1500results about "Transmission link error control system" patented technology

Provided are a method for performing wireless communication by a first device and an apparatus supporting same. The method may comprise: obtaining information related to at least one resource block (RB) set for physical sidelink feedback channel (PSFCH) transmission; receiving, from a second device, a physical sidelink shared channel (PSSCH); determining a number of PSFCH resources related to the PSSCH; determining an index of an interlaced PSFCH resource among the PSFCH resources, in response to the PSSCH; and performing the PSFCH transmission based on the interlaced PSFCH resource.

A method for performing wireless communication by a first device, and an apparatus supporting same are provided. The method may comprise the steps of: receiving information related to channel occupancy time (COT) from a second device; receiving a first physical sidelink shared channel (PSSCH) from the second device; determining a first PSFCH resource for first physical sidelink feedback channel (PSFCH) transmission related to the first PSSCH; and performing second-type channel access for the first PSFCH transmission within the COT.

A method of channel access adjustment for sidelink (SL) communication in a shared / unlicensed spectrum by a user equipment (UE) includes transmitting, by the UE, at least one physical sidelink shared channel (PSSCH) transmission in a reference duration for a latest channel occupancy initiated using Type 1 channel access procedures and performing, by the UE, a contention window adjustment operation based on at least one hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback corresponding to the at least one PSSCH transmission.

Disclosed in the present invention are a method for transmitting / receiving downlink data in a wireless communication system, and a device therefor. Specifically, a method of receiving downlink data by user equipment (UE) in a wireless communication system comprises the steps of: receiving configuration information; receiving downlink control information (DCI), the DCI comprising a transmission configuration indication (TCI) field, and multiple TCI states being indicated on the basis of the TCI field; and receiving multiple transmission occasions of an identical transport block on the basis of the DCI. The multiple transmission occasions are received through a time-domain resource on the basis of time division multiplexing (TDM), and the number of the multiple transmission occasions is determined on the basis of the number of the multiple TCI states.

Methods and systems for physical layer network coding based on two-dimensional (2D) joint coding are described. In some methods, first and second packets are obtained. A set of one or more cross-packet check blocks is generated, where each cross-packet check block is generated based on a set of cross-packet bits including at least one bit from each of the first and second packets. At least one cross-packet check block is transmitted to a first communication node.

Various embodiments of the present disclosure relate to a next-generation wireless communication system for supporting high data transfer rates beyond the 4th generation (4G) wireless communication system. According to the various embodiments, a method of transmitting and receiving signals in a wireless communication system and apparatus for supporting the same may be provided.

The disclosure relates to apparatus and method for supporting Hybrid Automatic Repeat request (HARQ)-Acknowledgement (ACK) feedback for multicast service. In some aspects, a user equipment (UE) device may comprise at least one antenna; at least one radio, coupled to the at least one antenna and configured to perform wireless communication using at least one radio access technology; and one or more processors coupled to the at least one radio, wherein the one or more processors are configured to cause the UE device to: receive, from a base station, a Radio Resource Control (RRC) signaling which indicates that a semi-static codebook is configured for a Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) feedback for both multicast and unicast and that a HARQ-ACK feedback for multicast is disabled; and generate a HARQ-ACK feedback report which excludes a HARQ-ACK bit for the multicast by using a time domain resource assignment (TDRA) for the unicast to configure the semi-static codebook.

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.

Disclosed are a communication technique and a system thereof for fusing a 5G communication system with IoT technology for supporting a higher data transmission than that of a 4G system. The present disclosure may be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security, and safety related services, etc.) on the basis of 5G communication technology and IoT-related technology. The invention of the present disclosure provides an uplink transmission method and apparatus for a plurality of TRPs.

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.

A wireless device receives one or more radio resource control (RRC) messages comprising configuration parameters of a multicast and broadcast service (MBS). The configuration parameters comprise parameters of a semi-persistent scheduling (SPS) identified by a SPS configuration index; and at least one indicator, for the SPS, indicating a feedback type from a plurality of feedback types. The wireless device receives, via common frequency resources, a downlink control information (DCI) indicating an activation of the SPS of the MBS. The wireless device receives, via downlink assignments of the SPS, transport blocks (TBs) of the MBS. The wireless device determines whether the TBs are decoded successfully or unsuccessfully; and whether to transmit feedback, for the TBs, based on the feedback type indicated by the at least one indicator. In response to the determining, the wireless device transmits the feedback for the TBs based on the feedback type.

Methods and systems are disclosed for enhancements to multicast beamforming to support PTM multicast service, concurrent multicast and unicast service, MBS, or group side-link service at the physical layer. A base station or multicast UEs of a wireless communication network may enhance reporting of the channel state information of a link between the base station and the UE and adaptation of the link for multicast beamforming. Enhancements to multicast beamforming may include techniques such as CQI table optimization and SSB-based early CQI reporting, consideration of UE preferences such as the preferred number of retransmissions and frequency-hopping preference for retransmission when designing a time-domain or frequency-domain retransmission scheme common to the multicast UEs, and multi-layer MIMO beamforming for 2-layer multicast transmissions over the horizontal and vertical polarizations and for concurrent multicast and unicast transmissions. The enhancements improve multicast service performance and efficiently allow a UE to gain access to multicast service.

