Over-the-air signaling for inter-base station cross link interference measurements
Methods, systems, and devices for wireless communications are described. A network entity, such as a base station, may receive, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity. The network entity may monitor a plurality of receive beams for a plurality of downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern and may select a communication beam according to one or more cross-link interference (CLI) measurements associated with one or more of the plurality of receive beams in accordance with the monitoring. The network entity may communicate with a user equipment using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity. The network entity may experience or may cause the measured CLI.
1. An apparatus for wireless communication, comprising:
at least one processor; and
memory coupled with the at least one processor, the memory storing instructions executable by the at least one processor to cause the apparatus to:
receive, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity;
monitor a plurality of receive beams at a second network entity for a plurality of downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern;
select a communication beam according to one or more cross-link interference measurements associated with one or more of the plurality of receive beams in accordance with the monitoring; and
communicate with a user equipment (UE) using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.
2. The apparatus of claim 1 , wherein the communication beam comprises a transmit beam and the instructions executable by the at least one processor to cause the apparatus to communicate with the UE are executable by the at least one processor to cause the apparatus to:
perform a downlink transmission from the second network entity to the UE using the selected transmit beam, wherein the scheduled communication at the first network entity comprises an uplink transmission to the first network entity scheduled by the plurality of downlink control channel transmissions.
3. The apparatus of claim 1 , wherein the communication beam comprises a receive beam and the instructions executable by the at least one processor to cause the apparatus to communicate with the UE are executable by the at least one processor to cause the apparatus to:
receive an uplink communication from the UE using the selected receive beam, wherein the scheduled communication at the first network entity comprises a downlink transmission from the first network entity scheduled by the plurality of downlink control channel transmissions.
4. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive, using a first receive beam of the plurality of receive beams, at least one downlink control channel transmission of the plurality of downlink control channel transmissions associated with a transmit beam of the first network entity based at least in part on the monitoring; and
measure a cross-link interference level associated with the at least one downlink control channel transmission as one of the one or more cross-link interference measurements, wherein selecting the transmit beam is based at least in part on the measuring.
5. The apparatus of claim 1 , wherein the instructions to select the communication beam are executable by the processor to cause the apparatus to:
select a transmit beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or
select a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.
6. The apparatus of claim 1 , wherein the instructions to select the communication beam are executable by the processor to cause the apparatus to:
select a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a first threshold, wherein the communicating with the UE comprises:
transmit, using the selected transmit beam, a downlink transmission using a reduced transmission power based at least in part on the cross-link interference level associated with the selected transmit beam being higher than the first threshold.
7. The apparatus of claim 1 , wherein the instructions to select the communication beam are executable by the processor to cause the apparatus to:
select a receive beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or
select a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.
8. The apparatus of claim 1 , wherein the instructions to select the communication beam are executable by the processor to cause the apparatus to:
select a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a threshold;
and transmit signaling indicating a power increase to the UE, wherein the communicating with the UE comprises:
receive, using the selected receive beam from the UE, an uplink transmission based at least in part on the power increase.
9. The apparatus of claim 1 , wherein the downlink control channel transmission pattern comprises a set of time and frequency resources for a plurality of downlink control channel transmission repetitions.
10. The apparatus of claim 1 , wherein the one or more cross-link interference measurements comprise one or more reference signal receive power measurements for each receive beam of the plurality of receive beams.
11. The apparatus of claim 1 , wherein:
the plurality of receive beams are downlink beams.
12. The apparatus of claim 1 , wherein:
the plurality of receive beams are uplink beams.
13. A method for wireless communication, comprising:
receiving, from a first network entity, a broadcast indicating a downlink control channel transmission pattern associated with the first network entity;
monitoring a plurality of receive beams at a second network entity for a plurality of downlink control channel transmissions from the first network entity according to the downlink control channel transmission pattern;
selecting a communication beam according to one or more cross-link interference measurements associated with one or more of the plurality of receive beams in accordance with the monitoring; and
communicating with a user equipment (UE) using the selected communication beam and a first set of resources that at least partially overlap in time and frequency with a scheduled communication at the first network entity.
14. The method of claim 13 , wherein the communication beam comprises a transmit beam and communicating with the UE comprises:
performing a downlink transmission from the second network entity to the UE using the selected transmit beam, wherein the scheduled communication at the first network entity comprises an uplink transmission to the first network entity scheduled by the plurality of downlink control channel transmissions.
15. The method of claim 13 , wherein the communication beam comprises a receive beam and communicating with the UE comprises:
receiving an uplink communication from the UE using the selected receive beam, wherein the scheduled communication at the first network entity comprises a downlink transmission from the first network entity scheduled by the plurality of downlink control channel transmissions.
16. The method of claim 13 , further comprising:
receiving, using a first receive beam of the plurality of receive beams, at least one downlink control channel transmission of the plurality of downlink control channel transmissions associated with a transmit beam of the first network entity based at least in part on the monitoring; and
measuring a cross-link interference level associated with the at least one downlink control channel transmission as one of the one or more cross-link interference measurements, wherein selecting the transmit beam is based at least in part on the measuring.
17. The method of claim 13 , wherein selecting the communication beam comprises:
selecting a transmit beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or
selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.
18. The method of claim 13 , wherein selecting the communication beam comprises:
selecting a transmit beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a first threshold, wherein the communicating with the UE comprises:
transmitting, using the selected transmit beam, a downlink transmission using a reduced transmission power based at least in part on the cross-link interference level associated with the selected transmit beam being higher than the first threshold.
19. The method of claim 13 , wherein selecting the communication beam comprises:
selecting a receive beam associated with a lowest cross-link interference level of the one or more cross-link interference measurements; or
selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is smaller than a threshold cross-link interference level.
20. The method of claim 13 , wherein selecting the communication beam comprises:
selecting a receive beam associated with a cross-link interference level of the one or more cross-link interference measurements that is higher than a threshold;
and transmitting signaling indicating a power increase to the UE, wherein the communicating with the UE comprises:
receiving, using the selected receive beam from the UE, an uplink transmission based at least in part on the power increase.
21. The method of claim 13 , wherein the downlink control channel transmission pattern comprises a set of time and frequency resources for a plurality of downlink control channel transmission repetitions.
22. The method of claim 13 , wherein the one or more cross-link interference measurements comprise one or more reference signal receive power measurements for each receive beam of the plurality of receive beams.
23. The method of claim 13 , wherein:
the plurality of receive beams are downlink beams.
24. The method of claim 13 , wherein:
the plurality of receive beams are uplink beams.