Relaxation criterion for UE power saving
A method for a user equipment (UE) includes: determining that a first set of criteria is met for relaxing an evaluation; in response to the determining that the first set of criteria is met, entering a relaxation mode in which the evaluation is performed by the UE using a relaxed evaluation period, the relaxed evaluation period longer than a normal evaluation period with which the evaluation is not relaxed; determining that a second set of criteria is met for not relaxing the evaluation; and in response to the determining that the second set of criteria is met, exiting the relaxation mode to perform the evaluation using the normal evaluation period.
1 . A method comprising:
determining, based on measurements in a measurement window, that a first set of criteria is met for relaxing an evaluation;
in response to the determining that the first set of criteria is met, entering a relaxation mode in which the evaluation is performed by a user equipment (UE) using a relaxed evaluation period, the relaxed evaluation period longer than a normal evaluation period with which the evaluation is not relaxed;
determining that a second set of criteria is met for not relaxing the evaluation; and
in response to the determining that the second set of criteria is met, exiting the relaxation mode to perform the evaluation using the normal evaluation period,
wherein the measurement window is longer than the normal evaluation period.
2 . The method of claim 1 , wherein the first set of criteria comprises a set of entering relaxation criteria regarding serving cell quality, and wherein the second set of criteria comprises a set of exiting relaxation criteria regarding serving cell quality.
3 . The method of claim 2 , wherein the evaluation comprises at least one of radio link monitoring (RLM) or beam failure detection (BFD).
4 . The method of claim 3 , wherein the set of entering relaxation criteria regarding serving cell quality comprises an entering relaxation criterion for RLM and an entering relaxation criterion for BFD, and wherein the set of exiting relaxation criteria regarding serving cell quality comprises an exiting relaxation criterion for RLM and an exiting relaxation criterion for BFD.
5 . The method of claim 3 , wherein the set of entering relaxation criteria regarding serving cell quality comprises a higher one of an entering relaxation criterion for RLM and an entering relaxation criterion for BFD, and wherein the set of exiting relaxation criteria regarding serving cell quality comprises a lower one of an exiting relaxation criterion for RLM and an exiting relaxation criterion for BFD.
6 . The method of claim 2 , wherein; the evaluation comprises radio link monitoring (RLM); the set of entering relaxation criteria regarding serving cell quality comprises an entering relaxation criterion for RLM; and the set of exiting relaxation criteria regarding serving cell quality comprises an exiting relaxation criterion for RLM.
7 . The method of claim 6 , wherein the entering relaxation criterion for RLM corresponds to a threshold signal-to-noise ratio (SNR) determined by
a hypothetical block error rate (BLER) of less than 2% based on a reference channel.
8 . The method of claim 6 , wherein the exiting relaxation criterion for RLM corresponds to a less threshold SNR than the entering relaxation criterion for RLM.
9 . The method of claim 8 , wherein the exiting relaxation criterion for RLM corresponds to a threshold SNR determined by
a hypothetical BLER of less than 10% based on a reference channel.
10 . The method of claim 2 , wherein: the evaluation comprises a beam failure detection (BFD); the set of entering relaxation criteria regarding serving cell quality comprises an entering relaxation criterion for BFD; and the set of exiting relaxation criteria regarding serving cell quality comprises an exiting relaxation criterion for BFD.
11 . The method of claim 10 , wherein the entering relaxation criterion for BFD corresponds to a threshold signal-to-noise ratio (SNR) determined by
a radio link quality threshold greater than a threshold Q in_LR ; or
a hypothetical block error rate (BLER) of less than 10% based on a reference channel.
12 . The method of claim 1 , wherein the first set of criteria being met comprises a low mobility criterion specifying that the UE is in a state of low mobility, and wherein the second set of criteria being met comprises the low mobility criterion specifying that the UE is not in a state of low mobility.
13 . The method of claim 12 , wherein for the low mobility criterion, a radio-link monitoring-reference signal (RLM-RS) or a synchronization signal block (SSB) that is quasi co-located to an RLM-RS is used for calculation of reference signal received power (RSRP).
14 . A method comprising:
transmitting, to a user equipment (UE), a configuration indicating at least part of a first set of criteria for relaxing an evaluation, such that the UE is configured to, responsive to determining, based on measurements in a measurement window, that the first set of criteria is met, enter a relaxation mode in which the evaluation is performed by the UE using a relaxed evaluation period, the relaxed evaluation period longer than a normal evaluation period with which the evaluation is not relaxed and the measurement window being longer than the normal evaluation period; and
transmitting, to the UE, a configuration indicating at least part of a second set of criteria for not relaxing the evaluation, such that the UE is configured to, responsive to determining that the second set of criteria is met, exit the relaxation mode to perform the evaluation using the normal evaluation period.
15 . The method of claim 14 , wherein the first set of criteria comprises a set of entering relaxation criteria regarding serving cell quality and the second set of criteria comprises a set of exiting relaxation criteria regarding serving cell quality, and
wherein the evaluation comprises at least one of radio link monitoring (RLM) or beam failure detection (BFD).
16 . One or more non-transitory, computer-readable media having instructions that, when executed, cause processing circuitry to:
determine, based on measurements in a measurement window, that a first set of criteria is met for relaxing an evaluation;
in response to the determination that the first set of criteria is met, enter a relaxation mode in which the evaluation is performed by a user equipment (UE) using a relaxed evaluation period, the relaxed evaluation period longer than a normal evaluation period with which the evaluation is not relaxed;
determine that a second set of criteria is met for not relaxing the evaluation; and
in response to the determination that the second set of criteria is met, exiting the relaxation mode to perform the evaluation using the normal evaluation period,
wherein the measurement window is longer than the normal evaluation period.
17 . The one or more non-transitory, computer-readable of claim 16 , wherein the first set of criteria comprises a set of entering relaxation criteria regarding serving cell quality, and wherein the second set of criteria comprises a set of exiting relaxation criteria regarding serving cell quality.
18 . The one or more non-transitory, computer-readable media of claim 17 , wherein the evaluation comprises at least one of radio link monitoring (RLM) or beam failure detection (BFD).
19 . The one or more non-transitory, computer-readable media of claim 17 , wherein: the evaluation comprises radio link monitoring (RLM); the set of entering relaxation criteria regarding serving cell quality comprises an entering relaxation criterion for RLM; and the set of exiting relaxation criteria regarding serving cell quality comprises an exiting relaxation criterion for RLM.
20 . The one or more non-transitory, computer-readable media of claim 17 , wherein an entering relaxation criterion of the set of entering relaxation criteria regarding serving cell quality corresponds to a threshold signal-to-noise ratio (SNR) determined by a hypothetical block error rate (BLER) of less than 2% based on a reference channel.