UE Mobility-Based Cross-Link Interference Mitigation in TDD Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dynamically modifying air interface resource allocations in wireless networks can result in cross-link interference (CLI), leading to degraded signal quality, increased recovery bit errors, and decreased data throughput.
Innovation Solution
Implementing CLI measurement configurations and reports to guide mobility procedures, such as handovers, based on air interface resource configurations, to mitigate CLI by adjusting resource usage and network node connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If air interface resource allocations are dynamically modified to improve network flexibility and adaptability, then network adaptability is improved, but cross-link interference increases leading to degraded signal quality
Solution Approach 1:
The patent applies preliminary action by configuring CLI measurement procedures in advance before interference occurs. The network node pre-configures the UE with measurement parameters, resource indications, and reporting criteria so that when resource allocations are dynamically modified, the UE is already prepared to measure and report CLI conditions, enabling proactive interference mitigation rather than reactive correction
Solution Approach 2:
The patent implements feedback by establishing a closed-loop measurement and reporting mechanism. The UE continuously measures CLI on configured resources and provides feedback reports to the network node. Based on this feedback, the network node can adjust resource allocations, modify TDD configurations, or trigger handovers to mitigate identified interference, creating a dynamic adaptation cycle that resolves the contradiction between flexibility and interference
2Object-affected harmful factors
If CLI measurement configurations are implemented to reduce interference, then signal quality is improved, but device complexity increases due to additional measurement and reporting procedures
Solution Approach 1:
The patent applies local quality by configuring CLI measurements selectively rather than universally. The network node identifies specific UE pairs or cell boundaries where CLI is likely to occur based on TDD configurations and geographic proximity, then configures measurement resources only for those specific cases. This targeted approach improves signal quality where needed while minimizing the complexity burden on all UEs in the network
Solution Approach 2:
The patent uses parameter changes by allowing flexible configuration of measurement parameters such as measurement periodicity, resource allocation patterns, and reporting thresholds. The network can adjust these parameters based on traffic conditions, interference severity, and UE capabilities, optimizing the balance between measurement accuracy and device complexity dynamically rather than using fixed complex procedures for all scenarios
3Productivity
If handover procedures are triggered based on CLI measurement reports to mitigate interference, then data throughput is improved, but loss of time occurs during the handover transition process
Solution Approach 1:
The patent applies preliminary anti-action by preparing alternative target cells or resource configurations in advance based on predicted interference patterns. The network node pre-identifies suitable target cells for potential handovers and pre-configures their resource allocations to avoid expected CLI conditions. When interference is detected, the handover can be executed rapidly to the pre-prepared target, counteracting the throughput loss that would otherwise occur during extended handover transitions
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, a first indication of an air interface resource configuration that is associated with the second network node. The first network node may transmit a cross link interference (CLI) measurement configuration that is addressed to a user equipment (UE) associated with the first network node, the CLI measurement configuration being associated with a CLI measurement procedure at the UE and being based at least in part on the air interface resource configuration. The first network node may receive a second indication of a CLI measurement report that is associated with the UE, the CLI measurement report including a CLI metric that is based at least in part on the CLI measurement configuration. Numerous other aspects are described.