Managing an overlap between a set of resources allocated to a positioning reference signal and a set of resources allocated to a physical channel
Disclosed are techniques for handling an overlap between a higher priority channel and a lower priority channel. In an aspect, a transmitter node detects an overlap between an allocation of a first set of resources of a wireless communication link for transmission of the lower priority channel and an allocation of a second set of resources of the wireless communication link for transmission of the higher priority channel, removes a subset of resources from the first set of resources to generate a removed subset of resources of the first set of resources and a remaining subset of resources of the first set of resources, and transmits, to a receiver node, the lower priority channel on the remaining subset of resources, wherein the higher priority channel is transmitted on the removed subset of resources, wherein the higher priority channel or the lower priority channel is a positioning reference signal.
1. A method of wireless communication performed by a user equipment (UE), comprising:
detecting an overlap between an allocation of a first set of resources of a wireless communication link for transmission of a lower priority channel and an allocation of a second set of resources of the wireless communication link for transmission of a higher priority channel;
removing a subset of resources from the allocation of the first set of resources to generate a removed subset of resources of the first set of resources and a remaining subset of resources of the first set of resources; and
transmitting, to a cell of a base station, the lower priority channel on the remaining subset of resources, wherein the higher priority channel is transmitted on at least a portion of the removed subset of resources,
wherein the higher priority channel is a physical uplink shared channel (PUSCH) and the lower priority channel is a sounding reference signal (SRS) for positioning.
2. The method of claim 1 , wherein the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being transmitted aperiodically and the lower priority channel being transmitted periodically or semi-persistently.
3. The method of claim 1 , wherein the higher priority channel is transmitted at a first periodicity and the lower priority channel is transmitted at a second periodicity, and wherein the higher priority channel has a higher priority than the lower priority channel based on the first periodicity being lower than the second periodicity.
4. The method of claim 1 , wherein the higher priority channel is transmitted at a first periodicity and the lower priority channel is transmitted at a second periodicity, and wherein the higher priority channel has a higher priority than the lower priority channel based on the first periodicity being higher than the second periodicity.
5. The method of claim 1 , wherein the removing comprises:
puncturing the first set of resources, wherein the at least the portion of the removed subset of resources comprises a punctured subset of resources of the first set of resources and the remaining subset of resources comprises a non-punctured subset of resources of the first set of resources.
6. The method of claim 1 , wherein the removing comprises:
performing a rate matching operation, wherein channelization for the lower priority channel is modified to account for the removed subset of resources not being available for transmission of the lower priority channel, wherein the channelization for the lower priority channel includes one or more of payload selection, channel-coding, modulation mapping, and resource-element mapping.
7. The method of claim 6 , wherein the rate matching operation comprises a grant modification, and wherein the grant modification comprises:
overriding a start and length indication value (SLIV) indicator of an allocation of the first set of resources to exclude resources overlapping the second set of resources.
8. The method of claim 6 , wherein the grant modification comprises:
overriding a slot indication for the first set of resources and using a slot following the second set of resources for the first set of resources.
9. The method of claim 1 , further comprising:
receiving an allocation of the first set of resources of the wireless communication link for transmission of the lower priority channel to the cell of the base station.
10. The method of claim 1 , wherein the first set of resources comprises a first set of orthogonal frequency division multiplexing (OFDM) symbols, a first set of slots, a first set of resource elements, a first set of resource blocks, or any combination thereof of one or more radio frames and the second set of resources comprises a second set of OFDM symbols, a second set of slots, a second set of resource elements, a second set of resource blocks, or any combination thereof of the one or more radio frames.
11. The method of claim 1 , wherein the overlapping between the first set of resources and the second set of resources comprises an overlap in time and frequency resources or an overlap in time resources only.
12. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a serving cell of a base station, an allocation of a first set of resources of a wireless communication link for transmission of a lower priority channel to the serving cell;
detecting an overlap between the first set of resources of the wireless communication link allocated for transmission of the lower priority channel and a second set of resources of the wireless communication link allocated for transmission of a higher priority channel; and
rejecting the allocation of the first set of resources for transmission of the lower priority channel based on the overlap,
wherein at least one of the higher priority channel and the lower priority channel is a positioning reference signal configured to be measured by a UE to enable the UE to be located.
13. The method of claim 12 , wherein the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being transmitted aperiodically and the lower priority channel being transmitted periodically or semi-persistently.
14. The method of claim 12 , wherein:
the higher priority channel is transmitted at a first periodicity and the lower priority channel is transmitted at a second periodicity, and wherein the higher priority channel has a higher priority than the lower priority channel based on the first periodicity being lower than the second periodicity, or
the higher priority channel is transmitted at a first periodicity and the lower priority channel is transmitted at a second periodicity, and wherein the higher priority channel has a higher priority than the lower priority channel based on the first periodicity being higher than the second periodicity.
15. The method of claim 12 , wherein the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being an uplink signal and the lower priority channel being a downlink signal.
16. The method of claim 12 , wherein the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being a downlink signal and the lower priority channel being an uplink signal.
17. The method of claim 12 , wherein:
the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being a unicast signal and the lower priority channel being a broadcast or multicast signal, or
the higher priority channel has a higher priority than the lower priority channel based on the higher priority channel being a broadcast or multicast signal and the lower priority channel being a unicast signal.
18. The method of claim 12 , wherein the first set of resources comprises a first set of orthogonal frequency division multiplexing (OFDM) symbols, a first set of slots, a first set of resource elements, a first set of resource blocks, or any combination thereof of one or more radio frames and the second set of resources comprises a second set of OFDM symbols, a second set of slots, a second set of resource elements, a second set of resource blocks, or any combination thereof of the one or more radio frames.
19. The method of claim 12 , wherein the overlapping between the first set of resources and the second set of resources comprises an overlap in time and frequency resources or an overlap in time resources only.
20. A user equipment (UE), comprising:
a memory;
a communication device; and
at least one processor coupled to the memory and configured to:
detect an overlap between an allocation of a first set of resources of a wireless communication link for transmission of a lower priority channel and an allocation of a second set of resources of the wireless communication link for transmission of a higher priority channel;
remove a subset of resources from the allocation of the first set of resources to generate a removed subset of resources of the first set of resources and a remaining subset of resources of the first set of resources; and
cause the communication device to transmit, to a cell of a base station, the lower priority channel on the remaining subset of resources of the first set of resources, wherein the higher priority channel is transmitted on at least a portion of the removed subset of resources of the first set of resources,
wherein the higher priority channel is a physical uplink shared channel (PUSCH) and the lower priority channel is a sounding reference signal (SRS) for positioning.
21. A user equipment (UE), comprising:
a memory;
a communication device; and
at least one processor coupled to the memory and configured to:
cause the communication device to receive, from a serving cell of a base station, an allocation of a first set of resources of a wireless communication link for transmission of a lower priority channel to the serving cell;
detect an overlap between the first set of resources of the wireless communication link allocated for transmission of the lower priority channel and a second set of resources of the wireless communication link allocated for transmission of the higher priority channel; and
reject the allocation of the first set of resources for transmission of the lower priority channel based on the overlap,
wherein at least one of the higher priority channel and the lower priority channel is a positioning reference signal configured to be measured by a UE to enable the UE to be located.