SINR-Based CLI Reporting for Interference-Aware Wireless Scheduling

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Solution Overview

Problem

Wireless communications systems face challenges in minimizing cross-link interference (CLI) as the number of user equipments (UEs) increases, leading to frequent failed transmissions and excessive retransmissions, which reduce throughput and increase overhead.

Innovation Solution

UEs report channel state feedback (CSF) and cross-link interference (CLI) measurements to network entities, including indicators and values, and signal-to-interference-plus-noise ratio (SINR), to facilitate network scheduling and minimize CLI.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the number of UEs in a wireless communications system increases, then system capacity and coverage are improved, but interference between UEs increases leading to failed transmissions and excessive retransmissions

Engineering Contradiction:

Improvenumber of UEsVSAvoidtransmission success rate

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where UEs report CLI measurements to the network entity. The network entity receives these reports and uses the information to adjust scheduling decisions, thereby reducing interference and improving transmission reliability as system capacity scales.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network entity acts as an intermediary that collects CLI measurement reports from UEs and uses this information to make informed scheduling decisions. This intermediary role enables the system to coordinate transmissions and reduce interference without requiring direct UE-to-UE coordination.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If CLI measurements and reporting are implemented, then interference management is improved, but signaling overhead and processing complexity increase

Engineering Contradiction:

Improveinterference management effectivenessVSAvoidsignaling and processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements partial action by having UEs report CLI measurements selectively rather than continuously. The network entity can configure reporting based on specific conditions or triggers, reducing the overall signaling overhead while still maintaining effective interference management where needed.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12425900B2Cross-link interference reporting configuration and payload design

Publication Date: 2025.09.23 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. In one aspect, a UE may report channel state feedback (CSF) to a network entity based on channel state information (CSI) measurements and CLI measurements. In another aspect, a UE may explicitly report CLI measurements to a network entity. In yet another aspect, a UE may report a signal-to-interference-plus-noise ratio (SINR) to a network entity based on CLI measurements, and the network entity may trigger the UE to perform further CLI measurements on signals received from other UEs based on the SINR. In yet another aspect, a UE may generate a report using CLI measurements based on whether the UE is allocated enough time to generate and transmit the report. In yet another aspect, a UE may identify a suitable priority for reporting CLI to a network entity.