CLI Reporting via QCL Beam Segmentation
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Solution Overview
Problem
Existing techniques for measuring cross-link interference (CLI) in full-duplex communication systems do not account for the effects of beam selection, leading to incomplete CLI reporting and inadequate beam selection for mitigating interference.
Innovation Solution
The method involves configuring a victim user equipment (UE) to generate a CLI report for multiple beams, using quasi-co-location (QCL) information to measure interference metrics, and transmitting a subset of these metrics to the base station, along with the associated QCL information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CLI measurement is performed without considering beam selection, then the measurement process is simple, but the CLI reporting is incomplete and beam selection for interference mitigation is inadequate
Solution Approach 1:
The patent segments the CLI measurement process by associating different QCL information with different measurement resources (CSI-IM resources). Each measurement resource is configured with specific QCL information that indicates the beam relationship, allowing the UE to measure CLI on different beams separately. This segmentation enables complete CLI reporting across multiple beams while maintaining manageable configuration complexity through structured resource allocation.
Solution Approach 2:
The patent changes the measurement parameters by introducing QCL information as a configuration parameter for each measurement resource. By varying the QCL information across different CSI-IM resources, the system enables the UE to perform CLI measurements under different beam conditions. This parameter change approach allows comprehensive CLI assessment without requiring complex measurement procedures, as the beam variation is controlled through configurable parameters.
2Loss of information
If multiple beams are measured for CLI reporting, then complete CLI information is obtained, but the reporting overhead and processing complexity increase
Solution Approach 1:
The patent extracts only the essential QCL information associated with each measured CLI metric rather than reporting all possible measurement details. By taking out and reporting only the relevant QCL associations, the system achieves complete CLI information coverage across multiple beams while minimizing reporting overhead. The UE measures CLI on multiple beams but reports only the critical beam-related QCL information needed for interference mitigation decisions.
3Adaptability or versatility
If QCL information is associated with each measurement resource, then beam-specific CLI measurement is enabled, but the configuration complexity increases
Solution Approach 1:
The patent implements a universal QCL information structure that can be applied across multiple measurement resources. The QCL information serves multiple functions: it identifies beam relationships, associates measurement resources with specific beams, and provides the basis for both measurement and reporting. This multi-functional QCL configuration enables beam-specific CLI measurement without proportionally increasing complexity, as the same QCL framework serves multiple purposes throughout the measurement and reporting process.
Data Source
AI summary
A victim user equipment (UE) may experience cross-link interference (CLI) from transmissions from an aggressor UE. The present disclosure provides for configuration of a CLI report that accurately characterizes the CLI experienced by the victim UE for different beams. A base station may transmit to the victim UE, a configuration for CLI reporting associated with a plurality of measurement resources, the configuration identifying a quasi-co-location (QCL) information associated with each measurement resource. The victim UE may measure interference metrics on the plurality of measurement resources based on the configuration for CLI reporting and the QCL information associated with each measurement resource. The victim UE may transmit a CLI report to the base station, the CLI report including a subset of the interference metrics associated with reported measurement resources and identifying the QCL information associated with the reported measurement resources.