Hybrid measurement for sidelink relay selection
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain, for each of one or more sidelink relay candidates, a measurement of a sidelink signal and a measurement of a Uu signal to a base station. The UE may select a sidelink relay candidate from among the one or more sidelink relay candidates based at least in part on a combination of the measurement of the sidelink signal and the measurement of the Uu signal for each sidelink relay candidate. The UE may transmit, to the selected sidelink relay candidate, a message that is to be relayed to the base station. Numerous other aspects are described.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
obtaining, for each of one or more sidelink relay candidates, a measurement of a sidelink signal and a measurement of a signal from a respective sidelink relay candidate of the one or more sidelink relay candidates to a base station;
applying an offset to the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on the signal being in a different frequency band than the sidelink signal;
selecting a sidelink relay candidate from among the one or more sidelink relay candidates based at least in part on a combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for each sidelink relay candidate of the one or more sidelink relay candidates; and
transmitting, to the selected sidelink relay candidate, a message that is to be relayed to the base station.
2 . The method of claim 1 , wherein obtaining the measurement of the sidelink signal for each sidelink relay candidate of the one or more sidelink relay candidates includes measuring the sidelink signal within a sidelink measurement gap.
3 . The method of claim 1 , wherein obtaining the measurement of the sidelink signal for the respective sidelink relay candidate includes using a filter to determine a time domain average of the sidelink signals from the one or more sidelink relay candidates.
4 . The method of claim 1 , wherein obtaining the measurement of the signal that is from the respective sidelink relay candidate to the base station includes measuring the signal that is from the respective sidelink relay candidate to the base station outside of a sidelink measurement gap.
5 . The method of claim 1 , wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station includes one or more of a reference signal received power, a reference signal received quality, a signal-to-interference-plus-noise ratio, or a reference signal strength indicator for the signal from the respective sidelink relay candidate to the base station.
6 . The method of claim 1 , wherein obtaining the measurement of the signal that is from the respective sidelink relay candidate to the base station includes measuring cross-link interference (CLI) based at least in part on a CLI configuration received from the base station.
7 . The method of claim 1 , wherein obtaining the measurement of the signal that is from the respective sidelink relay candidate to the base station includes measuring cross-link interference (CLI) based at least in part on a CLI configuration received from another UE via a sidelink.
8 . The method of claim 7 , wherein the CLI configuration includes uplink transmission occasions or resources of the other UE.
9 . The method of claim 1 , further comprising:
receiving an identity of each respective sidelink relay candidate in an inter-UE measurement resource configuration for measuring the signal that is from the respective sidelink relay candidate to the base station; and
associating an inter-UE measurement resource with the respective sidelink relay candidate based at least in part on the identity, wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station includes a measurement of the inter-UE resource.
10 . The method of claim 1 , further comprising:
determining the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on jointly processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station in a same filter.
11 . The method of claim 1 , further comprising:
determining the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and using a maximum of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for sidelink relay candidate selection.
12 . The method of claim 1 , further comprising:
determining the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and using a minimum of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for sidelink relay candidate selection.
13 . The method of claim 1 , further comprising:
determining the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on separately processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and selecting the sidelink relay candidate based at least in part on a weighted average of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station.
14 . The method of claim 1 , wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station is in a different frequency band than the measurement of the sidelink signal, and wherein the combination includes a smaller filtering coefficient or weighting factor for the measurement of the signal that is from the respective sidelink relay candidate to the base station than for the measurement of the sidelink signal.
15 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to cause the UE to:
obtain, for each of one or more sidelink relay candidates, a measurement of a sidelink signal and a measurement of a signal from a respective sidelink relay candidate of the one or more sidelink relay candidates to a base station;
apply an offset to the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on the signal being in a different frequency band than the sidelink signal;
select a sidelink relay candidate from among the one or more sidelink relay candidates based at least in part on a combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for each sidelink relay candidate of the one or more sidelink relay candidates; and
transmit, to the selected sidelink relay candidate, a message that is to be relayed to the base station.
