System and method for UE processing time relaxation for multi-TRP transmission
View Patent ↗Systems, devices, and techniques for adjusting a user equipment (UE) processing time parameter in a wireless communication system that include transmission and reception points (TRPs) are described. A described technique performed by UE includes receiving a first physical downlink shared channel (PDSCH) from a first TRP corresponding to a first scheduling physical downlink control channel (PDCCH) and a second PDSCH from a second TRP corresponding to a second scheduling PDCCH. The technique further includes transmitting a first hybrid automatic repeat request acknowledgement (HARQ-ACK) message and a second HARQ-ACK message based on the first PDSCH and the second PDSCH in accordance with a first processing time parameter and a second processing time parameter, respectively. The first processing time parameter can be based on a PDSCH mapping type, a processing capability of the UE, and one or more timing characteristics of the first PDSCH and the second PDSCH.
1. A method comprising:
receiving a first physical downlink shared channel (PDSCH) from a first transmission and reception point (TRP) corresponding to a first scheduling physical downlink control channel (PDCCH) and a second PDSCH from a second TRP corresponding to a second scheduling PDCCH, wherein the first PDSCH and the second PDSCH overlap at least partially in time in a slot; and
transmitting a first hybrid automatic repeat request acknowledgement (HARQ-ACK) message in accordance with a first processing time parameter,
wherein the first processing time parameter is based on a PDSCH mapping type, a processing capability of a user equipment (UE), and wherein the first processing time parameter is adjusted based on whether the first PDSCH is longer than seven symbols.
2. The method of claim 1 , wherein the first PDSCH ends earlier in time than the second PDSCH in the slot, and wherein the first processing time parameter is based on a relative difference in durations of the first PDSCH and the second PDSCH.
3. The method of claim 1 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH.
4. The method of claim 1 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH, and wherein the first processing time parameter is based on the number of overlapping symbols of the second scheduling PDCCH and the second PDSCH.
5. The method of claim 4 , wherein the first PDSCH and the second PDSCH are fully overlapped.
6. The method of claim 1 , wherein the first processing time parameter is based on a number of symbols allocated to the first PDSCH.
7. The method of claim 1 , wherein the first processing time parameter is adjusted based on whether the second PDSCH is longer than seven symbols.
8. The method of claim 1 , wherein the first processing time parameter is further based on a transmission overlap corresponding to the first TRP and the second TRP.
9. An apparatus comprising:
a processor; and
memory storing instructions that, when executed, cause the processor to perform operations comprising:
receiving a first physical downlink shared channel (PDSCH) from a first transmission and reception point (TRP) corresponding to a first scheduling physical downlink control channel (PDCCH) and a second PDSCH from a second TRP corresponding to a second scheduling PDCCH, wherein the first PDSCH and the second PDSCH overlap at least partially in time in a slot; and
causing transmission of a first hybrid automatic repeat request acknowledgement (HARQ-ACK) message in accordance with a first processing time parameter;
wherein the first processing time parameter is based on a PDSCH mapping type and a processing capability of—a user equipment (UE), and wherein the first processing time parameter is adjusted based on whether the first PDSCH is longer than seven symbols.
10. The apparatus of claim 9 , wherein the first PDSCH ends earlier in time than the second PDSCH in the slot, and wherein the first processing time parameter is based on a relative difference in durations of the first PDSCH and the second PDSCH.
11. The apparatus of claim 9 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH.
12. The apparatus of claim 9 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH, and wherein the first processing time parameter is based on the number of overlapping symbols of the second scheduling PDCCH and the second PDSCH.
13. The apparatus of claim 12 , wherein the first PDSCH and the second PDSCH are fully overlapped.
14. The apparatus of claim 9 , wherein the first processing time parameter is based on a number of symbols allocated to the first PDSCH.
15. The apparatus of claim 9 , wherein the first processing time parameter is adjusted based on whether the second PDSCH is longer than seven symbols.
16. A system comprising:
a first base station comprising a first transmission and reception point (TRP); and
a second base station comprising a second TRP, wherein the first and second base stations are configured to transmit, in a slot to a user equipment (UE), a first scheduling physical downlink control channel (PDCCH) and a second scheduling PDCCH,
wherein the first and second base stations are configured to transmit, in the slot to the UE, a first physical downlink shared channel (PDSCH) from the first TRP corresponding to the first scheduling PDCCH and a second PDSCH from the second TRP corresponding to the second scheduling PDCCH, wherein the first PDSCH and the second PDSCH overlap at least partially in time,
wherein the first and second base stations are configured to receive, from the UE, a first hybrid automatic repeat request acknowledgement (HARQ-ACK) message in accordance with a first processing time parameter, and
wherein the first processing time parameter is based on a PDSCH mapping type and a processing capability of the UE, and wherein the first processing time parameter is adjusted based on whether the first PDSCH is longer than seven symbols.
17. The system of claim 16 , wherein the first PDSCH ends earlier in time than the second PDSCH in the slot, and wherein the first processing time parameter is based on a relative difference in durations of the first PDSCH and the second PDSCH.
18. The system of claim 16 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH.
19. The system of claim 16 , wherein the first processing time parameter is based on the number of overlapping symbols of the first scheduling PDCCH and the first PDSCH, and wherein the first processing time parameter is based on the number of overlapping symbols of the second scheduling PDCCH and the second PDSCH.
20. The system of claim 19 , wherein the first PDSCH and the second PDSCH are fully overlapped.
21. The system of claim 16 , wherein the first processing time parameter is based on a number of symbols allocated to the first PDSCH.