IMR-Based Beam Failure Detection for Inter-UE Cross-Link Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in detecting and managing inter-user equipment (UE) cross-link interference (CLI) that can cause beam failure or radio link failure, leading to delayed recovery due to reliance on random access procedures.
Innovation Solution
Configuring interference measurement resources (IMRs) for beam failure monitoring, allowing UEs to detect CLI and report beam failures, enabling network entities to adjust scheduling, beams, or power settings without random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedures are used for beam recovery, then system reliability is maintained, but recovery time increases
Solution Approach 1:
The patent applies preliminary action by having the first UE proactively monitor reference signals from the second UE on interference measurement resources before beam failure occurs. The UE measures reference signal received power (RSRP) and determines CLI impact in advance, enabling faster recovery response when beam failure actually occurs, thus reducing recovery time while maintaining reliability through prepared detection mechanisms.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop system where the first UE continuously monitors reference signals, measures CLI impact, and reports beam failure conditions to the network entity. This feedback mechanism enables real-time detection and response to beam failures caused by CLI, allowing for timely recovery actions without relying on random access procedures.
2Measurement precision
If CLI monitoring is implemented, then beam failure detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by configuring the first UE to monitor reference signals from the second UE on interference measurement resources that serve dual purposes: detecting CLI impact and monitoring beam failure conditions. This multi-functional monitoring approach improves beam failure detection accuracy while avoiding the need for separate dedicated monitoring systems, thus limiting the increase in device complexity.
Solution Approach 2:
The patent implements self-service by enabling the first UE to autonomously measure reference signal received power, determine CLI impact, and assess beam failure conditions without requiring additional network entities or complex monitoring infrastructure. The UE uses its existing measurement capabilities to monitor for interference and report failures, improving detection accuracy while keeping device complexity manageable through self-contained monitoring functionality.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive a control message indicating a set of interference measurement resources (IMRs) for reference signal transmission associated with radio link monitoring or beam failure monitoring. The first UE may receive, from a second UE via the set of IMRs, reference signals associated with radio link monitoring or beam failure monitoring based on the control message. The first UE may transmit, in response to receiving the reference signals, a beam failure report associated with the radio link monitoring or the beam failure monitoring based on one or more measurements of the one or more reference signals. In some examples, the beam failure report may indicate that beam failure is associated with cross-link interference (CLI) from the second UE.