Periodic reference signals in a power saving mode
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a power saving mode of the base station for communicating with a base station. The UE may communicate with the base station, with the communicating including transmitting one or more periodic reference signals having a configuration that is based at least in part on the power saving mode of the base station, or receiving the one or more periodic reference signals having the configuration that is based at least in part on the power saving mode of the base station. Numerous other aspects are provided.
1. A user equipment (UE) for wireless communication, comprising:
a processing system that includes one or more processors; and
one or more memories communicatively coupled with the one or more processors, the processing system configured to cause the UE to:
receive an indication of a first power saving mode of a network entity;
communicate with the network entity, the communication comprising:
a transmission of one or more periodic reference signals having a first configuration associated with the first power saving mode of the network entity, the first configuration being associated with a time gap between repetitions of the one or more periodic reference signals, or
a reception of the one or more periodic reference signals having the first configuration; and
receive an indication of a second power saving mode of the network entity having a second configuration associated with one or more of:
cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the first power saving mode of the network entity, or
a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the first power saving mode of the network entity.
2. The UE of claim 1 , wherein the one or more periodic reference signals comprise one or more of channel state information reference signals (CSI-RSs) or sounding reference signals (SRSs).
3. The UE of claim 1 , wherein the configuration is further associated with one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals, or
a repetition pattern of the one or more periodic reference signals.
4. The UE of claim 1 , wherein the indication of the first power saving mode of the network entity comprises one or more of:
an indication to change to the first power saving mode of the network entity from a previously active power saving mode of the network entity,
an indication to activate the one or more periodic reference signals, or
an indication to change the sampling factor of the one or more periodic reference signals to another sampling factor that is different from the sampling factor associated with the first power saving mode of the network entity.
5. The UE of claim 1 , wherein the processing system, to cause the UE to receive the indication of the first power saving mode of the network entity, is configured to cause the UE to receive one or both of:
an explicit indication, or
an indication of a change of the first power saving mode of the network entity relative to another power saving mode of the network entity.
6. The UE of claim 1 , wherein:
the first configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the first power saving mode of the network entity, or
the first configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the first power saving mode of the network entity.
7. The UE of claim 1 , wherein the processing system is further configured to cause the UE to:
receive an indication to associate, with the first power saving mode of the network entity, one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals,
a repetition pattern of the one or more periodic reference signals, or
the time gap.
8. The UE of claim 1 , wherein the first configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation of the set being based at least in part on one or more ports associated with the one or more periodic reference signals.
9. The UE of claim 1 , wherein the first configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a channel state information reference signal (CSI-RS) report associated with the one or more periodic reference signals.
10. The UE of claim 1 , wherein the processing system is further configured to cause the UE to:
transmit a report associated with the reception of the one or more periodic reference signals, wherein report elements included in the report are based at least in part on the first power saving mode of the network entity.
11. The UE of claim 10 , wherein the processing system is further configured to cause the UE to:
receive an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements being selectable for inclusion in the report based at least in part on the first power saving mode of the network entity.
12. A network entity for wireless communication, comprising:
a processing system that includes one or more processors; and
one or more memories communicatively coupled with the one or more processors, the processing system configured to cause the network entity to:
transmit an indication of a first power saving mode of the network entity for communicating with a user equipment (UE);
communicate with the UE, the communication comprising:
a transmission of one or more periodic reference signals having a first configuration associated with the first power saving mode of the network entity, the first configuration being associated with a time gap between repetitions of the one or more periodic reference signals, or
a reception of the one or more periodic reference signals having the first configuration; and
transmit an indication of a second power saving mode of the network entity having a second configuration associated with one or more of:
cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the first power saving mode of the network entity, or
a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the first power saving mode of the network entity.
13. The network entity of claim 12 , wherein the one or more periodic reference signals comprise one or more of channel state information reference signals (CSI-RSs) or sounding reference signals (SRSs).
14. The network entity of claim 12 , wherein the first configuration is further associated with one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals, or
a repetition pattern of the one or more periodic reference signals.
15. The network entity of claim 12 , wherein the indication of the first power saving mode of the network entity comprises one or more of:
an indication to change to the first power saving mode of the network entity from a previously active power saving mode of the network entity,
an indication to activate the one or more periodic reference signals, or
an indication to change the sampling factor of the one or more periodic reference signals to another sampling factor that is different from a the factor associated with the first power saving mode of the network entity.
