Beam hopping within a single physical uplink control channel resource
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an activation command to activate multiple spatial relations for a single physical uplink control channel (PUCCH) resource. The UE may communicate in the single PUCCH resource using the multiple spatial relations. Numerous other aspects are provided.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving, via a medium access control control element (MAC-CE), an activation command to activate multiple spatial relations for a single physical uplink control channel (PUCCH) resource, the activation command comprising:
a PUCCH resource identifier identifying the single PUCCH resource to be activated,
a field indicating that information corresponding to a plurality of spatial relation identifiers for the single PUCCH resource is present, and
the plurality of spatial relation identifiers; and
communicating in the single PUCCH resource using a plurality of beam hops corresponding to the multiple spatial relations, wherein a first beam hop of the plurality of beam hops uses a first transmit power control accumulation function value based at least in part on a first closed loop index indicated by a first spatial relation of the multiple spatial relations, and a second beam hop of the plurality of beam hops uses a second transmit power control accumulation function value based at least in part on a second closed loop index indicated by a second spatial relation of the multiple spatial relations, when the first closed loop index and the second closed loop index are different.
2 . The method of claim 1 , wherein the MAC-CE includes a first field that indicates a first spatial relation identifier of the plurality of spatial relation identifiers, and a second field that indicates a second spatial relation identifier of the plurality of spatial relation identifiers.
3 . The method of claim 1 , wherein the UE is to communicate in the single PUCCH resource when the MAC-CE is received.
4 . The method of claim 1 , wherein a first spatial relation, of the multiple spatial relations, is associated with the first beam hop of the plurality of beam hops, and a second spatial relation, of the multiple spatial relations, is associated with the second beam hop of the plurality of beam hops, and
wherein the first beam hop is to use a first portion of symbols allocated to the single PUCCH resource, and the second beam hop is to use a second portion of the symbols allocated to the single PUCCH resource.
5 . The method of claim 4 , wherein the first beam hop is to use a first set of power control parameters indicated by the first spatial relation, and the second beam hop is to use a second set of power control parameters indicated by the second spatial relation.
6 . The method of claim 4 , wherein the first beam hop and the second beam hop are to use respective rate matching operations and resource element (RE) mapping operations.
7 . The method of claim 6 , wherein a first rate matching output sequence length for the first beam hop is based at least in part on available resources for uplink control information in the first beam hop, and a second rate matching output sequence length for the second beam hop is based at least in part on available resources for uplink control information in the second beam hop.
8 . The method of claim 7 , wherein RE mapping for the first beam hop includes mapping modulated symbols, corresponding to a first rate matching output sequence for the first beam hop, to the available resources of the first beam hop, and RE mapping for the second beam hop includes mapping modulated symbols, corresponding to a second rate matching output sequence for the second beam hop, to the available resources of the second beam hop.
9 . The method of claim 4 , wherein the first beam hop uses a first PUCCH power value and the second beam hop uses a second PUCCH power value.
10 . The method of claim 9 , wherein the first PUCCH power value is based at least in part on at least one of a first pathloss reference signal, a first offset value, or a first closed loop index, and the second PUCCH power value is based at least in part on at least one of a second pathloss reference signal, a second offset value, or a second closed loop index.
11 . The method of claim 9 , wherein the first PUCCH power value is based at least in part on at least one of a first quantity of resource elements or a first quantity of symbols, and the second PUCCH power value is based at least in part on at least one of a second quantity of resource elements or a second quantity of symbols.
12 . The method of claim 9 , wherein respective closed loop index values indicated by the first spatial relation and the second spatial relation are different, and
wherein a transmit power control (TPC) command indicated for the single PUCCH resource is applied to the respective closed loop index values, the TPC command indicated for the single PUCCH resource is applied to one of the respective closed loop index values, or respective TPC commands are indicated for the respective closed loop index values.
13 . The method of claim 4 , wherein the first beam hop is to use a first frequency hop and a second frequency hop of the single PUCCH resource, and the second beam hop is to use the first frequency hop and the second frequency hop.
14 . A method of wireless communication performed by a network entity, comprising:
determining multiple spatial relations that are to be activated, for a user equipment (UE), in a single physical uplink control channel (PUCCH) resource; and
transmitting, via a medium access control control element (MAC-CE), an activation command to the UE to activate the multiple spatial relations for use in a plurality of beam hops within a transmission using the single PUCCH resource, wherein a first beam hop of the plurality of beam hops uses a first transmit power control accumulation function value based at least in part on a first closed loop index indicated by a first spatial relation of the multiple spatial relations, and a second beam hop of the plurality of beam hops uses a second transmit power control accumulation function value based at least in part on a second closed loop index indicated by a second spatial relation of the multiple spatial relations, when the first closed loop index and the second closed loop index are different, and wherein the activation command comprises:
a PUCCH resource identifier identifying the single PUCCH resource to be activated,
a field indicating that information corresponding to a plurality of spatial relation identifiers for the single PUCCH resource is present, and
the plurality of spatial relation identifiers.
