MAC Control Element Reporting for Cross-Link Interference

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems face challenges in effectively managing and reporting cross-link interference (CLI) and self-interference (SI) in environments with multiple access technologies, which can degrade network performance and user experience.

Innovation Solution

The implementation of a medium access control control element (MAC CE) that includes reports indicating CLI or SI values, allowing for their measurement and reporting, along with configurations for resource management by network entities, to mitigate interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple access technologies are deployed to support multiple users, then system capacity and user coverage are improved, but cross-link interference and self-interference increase

Engineering Contradiction:

Improvesystem capacityVSAvoidcross-link interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism where UEs measure CLI/SI values and report them to the network entity via MAC CE. The network entity receives these reports and uses the information to adjust resource allocation, power control, or scheduling decisions, creating a closed-loop system that actively responds to interference conditions while maintaining high system capacity

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent introduces MAC CE as an intermediary control element that carries interference measurement reports from UEs to the network entity. This intermediary structure enables systematic collection and processing of interference data without disrupting the existing multiple-access communication framework, allowing the network to manage CLI/SI while preserving system capacity

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If resource allocation is increased to support more users, then network coverage is improved, but interference management complexity increases

Engineering Contradiction:

Improvenetwork coverageVSAvoidinterference management complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent enables UEs to autonomously measure CLI/SI values and generate reports without requiring complex network-side interference management infrastructure. Each UE independently assesses its interference environment and communicates findings to the network, distributing the measurement burden across users rather than concentrating complexity in the network entity

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent uses the existing MAC CE structure, originally designed for other control purposes, to carry interference measurement reports. This multi-functional use of established protocol elements extends interference management capability across the network without requiring dedicated new signaling mechanisms, thereby reducing overall system complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260005779A1Medium access control control element for reporting interference

Publication Date: 2026.01.01 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may generate a medium access control control element (MAC CE) that includes one or more reports that each indicate one or more cross-link interference or self-interference values. The UE may transmit the MAC CE. Numerous other aspects are described.