Detecting stationary devices for RRM relaxation
The UE may perform a measurement of downlink reference signals from a serving cell and at least one neighbor cell and skip one or more RRM measurements based on a comparison of the measurement for at least one round of measurements and a threshold value. The measurement of the downlink reference signals may include a measurement of a Doppler shift, a measurement of a positioning reference signal, or a measurement of a reception timing drift based on the downlink reference signals.
1. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
perform a measurement of at least one of:
Doppler shift of a first set of downlink reference signals from a serving cell,
at least one positioning reference signal, or
reception timing drift of a second set of downlink reference signals from its serving and neighbor cells; and
skip one or more radio resource management (RRM) measurements based on the measurement for at least one round of measurements of the at least one of the Doppler shift, the at least one positioning reference signal, or the reception timing drift meeting a threshold measurement value associated with a stationary UE and RRM measurement relaxation that includes skipping of the one or more RRM measurements.
2. The apparatus of claim 1 , wherein the at least one processor is further configured to:
receive, from a network entity, a configuration of at least one of the threshold measurement value or a number of rounds of measurements for the RRM measurement relaxation.
3. The apparatus of claim 1 , wherein each round of measurements comprises the measurement of the serving cell and one or more neighbor cells monitored by the UE.
4. The apparatus of claim 1 , wherein the measurement comprises a Doppler shift measurement for the first set of downlink reference signals, and the one or more RRM measurements are skipped based on the Doppler shift measurement for a subset of beams meeting the threshold measurement value during the at least one round of measurements.
5. The apparatus of claim 4 , wherein the at least one processor is further configured to:
measure one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
6. The apparatus of claim 1 , wherein the measurement comprises the measurement of a set of positioning reference signals from multiple cells including the serving cell to estimate a location of the UE, and the one or more RRM measurements are skipped based on the location of the UE changing by less than the threshold measurement value within a time interval.
7. The apparatus of claim 1 , wherein the measurement comprises the measurement of the reception timing drift based on a downlink reference signal from each of multiple cells including the serving cell and one or more neighbor cells, and the one or more RRM measurements are skipped based on the reception timing drift for a subset of beams being less than the threshold measurement value over the at least one round of measurements.
8. The apparatus of claim 7 , wherein the at least one processor is further configured to:
measure one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
9. The apparatus of claim 1 , wherein the at least one processor is further configured to:
transmit, to a network entity, an indication of UE's capability to skip one or more RRM measurements based on a comparison of the measurement for the at least one round of measurements and the threshold measurement value.
10. The apparatus of claim 9 , wherein the indication of the UE's capability is transmitted to the network entity via at least one of an RRC connection request signal or an RRC connection setup complete signal.
11. The apparatus of claim 1 , further comprising:
at least one transceiver coupled to the at least one processor, wherein the at least one processor is configured to receive at least one of the first set of downlink reference signals, the at least one positioning signal, or the second set of downlink reference signals via the at least one transceiver.
12. A method of wireless communication at a user equipment (UE), comprising:
performing a measurement of at least one of:
Doppler shift of a first set of downlink reference signals from a serving cell,
at least one positioning reference signal, or
reception timing drift of a second set of downlink reference signals from its serving and neighbor cells; and
skipping one or more radio resource management (RRM) measurements based on a comparison of the measurement for at least one round of measurements of the at least one of the Doppler shift, the at least one positioning reference signal, or the reception timing drift meeting a threshold measurement value associated with a stationary UE and RRM measurement relaxation that includes skipping of the one or more RRM measurements.
13. The method of claim 12 , further comprising:
receiving, from a network entity, a configuration of at least one of the threshold measurement value or a number of rounds of measurements for the RRM measurement relaxation.
14. The method of claim 12 , wherein each round of measurements comprises the measurement of the serving cell and one or more neighbor cells monitored by the UE.
15. The method of claim 12 , wherein the measurement comprises a Doppler shift measurement for the first set of downlink reference signals, and the one or more RRM measurements are skipped based on the Doppler shift measurement for a subset of beams meeting the threshold measurement value during the at least one round of measurements.
