Applying spatial relations to UL transmission occasions
Some present implementations provide a method for indicating multiple spatial relations for uplink (UL) transmissions by a user equipment (UE). The method may receive a first configuration for configuring one or more physical uplink control channel (PUCCH) resources. The method may further receive a second configuration for configuring a plurality of spatial relations. The method may also receive a signal that indicates at least one of a first mode or a second mode. The method may further receive downlink control information (DCI) indicating a PUCCH resource from the one or more PUCCH resources, where first and second spatial relations are activated for the PUCCH resource. The method may derive a plurality of PUCCH transmission occasions associated with the indicated PUCCH resource. A same uplink control information (UCI) content may be transmitted on each of the plurality of PUCCH transmission occasions by applying the spatial relations based on the indicated mode.
1. A method for a user equipment (UE), the method comprising:
receiving a first configuration for configuring one or more physical uplink control channel (PUCCH) resources;
receiving a second configuration for configuring a plurality of spatial relations, each spatial relation comprising a spatial parameter for uplink (UL) transmission and a parameter for UL power control;
receiving a signal that indicates one of a first mode or a second mode;
receiving downlink control information (DCI) indicating a PUCCH resource from the one or more PUCCH resources, wherein first and second spatial relations of the plurality of spatial relations are activated for the PUCCH resource;
deriving a plurality of PUCCH transmission occasions associated with the indicated PUCCH resource;
transmitting a same uplink control information (UCI) content on each of the plurality of PUCCH transmission occasions;
when a total number of the plurality of PUCCH transmission occasions is larger than two and the signal indicates the first mode,
applying the first spatial relation on (4*N+1)-th and (4*N+2)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions, wherein N is an integer equal to, or greater than, zero, and
applying the second spatial relation on (4*N+3)-th and (4*N+4)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions; and
when the total number of the plurality of PUCCH transmission occasions is equal to two, or when the total number of the plurality of PUCCH transmission occasions is larger than two and the signal indicates the second mode,
applying the first spatial relation on (2*N+1)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions, and
applying the second spatial relation on (2*N+2)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions.
2. The method of claim 1 , wherein the signal comprises a Radio Resource Control (RRC) parameter.
3. The method of claim 1 , wherein the DCI comprises a DCI scheduling downlink transmission.
4. The method of claim 1 , wherein the first spatial relation and the second spatial relation are activated by a single MAC-CE.
5. The method of claim 1 , wherein each of the first and second spatial relations is activated by a different MAC-CE.
6. The method of claim 1 , wherein the plurality of PUCCH transmission occasions correspond to a plurality of time units.
7. The method of claim 6 , wherein each time unit of the plurality of time units is one of a slot, a sub-slot, a mini-slot, or a number of symbols.
8. The method of claim 1 , wherein receiving the first and second configurations comprises receiving the first and second configurations from at least one of first and second transmission reception points (TRPs).
9. The method of claim 1 , wherein:
the first configuration is associated with a first value of an index;
the second configuration is associated with a second value of the index; and
the index is associated with a Control Resource Set pool index (CORESETPoolIndex).
10. The method of claim 1 , wherein each of the plurality of PUCCH transmission occasions is transmitted to one of first and second transmission reception points (TRPs).
11. A user equipment (UE), comprising:
one or more non-transitory computer-readable media storing one or more computer- executable instructions; and
at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the one or more computer-executable instructions to:
receive a first configuration for configuring one or more physical uplink control channel (PUCCH) resources;
receive a second configuration for configuring a plurality of spatial relations, each spatial relation comprising a spatial parameter for uplink (UL) transmission and a parameter for UL power control;
receive a signal that indicates one of a first mode or a second mode;
receive downlink control information (DCI) indicating a PUCCH resource from the one or more PUCCH resources, wherein first and second spatial relations of the plurality of spatial relations are activated for the PUCCH resource;
derive a plurality of PUCCH transmission occasions associated with the indicated PUCCH resource;
transmit a same uplink control information (UCI) content on each of the plurality of PUCCH transmission occasions;
when a total number of the plurality of PUCCH transmission occasions is larger than two and the signal indicates the first mode, the at least one processor is further configured to execute the computer-executable instructions to:
apply the first spatial relation on (4*N+1)-th and (4*N+2)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions, wherein N is an integer equal to, or greater than, zero, and
apply the second spatial relation on (4*N+3)-th and (4*N+4)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions; and
when the total number of the plurality of PUCCH transmission occasions is equal to two, or when the total number of the plurality of PUCCH transmission occasions is larger than two and the signal indicates the second mode, the at least one processor is further configured to execute the computer-executable instructions to:
apply the first spatial relation on (2*N+1)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions, and
apply the second spatial relation on (2*N+2)-th PUCCH transmission occasions among the plurality of PUCCH transmission occasions.
12. The UE of claim 11 , wherein the signal comprises a Radio Resource Control (RRC) parameter.
13. The UE of claim 11 , wherein the DCI comprises a DCI scheduling downlink transmission.
14. The UE of claim 11 , wherein the first spatial relation and the second spatial relation are activated by a single MAC-CE.
15. The UE of claim 11 , wherein each of the first and second spatial relations is activated by a different MAC-CE.
16. The UE of claim 11 , wherein the plurality of PUCCH transmission occasions correspond to a plurality of time units.
17. The UE of claim 16 , wherein each time unit of the plurality of time units is one of a slot, a sub-slot, a mini-slot, or a number of symbols.
18. The UE of claim 11 , wherein the first and second configurations are received from at least one of first and second transmission reception points (TRPs).
19. The UE of claim 11 , wherein:
the first configuration is associated with a first value of an index;
the second configuration is associated with a second value of the index; and
the index is associated with a Control Resource Set pool index (CORESETPoolIndex).
20. The UE of claim 11 , wherein each of the plurality of PUCCH transmission occasions is transmitted to one of first and second transmission reception points (TRPs).