Sub-band Cross-Link Interference Reporting for Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately mitigating cross-link interference (CLI) due to imprecise CLI measurement reporting at a wideband granularity, which can lead to inefficient air interface resource assignments and reduced data throughput.
Innovation Solution
Implementing sub-band based CLI measurement reporting, where user equipment (UE) receives configuration information to report CLI metrics at a sub-band granularity, enabling the base station to optimize air interface resource assignments and mitigate CLI more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wideband CLI measurement reporting is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent divides the wideband CLI measurement into multiple sub-band measurements. The base station configures the UE to perform CLI measurements on individual sub-bands (e.g., first sub-band and second sub-band) and report results separately. This segmentation enables precise identification of which specific sub-bands are affected by CLI, resolving the contradiction by maintaining low device complexity through standardized measurement procedures while achieving high measurement precision through sub-band granularity.
2Measurement precision
If sub-band based CLI measurement reporting is implemented, then CLI mitigation precision is improved, but device complexity increases
Solution Approach 1:
The base station segments the frequency band into multiple sub-bands and configures the UE to perform CLI measurements on each sub-band independently. The UE reports CLI metrics (such as RSRP or RSSI) for each sub-band separately, enabling precise identification of affected sub-bands without requiring complex processing at the UE side.
Solution Approach 2:
The patent applies local quality by treating each sub-band differently based on its CLI characteristics. The base station can identify which specific sub-bands are affected by CLI and apply targeted mitigation strategies only to those sub-bands, rather than treating the entire bandwidth uniformly. This reduces unnecessary processing while maintaining precision.
3Device complexity
If wideband resource assignment is used, then device complexity is reduced, but productivity deteriorates
Solution Approach 1:
The base station segments the frequency bandwidth into multiple sub-bands and assigns resources on a per-sub-band basis. When CLI is detected in specific sub-bands, the base station can reassign resources only in those affected sub-bands while maintaining resources in clean sub-bands. This targeted approach improves productivity by maximizing spectrum utilization without requiring complex full-band resource management.
Solution Approach 2:
The patent dynamically changes resource assignment parameters (frequency sub-band, time slot, resource blocks) based on CLI measurement results. The base station adjusts resource allocation in response to detected CLI conditions, optimizing data throughput by avoiding interference-affected resources while maintaining efficient use of clean resources.
4Productivity
If sub-band based resource assignment is implemented, then data throughput is improved, but device complexity increases
Solution Approach 1:
The base station divides the frequency spectrum into multiple sub-bands and performs resource assignment independently for each sub-band. This allows targeted resource allocation in sub-bands affected by CLI while maintaining standard resource assignment procedures in unaffected sub-bands, improving throughput without requiring complex system-wide changes.
Solution Approach 2:
The patent applies different resource assignment strategies to different sub-bands based on their individual CLI conditions. Sub-bands with CLI receive adjusted resource assignments (such as frequency shifts or time slot changes), while sub-bands without CLI use standard assignment procedures, optimizing throughput with minimal additional complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive cross-link interference (CLI) configuration information that indicates a plurality of sub-bands for a CLI measurement resource. The UE may transmit a CLI report indicating at least one CLI metric associated with at least one sub-band of the plurality of sub-bands. Numerous other aspects are described.