16. The network entity of claim 12 , wherein the processing system, to cause the network entity to transmit the indication of the first power saving mode of the network entity, is configured to cause the network entity to:
an explicit indication, or
an indication of a change of the first power saving mode of the network entity relative to another power saving mode of the network entity.
17. The network entity of claim 12 , wherein:
the first configuration is associated with a comb level of the one or more periodic reference signals that is based at least in part on the first power saving mode of the network entity, or
the first configuration is associated with a comb offset of the one or more periodic reference signals that is based at least in part on the first power saving mode of the network entity.
18. The network entity of claim 12 , wherein the processing system is further configured to cause the network entity to:
transmit an indication to associate, with the first power saving mode of the network entity, one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals,
a repetition pattern of the one or more periodic reference signals, or
the time gap.
19. The network entity of claim 12 , wherein the first power saving mode of the network entity is based at least in part on one or more of:
a number of UEs connected with the network entity,
an amount of traffic handled by the network entity,
a type of traffic handled by the network entity,
channel conditions for channels between the network entity and the UE, or
communication channels for the UEs connected with the network entity.
20. The network entity of claim 12 , wherein the first configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation of the set being based at least in part on one or more ports associated with the one or more periodic reference signals.
21. The network entity of claim 12 , wherein the first configuration is associated with a set of one or more candidate values of a timing offset between a symbol allocated for receiving the one or more periodic reference signals and a first uplink transmission symbol scheduled for transmitting a channel state information reference signal (CSI-RS) report associated with the one or more periodic reference signals.
22. The network entity of claim 12 , wherein the processing system is further configured to cause the network entity to:
receive a report associated with the transmission of the one or more periodic reference signals, wherein contents of the report are based at least in part on the first power saving mode of the network entity.
23. The network entity of claim 22 , wherein the processing system is further configured to cause the network entity to:
transmit an indication of a report configuration that indicates candidate sets of report elements, the candidate sets of report elements being selectable for inclusion in the report based at least in part on the first power saving mode of the network entity.
24. A method of wireless communication performed by a user equipment (UE), comprising:
receiving an indication of a first power saving mode of a network entity;
communicating with the network entity by:
transmitting one or more periodic reference signals having a first configuration that is associated with the first power saving mode of the network entity, the first configuration being associated with a time gap between repetitions of the one or more periodic reference signals, or
receiving the one or more periodic reference signals having the first configuration; and
receiving an indication of a second power saving mode of the network entity having a second configuration associated with one or more of:
cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the first power saving mode of the network entity, or
a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the first power saving mode of the network entity.
25. The method of claim 24 , wherein the first configuration is further associated with one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals, or
a repetition pattern of the one or more periodic reference signals.
26. The method of claim 24 , further comprising:
receiving an indication to associate, with the first power saving mode of the network entity, one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals,
a repetition pattern of the one or more periodic reference signals, or
the time gap.
27. The method of claim 24 , wherein the first configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation of the set being based at least in part on one or more ports associated with the one or more periodic reference signals.
28. A method of wireless communication performed by a network entity, comprising:
transmitting an indication of a first power saving mode of the network entity for communicating with a user equipment (UE);
communicating with the UE by:
transmitting one or more periodic reference signals having a first configuration that is associated with the first power saving mode of the network entity, the first configuration being associated with a time gap between repetitions of the one or more periodic reference signals, or
receiving the one or more periodic reference signals having the first configuration; and
transmitting an indication of a second power saving mode of the network entity having a second configuration associated with one or more of:
cancelation of one or more occasions of the one or more periodic reference signals that were not canceled in the first power saving mode of the network entity, or
a sampling factor of the one or more periodic reference signals that is different from a sampling factor associated with the first power saving mode of the network entity.
29. The method of claim 28 , wherein the first configuration is associated with one or more of:
a periodicity of the one or more periodic reference signals,
a repetition number of the one or more periodic reference signals, or
a repetition pattern of the one or more periodic reference signals.
30. The method of claim 28 , wherein the first configuration is associated with cancelation of a set of the one or more periodic reference signals, the cancelation of the set being based at least in part on one or more ports associated with the one or more periodic reference.