circuit includes two identical TRNG circuits and logic circuitry that combines and correlates the outputs of the two TRNG circuits. The two identical TRNG circuits are located in close proximity to each other inside an Integrated Circuit (IC). The logic circuitry analyzes the outputs of the two TRNG circuits and the historical values of the relation between the outputs of the two TRNG circuits to determine if the outputs are correlated. If the outputs are not correlated, the logic circuitry outputs a true random number sequence based on the combination of the two TRNG circuits. As a result, circuit tampering, such as changes in temperature or voltage supplies, is detected in the IC.

Abstract: The present invention relates to an adaptive automatic repeat-request apparatus and method for an MIMO system including a transmitter and a receiver. The apparatus comprises an adaptive retransmission component located at the transmitter. The adaptive retransmission component uses a special frame structure that divides the transmission data in a frame into several sections according to the number of transmission antennas, and adds an individual error detecting code within each section. The transmission data are sent to the receiver through the several antennas. The receiver responds to the adaptive retransmission component with feedback information of an acknowledgement or negative acknowledgement signal, and detected signal strength of data for each transmission antenna. After receiving the signal strength of transmission data, the retransmission signal vector for error data is determined.

Abstract: A transmission method for transmitting information between a transmission device and a reception device, the method includes determining whether or not an error is detected in information from the transmission device, requesting the transmission device to re-transmit the error-detected information when an error is detected, re-transmitting information corresponding to a re-transmission request as re-transmission information from the transmission device when the re-transmission request is detected, registering the re-transmission information as a test pattern, transmitting the registered test pattern to the reception device, registering the re-transmission data received from the transmission device as a collation pattern, reading out the collation pattern corresponding to the received test pattern, and collating the test pattern and the collation pattern when a test pattern is received from the transmission device, and adjusting and setting a parameter of the reception device on the basis of a pattern collatio

Abstract: A length Nd?2 of a vector is determined, the vector indicating a type of data non-associated control signaling (e.g., CQI+ACK, CQI+NACK, or CQI-only). The length Nd may be sent individually to UEs or broadcast in the cell. The network decodes a received message using a sub-code word from its memory having the determined length Nd. From the sub-code word the network determines what type of data non-associated control signaling is in the received message, and may jointly decode CQI and the ACK/NACK. Varying the length Nd achieves an error performance: longer Nd deteriorates CQI performance and increases ACK/NACK performance. The UE receives the indication of the length Nd, determines a channel quality vector and also a type-vector from its memory having the length Nd, and multiplexes and jointly encodes the vector of length Nd with the channel quality vector.

Abstract: An apparatus and a method for supporting an HARQ scheme in a wireless communication system are provided. In a method for operating a base station, whether a resource used for a system of a different standard and a resource used for one of an HARQ reply and an HARQ retransmission packet by a synchronous HARQ scheme collide with each other is estimated. A collision packet ID is allocated to an HARQ subburst corresponding to one of an HARQ reply and an HARQ retransmission packet estimated to collide, and an offset of the one of the HARQ reply and the HARQ retransmission packet is changed. A MAP message including at least one of the collision packet ID, and changed offset information is generated. The MAP message is transmitted.

Abstract: Information on other code words can be utilized at the time of retransmitting, and transmission characteristics of the case of using multiple code words are improved. In a radio communication apparatus for transmitting data using multiple code words, as response time taken by a transmitting station to receive a response signal (Ack/Nack signal) after the data is transmitted from the transmitting station (BS) to a receiving station (UE), a cycle of second response time (RTT2) corresponding to a low-order code word is longer than a cycle of first response time (RTT1) corresponding to a high-order code word. In the receiving station, received data of the low-order code word is decoded using at least one of retransmission data and the first received data of the high-order code word and response signals are respectively generated according to a decoding result of each of the code words and notification of the response signal is provided.

