Cross-Link Interference Measurement Resources for Flexible Subband Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing Cross-Link Interference (CLI) due to self-interference and CLI issues arising from full duplex operations, which degrade signal quality and increase latency.
Innovation Solution
Implementing flexible CLI measurement and reporting schemes by configuring UEs with different CLI-RS measurement and reporting resources, including varying subbands and reporting types, and enabling activation/deactivation based on triggering conditions and network messages to balance measurement granularity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex operations are implemented to increase system capacity and reduce latency, then productivity is improved, but self-interference and CLI issues arise that degrade signal quality
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and divides CLI measurement resources across different subbands. This allows the system to perform targeted interference measurements in specific frequency regions affected by full duplex operations, enabling selective mitigation strategies that preserve overall system capacity while improving signal quality in problematic areas.
Solution Approach 2:
The patent dynamically adjusts CLI measurement parameters including measurement bandwidth, reporting granularity, and resource allocation based on detected interference conditions. By changing these parameters adaptively, the system optimizes the balance between maintaining high system capacity through full duplex operations and ensuring adequate signal quality through targeted interference management.
2Measurement precision
If CLI measurement resources are increased to improve measurement precision, then measurement precision is improved, but power consumption and device complexity increase
Solution Approach 1:
The patent divides CLI measurement resources into multiple subband-specific measurement opportunities rather than requiring wideband measurements. This segmentation allows the UE to perform focused measurements in specific frequency regions where interference is most likely to occur, achieving adequate measurement precision with reduced overall measurement burden and lower power consumption.
Solution Approach 2:
The patent implements selective CLI measurement where the UE performs measurements only in subbands where interference is detected or expected, rather than continuously measuring all frequency resources. This partial action approach maintains measurement precision where needed while significantly reducing power consumption by avoiding unnecessary measurements in clean frequency regions.
3Adaptability or versatility
If multiple CLI reporting resource types with different subband granularities are configured, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent configures the UE with multiple CLI reporting resource types that can be dynamically activated or deactivated based on current interference conditions and network requirements. The network can switch between wideband and subband reporting modes, allowing the system to adapt to varying interference scenarios while the UE only maintains complexity for currently active reporting configurations rather than all possible modes simultaneously.
Solution Approach 2:
The patent designs a unified CLI measurement and reporting framework where a single measurement configuration can serve multiple reporting purposes. The same CLI measurement resources can be used to generate both wideband and subband reports depending on which reporting resources are activated, reducing the need for separate measurement mechanisms and thereby lowering UE complexity while maintaining reporting flexibility.
Data Source
AI summary
Various aspects of the present disclosure relate to resources for Cross-Link Interference (CLI) measurement and reporting. An apparatus, such as a user equipment (UE), receives from a network equipment (NE) a configuration message for UE-to-UE CLI measurement and reporting, the configuration message including two or more CLI reference signal (RS) (CLI-RS) measurement resources and CLI reporting resources associated with a different number of subbands and different CLI reporting resource types. The UE performs CLI measurement based at least in part on one or more of the CLI-RS measurement resources or the CLI reporting resources to generate a CLI report, and transmits, to the NE, the CLI report using one or more CLI reporting resources of the different CLI reporting resource types.