The present disclosure discloses an information transmission method and a terminal device. The information transmission method includes: transmitting assistance information to at least one second terminal device if a periodic reporting condition or a preset trigger condition is met, where the assistance information is used for the at least one second terminal device to perform sidelink transmission.

Proposed is a method for performing wireless communication by a first device. The method may comprise a step of: transmitting a physical sidelink shared channel (PSSCH) through a resource selected in a first time area to a second device; receiving a physical sidelink feedback channel (PSFCH) related to the PSSCH from the second device; and on the basis that the interval between the first time area and a second time area is larger than a preconfigured threshold value, selecting a resource in the second time area to retransmit the PSSCH to the second device. For example, the first time area may precede the PSFCH. For example, the second time area may follow the PSFCH.

A method by which a first device performs wireless communication is presented. The method can comprise the step of transmitting data through a physical sidelink shared channel (PSSCH) to a second device, receiving, from the second device, hybrid automatic repeat request (HARQ) feedback related to the data through a physical sidelink feedback channel (PSFCH), and acquiring a channel occupancy ratio (CR) for a transmission resource related to the data in a first slot. For example, the transmission resource related to the data remaining after the reception of the HARQ feedback can be released, and the transmission resource related to the data, released after the first slot, cannot be considered with respect to the CR.

Methods, systems, and devices for wireless communications at a user equipment (UE) are described. The UE may receive control signaling for indicating an availability of a sidelink resource. The UE may attempt to decode the control signaling. The UE may select, based on receiving the control signaling, a log likelihood ratio quality value associated with the control signaling and a reference signal received power value associated with the control signaling. The UE may select a resource availability probability value associated with the sidelink resource based on attempting to decode the control signaling, the log likelihood ratio quality, and the reference signal received power value. The UE may transmit a sidelink message based at least in part on the resource availability probability value.

The present disclosure relates to a user equipment, a network node and respective communication methods for a user equipment and a network node. A according to some embodiments, a user equipment comprises a transceiver which, in operation, receives data on a plurality of downlink shared channels, the data received on the plurality of downlink shared channels being respectively the same data, and circuitry which, in operation, decodes the data, generates an indicator which indicates whether or not the data has been successfully decoded using the plurality of downlink shared channels. The transceiver, in operation, transmits the indicator on at least one of a plurality of uplink control channels associated respectively with the plurality of downlink shared channels.

Provided are a method and apparatus for controlling sidelink communication. The method for performing, by a terminal, sidelink communication, may include the steps of: for a sidelink HARQ operation, receiving, from a base station, sidelink discontinuous HARQ configuration information used for monitoring a physical downlink control channel (PDCCH); transmitting sidelink data; and monitoring, in a PDCCH discontinuous monitoring section, the PDCCH configured on the basis of discontinuous reception (DRX) parameters included in the sidelink discontinuous HARQ configuration information.

Certain aspects of the present disclosure provide techniques for multiplexing HARQ feedback in a same slot for downlink and sidelink transmissions. An example method generally includes receiving, from a network entity, a downlink control information (DCI) that schedules resources for at least one physical sidelink shared channel (PSSCH) transmission from the first UE to a second UE, transmitting data to the second UE via the at least one PSSCH transmission using the scheduled resources, receiving, from the second UE, acknowledgment feedback for the at least one PSSCH transmission, selecting at least one codebook entry for providing feedback for at least one downlink transmission from the network entity to the first UE and the acknowledgment feedback for the at least one PSSCH transmission in a same physical uplink control channel (PUCCH) slot, and transmitting the at least one codebook entry to the network entity via at least one PUCCH transmission.

Certain aspects of the present disclosure provide a method for wireless communications by a transmitter UE. The method generally includes receiving, from a network entity, a downlink control information (DCI) allocating resources in an unlicensed frequency band for multiple physical sidelink shared channel (PSSCH) transmissions to at least one receiver UE across transmission time intervals (TTIs), performing a listen-before-talk (LBT) channel access procedure in the TTIs, and transmitting at least one LBT report to the network entity on a physical uplink control channel (PUCCH) resource that occurs before another PUCCH resource used for transmitting acknowledgment feedback for the PSSCH transmissions.

Methods, systems, and devices for wireless communication are described. A device may receive a grant that schedules a set of sidelink occasions associated with sidelink communication from the device, and that indicates a set of uplink occasions for indicating feedback associated with the sidelink communication. The device may transmit a sidelink message during a sidelink occasion of the set of sidelink occasions, and generate feedback information based on the transmitted sidelink message. The feedback information may include an acknowledgement (ACK) or a negative acknowledgment (NACK) associated with the sidelink message. The device may transmit an uplink feedback message including the feedback information during an uplink occasion of the set of uplink occasions. The feedback information may include an indication of the ACK or the NACK.

Disclosed are a sidelink transmission resource configuration method and system, and a device and a storage medium. In the method, a terminal device can receive scheduling information from a network device, and determine a first available resource, which is not earlier than a target moment, in a resource pool to be a sidelink transmission moment, wherein the target moment is related to a time correlation parameter, and the time correlation parameter can be from the scheduling information or a terminal. According to the method, a sidelink transmission moment of a terminal can be determined, thereby making up for the defect in the prior art of there being a lack of solutions for determining a sidelink transmission moment, and improving the stability and flexibility of a sidelink transmission process.