16 . The UE of claim 15 , wherein the one or more processors, when obtaining the measurement of the sidelink signal for each sidelink relay candidate, are configured to measure the sidelink signal within a sidelink measurement gap.
17 . The UE of claim 15 , wherein the one or more processors, when obtaining the measurement of the signal that is from the respective sidelink relay candidate to the base station, are configured to measure the signal that is from the respective sidelink relay candidate to the base station outside of a sidelink measurement gap.
18 . The UE of claim 15 , wherein the one or more processors, when obtaining the measurement of the signal that is from the respective sidelink relay candidate to the base station, are configured to measure cross-link interference (CLI) based at least in part on a CLI configuration received from another UE via a sidelink.
19 . The UE of claim 15 , wherein the one or more processors are further configured to cause the UE to:
receive an identity of each respective sidelink relay candidate in an inter-UE measurement resource configuration for measuring the signal that is from the respective sidelink relay candidate to the base station; and
associate an inter-UE measurement resource with the respective sidelink relay candidate based at least in part on the identity, wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station includes a measurement of the inter-UE resource.
20 . The UE of claim 15 , wherein the one or more processors are further configured to:
determine the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on jointly processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station in a same filter.
21 . The UE of claim 15 , wherein the one or more processors are further configured to:
determine the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and using a maximum of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for sidelink relay candidate selection.
22 . The UE of claim 15 , wherein the one or more processors are further configured to:
determine the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and using a minimum of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for sidelink relay candidate selection.
23 . The UE of claim 15 , wherein the one or more processors are further configured to:
determine the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on separately processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and selecting the sidelink relay candidate based at least in part on a weighted average of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station.
24 . The UE of claim 15 , wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station is in a different frequency band than the measurement of the sidelink signal, and wherein the combination includes a smaller filtering coefficient or weighting factor for the measurement of the signal that is from the respective sidelink relay candidate to the base station than for the measurement of the sidelink signal.
25 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
obtain, for each of one or more sidelink relay candidates, a measurement of a sidelink signal and a measurement of a signal from a respective sidelink relay candidate of the one or more sidelink relay candidates to a base station;
apply an offset to the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on the signal being in a different frequency band than the sidelink signal;
select a sidelink relay candidate from among the one or more sidelink relay candidates based at least in part on a combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for each sidelink relay candidate of the one or more sidelink relay candidates; and
transmit, to the selected sidelink relay candidate, a message that is to be relayed to the base station.
26 . The non-transitory computer-readable medium of claim 25 , wherein the one or more instructions, when executed by the one or more processors of the UE to obtain the measurement of the signal from the respective sidelink relay candidate to the base station, cause the UE to:
measure cross-link interference (CLI) based at least in part on a CLI configuration received from another UE via a sidelink.
27 . The non-transitory computer-readable medium of claim 25 , wherein the one or more instructions, when executed by the one or more processors of the UE, cause the UE to:
determine the combination of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station based at least in part on processing the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station with separate filters and using a minimum of the measurement of the sidelink signal and the measurement of the signal that is from the respective sidelink relay candidate to the base station for sidelink relay candidate selection.
28 . The non-transitory computer-readable medium of claim 25 , wherein the one or more instructions, when executed by the one or more processors of the UE, cause the UE to:
receive an identity of each respective sidelink relay candidate in an inter-UE measurement resource configuration for measuring the signal that is from the respective sidelink relay candidate to the base station; and
associate an inter-UE measurement resource with the respective sidelink relay candidate based at least in part on the identity, wherein the measurement of the signal that is from the respective sidelink relay candidate to the base station includes a measurement of the inter-UE resource.
29 . The non-transitory computer-readable medium of claim 25 , wherein the obtain the measurement of the sidelink signal for each sidelink relay candidate of the one or more sidelink relay candidates includes measuring the sidelink signal within a sidelink measurement gap.
30 . The non-transitory computer-readable medium of claim 25 , wherein the obtain the measurement of the sidelink signal for the respective sidelink relay candidate includes using a filter to determine a time domain average of the sidelink signals from the one or more sidelink relay candidates.