Resource allocation and processing behaviors for NR V2X sidelink communications
An apparatus of user equipment (UE) includes processing circuitry coupled to a memory, where to configure the UE for New Radio (NR) vehicle-to-everything (V2X) sidelink communication. The processing circuitry is to determine a set of candidate resources of the UE from a sidelink resource pool, the sidelink resource divided into multiple time slots, frequency channels, and frequency sub-channels. Sidelink control information (SCI) is encoded for transmission to a second UE via a physical sidelink control channel (PSCCH). The SCI indicates a plurality of transmission resources of the set of candidate resources. A transport block is mapped across the plurality of transmission resources. A physical sidelink shared channel (PSSCH) is encoded for transmission to the second UE using the plurality of transmission resources, the PSSCH encoded to include the mapped transport block.
1. An apparatus, comprising:
a memory; and
processing circuitry in communication with the memory, wherein, to configure a user equipment (UE) for vehicle-to-everything (V2X) sidelink communication, the processing circuitry is configured to:
determine a set of candidate resources of the UE from a sidelink resource pool, wherein the sidelink resource is divided into multiple time slots and frequency sub-channels;
perform first sensing on the set of candidate resources;
select a first plurality of transmission resources of the set of candidate resources based on the first sensing;
encode sidelink control information (SCI) for transmission to a second UE via a physical sidelink control channel (PSCCH), wherein the SCI indicates a reservation of the first plurality of transmission resources of the set of candidate resources;
after transmission of the SCI and before first transmission of an associated physical sidelink shared channel (PSSCH), perform second sensing on at least the first plurality of transmission resources, and select a second plurality of transmission resources of the set of candidate resources based on the second sensing; and
encode the associated PSSCH for transmission to the second UE using a plurality of transmission resources from the second plurality of transmission resources, wherein the PSSCH is encoded to include a transport block.
2. The apparatus of claim 1 ,
wherein the processing circuitry is further configured to:
perform channel quality measurements within a sensing window to determine the sidelink resource pool.
3. The apparatus of claim 2 ,
wherein the sensing window is configurable based on at least a maximum reservation interval associated with the V2X sidelink communication.
4. The apparatus of claim 1 ,
wherein the first sensing includes detecting announced resource reservations prior to transmission the SCI.
5. The apparatus of claim 1 ,
wherein the second sensing includes detecting announced resource reservations.
6. The apparatus of claim 1 ,
wherein the second plurality of resources includes a subset of the first plurality of resources.
7. The apparatus of claim 1 ,
wherein said selecting the first plurality of resources includes a random selection of resources.
8. The apparatus of claim 1 ,
wherein said selecting the first plurality of resources transmission is determined in part by a packet delay budget.
9. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a user equipment (UE), the instructions to configure the UE for New Radio (NR) vehicle-to-everything (V2X) sidelink communication, and to cause the UE to:
determine a set of candidate resources of the UE from a sidelink resource pool, wherein the sidelink resource is divided into multiple time slots and frequency sub-channels;
perform first sensing on the set of candidate resources;
select a first plurality of transmission resources of the set of candidate resources based on the first sensing;
encode sidelink control information (SCI) for transmission to a second UE via a physical sidelink control channel (PSCCH), wherein the SCI indicates a reservation of the first plurality of transmission resources of the set of candidate resources;
after transmission of the SCI and before first transmission of an associated physical sidelink shared channel (PSSCH), perform second sensing on at least the first plurality of transmission resources, and select a second plurality of transmission resources of the set of candidate resources based on the second sensing; and
encode the associated PSSCH for transmission to the second UE using a plurality of transmission resources from the second plurality of transmission resources, wherein the PSSCH is encoded to include a transport block.
10. The non-transitory computer-readable storage medium of claim 9 ,
wherein the first sensing includes detecting announced resource reservations prior to transmission the SCI.
11. The non-transitory computer-readable storage medium of claim 9 ,
wherein the second sensing includes detecting announced resource reservations.
12. The non-transitory computer-readable storage medium of claim 9 ,
wherein the second plurality of resources includes a subset of the first plurality of resources.
13. The non-transitory computer-readable storage medium of claim 9 ,
wherein said selecting the first plurality of resources includes a random selection of resources.
14. The non-transitory computer-readable storage medium of claim 9 ,
wherein said selecting the first plurality of resources transmission is determined in part by a packet delay budget.
15. A method, comprising:
determining a set of candidate resources of a user equipment (UE) from a sidelink resource pool, wherein the sidelink resource is divided into multiple time slots and frequency sub-channels;
performing first sensing on the set of candidate resources;
selecting a first plurality of transmission resources of the set of candidate resources based on the first sensing;
encoding sidelink control information (SCI) for transmission to a second UE via a physical sidelink control channel (PSCCH), wherein the SCI indicates a reservation of the first plurality of transmission resources of the set of candidate resources;
after transmission of the SCI and before first transmission of an associated physical sidelink shared channel (PSSCH), performing second sensing on at least the first plurality of transmission resources, and select a second plurality of transmission resources of the set of candidate resources based on the second sensing; and
encoding the associated PSSCH for transmission to the second UE using a plurality of transmission resources from the second plurality of transmission resources, wherein the PSSCH is encoded to include a transport block.
16. The method of claim 15 ,
wherein the first sensing includes detecting announced resource reservations prior to transmission the SCI.
17. The method of claim 15 ,
wherein the second sensing includes detecting announced resource reservations.
18. The method of claim 15 ,
wherein the second plurality of resources includes a subset of the first plurality of resources.
19. The method of claim 15 ,
wherein said selecting the first plurality of resources includes a random selection of resources.
20. The method of claim 15 ,
wherein said selecting the first plurality of resources transmission is determined in part by a packet delay budget.