Systems and methods for enhancement on sidelink power control
Systems and methods for sidelink (SL) power control within wireless communication systems are disclosed herein. A user equipment (UE) selects a parameter set to use to calculate a transmit power of one or more channels to be transmitted according to an SL session with a peer UE from a plurality of parameter sets each configured for use according to a distance between the UE and the peer UE. A UE determines whether an SL pathloss based calculation is to be used to calculate a transmit power of a channel according to an SL session with a peer UE, wherein that calculation is configured to be used depending on a distance between the UE and the peer UE. UE selection of a number of physical SL feedback channel (PSFCH) transmissions to match a UE capability and determinations regarding whether to perform PSFCH reception or PSFCH transmission are also discussed.
1. A method for a user equipment (UE), to prioritize between using a time resource for physical sidelink (SL) feedback channel (PSFCH) transmission by the UE and PSFCH reception at the UE, the method comprising:
determining that the PSFCH transmission and the PSFCH reception are scheduled to occur during the time resource;
determining to perform one of the PSFCH transmission and the PSFCH reception during the time resource according to a plurality of rules, wherein the plurality of rules comprises:
a distance rule that selects one of the PSFCH transmission and the PSFCH reception for performance when a PSFCH message of the one of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is a long distance from the UE and all PSFCH messages of the other of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is not a long distance from the UE; and
a second rule that is used to select one of the PSFCH transmission and the PSFCH reception for performance when PFSCH messages of the PSFCH transmission and PFSCH messages of the PSFCH reception are all between the UE and the peer UE that is not a long distance from the UE; and
performing the one of the PSFCH transmission and the PSFCH reception during the time resource according to the determination.
2. The method of claim 1 , wherein the second rule comprises a data priority rule that selects one of the PSFCH transmission and the PSFCH reception for performance when data corresponding to any PSFCH message of the one of the PSFCH transmission and the PSFCH reception has a higher priority than data corresponding to each of the PSFCH messages of the other of the PSFCH transmission and the PSFCH reception.
3. An apparatus of a user equipment (UE) operable to prioritize between using a time resource for physical sidelink (SL) feedback channel (PSFCH) transmission by the UE and PSFCH reception at the UE, the apparatus comprising:
one or more processors; and
a memory storing instructions that, when executed by the one or more processors, cause the UE to:
determine that the PSFCH transmission and the PSFCH reception are scheduled to occur during the time resource;
determine to perform one of the PSFCH transmission and the PSFCH reception during the time resource according to a plurality of rules, wherein the plurality of rules comprises:
a distance rule that selects one of the PSFCH transmission and the PSFCH reception for performance when a PSFCH message of the one of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is a long distance from the UE and all PSFCH messages of the other of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is not a long distance from the UE; and
a second rule that is used to select one of the PSFCH transmission and the PSFCH reception for performance when PFSCH messages of the PSFCH transmission and PFSCH messages of the PSFCH reception are all between the UE and the peer UE that is not a long distance from the UE; and
perform the one of the PSFCH transmission and the PSFCH reception during the time resource according to the determination.
4. The apparatus of claim 3 , wherein the second rule comprises a data priority rule that selects one of the PSFCH transmission and the PSFCH reception for performance when data corresponding to any PSFCH message of the one of the PSFCH transmission and the PSFCH reception has a higher priority than data corresponding to each of the PSFCH messages of the other of the PSFCH transmission and the PSFCH reception.
5. A non-transitory computer-readable storage medium including instructions that, when executed by one or more processors of a user equipment (UE) operable to prioritize between using a time resource for physical sidelink (SL) feedback channel (PSFCH) transmission by the UE and PSFCH reception at the UE, cause the UE to:
determine that the PSFCH transmission and the PSFCH reception are scheduled to occur during the time resource;
determine to perform one of the PSFCH transmission and the PSFCH reception during the time resource according to a plurality of rules, wherein the plurality of rules comprises:
a distance rule that selects one of the PSFCH transmission and the PSFCH reception for performance when a PSFCH message of the one of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is a long distance from the UE and all PSFCH messages of the other of the PSFCH transmission and the PSFCH reception are between the UE and a peer UE which is not a long distance from the UE; and
a second rule that is used to select one of the PSFCH transmission and the PSFCH reception for performance when PFSCH messages of the PSFCH transmission and PFSCH messages of the PSFCH reception are all between the UE and the peer UE that is not a long distance from the UE; and
perform the one of the PSFCH transmission and the PSFCH reception during the time resource according to the determination.
6. The non-transitory computer-readable storage medium of claim 5 , wherein the second rule comprises a data priority rule that selects one of the PSFCH transmission and the PSFCH reception for performance when data corresponding to any PSFCH message of the one of the PSFCH transmission and the PSFCH reception has a higher priority than data corresponding to each of the PSFCH messages of the other of the PSFCH transmission and the PSFCH reception.