15 . The method of claim 14 , wherein the MAC-CE includes a first field that indicates a first spatial relation identifier of the plurality of spatial relation identifiers, and a second field that indicates a second spatial relation identifier of the plurality of spatial relation identifiers.
16 . The method of claim 14 , wherein a first spatial relation, of the multiple spatial relations, is associated with the first beam hop of the plurality of beam hops, and a second spatial relation, of the multiple spatial relations, is associated with the second beam hop of the plurality of beam hops, and
wherein the first beam hop and the second beam hop correspond to different portions of the transmission.
17 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to:
receive, via a medium access control control element (MAC-CE), an activation command to activate multiple spatial relations for a single physical uplink control channel (PUCCH) resource, the activation command comprising:
a PUCCH resource identifier identifying the single PUCCH resource to be activated,
a field indicating that information corresponding to a plurality of spatial relation identifiers for the single PUCCH resource is present, and
the plurality of spatial relation identifiers; and
communicate in the single PUCCH resource using a plurality of beam hops corresponding to the multiple spatial relations, wherein a first beam hop of the plurality of beam hops uses a first transmit power control accumulation function value based at least in part on a first closed loop index indicated by a first spatial relation of the multiple spatial relations, and a second beam hop of the plurality of beam hops uses a second transmit power control accumulation function value based at least in part on a second closed loop index indicated by a second spatial relation of the multiple spatial relations, when the first closed loop index and the second closed loop index are different.
18 . The UE of claim 17 , wherein the MAC-CE includes a first field that indicates a first spatial relation identifier of the plurality of spatial relation identifiers, and a second field that indicates a second spatial relation identifier of the plurality of spatial relation identifiers.
19 . The UE of claim 17 , wherein the one or more processors, to communicate in the single PUCCH resource, are configured to:
communicate in the single PUCCH resource when the MAC-CE is received.
20 . A network entity for wireless communication, comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to:
determine multiple spatial relations that are to be activated, for a user equipment (UE), in a single physical uplink control channel (PUCCH) resource; and
transmit, via a medium access control control element (MAC-CE), an activation command to the UE to activate the multiple spatial relations for use in a plurality of beam hops within a transmission using the single PUCCH resource, wherein a first beam hop of the plurality of beam hops uses a first transmit power control accumulation function value based at least in part on a first closed loop index indicated by a first spatial relation of the multiple spatial relations, and a second beam hop of the plurality of beam hops uses a second transmit power control accumulation function value based at least in part on a second closed loop index indicated by a second spatial relation of the multiple spatial relations, when the first closed loop index and the second closed loop index are different, and wherein the activation command comprises:
a PUCCH resource identifier identifying the single PUCCH resource to be activated,
a field indicating that information corresponding to a plurality of spatial relation identifiers for the single PUCCH resource is present, and
the plurality of spatial relation identifiers.
21 . The network entity of claim 20 , wherein the MAC-CE includes a first field that indicates a first spatial relation identifier of the plurality of spatial relation identifiers, and a second field that indicates a second spatial relation identifier of the plurality of spatial relation identifiers.
22 . The method of claim 1 , wherein a first spatial relation, of the multiple spatial relations, is associated with the first beam hop of the plurality of beam hops in the single PUCCH resource, and a second spatial relation, of the multiple spatial relations, is associated with the second beam hop of the plurality of beam hops in the single PUCCH resource, and
wherein the first beam hop corresponds to a first transmit receive point (TRP), and the second beam hop corresponds to a second TRP.
23 . The method of claim 1 , wherein the activation command comprises a field indicating an identity of a serving cell for which the MAC-CE applies.
24 . The method of claim 1 , wherein the field is set to one to indicate that the plurality of spatial relation identifiers is present.
25 . The method of claim 14 , wherein the activation command comprises a field indicating an identity of a serving cell for which the MAC-CE applies.
26 . The UE of claim 17 , wherein a first spatial relation, of the multiple spatial relations, is associated with the first beam hop of the plurality of beam hops in the single PUCCH resource, and a second spatial relation, of the multiple spatial relations, is associated with the second beam hop of the plurality of beam hops in the single PUCCH resource, and
wherein the first beam hop corresponds to a first transmit receive point (TRP), and the second beam hop corresponds to a second TRP.
27 . The UE of claim 17 , wherein the activation command comprises a field indicating an identity of a serving cell for which the MAC-CE applies.
28 . The UE of claim 17 , wherein the field is set to one to indicate that the plurality of spatial relation identifiers is present.
29 . The network entity of claim 20 , wherein the MAC-CE comprises a field indicating an identity of a serving cell for which the MAC-CE applies.
30 . The UE of claim 17 , wherein a transmit power control (TPC) command indicated for the single PUCCH resource is applied to both the first closed loop index and the second closed loop index.