Autonomous UE-to-UE CLI Detection Using Existing Reference Signals
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Solution Overview
Problem
Current CLI reporting schemes in subband-full duplex networks require dedicated resources, leading to resource usage overhead and inefficient detection of UE-to-UE cross link interference, which is exacerbated by dynamic scheduling changes in full-duplex communication.
Innovation Solution
Implementing autonomous detection and reporting of UE-to-UE cross link interference using existing reference signals and channels, allowing UEs to report interference measurements without dedicated resources, and configuring event-triggered or periodic reporting based on interference thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated CLI measurement resources are allocated to multiple UEs for CLI measurements, then CLI detection accuracy is improved, but resource usage overhead increases
Solution Approach 1:
The patent makes existing reference signals and channels serve dual purposes: their primary function for data communication and an additional function for CLI measurement. By configuring UEs to perform CLI measurements on routinely used reference signals (such as CSI-RS, SRS, or DMRS) and channels (such as PDSCH or PUSCH), the system eliminates the need for separate dedicated CLI measurement resources. This multi-functional approach allows the same time-frequency resources to be used for both data transmission and interference measurement, thereby improving resource utilization efficiency while maintaining CLI detection capability.
2Loss of time
If frequent CLI measurements are performed to capture dynamic CLI conditions, then CLI detection timeliness is improved, but resource usage overhead increases
Solution Approach 1:
The patent enables continuous CLI monitoring by utilizing reference signals and channels that are continuously transmitted during normal data communication. Since these reference signals (e.g., periodic CSI-RS) and channels are already part of the ongoing data transmission process, the UE can continuously perform CLI measurements without requiring additional periodic resource allocations. This continuous measurement approach ensures timely detection of dynamic CLI conditions while avoiding the overhead of separate dedicated measurement resources.
Solution Approach 2:
The system leverages the existing data communication infrastructure to automatically provide CLI measurement capability. The routinely transmitted reference signals and channels serve themselves dual purposes: maintaining data communication while simultaneously enabling CLI measurement. This self-service mechanism eliminates the need for separate resource allocation for CLI measurements, as the existing communication resources inherently provide the measurement function.
3Adaptability or versatility
If multiple UEs are configured with dedicated CLI measurement resources, then CLI measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent reduces device complexity by making the UE's existing communication infrastructure multi-functional. The UE continues to use standard reference signals and channels for their primary purposes while simultaneously utilizing them for CLI measurements. This approach avoids the need for separate dedicated CLI measurement configurations, reducing the complexity of resource management and configuration procedures while maintaining comprehensive CLI measurement capability across multiple UEs.
Data Source
AI summary
Techniques pertaining to autonomous detection and reporting of user equipment (UE)-to-UE cross link interference (CLI) are described. A UE detects that a value of an interference measurement for at least one of one or more reference signals or one or more channels used by the UE to communicate with a network node indicates that an interference has exceeded an interference threshold. In response to the detecting, the UE then reports the value of the interference measurement to the network node as a CLI measurement of UE-to-UE CLI experienced by the UE.