Certain aspects of the present disclosure provide techniques for wireless communications in a vehicle-to-everything (V2X) system. An example method generally includes receiving, from a user equipment (UE) through a serving network entity, a request for information from the V2X application server, wherein the request includes an indication of a type of the requested information and a location of the UE; identifying one or more parameters for transmission of the requested information to the UE via a transmitter UE; and transmitting, to the serving network entity, the requested information for transmission to the UE through the transmitter UE based on the identified parameters.

Certain aspects of the present disclosure provide techniques for wireless communications in a vehicle-to-everything (V2X) system. An example method generally includes receiving, from a user equipment (UE) through a serving network entity, a request for information from the V2X application server, wherein the request includes an indication of a type of the requested information and a location of the UE; identifying one or more parameters for transmission of the requested information to the UE via a transmitter UE; and transmitting, to the serving network entity, the requested information for transmission to the UE through the transmitter UE based on the identified parameters.

Provided in the implementations of the present disclosure are a resource set transmission method and a terminal device, which can avoid problems of hidden nodes, exposed nodes, half duplex, etc. avoided during resource selection, and improve the reliability of resource selection. The resource set transmission method includes: a first terminal sending first information, the first information being used for indicating M resource sets, wherein the M resource sets are targeted at one target terminal, or each resource set in the M resource sets is targeted at one or more target terminals, and the resource set is used for determining a candidate transmission resource when the target terminal performs resource selection, and M is a positive integer and M≥1.

Provided in the implementations of the present disclosure are a resource set transmission method and a terminal device, which can avoid problems of hidden nodes, exposed nodes, half duplex, etc. avoided during resource selection, and improve the reliability of resource selection. The resource set transmission method includes: a first terminal sending first information, the first information being used for indicating M resource sets, wherein the M resource sets are targeted at one target terminal, or each resource set in the M resource sets is targeted at one or more target terminals, and the resource set is used for determining a candidate transmission resource when the target terminal performs resource selection, and M is a positive integer and M≥1.

Methods and apparatuses for inter-user equipment (UE) co-ordination signaling in a wireless communication system. A method of operating a UE includes receiving a first stage sidelink control information (SCI) format that includes information on a second stage SCI format. The first stage SCI format is a SCI format 1-A and the second stage SCI format is a SCI format 2 -C. The method further includes receiving the SCI format 2-C and determining, based on an indicator field in the SCI format 2-C, a type of information included in the SCI format 2-C.

Methods and apparatuses for inter-user equipment (UE) co-ordination signaling in a wireless communication system. A method of operating a UE includes receiving a first stage sidelink control information (SCI) format that includes information on a second stage SCI format. The first stage SCI format is a SCI format 1-A and the second stage SCI format is a SCI format 2 -C. The method further includes receiving the SCI format 2-C and determining, based on an indicator field in the SCI format 2-C, a type of information included in the SCI format 2-C.

A wireless device receives a first message configuring one or more time intervals for transmissions of coordination information for one or more sidelink transmissions by a second wireless device. The coordination information indicates a set of resources for the one or more sidelink transmissions and/or a resource collision between a first resource and a second resource. A first sidelink control information (SCI) of the one or more sidelink transmissions includes a parameter indicating resource reservation of the first resource and the first wireless device receives a second SCI indicating resource reservation of the second resource. The wireless device selects, from the one or more time intervals, a time interval based on a discontinuous reception (DRX) active time of the second wireless device. The wireless device transmits, during the DRX active time and to the second wireless device and based on the time interval, the coordination information.

A wireless device receives a first message configuring one or more time intervals for transmissions of coordination information for one or more sidelink transmissions by a second wireless device. The coordination information indicates a set of resources for the one or more sidelink transmissions and/or a resource collision between a first resource and a second resource. A first sidelink control information (SCI) of the one or more sidelink transmissions includes a parameter indicating resource reservation of the first resource and the first wireless device receives a second SCI indicating resource reservation of the second resource. The wireless device selects, from the one or more time intervals, a time interval based on a discontinuous reception (DRX) active time of the second wireless device. The wireless device transmits, during the DRX active time and to the second wireless device and based on the time interval, the coordination information.

The present invention provides a method performed by user equipment and user equipment. The method comprises: receiving downlink control information (DCI) comprising sidelink communication scheduling information and transmitted by a base station; determining the number of bits in an indication field for lowest index of the subchannel allocation to the initial transmission; and determining a resource index of a physical sidelink control channel (PSCCH).

A user equipment (UE) and a sidelink resource exclusion method are provided. The sidelink resource exclusion method includes identifying a first sidelink resource selected by the UE or reserved by a peer UE in a first slot from a candidate resource set in a resource selection window and in a first sidelink resource pool and excluding the first sidelink resource and/or sidelink subchannels in the first slot from the candidate resource set. This can solve issues in the prior art, increase a number of available resources that can be selected from the remaining candidate resource set, reduce interference to other transmissions in the same sidelink resource pool, reduce probability of transmission (Tx) collisions with other UEs, provide a good communication performance, and/or provide high reliability.