Abstract: An enhanced semi-explicit solution for HARQ feedback channel indexing in wireless communication systems is disclosed. The HARQ feedback channel indexing method may be applied to the HARQ feedback channel transmitted in the downlink, as well as the HARQ feedback channel transmitted in the uplink.

Abstract: An apparatus and method for controlling an Automatic Repeat reQuest (ARQ) reset in a broadband wireless communication system are provided. The apparatus includes an Orthogonal Frequency Division Multiplexing (OFDM) sender for receiving one or more data from a transmitter, a controller for determining whether the data is received in order and a memory for constituting selective reset information according to a result of the determining. The method includes receiving one or more data from a transmitter, determining whether the data is received in order and constituting selective reset information according to a result of the checking. Hence, the performance degradation can be prevented by shortening the TCP timeout and the break time (the time of no traffic transmission).

Abstract: Within a serial buffer, request packets are written to available memory blocks of a memory buffer, which are identified by a free buffer pointer list. When a request packet is written to a memory block, the memory block is removed from the free buffer pointer list, and added to a used buffer pointer list. Memory blocks in the used buffer pointer list are read, thereby transmitting the associated request packets from the serial buffer. When a request packet is read from a memory block, the memory block is removed from the used buffer pointer list and added to a request buffer pointer list. If a corresponding response packet is received within a timeout period, the memory block is transferred from the request buffer pointer list to the free buffer pointer list. Otherwise, the memory block is transferred from the request buffer pointer list to the used buffer pointer list.

Abstract: Disclosed is the radio (wireless) communication system providing a radio communication service and the terminal, and more particularly, to a method of an uplink HARQ (Hybrid Automatic Repeat reQuest) operation at an expiry of time alignment timer in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from the Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system.

Abstract: A method and a device for reporting the number of correctly decoded transport blocks in a wireless system. The maximum number of correctly decoded transport blocks within a reporting period is determined. Then the actual number of correctly decoded transport blocks is determined and cultivated into an indication thereof on the basis of the maximum number. The indication is sent to a network element capable of decoding it for analysis.

Abstract: An apparatus and method for generating a Media Access Control (MAC) Protocol Data Unit (MPDU) in a wireless communication system are provided. The method includes reconstructing at least one MAC Service Data Unit (MSDU) according to scheduling information of the MAC layer and generating at least one MPDU data portion, adding control information to each MPDU data portion and generating at least one MPDU payload, adding a General MAC Header (GMH) to each MPDU payload and generating at least one MPDU, and transmitting the MPDU to a receive end. The control information includes at least one piece of MSDU information constituting each MPDU data portion. The GMH includes length information on the MPDU and Connection IDentifier (CID) information.

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 in a selected set of the receivers during the multicast session. A weight vector with at least two different non-zero coding weights adds a further degree of freedom and guarantees the ability to form a composite data packet that represents a new linearly independent coding for transmission.

Abstract: Disclosed is a radio (wireless) communication system providing a radio communication service and a terminal, and more particularly, to a method for retransmitting protocol data unit upon receiving a HARQ delivery failure notification with respect to a particular RLC data PDU by a RLC, only if the RLC did not receive a positive response (i.e., ACK) with respect to the particular RLC data PDU from a previous RLC status PDU within an Evolved Universal Mobile Telecommunications System (E-UMTS) that has evolved from a Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system.

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 number of invalid sequential data blocks in the sequence and a second number of valid sequential data blocks in the sequence. The method also communicates from the receiving unit a wireless message to the transmitting unit. The wireless message comprises a first field that specifies the first number and a second field that specifies the second number—the encoding of the first field is operable to specify a different maximum than an encoding of the second field.

Abstract: 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.

Abstract: The present invention relates to a resource allocation device for minimizing delay of an uplink retransmission resource allocation process in a wireless communication system having a high data rate, and a method thereof. In the method, user data are received and an ACK/NACK state of the received data is determined, and when the NACK state of the received data is determined, retransmission resource allocation is requested, retransmission resources are allocated, and retransmission resource allocation information is generated to be transmitted.

