921results about "Transmission link error control system" patented technology

A method of wireless communication performed in a shared frequency band at a user equipment (UE) comprises: receiving a sidelink (SL) communication; selecting a channel access configuration for a physical sidelink feedback channel (PSFCH) occasion in a shared frequency band; and transmitting, based on the channel access configuration and the SL communication, a PSFCH communication in the PSFCH occasion in the shared frequency band.

A method can include receiving, by a wireless device, radio resource control (RRC) messages that include parameters of a multicast and broadcast service (MBS). The parameters can include a discontinuous reception (DRX) hybrid automatic repeat request (HARQ) round trip time (RTT) timer; a DRX retransmission timer; and a feedback indicator indicating whether HARQ feedback is enabled. The method can also include receiving a group common downlink control information (DCI) scheduling a transport block (TB) of the MBS. The method can further include, in response to the feedback indicator indicating that HARQ feedback is enabled: transmitting a HARQ feedback with a negative value based on the TB being unsuccessfully decoded; and starting the DRX HARQ RTT timer after transmitting the HARQ feedback. The method can additionally include starting the DRX retransmission timer based on an expiry of the DRX HARQ RTT timer.

Embodiments of the present disclosure disclose a multicast communication method and an apparatus therefor, which can be applied to systems such as the Internet of vehicles, V2X and V2V. The method comprises: a first terminal determines a hybrid automatic repeat request (HARQ) feedback mode selected by the first terminal; according to the HARQ feedback mode selected by the first terminal, the first terminal determines whether to retransmit multicast data. By implementing the embodiments of the present disclosure, multicast communication in a Sidelink-U scene can be realized, the integrity of multicast data in the Sidelink-U scene is ensured, and the problem of packet loss of a terminal in a group is solved.

A method for beam management in sidelink communication by a user equipment (UE) includes using a set of transmit beams to perform a sidelink transmission to another UE or a group of another UEs during a beam management process, receiving, from the another UE or the group of another UEs, a sidelink hybrid automatic repeat request (SL-HARQ) report, and selecting and / or determining a subset of one or more transmit beams based on the SL-HARQ report.

Systems and methods are described herein for handling connection rejects via a wireless transmit / receive unit (WTRU)-to-WTRU (U2U) relay associated with backoff times on behalf of a source end WTRU. A relay WTRU may retry to establish connection with a target WTRU on behalf of a source WTRU, for example, based on receiving a rejection (e.g., with a backoff value) from the target WTRU. The source WTRU may associate the reject message to the target WTRU, and the relay WTRU may be available to reach other target WTRUs. The relay WTRU may send a reject message to other source WTRUs (e.g., if the back off duration is active, running) for the same target WTRU.

Provided are a method for a first device carrying out wireless communication, and a device supporting same. The method may comprise the steps of: acquiring information related to a plurality of physical sidelink feedback channel (PSFCH) occasions; acquiring information related to a slot offset between PSFCH-physical uplink control channel (PUCCH); transmitting, to a second device via a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling second SCI and a physical sidelink shared channel (PSSCH); transmitting the second SCI and data to the second device via the PSSCH; generating HARQ feedback information for the plurality of PSFCH occasions; and reporting the HARQ feedback information to a base station on the basis of a PUCCH resource.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting (Tx) user equipment (UE) may perform, to a receiving (Rx) UE, a first sidelink transmission in an on duration of a sidelink discontinuous reception (DRX) cycle associated with a sidelink DRX configuration. The Tx may activate a sidelink DRX timer based at least in part on the sidelink DRX configuration, wherein the sidelink DRX configuration is associated with a destination identifier (ID) and one or more source IDs are associated with the destination ID, and wherein the sidelink DRX timer is operated per a pair of source ID and destination ID. Numerous other aspects are described.

A communication device (200A) includes a communication unit (21) and a control unit (25). The communication unit (21) performs wireless communication with a first communication device (100) that supports in-band full-duplex (IBFD) communication that transmits and receives wireless signals using at least a part of resources of the same frequency and the same time. The control unit (25) measures channel quality with a first communication device (100) at each level of quality of service requested for the wireless communication with the first communication device (100) on the basis of interference from a second communication device (200B) that performs wireless communication with the first communication device (100).

A transmission method intended for an OMAMRC telecommunication system with M sources (s1, . . . , sM), possibly L relays and one destination, M≥2, L≥0. In such a solution, when a source could not be decoded by the destination, the latter organises a retransmission by taking into account the characteristics of a MIMO transmission channel established between, on the one hand, at least two nodes that decoded the source and, on the other hand, at least two antennas in reception of the destination in the form of a precoding coefficient. Thus, the method therefore makes it possible to improve the decoding performance of a source si, in a context where the destination is equipped with a plurality of antennas in reception.