The present invention relates to a wireless communication system and, specifically, to a method and a wireless device for: transmitting at least one PSSCH within a COT, the at least one PSSCH including at least one first PSSCH having HARQ-ACK feedback enabled; adjusting a CWS on the basis of HARQ-ACK feedback for the at least one PSSCH in a reference duration; and conducting an SL channel access procedure on the basis of the adjusted CWS.

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.

The present disclosure relates to methods and apparatuses for transmitting and / or receiving data. For example a data transmitting includes obtaining first data addressed to a first wireless device and second data addressed to a second wireless device different from the first wireless device; generating a first redundancy version from the first data and a second redundancy version from the second data; obtaining common data as a separable combination of the first redundancy version and the second redundancy version; and obtaining encoded first data by forward error correction code (FEC) encoding of the first data and obtaining encoded second data by FEC encoding of the second data. The transmitter then transmits a signal carrying the encoded first data, the encoded second data, and the common data at the same time on different beams. Correspondingly, a user parses the common and the private data and combines them.

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.

The present disclosure is related to techniques for Hybrid Automatic Repeat Request (HARQ) feedback control which can be used with a multicast service or any group-based service. In an embodiment, a UE is configured to decode a first DCI and a second DCI by using a first group identification (ID) to obtain a first downlink assignment index (DAI) and a second DAI respectively; decode a first PDSCH reception scheduled by the first DCI to generate a first HARQ bit, and decode a second PDSCH reception scheduled by the second DCI to generate a second HARQ bit; and arrange the first and the second HARQ bits for the first and the second PDSCH receptions in a first HARQ codebook, wherein a first position of the first HARQ bit in the first HARQ codebook is indicated by a first counter DAI (C-DAI) included in the first DAI, and a second position of the second HARQ bit in the first HARQ codebook is indicated by a second C-DAI included in the second DAI.

A method by which a first device performs wireless communication and an apparatus supporting the method are provided. The method may comprise the steps of: acquiring information related to a resource block (RB) set in which a channel access procedure is performed in a shared spectrum, acquiring a threshold for adjusting a transmission parameter; performing channel sensing on the RB set; determining the transmission parameter on the basis of a result of the channel sensing for the RB set and the threshold; and performing sidelink (SL) communication with a second device on the basis of the transmission parameter.

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.

The present disclosure provides a method performed by a user equipment (UE), the method including determining formats of all downlink control information (DCI) to be received and DCI format payload sizes corresponding to the formats of the DCI; performing an alignment operation on one or more of the DCI format payload sizes according to a protocol or higher-layer signaling; and receiving all DCI, wherein, the formats of all DCI to be received include a DCI format for a multicast physical downlink shared channel (PDSCH).

Embodiments of the present application relate to a method, terminal device, and network device for transmitting sidelink data. The method includes that: a first terminal device receives sidelink transmission resource indication information and first uplink transmission resource indication information configured by a network device, where the sidelink transmission resource indication information is used for indicating a sidelink transmission resource, and the first uplink transmission resource indication information is used for indicating a first uplink transmission resource; the first terminal device transmits sidelink data to at least one second terminal device on the sidelink transmission resource; and the first terminal device transmits the first feedback information to the network device, where the first feedback information is used for indicating whether the sidelink data has been received correctly.

An operation method of a terminal in a communication system may comprise: receiving, from a base station, an SPS PDSCH; receiving a first PDSCH from the base station; generating SPS HARQ ACK / NACK information for the SPS PDSCH; generating first HARQ ACK / NACK information for the first PDSCH; and when the SPS HARQ-ACK / NACK information is not transmitted in a first slot and transmission of the SPS HARQ-ACK / NACK information is deferred, transmitting both the SPS HARQ ACK / NACK information and the first HARQ ACK / NACK information in a second slot after the first slot.

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).

According to an embodiment of the present disclosure, a method performed by a user equipment (UE) in a wireless communication system includes receiving, from a base station (BS), multicast broadcast service (MBS) configuration information including information about at least one hybrid automatic repeat request (HARQ) process for an MBS, receiving, from the BS, MBS data based on the MBS configuration information, and processing the MBS data based on an HARQ process corresponding to the MBS data among the at least one HARQ process for the MBS.

Embodiments of the present application relate to a method, terminal device, and network device for transmitting sidelink data. The method includes: receiving, by a first terminal device, sidelink transmission resource indication information and first uplink transmission resource indication information configured by a network device, where the sidelink transmission resource indication information is used for indicating a sidelink transmission resource, and the first uplink transmission resource indication information is used for indicating a first uplink transmission resource; transmitting, by the first terminal device, sidelink data to at least one second terminal device on the sidelink transmission resource; transmitting, by the first terminal device, the first feedback information to the network device, where the first feedback information is used for indicating whether the sidelink data has been received correctly.