Cross-link Interference Reporting in Full Duplex Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing cross-link interference (CLI) in full duplex communications, which can degrade the quality of wireless communication and lead to loss of information.
Innovation Solution
A network node is configured to receive a group common downlink control information (GC DCI) transmission comprising a cross-link interference (CLI) measurement request indication, and to determine or transmit CLI information based on channel state information (CSI) interference measurements during indicated interference measurement occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex communication is implemented to improve spectral efficiency, then communication capacity increases, but cross-link interference degrades signal quality
Solution Approach 1:
The system performs preliminary CLI measurements and reports interference conditions before full duplex transmission begins. The network node receives CLI measurement requests and conducts interference assessments in advance, allowing the system to identify potential interference issues and adjust resource allocation or transmission parameters proactively, rather than reacting after interference has degraded communication quality
Solution Approach 2:
The patent implements a feedback mechanism where user equipment measures cross-link interference and reports results to the network node. This continuous feedback loop enables the system to monitor interference levels during full duplex operation and dynamically adjust resource allocation, power control, or scheduling decisions to maintain communication quality while preserving the capacity benefits of full duplex mode
2Measurement precision
If CLI measurement resources are increased to improve measurement accuracy, then interference detection precision improves, but system overhead increases
Solution Approach 1:
The system implements partial measurement by configuring CLI measurement resources selectively for specific user equipment experiencing interference, rather than universally for all users. The network node can activate measurement resources on-demand based on traffic patterns and interference conditions, performing measurements only when and where needed, thus achieving sufficient measurement accuracy without the overhead of continuous comprehensive monitoring
Solution Approach 2:
The patent segments the CLI measurement process into distinct phases and resource types, separating measurement configuration, actual measurement execution, and result reporting. Different measurement resources can be allocated to different user equipment based on their specific interference conditions, allowing the system to optimize measurement precision for affected users while minimizing overall system overhead through targeted rather than blanket measurement approaches
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive a group common downlink control information transmission comprising a cross-link interference (CLI) measurement request indication. The network node may determine a channel state information interference measurement during an interference measurement occasion, wherein the interference measurement occasion is indicated by the CLI measurement request indication. Numerous other aspects are described.