Cross-link interference (CLI) measurement reporting
Disclosed are apparatuses and methods for measuring and/or reporting UE-to-UE crosslink interference (CLI). Techniques of realizing efficient L3 CLI RSSI and SRS-RSRP reporting and triggering mechanisms are disclosed. The disclosed apparatuses and methods can configure a measurement object to include a cross-link sounding reference signal (SRS) resource or a cross-link received signal strength indicator (RSSI) resource. A level of cross-link interference (CLI) between a first user equipment (UE) and a second UE based is determined, at least in part, on the configured measurement object. Then, in response to occurrence of a predetermined event, a report is generated that includes the level of CLI. The measurement object is configured to include a resource configuration parameters for a cross-link interference received signal strength indicator (CLI-RSSI) measurement and sounding reference signal (SRS) resource configurations for a cross-link SRS reference signal received power (SRS-RSRP) measurement. One of the first or second UEs can transmit the report.
1. A method comprising:
configuring a single measurement object to include a cross-link sounding reference signal (SRS) resource and a cross-link received signal strength indicator (RSSI) resource;
determining a level of cross-link interference (CLI) between a first user equipment (UE) and a second UE based, at least in part, on the single measurement object; and
generating, in response to occurrence of a predetermined event, a report that includes the level of CLI,
wherein the predetermined event comprises an offset from an SRS reference signal received power (SRS-RSRP) to a power of a serving cell being equal to or greater than a threshold.
2. The method of claim 1 , wherein the single measurement object is configured to include resource configuration parameters for a CLI-RSSI measurement and SRS resource configurations for a cross-link SRS-RSRP measurement.
3. The method of claim 2 , wherein one of the first and the second UEs performs the CLI-RSSI measurement and the SRS-RSRP measurement simultaneously.
4. The method of claim 2 , wherein one of the first or second UEs transmits the report.
5. The method of claim 1 , wherein a measurement metric for the level of CLI comprises at least one of a SRS-RSRP and an RSSI.
6. The method of claim 1 , wherein the report is further triggered by measuring:
an RSSI used to indicate the level of CLI being above the threshold; or
a SRS-RSRP used to indicate the level of CLI being above the threshold.
7. The method of claim 1 , wherein the single measurement object is an information element (IE).
8. The method of claim 7 , wherein the IE is a ReferenceSignalConfig IE in a MeasObjectNR IE.
9. The method of claim 8 , wherein the cross-link SRS resource is represented in the ReferenceSignalConfig IE as an srs-ConfigCrosslinkList IE and the cross-link RSSI resource is represented in the ReferenceSignalConfig IE as an rssi-ConfigCrosslinkList IE.
10. The method of claim 9 , wherein the srs-ConfigCrosslinkList IE defines one or more SRSs associated with measuring an SRS-RSRP, wherein the SRS-RSRP indicates the level of CLI.
11. The method of claim 9 , wherein the rssi-ConfigCrosslinkList IE defines one or more time-frequency resources associated with measuring an RSSI, wherein the RSSI indicates the level of CLI.
12. A first user equipment (UE), comprising:
radio front end circuitry; and
processing circuitry, coupled to the radio front end circuitry, wherein the processing circuitry is configured to:
configure a single measurement object to include a cross-link sounding reference signal (SRS) resource and a cross-link received signal strength indicator (RSSI) resource;
determine a level of cross-link interference (CLI) between the first UE and a second UE based, at least in part, on the single measurement object; and
generate, in response to occurrence of a predetermined event, a report that includes the level of CLI,
wherein the predetermined event comprises an offset from an SRS reference signal received power (SRS-RSRP) to a power of a serving cell being equal to or greater than a threshold.
13. The first UE of claim 12 , wherein the single measurement object is an information element (IE).
14. The first UE of claim 13 , wherein the IE is a ReferenceSignalConfig IE in a MeasObjectNR IE.
15. The first UE of claim 14 , wherein the cross-link SRS resource is represented in the ReferenceSignalConfig IE as an srs-ConfigCrosslinkList IE and the cross-link RSSI resource is represented in the ReferenceSignalConfig IE as an rssi-ConfigCrosslinkList IE.
16. The first UE of claim 15 , wherein the srs-ConfigCrosslinkList IE defines one or more SRSs associated with measuring an SRS SRS-RSRP, wherein the measured SRS-RSRP indicates the level of CLI.
17. The first UE of claim 15 , wherein the rssi-ConfigCrosslinkList IE defines one or more time-frequency resources associated with measuring an RSSI, wherein the RSSI indicates the level of CLI.
18. The first UE of claim 12 , wherein the predetermined event comprises a SRS-RSRP exceeding the threshold.
19. The first UE of claim 12 , wherein the predetermined event comprises an RSSI exceeding the threshold.