UE Cross-Link Interference Measurement and Reporting Method

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Solution Overview

Problem

Full duplex wireless communication systems face significant interference challenges due to self-interference, UE-to-UE inter-link interference, and BS-to-BS inter-link interference, which hinder the effective use of shared frequency resources and reduce communication performance.

Innovation Solution

A method for a user equipment (UE) to report measurement information on UE-to-UE cross-link interference by receiving interference measurement resource configuration information or sounding reference signal configuration from a base station, measuring the interference, and transmitting the measured values back to the base station, allowing for periodic or aperiodic reporting based on threshold conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If full duplex communication is implemented to double system capacity, then transmission and reception can occur simultaneously, but self-interference and cross-link interference significantly degrade communication performance

Engineering Contradiction:

Improvesystem capacityVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary interference measurement and reporting before full duplex communication begins. The base station configures interference measurement resources (IMR) and sounding reference signals (SRS) in advance, allowing UEs to measure and report cross-link interference levels proactively, enabling the network to adjust resource allocation and power control parameters before interference degrades communication performance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A feedback mechanism is established where UEs continuously measure cross-link interference on configured IMR resources and report measured values to the base station. The base station uses this feedback to dynamically adjust uplink power control parameters, resource allocation, and duplex mode decisions, creating a closed-loop system that adapts to changing interference conditions in real-time

Inventive Principle:

Principle #23Feedback

2Measurement precision

If interference measurement resources are allocated for cross-link interference measurement, then interference can be detected and managed, but system resources are consumed

Engineering Contradiction:

Improveinterference measurement accuracyVSAvoidsystem resources

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system designs interference measurement resources (IMR) and sounding reference signals (SRS) to serve multiple purposes simultaneously. These resources are used for both channel estimation and cross-link interference measurement, eliminating the need for separate dedicated interference measurement resources and improving resource utilization efficiency

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The base station configures interference measurement to be performed only when necessary based on traffic conditions and interference levels. Reporting can be triggered periodically or aperiodically based on threshold conditions, allowing the system to perform measurements at sufficient frequency without continuously consuming measurement resources

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If periodic interference reporting is implemented, then interference management is improved, but uplink signaling overhead increases

Engineering Contradiction:

Improveinterference managementVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The system implements periodic interference reporting where UEs measure and report cross-link interference at configured intervals. The reporting period can be adjusted dynamically based on traffic conditions, allowing the system to maintain reliable interference management while optimizing signaling overhead by reducing reporting frequency when interference conditions are stable

Inventive Principle:

Principle #19Periodic action

4Loss of information

If aperiodic interference reporting based on thresholds is used, then signaling overhead is reduced, but interference management responsiveness decreases

Engineering Contradiction:

Improvesignaling overheadVSAvoidinterference management responsiveness

Core Design Contradiction:

Loss of informationVSSpeed

Solution Approach 1:

The system dynamically adjusts the interference reporting mechanism based on current conditions. When interference levels approach critical thresholds or change rapidly, the system triggers aperiodic reporting to increase responsiveness. When conditions are stable, reporting frequency is reduced to minimize overhead, creating a dynamic balance between responsiveness and signaling efficiency

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12127029B2Method for reporting measurement data, and terminal therefor

Publication Date: 2024.10.22 LG ELECTRONICS INC

AI summary

A method for a terminal for reporting measurement data may comprise the steps of: receiving, from a base station, interference measurement resource (IMR) configuration data or sounding reference symbol (SRS) configuration data for measuring terminal-to-terminal (UE-to-UE) cross-link interference; measuring UE-to-UE cross-link interference on the basis of IMR or SRS configuration data; and transmitting a report containing the measured UE-to-UE cross-link interference measurement value to the base station.