Cell-Aware Cross-Link Interference Measurement for Lower UE Power Use

Solution Overview

Problem

In wireless communications systems, cross-link interference (CLI) occurs when neighboring UEs with misaligned timing configurations cause interference, leading to inefficient use of measurement resources, unnecessary power expenditure, and poor CLI measurements due to the victim UE's unawareness of its relationship to aggressor UEs.

Innovation Solution

A base station configures CLI measurement resources and provides cell parameters to the victim UE, indicating the relationship between serving cells, allowing the UE to adjust measurement windows and prioritize aggressor UEs based on this information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the victim UE performs CLI measurements on all configured resources without knowing the relationship to aggressor UEs, then the measurement coverage is complete, but the power consumption increases and measurement efficiency decreases

Engineering Contradiction:

ImproveCLI measurement coverageVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The base station provides cell parameter information to the victim UE in advance before CLI measurements are performed. This preliminary information allows the UE to identify and prioritize aggressor UEs, performing measurements only on relevant resources rather than all configured resources, thereby reducing power consumption while maintaining measurement coverage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The victim UE applies different measurement strategies to different aggressor UEs based on their relationship to the serving cell. For intra-cell aggressors, the UE performs measurements with higher priority and uses specific timing relationships, while for inter-cell aggressors, the UE may reduce measurement frequency or skip measurements entirely, optimizing power usage locally for each aggressor type.

Inventive Principle:

Principle #3Local quality

2Reliability

If the victim UE performs CLI measurements on all configured resources, then the measurement completeness is ensured, but the system efficiency decreases due to misaligned timing

Engineering Contradiction:

ImproveCLI measurement completenessVSAvoidsystem efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The base station provides cell parameter information to the victim UE in advance before CLI measurements are performed. This preliminary information allows the UE to identify and prioritize aggressor UEs, performing measurements only on relevant resources rather than all configured resources, thereby reducing power consumption while maintaining measurement coverage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The victim UE applies different measurement strategies to different aggressor UEs based on their relationship to the serving cell. For intra-cell aggressors, the UE performs measurements with higher priority and uses specific timing relationships, while for inter-cell aggressors, the UE may reduce measurement frequency or skip measurements entirely, optimizing power usage locally for each aggressor type.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If the base station provides detailed cell parameters to all UEs, then the measurement accuracy improves, but the communication overhead increases

Engineering Contradiction:

ImproveCLI measurement accuracyVSAvoidcommunication overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The base station provides cell parameter information selectively based on the UE's needs and its relationship to aggressor cells. Not all UEs receive the same level of detail - only UEs that are likely to be victims of CLI from specific aggressors receive relevant cell parameters, reducing overall communication overhead while maintaining measurement accuracy for those who need it.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The base station provides cell parameter information to the victim UE in advance before CLI measurements are performed. This preliminary information allows the UE to identify and prioritize aggressor UEs, performing measurements only on relevant resources rather than all configured resources, thereby reducing power consumption while maintaining measurement coverage.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12389257B2Cross-link interference measurement configuration

Publication Date: 2025.08.12 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. Generally, a base station may transmit, to a victim user equipment (UE) a configuration message indication one or more resource for measuring cross-link interference (CLI) from an aggressor UE. The configuration message may include one or more cell parameters, which may include an indication of a relationship between the serving cell of the victim UE and the serving cell of the aggressor UE. The victim UE may determine the relationship between the serving cells based on the received cell parameters, and may perform CLI measurements based thereon. In some cases, the UE may adjust a CLI measurement window, or may prioritize some aggressor UEs, based on the determined relationship. The UE may also transmit a CLI measurement report to the base station.