Power control information for common TCI states
Certain aspects of the present disclosure provide techniques for providing power control parameters for channels and/or reference signals sharing a same common transmission configuration indicator (TCI) state. A method that may be performed by a user equipment (UE) includes measuring a path loss at a user equipment, receiving, from a network, a plurality of power control configurations, wherein: each power control configuration of the plurality of power control configurations comprises a respective plurality of power control parameters, and each power control configuration of the plurality of power control configurations applies to a respective uplink channel or reference signal object associated with a common transmission configuration indication (TCI) state, and transmitting at least one uplink channel or reference signal object at a transmission power that is based on the measured path loss and at least one of the power control configurations of the plurality of power control configurations.
1 . A user equipment (UE), comprising:
one or more memories comprising executable instructions; and
one or more processors configured to execute the executable instructions and cause the UE to:
receive, from a network, a plurality of power control configurations, wherein:
each power control configuration of the plurality of power control configurations comprises a respective plurality of power control parameters;
each power control configuration of the plurality of power control configurations applies to a respective uplink channel or reference signal object associated with a common transmission configuration indication (TCI) state; and
each respective power control configuration of the plurality of power control configurations depends on a respective common TCI state of a plurality of common TCI states associated with that respective power control configuration; and
at least one power control configuration of the plurality of power control configurations is configured implicitly based on:
a periodic uplink beam reference signal configured for the respective common TCI state associated with the at least one power control configuration; and
a radio resource control (RRC) flag in an RRC message received by the UE indicating a separate pathloss reference signal not being signaled by the network; and
transmit at least one uplink channel or reference signal object at a transmission power that is based on a measured path loss and at least one of the power control configurations of the plurality of power control configurations.
2 . The UE of claim 1 , wherein each respective power control configuration of the plurality of power control configurations is configured in a same information element (IE) as the respective common TCI state associated with the respective power control configuration.
3 . The UE of claim 1 , wherein:
each respective power control configuration of the plurality of power control configurations is configured in a different information element (IE) than the respective common TCI state associated with the respective power control configuration, and
for each respective power control configuration of the plurality of power control configurations, a preconfigured relationship associates an IE of that respective power control configuration with an IE of the respective common TCI state associated with that respective power control configuration.
4 . The UE of claim 1 , wherein:
each respective power control configuration of the plurality of power control configurations is configured in a different information element (IE) than the respective common TCI state associated with the respective power control configuration, and
for each respective power control configuration of the plurality of power control configurations, a dynamically configured relationship associates an IE of that respective power control configuration with an IE of the respective common TCI state associated with that respective power control configuration.
5 . The UE of claim 4 , wherein the one or more processors are further configured to cause the UE to receive one or more a medium access control control elements (MAC-CEs) or downlink control information (DCI) from the network configured to dynamically associate the IE of each respective power control configuration of the plurality of power control configurations with the IE of the respective common TCI state associated with that respective power control configuration.
6 . The UE of claim 1 , wherein:
each respective uplink channel or reference signal object defines a type of physical uplink channel for the respective uplink channel or reference signal object, and
the type of physical uplink channel is one of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), or a physical uplink shared channel (PUSCH).
7 . The UE of claim 1 , wherein:
each respective uplink channel or reference signal object defines a physical uplink resource for the respective uplink channel or reference signal object, and
the physical uplink resource is one of a sounding reference signal (SRS) resource or a physical uplink control channel (PUCCH) resource.
8 . The UE of claim 1 , wherein:
each respective uplink channel or reference signal object defines a physical uplink resource set for the respective uplink channel or reference signal object, and
the physical uplink resource set is one of a sounding reference signal (SRS) resource set or a physical uplink control channel (PUCCH) resource set.
9 . The UE of claim 1 , wherein the common TCI state indicates a common TCI state for at least one downlink channel or reference signal object and at least one uplink channel or reference signal object.
10 . The UE of claim 1 , wherein the common TCI state indicates a common TCI state for at least a first uplink channel or reference signal object and a second uplink channel or reference signal object.
11 . A method for wireless communication by a user equipment (UE), comprising:
receiving, from a network, a plurality of power control configurations, wherein:
each power control configuration of the plurality of power control configurations comprises a respective plurality of power control parameters;
each power control configuration of the plurality of power control configurations applies to a respective uplink channel or reference signal object associated with a common transmission configuration indication (TCI) state; and
each respective power control configuration of the plurality of power control configurations depends on a respective common TCI state of a plurality of common TCI states associated with that respective power control configuration; and
at least one power control configuration of the plurality of power control configurations is configured implicitly based on:
a periodic uplink beam reference signal configured for the respective common TCI state associated with the at least one power control configuration; and
a radio resource control (RRC) flag in an RRC message received by the UE indicating a separate pathloss reference signal not being signaled by the network; and
transmitting at least one uplink channel or reference signal object at a transmission power that is based on a measured path loss and at least one of the power control configurations of the plurality of power control configurations.
12 . The method of claim 11 , wherein each respective power control configuration of the plurality of power control configurations is configured in a same information element (IE) as the respective common TCI state associated with the respective power control configuration.