Methods and apparatuses are provided in a wireless communication system. Configuration information regarding a hybrid automatic repeat and request-acknowledgement (HARQ-ACK) retransmission is received from a base station (BS) via higher layer signaling. Downlink control information (DCI) is received from the BS. An offset for the HARQ-ACK retransmission is identified as a value of a modulation and coding scheme (MCS) field included in the DCI, based on the configuration information. The HARQ-ACK retransmission is performed on a slot identified based on the offset.

Disclosed are a method and an apparatus for transmitting and receiving HARQ responses in a communication system supporting sidelink communication. The method of operating a transmitting terminal comprises the steps of: receiving, from a base station, a higher layer signaling message including PSFCH configuration information; transmitting, to a plurality of receiving terminals, SCI including resource allocation information of data and configuration information for HARQ feedback for the data; transmitting the data to the plurality of receiving terminals in a PSSCH indicated by the SCI; and performing a monitoring operation to receive, from the plurality of receiving terminals, sequences mapped to HARQ responses for the data in a PSFCH resource region indicated by the PSFCH configuration information. Therefore, the performance of a communication system can be improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information indicating that network coding is enabled for initial transmissions associated with a multicast / broadcast service (MBS) and indicating that network coding is enabled for retransmissions associated with the MBS. The UE may receive, via a multicast traffic channel or a dedicated traffic channel, an initial transmission associated with the MBS, wherein the initial transmission is associated with a first set of encoded packets. The UE may transmit a radio link control (RLC) status feedback message associated with the initial transmission. The UE may receive, via the multicast traffic channel or the dedicated traffic channel, a retransmission associated with the initial transmission, wherein the retransmission is associated with a second set of encoded packets. Numerous other aspects are described.

An embodiment proposes a method for performing wireless communication by a first device. The method may comprise the steps of: selecting a first resource within a first selection window on the basis of first sensing; generating a first medium access control (MAC) protocol data unit (PDU) on the basis of at least one logical channel (LCH) in which hybrid automatic repeat request (HARQ) feedback is enabled; transmitting, to a second device, first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH), through a first physical sidelink control channel (PSCCH), on the basis of the first resource; and transmitting, to the second device, second SCI and the first MAC PDU, through the first PSSCH, on the basis of the first resource. For example, random selection of the first resource may not be allowed on the basis of the at least one LCH in which the HARQ feedback is enabled.

The disclosure relates to a communication technique for fusing a 5G communication system with IoT technology to support higher data rate after the 4G system and a system thereof. The disclosure may be applied to an intelligent service (e.g., smart home, smart building, smart city, smart or connected car, healthcare, digital education, retail, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure discloses a method for allowing a UE to normally receive a MBS service in various scenarios.

An indication method is performed by a first user equipment (UE), and includes: receiving at least one sidelink (SL) transmission resource for SL transmission on an unlicensed spectrum scheduled by a network device; performing listen-before-talk (LBT) on the SL transmission resource; and sending indication information to the network device based on a performing result of the LBT, wherein the indication information is configured to indicate whether the first UE performs the SL transmission on the SL transmission resource.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE via a sidelink interface, a triggering signal associated with triggering hybrid automatic repeat request (HARQ) feedback for a sidelink. The UE may transmit, to the second UE and based at least in part on the triggering signal, HARQ feedback associated with the second UE. Numerous other aspects are provided.

Proposed is a method for a first device to perform wireless communication according to an embodiment. The method may comprise the steps of: acquiring an SL DRX configuration including information related to a sidelink discontinuous reception (SL DRX) cycle and information related to an active time; transmitting first sidelink control information (SCI) to a second device through a first physical sidelink control channel (PSCCH), wherein the first sidelink control information (SCI) is for scheduling a first physical sidelink control channel (PSSCH); transmitting second SCI and a first medium access control (MAC) protocol data unit (PDU) to the second device through the first PSSCH; determining a first physical sidelink feedback channel (PSFCH) resource in the first PSFCH slot on the basis of an index of a slot related to the first PSSCH and an index of a subchannel; and receiving a first hybrid automatic repeat request (HARQ) feedback for the first MAC PDU, the first HARQ feedback being received from the second device on the basis of the first PSFCH resource. For example, the first PSFCH slot may be included in an inactive time at the time of transmission of the first MAC PDU. For example, the first PSFCH slot may be included in an active time at the time of reception of the first HARQ feedback.

A first station (STA) receives a first portion of a first physical layer protocol data unit (PPDU) via a first link from a second STA. Based on the first portion of the first PPDU indicating low latency relaying and comprising an address of the first STA as a first receiver address of the first PPDU, the first STA decodes and forwards a second portion of the first PPDU for transmission in a second PPDU via a second link to a third STA.