Abstract: A resource allocation method for a HARQ is disclosed. This resource allocation method includes, transmitting an MAP message having specific information indicating whether or not a differential allocation is supported, storing MAP information contained in the MAP message during a predetermined frame, and upon receiving an NACK message during the predetermined frame, transmitting sub-burst information having differential allocation information related to sub-bursts to be retransmitted. If there are a large amount of HARQ traffic, each embodiment of the present invention transmits only differential information on the basis of MAP information of the initial MAP message when HARQ sub-bursts is retransmitted.

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: Different transmissions based on different content blocks which were segmented from the same digital content according to different segmentation schemes, where each of the content blocks has any substring in common with at least one of the other content blocks, are received by a receiving radio communication station, for example a mobile telephone or a mobile network base station. Certain encoded received bits derived from different ones of the transmissions are combined into combined bits. Other encoded received bits derived from one or more of the different transmissions are provided together with the combined bits to a decoder.

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: A signal encoding method and device and a method for encoding a joint feedback signal are provided. The signal encoding method includes the following steps. When two carriers are configured with multiple-input and multiple-output (MIMO), Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) signals of the two carriers are combined into a joint feedback signal. The joint feedback signal is mapped into a codeword according to a predetermined mapping relationship between signals and codewords. Therefore, through the method for combining and encoding feedback signals of two carriers for transmission on a code channel in a dual cell (DC)-MIMO mode, bit error ratio (BER) and detection error cost are decreased, power overhead is saved, and a cubic metric (CM) value of the system is not affected, thereby enhancing the performance of the system.

Abstract: A wireless communication method and apparatus for detecting and decoding enhanced dedicated channel (E-DCH) hybrid automatic repeat request (H-ARQ) indicator channel (E-HICH) transmissions are disclosed. A wireless transmit/receive unit (WTRU) receives E-HICH transmissions and detects an H-ARQ indicator transmitted via the E-HICH by performing a binary hypothesis test. The WTRU then generates an acknowledgement (ACK) message or a non-acknowledgement (NACK) message based on the detected H-ARQ indicator. A reliability test may be further performed to improve performance, whereby the binary hypothesis test may be performed only if the reliability test is passed.

Abstract: In the sending of data in a network from a sending node to a receiving node via a relay node, the receiving node sends a notification arranged to notify both the sending node and receiving node of receipt of data at the receiving node. Notifications acknowledge that the data has been correctly received over each individual stage of transmission, and further acknowledge to the sending node that data has been correctly transmitted over the whole transmission path and received at the receiving node. The burden on the network of sending acknowledgments is reduced while notifications of data transmission over single stages and over the whole transmission path are provided.

Abstract: Data errors are sufficiently corrected and desired transmission quality is obtained even when the time variation of fading is large in a multicarrier transmission scheme communication system to which HARQ is applied. A transmission apparatus 100 is applied to a communication system in which the transmission apparatus and a reception apparatus perform automatic repeat request control therebetween, and has a subcarrier spacing setting section 111 that sets the subcarrier spacing used in transmitting a retransmission signal to be larger than the subcarrier spacing used in transmitting a first transmission signal, an IFFT section 112 that performs IFFT (Inverse Fast Fourier Transform) on an input signal based on the subcarrier spacing set in the subcarrier spacing setting section 111, and a transmission section 102 that transmits the first transmission signal and at least one retransmission signal.

Abstract: Transmission of excess segments to a network can be effectively inhibited. A received byte calculation section 14 calculates, at a sending side, the number of bytes of segments which arrive at a receiving side within a period of a minimum value of RTT measured by a minimum time measurement section 13, a target calculation section 15 calculates a target used for controlling segment transmission based on the number of bytes of the received segments calculated by the received byte calculation section 14, and a send segment control section 16 which controls segment transmission based on the target calculated by the target calculation section 15.