Interference mitigation for a user equipment
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive an indication of one or more of: an identifier of a neighbor user equipment (UE) associated with a neighbor network node, a location and mobility status of a UE served by the network node, or beam adaptation information of the UE served by the network node. The network node may perform an interference mitigation for the UE served by the network node based at least in part on the indication of one or more of: the identifier of the neighbor UE, the location and mobility status of the UE, or the beam adaptation information of the UE. Numerous other aspects are described.
1. An apparatus for wireless communication at a network node, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive an indication of one or more of: an identifier of a neighbor user equipment (UE) associated with a neighbor network node, a location and mobility status of a UE served by the network node, or beam adaptation information of the UE served by the network node; and
perform an interference mitigation for the UE served by the network node based at least in part on the indication of one or more of: the identifier of the neighbor UE, the location and mobility status of the UE, or the beam adaptation information of the UE.
2. The apparatus of claim 1 , wherein the UE is a customer premise equipment (CPE) or a wireless access backhaul (WAB), and the UE operates with a larger antenna array as compared to an enhanced mobile broadband (eMBB) UE.
3. The apparatus of claim 1 , wherein the neighbor UE is a customer premise equipment (CPE) or a wireless access backhaul (WAB), and the identifier of the neighbor UE is a CPE identifier or a WAB identifier.
4. The apparatus of claim 1 , wherein the one or more processors, to perform the interference mitigation, are configured to coordinate or adjust a scheduled beam or time-frequency resource to avoid using an interference beam at a same time or at a same time-frequency resource as the neighbor UE.
5. The apparatus of claim 1 , wherein the indication of the location and mobility status of the UE is a flag with one or more bits, the one or more bits indicating whether the UE is fixed, mobile, semi-static fixed, frequently moving, or rotation only.
6. The apparatus of claim 1 , wherein the location and mobility status of the UE indicates one or more of: movement statistics or additional assistance information, the movement statistics including one or more of a location changing rate, a coherence time, or a best cell or beam changing rate, and the additional assistance information including an antenna array size.
7. The apparatus of claim 1 , wherein the beam adaptation information of the UE indicates whether one or more of beams, antenna arrays, or corresponding time-frequency resource patterns of the UE are adaptable.
8. The apparatus of claim 1 , wherein the one or more processors are further configured to:
transmit one or more of: the location and mobility status or the beam adaptation information, of the UE, to the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling for interference mitigation.
9. The apparatus of claim 1 , wherein the one or more processors are further configured to:
measure a UE-to-network-node interference from the UE interfering the neighbor network node; or
measure a network-node-to-UE interference from the UE interfering the neighbor network node depending on a channel reciprocity,
wherein measurements of the UE-to-network-node interference or the network-node-to-UE-interference are based at least in part on one or more of: a periodic uplink transmission, a semi-persistent uplink transmission, or an uplink reference signal between the network node and the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling, and the uplink reference signal including a sounding reference signal (SRS).
10. The apparatus of claim 1 , wherein the one or more processors are further configured to:
receive measurement results associated with the UE; and
transmit the measurement results to the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling for the interference mitigation.
11. The apparatus of claim 10 , wherein the measurement results indicate a measured interference based at least in part on ongoing downlink traffic transmitted on an active uplink transmit beam, the ongoing downlink traffic being received and measured using the active uplink transmit beam.
12. The apparatus of claim 10 , wherein the measurement results indicate a measured interference based at least in part on ongoing downlink traffic transmitted on an active downlink receive beam, the ongoing downlink traffic being received and measured using the active downlink receive beam.
13. The apparatus of claim 10 , wherein the measurement results are based at least in part on downlink transmissions between the network node and the neighbor network node.
14. The apparatus of claim 10 , wherein the measurement results are based at least in part on a reference signal, the reference signal including a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB).
15. The apparatus of claim 1 , wherein the interference mitigation is performed by the network node based at least in part on a predefined rule, the predefined rule being based at least in part on a traffic priority, a location and mobility status indicated by the UE, or beam adaptation information indicated by the UE.
16. The apparatus of claim 1 , wherein the interference mitigation includes a UE-to-UE cross link interference (CLI) mitigation, a network-node-to-network-node CLI mitigation, a UE-to-network-node interference mitigation, or a network node-to-UE interference mitigation.
17. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit an indication of one or more of: a location and mobility status of the UE, or beam adaptation information of the UE, the UE being served by a network node; and
receive an indication of a scheduling, the scheduling being associated with an interference mitigation based at least in part on the indication of one or more of: the location and mobility status of the UE, or the beam adaptation information of the UE.
18. The apparatus of claim 17 , wherein:
the indication of the location and mobility status of the UE is a flag with one or more bits, the one or more bits indicating whether the UE is fixed, mobile, semi-static fixed, frequently moving, or rotation only; or
the location and mobility status of the UE indicates one or more of: movement statistics or additional assistance information, the movement statistics including one or more of a location changing rate, a coherence time, or a best cell or beam changing rate, and the additional assistance information including an antenna array size.
19. The apparatus of claim 17 , wherein the beam adaptation information of the UE indicates whether one or more of beams, antenna arrays, or corresponding time-frequency resource patterns of the UE are adaptable.
20. The apparatus of claim 17 , wherein the one or more processors are further configured to:
transmit measurement results associated with the UE.
21. The apparatus of claim 20 , wherein:
the measurement results indicate a measured interference based at least in part on ongoing downlink traffic transmitted on an active uplink transmit beam, the ongoing downlink traffic being received and measured using the active uplink transmit beam; or
the measurement results indicate a measured interference based at least in part on ongoing downlink traffic transmitted on an active downlink receive beam, the ongoing downlink traffic being received and measured using the active downlink receive beam.
22. The apparatus of claim 20 , wherein:
the measurement results are based at least in part on downlink transmissions between the network node and a neighbor network node; or
the measurement results are based at least in part on a reference signal, the reference signal including a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB).
23. The apparatus of claim 17 , wherein the interference mitigation is performed by the UE based at least in part on a predefined rule, the predefined rule being based at least in part on a traffic priority, a location and mobility status indicated by the UE, or beam adaptation information indicated by the UE.
24. The apparatus of claim 17 , wherein the interference mitigation includes a UE-to-UE cross link interference (CLI) mitigation, a network-node-to-network-node CLI mitigation, a UE-to-network-node interference mitigation, or a network node-to-UE interference mitigation.
25. A method of wireless communication performed by a network node, comprising:
receiving an indication of one or more of: an identifier of a neighbor user equipment (UE) associated with a neighbor network node, a location and mobility status of a UE served by the network node, or beam adaptation information of the UE served by the network node; and
performing an interference mitigation for the UE served by the network node based at least in part on the indication of one or more of: the identifier of the neighbor UE, the location and mobility status of the UE, or the beam adaptation information of the UE.
26. The method of claim 25 , wherein performing the interference mitigation comprises coordinating or adjusting a scheduled beam or time-frequency resource to avoid using an interference beam at a same time or at a same time-frequency resource as a neighbor UE.
27. The method of claim 25 , further comprising:
transmitting one or more of: the location and mobility status or the beam adaptation information, of the UE, to the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling for interference mitigation.
28. The method of claim 25 , further comprising:
measuring a UE-to-network-node interference from the UE interfering the neighbor network node; or
measuring a network-node-to-UE interference from the UE interfering the neighbor network node depending on a channel reciprocity,
wherein measurements of the UE-to-network-node interference or the network-node-to-UE-interference are based at least in part on one or more of: a periodic uplink transmission, a semi-persistent uplink transmission, or an uplink reference signal between the network node and the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling, and the uplink reference signal including a sounding reference signal (SRS).
29. The method of claim 25 , further comprising:
receiving measurement results associated with the UE; and
transmitting the measurement results to the neighbor network node via a backhaul signaling or an over-the-air (OTA) signaling for the interference mitigation.
30. A method of wireless communication performed by a user equipment (UE), comprising:
transmitting an indication of one or more of: a location and mobility status of the UE, or beam adaptation information of the UE, the UE being served by a network node; and
receiving an indication of a scheduling, the scheduling being associated with an interference mitigation based at least in part on the indication of one or more of: the location and mobility status of the UE, or the beam adaptation information of the UE.