Pathloss determination for beam management sounding reference signals
A wireless device receives configuration parameters indicating a sounding reference signal (SRS) resource set that is associated with a pathloss reference signal (PL-RS) and comprises a first SRS resource. A downlink control information is received indicating a transmission configuration indicator (TCI) state for a physical shared data channel (PUSCH). A transmit power for the PUSCH is determined based on the PL-RS, in response to: the TCI state being associated with the first SRS resource of the SRS resource set, and the SRS resource set being configured for beam management. A transport block is transmitted, via the PUSCH, based on the transmit power and using the TCI state.
1. A method comprising:
receiving, by a wireless device, configuration parameters indicating a sounding reference signal (SRS) resource set that is associated with a pathloss reference signal (PL-RS) and comprises a first SRS resource and a second SRS resource;
receiving a downlink control information indicating a transmission configuration indicator (TCI) state for a physical shared data channel (PUSCH);
determining a transmit power for the PUSCH based on the PL-RS, in response to:
the TCI state being associated with the first SRS resource of the SRS resource set; and
the SRS resource set being configured for beam management; and
transmitting, based on the transmit power and using the TCI state, a transport block via the PUSCH.
2. The method of claim 1 , wherein the SRS resource set comprises SRS resources having respective SRS resource indexes, and wherein the PL-RS is determined further based on the PL-RS being associated with a SRS resource, of the SRS resources, having the lowest index.
3. The method of claim 1 , wherein:
the second SRS resource is associated with the PL-RS; and
the first SRS resource is associated with a first PL-RS.
4. The method of claim 3 , wherein the determining the transmit power is based on the PL-RS and not the first PL-RS associated with the first SRS resource.
5. The method of claim 1 , wherein the TCI state being associated with the first SRS resource comprises the first SRS resource being a spatial relation RS of the TCI state.
6. The method of claim 1 , wherein the TCI state being associated with the first SRS resource comprises the first SRS resource being a quasi-colocation RS of the TCI state.
7. The method of claim 1 , wherein the SRS resource set being configured for beam management comprises the SRS resource set being configured, by a radio resource control (RRC) message, to be used for beam management for uplink by the wireless device.
8. The method of claim 7 , wherein the configuration parameters are received in an RRC message that indicates that the SRS resource set is configured for beam management for uplink by the wireless device.
9. The method of claim 1 , wherein the TCI state is a common TCI state or a unified TCI state.
10. The method of claim 9 , wherein the common TCI state or the unified TCI state is applied by the wireless device for multiple uplink channels or uplink signals.
11. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive configuration parameters indicating a sounding reference signal (SRS) resource set that is associated with a pathloss reference signal (PL-RS) and comprises a first SRS resource and a second SRS resource;
receive a downlink control information indicating a transmission configuration indicator (TCI) state for a physical shared data channel (PUSCH);
determine a transmit power for the PUSCH based on the PL-RS, in response to:
the TCI state being associated with the first SRS resource of the SRS resource set; and
the SRS resource set being configured for beam management; and
transmit, based on the transmit power and using the TCI state, a transport block via the PUSCH.
12. The wireless device of claim 11 , wherein the SRS resource set comprises SRS resources having respective SRS resource indexes, and wherein the PL-RS is determined further based on the PL-RS being associated with a SRS resource, of the SRS resources, having the lowest index.
13. The wireless device of claim 11 , wherein:
the second SRS resource is associated with the PL-RS; and wherein
the first SRS resource is associated with a first PL-RS.
14. The wireless device of claim 13 , wherein the determination of the transmit power is based on the PL-RS and not the first PL-RS associated with the first SRS resource.
15. The wireless device of claim 11 , wherein the TCI state being associated with the first SRS resource comprises the first SRS resource comprising a spatial relation RS of the TCI state.
16. The wireless device of claim 11 , wherein the TCI state being associated with the first SRS resource comprises the first SRS resource comprising a quasi-colocation RS of the TCI state.
17. The wireless device of claim 11 , wherein the SRS resource set being configured for beam management comprises the SRS resource set being configured, by a radio resource control (RRC) message, to be used for beam management for uplink by the wireless device.
18. The wireless device of claim 17 , wherein the configuration parameters are received in an RRC message that indicates that the SRS resource set is configured for beam management for uplink by the wireless device.
19. The wireless device of claim 11 , wherein the TCI state is a common TCI state or a unified TCI state, and wherein the common TCI state or the unified TCI state is applied by the wireless device for multiple uplink channels or multiple uplink signals.
20. A system comprising:
a base station comprising one or more first processors and first memory storing first instructions that, when executed by the one or more first processors, cause the base station to:
transmit configuration parameters indicating a sounding reference signal (SRS) resource set that is associated with a pathloss reference signal (PL-RS) and comprises a first SRS resource and a second SRS resource;
transmit a downlink control information (DCI) indicating a transmission configuration indicator (TCI) state for a physical shared data channel (PUSCH); and
receive, based on a transmit power and using the TCI state, a transport block via the PUSCH; and
a wireless device comprising one or more second processors and second memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to:
receive the configuration parameters;
receive the DCI;
determine the transmit power for the PUSCH based on the PL-RS, in response to:
the TCI state being associated with the first SRS resource of the SRS resource set; and
the SRS resource set being configured for beam management; and
transmit, based on the determined transmit power and using the TCI state, the transport block via the PUSCH.