Collision handling for sounding reference signal (SRS) transmission
Systems, apparatus, methods, and computer-readable media provided for collision handling for sounding reference signal (SRS) transmission include one or more processors to receive configuration information for a first sounding reference signal (SRS) resource set and a second SRS resource set, wherein there is a guard period between SRS occasions of the first SRS resource set and respective SRS occasions of the second SRS resource set, determine that a first SRS occasion of the first SRS resource set and a second SRS occasion of the second SRS resource set are dropped based on a collision handling rule and encode an uplink message for transmission in the guard period between the first and second SRS occasions based on the determination.
1 . One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause a user equipment (UE) to:
receive configuration information for a first sounding reference signal (SRS) resource set and a second SRS resource set, wherein there is a guard period between SRS occasions of the first SRS resource set and respective SRS occasions of the second SRS resource set;
determine that a first SRS occasion of the first SRS resource set and a second SRS occasion of the second SRS resource set are dropped based on a collision handling rule; and
encode an uplink message comprising a physical uplink shared channel (PUSCH) message or a physical uplink control channel (PUCCH) message for transmission in the guard period between the first and second SRS occasions based on the determination.
2 . The one or more NTCRM of claim 1 , wherein the first SRS resource set, the second resource set, and the guard period have a same priority associated with the collision handling rule.
3 . The one or more NTCRM of claim 1 , wherein the first and second SRS occasions are aperiodic SRS occasions.
4 . The one or more NTCRM of claim 1 , wherein the first and second SRS occasions are in a same slot.
5 . The one or more NTCRM of claim 1 , wherein the first and second SRS occasions are in different slots.
6 . The one or more NTCRM of claim 1 , wherein the first and second SRS resource sets are in different component carriers.
7 . The one or more NTCRM of claim 1 , wherein the uplink message is a physical uplink shared channel (PUSCH) message or a physical uplink control channel (PUCCH) message.
8 . An apparatus to be implemented in a user equipment (UE), the apparatus comprising:
a memory to store a collision handling rule; and
processor circuitry coupled to the memory, the processor circuitry to:
determine to drop a first sounding reference signal (SRS) occasion of a first SRS resource set and a second SRS occasion of a second SRS resource set based on the collision handling rule, wherein the first and second SRS occasions are in different component carriers;
drop a gap period between the first and second SRS occasions based on the determination; and
encode a physical uplink shared channel (PUSCH) message or a physical uplink control channel (PUCCH) message for transmission in the gap period.
9 . The apparatus of claim 8 , wherein the processor circuitry is further to encode a physical uplink shared channel (PUSCH) message or a physical uplink control channel (PUCCH) message for transmission in the gap period.
10 . The apparatus of claim 8 , wherein the first SRS resource set, the second resource set, and the gap period have a same priority associated with the collision handling rule.
11 . The apparatus of claim 8 , wherein the first and second SRS occasions are aperiodic SRS occasions.
12 . The apparatus of claim 8 , wherein the first and second SRS occasions are in a same slot or in different slots.
13 . One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause a user equipment (UE) to:
determine that multiple aperiodic SRS resource sets are triggered to be transmitted in a same slot across different component carriers (CCs); and
drop transmission of one or more of the SRS resource sets according to a dropping rule, wherein the dropping rule is based on a user equipment (UE) capability.
14 . The one or more NTCRM of claim 13 , wherein the transmission is dropped if simultaneous transmission of the multiple aperiodic SRS resource sets over multiple CCs exceeds a capability of the UE.
15 . The one or more NTCRM of claim 13 , wherein the dropping rule includes to prioritize the respective SRS resource sets based on a SRS usage.
16 . The one or more NTCRM of claim 15 , wherein the SRS resource sets are prioritized further based on a component carrier ID or a SRS resource set ID.
17 . The one or more NTCRM of claim 13 , wherein a time period between a first SRS resource and a second SRS resource is greater than a required gap length, and wherein the instructions, when executed, further cause the UE to identify a set of symbols between the first and second SRS resources for a gap period.
18 . The one or more NTCRM of claim 17 , wherein the set of symbols for the gap period are predefined or configured via a message received from a next generation Node B (gNB).
19 . The one or more NTCRM of claim 17 , wherein the set of symbols immediately follows the first SRS resource or immediately precedes the second SRS resource.
20 . The one or more NTCRM of claim 17 , wherein the instructions, when executed, further cause the UE to perform collision handling for a gap period between the first and second SRS resources using a priority that is the same for the gap period as for one or both of the first and second SRS resources.