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for priority and feedback resources for rate-split transmissions. In rate-splitting approaches, messages destined for various user equipment (UEs) may be split into a common portion and a private portion. The common portion of messages may be transmitted to multiple UEs, and each of the private portions may be transmitted to individual UEs, so that each UE may receive their entire respective messages. The network may assign different feedback resources for the common portion and the private portion of a rate-split transmission. The feedback resource for the common portion may be prior to the feedback resource for the private portion.

Methods and apparatus are provided for wireless communication performed by a network-controlled repeater (NCR) configured to forward downlink (DL) channels or signals from a base station to a user equipment (UE). The NCR determines a duration for which hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback is configured. The NCR determines a number of measurements of the DL channels or signals for which a single HARQ-ACK bit is reported. The NCR determines, based on the number of measurements and a comparison with a success threshold for each of the measurements, an acknowledgement (ACK) or negative acknowledgement (NACK) for each configured HARQ-ACK bit in a first sequence of HARQ-ACK bits. The NCR constructs a dynamic HARQ-ACK codebook to send to the base station. The dynamic HARQ-ACK codebook includes at least the first sequence of HARQ-ACK bits.

A data transmission (including receiving and sending) method is disclosed. According to the data transmission method, a terminal device receives downlink control information (DCI), where cyclic redundancy check (CRC) of the DCI is scrambled by using a first RNTI, the DCI is used to schedule a first downlink data channel, and the first downlink data channel is scrambled by using a second RNTI; and the terminal device receives the first downlink data channel based on the DCI. The DCI includes a DAI domain and / or an FDRA domain. The DAI domain indicates a count of first HARQ-ACK information in a first HARQ-ACK codebook, and the first HARQ-ACK codebook corresponds to the first RNTI. The FDRA domain indicates, within a frequency domain range of a public frequency resource, a scheduled frequency domain resource on the first downlink data channel.

A method and an apparatus for transmission of an Ethernet physical layer signal, a device, and a computer-readable storage medium are disclosed. The method includes: obtaining first status information and / or control information, where the first status information indicates that a received first data stream is degraded, and the control information indicates bypass information; and sending the first status information and / or the control information. According to the method, Ethernet physical layer information can be effectively transferred.

The present invention provides a method and device for implementing a transceiver in a 5G or 6G communication system to support higher data transmission rates beyond 4G communication systems such as LTE. [Solution] A method performed by a transmitting device in a wireless communication system of the present invention includes a step of transmitting, via a physical downlink control channel (PDCCH), first control information for scheduling a group common-physical downlink shared channel (GC-PDSCH) over which multicast data is transmitted, the first control information including information related to hybrid automatic repeat request (HARQ) feedback of multicast data, and a step of transmitting, via the PDCCH, second control information for scheduling a physical downlink shared channel (PDSCH) over which the unicast data is transmitted, the second control information including information related to HARQ feedback of unicast data.

Embodiments of the present disclosure relate to hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback transmission. According to some embodiments of the disclosure, a method may include: receiving, from a base station (BS), configuration information for a sub-group of UEs, wherein the sub-group of UEs comprises the UE; receiving, from the BS, a downlink control information (DCI) format for scheduling a physical downlink shared channel (PDSCH), wherein the PDSCH is received by a plurality of UEs which are divided into a plurality of sub-groups of UEs comprising the sub-group of UEs; determining a time domain resource for transmitting HARQ-ACK feedback for the PDSCH; and transmitting, to the BS, the HARQ-ACK feedback for the PDSCH on the time domain resource.

Disclosed are a method and device for sidelink communication in an unlicensed band. The method of a first terminal comprises the steps of: receiving SCI from a second terminal; receiving data scheduled by the SCI from the second terminal; generating an HARQ-ACK for the data; and conducting a first LBT operation for transmission of the HARQ-ACK in a first PSFCH occasion among N PSFCH occasions set in the first terminal.

A retry technique reduces or eliminates redundant transmit streams and redundant retransmissions when multiple devices are listening to the same audio stream. The retry techniques reduce power consumption and reduce airtime usage. The retry technique includes communicating data using a hybrid isochronous group including a plurality of broadcast isochronous streams from a source device to a plurality of sink devices. The hybrid isochronous group includes, for each broadcast isochronous stream, a group of connected isochronous streams including a connected isochronous stream to the source device from each of the plurality of sink devices. The broadcast isochronous streams communicate the data and the connected isochronous streams communicate acknowledgements of receiving the data.

Certain aspects of the present disclosure provide techniques for providing feedback from a backscatter device, such as an ambient internet of things (IoT) device, based on a forward link transmission. In one example, a method of wireless communications by an ambient internet of things (IoT) apparatus, includes receiving a multicast forward link communication comprising one or more cyclic redundancy check (CRC) bits associated with a transport block portion of the multicast forward link communication; and performing one of sending a negative acknowledgement, or not sending an acknowledgement, via a backward link in response to determining whether each of one or more check values determined based on the multicast forward link communication matches a corresponding CRC bit of the one or more CRC bits.