Subband Cross-Link Interference Measurement and Reporting
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently measuring and reporting cross-link interference (CLI) between network entities on a per-subband basis, which affects system throughput and latency, especially in full-duplex or dynamic TDD operations.
Innovation Solution
Implementing signaling or configuration-based mechanisms for network entities to measure and report CLI on a per-subband basis, using indications of specific subbands and interference metrics, allowing for accurate measurement and reporting of CLI through mechanisms such as bitmap indications and resource block configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If per-subband CLI measurement is implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the frequency bandwidth into multiple subbands and performs CLI measurement independently in each subband. This is achieved by configuring measurement subbands through signaling (e.g., RRC configuration) and processing interference metrics separately for each subband, enabling precise localized measurement while managing complexity through structured segmentation.
Solution Approach 2:
The patent applies local quality by measuring and reporting CLI metrics specific to each subband rather than providing a single aggregate measurement. Each subband has its own interference metrics (e.g., CLI-RSRP, CLI-RSSI) that are measured and reported independently, allowing differentiated quality assessment across different frequency regions.
2Productivity
If subband-based CLI measurement is performed, then productivity is improved, but loss of time increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the set of subbands for measurement through signaling before actual measurement occurs. The network entity is provided with advance information about which subbands to measure, allowing efficient measurement execution without time-consuming configuration during the measurement process itself.
Solution Approach 2:
The patent enables continuous CLI measurement across multiple subbands through efficient measurement reporting mechanisms. Measurement reports can be transmitted periodically or event-triggered, allowing the system to maintain continuous monitoring of CLI conditions across different subbands without significant interruptions to useful communication time.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some aspects, a first network entity may support one or more mechanisms according to which the first network entity may measure cross-link interference (CLI) from a second network entity and report one or more interference metrics associated with the measured CLI on a per-subband basis. The first network entity may receive an indication of a set of subbands, measure a set of interference metrics associated with the indicated set of subbands, and transmit a measurement report to indicate or otherwise convey information associated with at least a subset of the measured interreference metrics. The first network entity may receive the indication of the set of subbands from a centralized unit (CU), an operations, administration, and maintenance (OAM) entity, or a neighboring base station and may transmit the measurement report to the CU, the OAM, or the neighboring base station.