Backhaul signaling for cross-link interference mitigation

Patent metadata

Field	Value
Publication number	US-2025261224-A1
Application number	US-202418441438-A
Country	US
Kind code	A1
Filing date	Feb 14, 2024
Priority date	Feb 14, 2024
Publication date	Aug 14, 2025
Grant date	—

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a first network node, an inter-UE cross-link interference (CLI) configuration. The UE may transmit an inter-UE CLI report to the first network node or to a second network node. The CLI configuration may be associated with CLI between UEs (inter-UE CLI), network nodes (inter-gNodeB CLI), or both. Numerous other aspects are described.

First claim

What is claimed is:

1 . A first network node for wireless communication, comprising:
one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the first network node to:
transmit, to a first user equipment (UE), an inter-UE cross-link interference (CLI) configuration;
transmit the inter-UE CLI configuration to a second network node serving a second UE;
receive an inter-UE CLI report from the first UE; and
transmit the inter-UE CLI report to the second network node.

2 . The first network node of claim 1 , wherein the one or more processors are further configured to cause the first network node to grant, to the first UE, resources associated with low inter-UE CLI.

3 . The first network node of claim 1 , wherein the one or more processors are further configured to cause the first network node to receive, from the second network node, a sounding reference signal (SRS) configuration or uplink reference signal configuration for the second UE.

4 . The first network node of claim 3 , wherein the one or more processors are further configured to cause the first network node to determine the inter-UE CLI configuration in accordance with the SRS or uplink reference signal configuration for the second UE.

5 . The first network node of claim 1 , wherein the one or more processors are further configured to cause the first network node to transmit, to the second network node, the inter-UE CLI report.

6 . The first network node of claim 1 , wherein the one or more processors are further configured to cause the first network node to transmit, to the second network node, the inter-UE CLI configuration.

7 . The first network node of claim 1 , wherein the one or more processors are further configured to cause the first network node to transmit, to the second network node, a mitigation policy.

8 . The first network node of claim 7 , wherein the mitigation policy identifies one or more of a power backoff, one or more transmit beams, one or more receive beams, a guard band, a timing adjustment, one or more aggressor UEs, a most interfering beam, or a least interfering beam.

9 . The first network node of claim 7 , wherein the one or more processors are further configured to cause the first network node to transmit, to a central unit (CU), an indication that the first UE has been configured with the inter-UE CLI configuration.

10 . The first network node of claim 1 , wherein the inter-UE CLI configuration is transmitted via one or more of Layer 1/Layer 2 (L1/L2) signaling or Layer 3 (L3) signaling.

11 . A first network node for wireless communication, comprising:
one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the first network node to:
transmit, to a first user equipment (UE), an uplink reference signal configuration;
transmit, to a second network node, the uplink reference signal configuration;
receive an uplink reference signal measurement report from the first UE; and
transmit the uplink reference signal measurement report to the first network node.

12 . The first network node of claim 11 , wherein the one or more processors are further configured to cause the first network node to receive, from the second network node, an inter-UE cross-link interference (CLI) configuration for a second UE.

13 . The first network node of claim 11 , wherein the one or more processors are further configured to cause the first network node to receive an inter-UE cross-link interference (CLI) report from the second network node, the inter-UE CLI report being associated with a second UE.

14 . The first network node of claim 11 , wherein the one or more processors are further configured to cause the first network node to configure the first UE to reduce a transmit power.

15 . The first network node of claim 11 , wherein the one or more processors are further configured to cause the first network node to transmit, to the second network node, a mitigation policy, wherein the mitigation policy identifies one or more of a power backoff, one or more transmit beams, one or more receive beams, a guard band, a timing adjustment, one or more aggressor UEs, a most interfering beam, or a least interfering beam.

16 . The first network node of claim 11 , wherein the one or more processors are further configured to cause the first network node to receive, from a distributed unit (DU), an indication that the first UE has been configured with an inter-UE cross-link interference (CLI) configuration.

17 . A first network node for wireless communication, comprising:
one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the first network node to:
transmit an inter-gNB cross-link interference (CLI) measurement configuration to a second network node;
receive an inter-gNB CLI report from the second network node; and
mitigate inter-gNB CLI between the first network node and the second network node.

18 . The first network node of claim 17 , wherein the one or more processors, to cause the first network node to mitigate the inter-gNB CLI, are configured to cause the first network node to reduce a transmission power.

19 . The first network node of claim 17 , wherein the one or more processors are further configured to cause the first network node to transmit the inter-gNB CLI report to a third network node.

20 . The first network node of claim 17 , wherein the inter-gNB CLI configuration includes one or more of a measurement configuration identifier, one or more CLI measurement resources, a CLI measurement trigger, a CLI measurement periodicity, a CLI measurement window, a CLI measurement type, a CLI reporting trigger, an indication for measuring one or more of leakage or direct interference, an indication for filtering the CLI measurement, or an indication for instantaneous CLI measurement.

21 . The first network node of claim 17 , wherein the one or more processors are further configured to cause the first network node to measure a CLI periodically or upon a triggering event.

22 . The first network node of claim 17 , wherein the inter-gNB CLI report includes one or more inter-gNB CLI measurements.

23 . The first network node of claim 17 , wherein the inter-gNB CLI report includes one or more of a measurement configuration identifier, one or more network node identifiers, one or more beam identifiers, one or more sub-band identifiers, an indication of a most aggressor sub-band, an indication of a least aggressor sub-band, an indication of a most aggressor network node, an indication of a least aggressor network node, an indication of a most interfering beam, an indication of a least interfering beam, an indication that a CLI measured is caused by leakage, an indication that the CLI measured is caused by direct interference, or an indication of a CLI report type.

24 . The first network node of claim 17 , wherein the one or more processors are further configured to cause the first network node to transmit the inter-gNB CLI report periodically or upon a triggering event.

25 . The first network node of claim 17 , wherein the first network node is one of a central unit (CU) or a distributed unit (DU).

26 . The first network node of claim 17 , wherein the second network node is one of a central unit (CU) or a distributed unit (DU).

Assignees

• Qualcomm Inc

Inventors

• Krishnan Shankar
• Abdelghaffar Muhammad Sayed Khairy
• Kadiri Prasad Reddy
• Saha Chiranjib

Classifications

• H04W92/20

  between access points · CPC title

• H04W92/18

  between terminal devices · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04W72/40

  Resource management for direct mode communication, e.g. D2D or sidelink · CPC title

• H04W72/541 Primary

  using the level of interference · CPC title