A configuration information indication method and apparatus, applicable to systems such as a vehicle to everything V2X communication system and a vehicle-to-vehicle V2V communication system, to resolve a problem that SL transmission causes interference to DL transmission due to relatively poor indication accuracy of UL transmission time in the conventional technology. The method includes: receiving an uplink-downlink time division duplex TDD configuration from a network device; determining, based on first periodicity information included in the uplink-downlink TDD configuration, a first subcarrier spacing SCS corresponding to the first periodicity information, where the first SCS is used to indicate a sidelink SL reference SCS; and sending indication information to a second terminal device based on the uplink-downlink TDD configuration and the first SCS, where the indication information is used to indicate uplink UL transmission time corresponding to the first periodicity information.

This application relates to a communication method, apparatus, and system, and is applicable to fields such as internet of vehicles, intelligent driving, assisted driving, and intelligent connected vehicles. A first terminal apparatus detects sidelink control information from at least one second terminal apparatus to determine a first time-frequency resource. The first terminal apparatus sends first information to a third terminal apparatus, to trigger determining of second information. The first terminal apparatus receives the second information from the third terminal apparatus, to indicate a second time-frequency resource. The first terminal apparatus determines the third time-frequency resource based on the second time-frequency resource and the first time-frequency resource. The first terminal apparatus may use both a sensing result of the first terminal apparatus and a sensing result of the third terminal apparatus as consideration factors to select a resource for sending data, to improve signal received quality.

A sidelink resource determining method includes determining, by a first terminal device, a first sidelink candidate resource through monitoring. The method also includes receiving, by the first terminal device, at least one piece of resource indication information from a second terminal device. The at least one piece of resource indication information indicates at least one second sidelink candidate resource obtained by the second terminal device through monitoring. The method further includes determining, by the first terminal device, a sidelink sending resource based on the first sidelink candidate resource and based on the at least one second sidelink candidate resource. The method additionally includes sending, by the first terminal device, sidelink control information and data on the sidelink sending resource.

A user equipment (UE) may sense a first transmission by a first sidelink UE and a second transmission by a second sidelink UE and send a conflict indication to at least one of the first or second sidelink UEs in response to identifying a collision between the first and second transmissions, or identifying a prospective collision based on a prospective use of respective first and second resources identified in the respective first and second transmissions. A collision or prospective collision may be detected by detecting a complete or partial overlap of the first and second transmissions or of the prospective first and second resources identified in the transmissions, or by determining that any portions of the first resource and the second resource prospectively occupy a slot common to the first and second resources, and the first sidelink UE and the second sidelink UE prospectively operate in a half-duplex mode.

Methods and apparatuses for channel occupancy sharing with a sidelink in a wireless communication system. A method of a user equipment (UE) includes receiving, from a base station (BS), a set of configurations, determining a channel occupancy initiated by the BS based on the set of configurations, determining a set of resources for a first sidelink transmission within the channel occupancy based on the set of configurations, and determining a sidelink channel access procedure associated with the first sidelink transmission based on the set of configurations. The method further includes performing the sidelink channel access procedure and transmitting, to at least one other UE, the first sidelink transmission within the channel occupancy upon successfully performing the sidelink channel access procedure.

Proposed herein are a method for performing wireless communication by a first apparatus and an apparatus supporting the same. The method may include the steps of obtaining SL DRX configuration including information related to SL DRX active time of a second apparatus, determining a selection window, selecting at least one first candidate resource within the selection window based on sensing, selecting at least one second candidate resource within the SL DRX active time of the second apparatus, based on the at least one first candidate resource not being within the SL DRX active time of the second apparatus, selecting an SL resource from among the at least one first candidate resource and the at least one second candidate resource, transmitting first SCI, to the second apparatus, for scheduling a PSSCH and second SCI, through a PSCCH, based on the SL resource, and transmitting the second SCI and a MAC PDU to the second apparatus, through the PSSCH, based on the SL resource.

Methods, systems, and devices for wireless communications are described in which a user equipment (UE) may perform uplink reference signal bundling for access link communications and transmit sidelink communications using time or frequency division multiplexed resources. The UE may determine to drop or to transmit a sidelink communication based on a relationship with multiple instances of an uplink reference signal that are to maintain phase continuity. The UE may drop a sidelink communication when a time duration between two instances of the uplink reference signal is less than or equal to a time threshold value, and may transmit the sidelink communication when the time duration exceeds the time threshold value. In frequency division multiplexed cases, the UE may set a transmission power for each instance of the uplink reference signal, and the sidelink communication may use a remaining amount of power.

An information processing method, and the method includes: receiving, by a base station, a buffer status report BSR sent by a first user equipment UE; sending, by the base station, scheduling information to a corresponding second UE based on at least one of a number of the first UEs and the BSR; and allocating SL resource to the first UE according to received sidelink SL resource perception information reported by the second UE based on the scheduling information.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, an indication of a first sidelink grant associated with a first set of resources. The UE may receive, from the network entity, an indication of a second sidelink grant associated with a second set of resources, wherein the first set of resources at least partially overlaps in a time domain with the second set of resources. The UE may perform an action based at least in part on the first set of resources at least partially overlapping in the time domain with the second set of resources. The UE may transmit one or more sidelink messages using at least one of the first sidelink grant or the second sidelink grant based at least in part on performing the action. Numerous other aspects are described.

A user equipment (UE) communicates on a shared channel using sidelink transmissions. The UE determines a channel access priority for the sidelink transmission based on a channel access priority for the UE, a channel access priority associated with a packet priority of the sidelink transmission, a congestion level for the channel, or a remaining time in a packet delay budget of the sidelink transmission. The UE performs a channel access procedure based on the channel access priority for the sidelink transmission to assess that the channel is clear prior to transmitting the sidelink transmission, and transmits the sidelink transmission on the channel.