Adaptive configured grant for power saving
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be receive a grant configuration including multiple set of parameters, and the UE may select a set of parameters from the configured grant based on a channel condition. In some examples, the UE may be configured to signal to a network (e.g., a base station) the selected set of parameters and their corresponding parameter values. For example, the UE may be configured to signal the selected set of parameters over semi-static signaling (e.g., radio resource control (RRC) messaging) or dynamic signaling (e.g., medium access control-control element (MAC-CE) messaging, uplink control information (UCI) messaging, or the like). By configuring the UE with multiple set of parameters, the UE may adapt to changing channel conditions, which may provide higher reliability and lower latency for wireless communications, as well as reduce power consumption for the UE.
1. A method for wireless communication at a user equipment (UE), comprising:
receiving a configuration comprising multiple sets of parameters for a configured grant transmission of semi-persistent uplink data;
selecting a set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data based at least in part on a channel condition;
transmitting, to a base station, the configured grant transmission of the semi-persistent uplink data using the selected set of one or more parameters;
wherein transmitting the indication comprises:
transmitting, in a medium access control-control element message, the indication of the one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data; and
applying the one or more parameters associated with the selected set of one or more parameters for a subsequent configured grant transmission of subsequent semi-persistent uplink data based at least in part on transmitting, in the medium access control-control element message, the indication of the one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
2. The method of claim 1 , further comprising:
transmitting an indication of one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
3. The method of claim 2 , wherein the indication identifies one or more parameter values of the one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
4. The method of claim 2 , wherein the indication identifies the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
5. The method of claim 2 , wherein the one or more parameters comprise a repetition factor value, a modulation and coding scheme index value, a transport block size index value, a number of layers, a number of antenna ports, a precoding matrix index value, or a combination thereof.
6. The method of claim 2 , wherein transmitting the indication comprises:
transmitting the indication of the one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of on an uplink channel using one or more uplink resources.
7. The method of claim 6 , wherein the one or more uplink resources comprise one or more preconfigured physical uplink control channel resources associated with one or more grant resources.
8. The method of claim 7 , wherein the one or more uplink resources and the one or more grant resources comprise a same periodicity.
9. The method of claim 7 , wherein the one or more uplink resources and the one or more grant resources comprise a different periodicity.
10. The method of claim 1 , further comprising:
multiplexing the medium access control-control element message with an uplink transmission, wherein transmitting, in the medium access control-control element message, the indication of the one or more parameters associated with the selected set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data is based at least in part on multiplexing the medium access control-control element message with the uplink transmission.
11. The method of claim 2 , wherein transmitting the indication comprises:
transmitting, in a radio resource control message, the indication of the one or more parameters associated with the selected set of one or more parameters for the configured grant transmission of the semi-persistent uplink data.
12. The method of claim 1 , further comprising:
transmitting, to the base station, a report identifying a channel degradation level based at least in part on the channel condition; and
receiving, from the base station via a downlink channel, a message to select the set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data based at least in part on the report, the set of one or more parameters comprising a periodicity, one or more offsets for one or more configured grants, a repetition factor value, or a number of slots allocated in a configured grant, or any combination thereof.
13. The method of claim 12 , wherein the message comprises a medium access control-control element message, a radio resource control message, or a downlink control information, or a combination thereof.
14. A method for wireless communication at a user equipment (UE), comprising:
receiving a configuration comprising multiple sets of parameters for a configured grant transmission of semi-persistent uplink data;
selecting a set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data based at least in part on a channel condition;
transmitting, to a base station, the configured grant transmission of the semi-persistent uplink data using the selected set of one or more parameters; and
receiving, from the base station via a downlink channel, a message comprising downlink parameters and uplink parameters associated with the configured grant transmission of the semi-persistent uplink data for an extended reality application, wherein selecting the set of one or more parameters for the configured grant transmission of the semi-persistent uplink data is based at least in part on the downlink parameters and the uplink parameters.
15. The method of claim 14 , wherein the downlink parameters or the uplink parameters, or both, comprise a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.
16. A method for wireless communication at a base station, comprising:
transmitting, to a user equipment (UE), a configuration comprising multiple sets of parameters for a configured grant transmission of semi-persistent uplink data;
receiving the configured grant transmission of the semi-persistent uplink data from the UE, the configured grant transmission of the semi-persistent uplink data associated with a set of one or more parameters selected from the multiple sets of parameters;
receiving an indication of one or more parameters associated with the set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data; and
wherein receiving the indication comprises:
receiving, in a medium access control-control element message, the indication of the one or more parameters associated with the set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
17. The method of claim 16 , wherein the indication identifies one or more parameter values of the one or more parameters associated with the set of one or more parameters for the configured grant transmission of the semi-persistent uplink data.
18. The method of claim 16 , wherein the indication identifies the set of one or more parameters from the multiple sets of parameters for the configured grant transmission of the semi-persistent uplink data.
19. The method of claim 16 , wherein the one or more parameters comprise a repetition factor value, a modulation and coding scheme index value, a transport block size index value, a number of layers, a number of antenna ports, a precoding matrix index value, or a combination thereof.
20. The method of claim 16 , wherein receiving the indication comprises:
receiving, in a radio resource control message, the indication of the one or more parameters associated with the set of one or more parameters from the multiple sets of parameters for the configured grant transmission of.
21. The method of claim 16 , further comprising:
receiving, from the UE, a report identifying a channel degradation level; and
transmitting, to the UE via a downlink channel, a message to select the set of one or more parameters for the configured grant transmission of the semi-persistent uplink data based at least in part on the report, the set of one or more parameters comprising a periodicity, one or more offsets for one or more configured grants, a repetition factor value, or a number of slots allocated in a configured grant, or any combination thereof.
22. The method of claim 21 , wherein the message comprises a medium access control-control element message, a radio resource control message, or a downlink control information, or a combination thereof.
23. A method for wireless communication at a base station, comprising:
transmitting, to a user equipment (UE), a configuration comprising multiple sets of parameters for a configured grant transmission of semi-persistent uplink data;
receiving the configured grant transmission of the semi-persistent uplink data from the UE, the configured grant transmission of the semi-persistent uplink data associated with a set of one or more parameters selected from the multiple sets of parameters; and
transmitting, to the UE via a downlink channel, a message comprising downlink parameters and uplink parameters associated with the configured grant transmission of the semi-persistent uplink data for an extended reality application.
24. The method of claim 23 , wherein the downlink parameters or the uplink parameters, or both, comprise a discontinuous reception cycle, a grant periodicity, a semi-persistent scheduling periodicity, a scheduling request periodicity, or a combination thereof.