Efficient techniques for resource selection assistance reporting for NR Rel-17 sidelink
A user equipment (UE) and a method are provided. The UE includes a memory and a processor configured to receive data from at least one neighboring UE; determine, based at least partially on the received data, whether to send an assistance report including assistance information providing an indication related to communication; and transmit the assistance report including the assistance information in response to determining to send the assistance report.
1. A user equipment (UE), comprising:
a memory; and
a processor configured to:
receive data from at least one neighboring UE;
determine, based at least partially on the received data, whether to send an assistance report including assistance information providing an indication related to communication; and
transmit the assistance report including the assistance information in response to determining to send the assistance report by applying a sequence offset to resources of a physical sidelink feedback channel (PSFCH), wherein a value of the sequence offset corresponds to the assistance information based on a cast type, and wherein the assistance information includes a field indicating a location of a non-preferred resource.
2. The UE of claim 1 , wherein the assistance information indicates at least one resource for data transmission.
3. The UE of claim 1 , wherein the sequence offset is applied in a frequency domain or a code domain on the resources of the PSFCH.
4. The UE of claim 3 , wherein the PSFCH sequence offset indicates an identification (ID) of the UE and information about a type of assistance being reported, and
wherein the information about the type of assistance being reported includes information indicating a type of communication problem.
5. The UE of claim 3 , wherein an association between the PSFCH sequence offset and the assistance information is based on whether the association is pre-configured for a resource pool or whether the association is separately configured for each UE.
6. The UE of claim 1 , wherein the assistance report is transmitted on time resources of a physical sidelink feedback channel (PSFCH).
7. The UE of claim 1 , wherein the processor is further configured to:
detect a channel busy ratio (CBR),
wherein assistance reports are limited to specific scenarios when the CBR is above a predetermined threshold.
8. The UE of claim 1 , wherein the processor is further configured to:
assess a reliability of the assistance information based on at least one of a received reference signal received power (RSRP) level, a relative location of the at least one neighboring UE, a type of the at least one neighboring UE, or whether the at least one neighboring UE is in a trusted UE list.
9. The UE of claim 1 , wherein the processor is further configured to:
transmit the assistance report including the assistance information via second-stage sidelink control information (SCI) in response to determining to send the assistance report.
10. A user equipment (UE) comprising:
a memory; and
a processor configured to:
receive data from at least one neighboring UE;
determine, based at least partially on the received data, whether to send an assistance report including assistance information providing an indication related to communication; and
transmit the assistance report including the assistance information via second stage sidelink control information (SCI), in response to determining to send the assistance report, wherein the assistance information includes a field indicating a location of a non-preferred resource;
wherein the assistance information is encoded in a part of the second-stage SCI having a variable size,
wherein non-assistance information is encoded in a part of the second-stage SCI having a fixed size, and
wherein the assistance information is independently encoded with respect to the non-assistance information.
11. A method performed by a user equipment (UE), the method comprising:
receiving data from at least one neighboring UE;
determining, based at least partially on the received data, whether to send an assistance report including assistance information providing an indication related to communication; and
transmitting the assistance report including the assistance information in response to determining to send the assistance report by applying a sequence offset to resources of a physical sidelink feedback channel (PSFCH), wherein a value of the sequence offset corresponds to the assistance information based on a cast type, and wherein the assistance information includes a field indicating a location of a non-preferred resource.
12. The method of claim 11 , wherein the assistance information indicates at least one resource for data transmission.
13. The method of claim 11 , wherein the sequence offset is applied in a frequency domain or a code domain on the resources of the PSFCH.
14. The method of claim 13 , wherein the PSFCH sequence offset indicates an identification (ID) of the UE and information about a type of assistance being reported, and
wherein the information about the type of assistance being reported includes information indicating a type of communication problem.
15. The method of claim 13 , wherein an association between the PSFCH sequence offset and the assistance information is based on whether the association is pre-configured for a resource pool or whether the association is separately configured for each UE.
16. The method of claim 11 , wherein the assistance report is transmitted on time resources of a physical sidelink feedback channel (PSFCH).
17. The method of claim 11 , the method further comprising:
detecting a channel busy ratio (CBR),
wherein assistance reports are limited to specific scenarios when the CBR is above a predetermined threshold.
18. The method of claim 11 , further comprising:
assessing a reliability of the assistance information based on at least one of a received reference signal received power (RSRP) level, a relative location of the at least one neighboring UE, a type of the at least one neighboring UE, or whether the at least one neighboring UE is in a trusted UE list.
19. The method of claim 11 , further comprising:
transmitting the assistance report including the assistance information via second-stage sidelink control information (SCI) in response to determining to send the assistance report.
20. A method performed by a user equipment (UE), the method comprising:
receiving data from at least one neighboring UE;
determining, based at least partially on the received data, whether to send an assistance report including assistance information providing an indication related to communication; and
transmitting the assistance report including the assistance information via second-stage sidelink control information (SCI), in response to determining to send the assistance report by applying a sequence offset associated with the assistance information based on a cast type,
wherein the assistance information includes a field indicating a location of a non-preferred resource,
wherein the assistance information is encoded in a part of the second-stage SCI having a variable size,
wherein non-assistance information is encoded in a part of the second-stage SCI having a fixed size, and
wherein the assistance information is independently encoded with respect to the non-assistance information.