UE Sensing Control for Inter-UE Cross-Link Interference
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, full-duplex operations between user equipment (UEs) lead to inter-user equipment (UE) interference (CLI) due to concurrent transmission and reception, which affects communication quality, spectrum usage, and resource utilization.
Innovation Solution
UEs and network nodes implement sensing mechanisms to detect potential CLI, refraining from transmitting or receiving signals in certain time periods to mitigate interference, thereby improving communication quality and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex operations are implemented between UEs, then communication efficiency and resource utilization are improved, but inter-UE interference (CLI) increases
Solution Approach 1:
The patent applies preliminary action by implementing sensing mechanisms that detect potential CLI before actual interference occurs. UEs perform sensing operations in advance to identify time periods where CLI may happen, and proactively refrain from transmitting or receiving signals during those periods, preventing interference before it degrades communication quality
Solution Approach 2:
The patent implements feedback through continuous sensing mechanisms that monitor downlink transmissions and uplink scheduling information. UEs measure signal metrics of downlink transmissions, compare them against thresholds, and use this feedback to dynamically adjust their transmission and reception behavior, creating a closed-loop system that adapts to changing interference conditions
2Reliability
If UEs refrain from transmitting or receiving signals during certain time periods to mitigate CLI, then communication quality is improved, but resource utilization decreases
Solution Approach 1:
The patent applies partial action by having UEs refrain from transmission or reception only during specific time periods where CLI is detected, rather than continuously. The sensing mechanisms identify particular time slots with interference potential, and mitigation actions are applied selectively to those portions of time, allowing normal operations to continue during interference-free periods
Solution Approach 2:
The patent implements dynamics through adaptive sensing and mitigation strategies that adjust to changing channel conditions. The sensing mechanisms continuously monitor signal metrics and compare them against thresholds, dynamically determining when CLI mitigation is necessary. This allows the system to flexibly transition between normal operation and mitigation modes based on real-time conditions
Data Source
AI summary
Aspects described herein relate to mitigating interference between user equipment (UE) based on sensing signals from serving network nodes. In some aspects, a signal metric of a downlink transmission from a victim serving network node that serves a victim UE can be measured, and an uplink transmission can be transmitted or refrained from transmitting to a serving network node that serves the aggressor UE based on comparing the signal metric to a threshold related to inter-UE cross link interference. In other aspects, a signal metric of a downlink control information (DCI) from an aggressor network node that schedules uplink transmission for an aggressor UE can be measured and a downlink transmission can be received or refrained from receiving from a serving network node that serves the victim UE based on comparing the signal metric to a threshold related to inter-UE cross link interference.