16. The method of claim 15 , further comprising:
measuring one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
17. The method of claim 12 , wherein the measurement comprises the measurement of a set of positioning reference signals from multiple cells including the serving cell to estimate a location of the UE, and the one or more RRM measurements are skipped based on the location of the UE changing by less than the threshold measurement value within a time interval.
18. The method of claim 12 , wherein the measurement comprises the measurement of the reception timing drift based on a downlink reference signal from each of multiple cells including the serving cell and one or more neighbor cells, and the one or more RRM measurements are skipped based on the reception timing drift for a subset of beams being less than the threshold measurement value over the at least one round of measurements.
19. The method of claim 18 , further comprising:
measuring one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
20. The method of claim 12 , further comprising:
transmitting, to a network entity, an indication of UE's capability to skip one or more RRM measurements based on the comparison of the measurement for the at least one round of measurements and the threshold measurement value.
21. The method of claim 20 , wherein the indication of the UE's capability is transmitted to the network entity via at least one of an RRC connection request signal or an RRC connection setup complete signal.
22. A non-transitory computer-readable medium storing computer executable code for wireless communication at a user equipment (UE), where the code when executed by at least one processor causes the at least one processor to:
perform a measurement of at least one of:
Doppler shift of a first set of downlink reference signals from a serving cell, at least one positioning reference signal, or
reception timing drift of a second set of downlink reference signals from its serving and neighbor cells; and
skip one or more radio resource management (RRM) measurements based on the measurement for at least one round of measurements of the at least one of the Doppler shift, the at least one positioning reference signal, or the reception timing drift meeting a threshold measurement value associated with a stationary UE and RRM measurement relaxation that includes skipping of the one or more RRM measurements.
23. The non-transitory computer-readable medium of claim 22 , wherein the code when executed by the at least one processor further causes the at least one processor to:
receive, from a network entity, a configuration of at least one of the threshold measurement value or a number of rounds of measurements for the RRM measurement relaxation.
24. The non-transitory computer-readable medium of claim 22 , wherein the measurement comprises a Doppler shift measurement for the first set of downlink reference signals, and the one or more RRM measurements are skipped based on the Doppler shift measurement for a subset of beams meeting the threshold measurement value during the at least one round of measurements.
25. The non-transitory computer-readable medium of claim 24 , wherein the code when executed by the at least one processor further causes the at least one processor to:
measure one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
26. The non-transitory computer-readable medium of claim 22 , wherein the measurement comprises the measurement of a set of positioning reference signals from multiple cells including the serving cell to estimate a location of the UE, and the one or more RRM measurements are skipped based on the location of the UE changing by less than the threshold measurement value within a time interval.
27. The non-transitory computer-readable medium of claim 22 , wherein the measurement comprises the measurement of the reception timing drift based on a downlink reference signal from each of multiple cells including the serving cell and one or more neighbor cells, and the one or more RRM measurements are skipped based on the reception timing drift for a subset of beams being less than the threshold measurement value over the at least one round of measurements.
28. The non-transitory computer-readable medium of claim 27 , wherein the code when executed by the at least one processor further causes the at least one processor to:
measure one or more downlink reference signals for a plurality of beams, wherein the plurality of beams comprises the subset of beams having a highest measured quality among the plurality of beams.
29. The non-transitory computer-readable medium of claim 22 , wherein the code when executed by the at least one processor further causes the at least one processor to:
transmit, to a network entity, an indication of UE's capability to skip one or more RRM measurements based on a comparison of the measurement for the at least one round of measurements and the threshold measurement value.
30. An apparatus for wireless communication at a user equipment (UE), comprising:
means for performing a measurement of at least one of:
Doppler shift of a first set of downlink reference signals from a serving cell,
at least one positioning reference signal, or
reception timing drift of a second set of downlink reference signals from its serving and neighbor cells; and
means for skipping one or more radio resource management (RRM) measurements based on a comparison of the measurement for at least one round of measurements of the at least one of the Doppler shift, the at least one positioning reference signal, or the reception timing drift meeting a threshold measurement value associated with a stationary UE and RRM measurement relaxation that includes skipping of the one or more RRM measurements.