Cross-Link Interference Reporting for Inter-Operator Base Stations
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Solution Overview
Problem
Existing wireless communication systems face challenges in mitigating inter-operator, inter-base station cross-link interference (CLI) which affects communication efficiency and spectrum utilization, particularly in 5G NR networks.
Innovation Solution
A method and apparatus are provided to identify and report cross-link interference between network nodes of different operators, enabling adjustments to reduce interference by beam-based coordination, allowing for full-duplex communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-operator, inter-base station cross-link interference mitigation mechanisms are implemented, then communication quality between base stations of different operators is improved, but system complexity and coordination overhead increase
Solution Approach 1:
The patent introduces an intermediary signaling mechanism where a first network node reports interference information to a second network node through standardized messages. This mediator approach enables coordinated interference mitigation between operators without requiring direct complex interactions, thus improving communication quality while managing system complexity through structured communication protocols.
Solution Approach 2:
The patent employs parameter changes by adjusting communication parameters such as slot formats, sub-band configurations, and transmission power levels based on reported interference conditions. This allows dynamic adaptation of system parameters to mitigate cross-link interference while maintaining operational flexibility and avoiding permanent system complexity increases.
2Measurement precision
If detailed interference reporting and identification mechanisms are used, then interference mitigation precision is improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent extracts only the essential interference identification information needed for mitigation, such as interference source identification and basic characteristics, while omitting redundant detailed measurements. This selective information extraction maintains sufficient precision for effective interference mitigation while reducing signaling overhead and processing requirements.
Solution Approach 2:
The patent implements partial reporting by providing just enough interference information to enable effective mitigation actions, rather than reporting all possible measurement data. This partial action approach achieves adequate interference identification precision without the excessive signaling overhead that would result from comprehensive reporting.
3Productivity
If dynamic adjustment of communication parameters is implemented, then spectral efficiency is improved, but control complexity and response time requirements increase
Solution Approach 1:
The patent implements dynamic adjustment of communication parameters such as slot formats and transmission power based on real-time interference conditions. This dynamic approach allows the system to adapt to changing interference environments, improving spectral efficiency while the structured control mechanism manages the complexity of dynamic adjustments through standardized procedures.
Data Source
AI summary
A network node identifies cross-link interference to a first channel of a first network node associated with a first operator, the cross-link interference being caused by a second channel from a second network node that is associated with a second operator that is different than the first operator. The network node reports the cross-link interference to the first channel of the first network node with information to identify at least one of the second channel or the second network node.