Cross-Link Interference Measurement Across Selected Receive Beams
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently measuring and mitigating cross-link interference (CLI) across multiple directions, which can lead to inefficient beam pairing and TDD configuration, increased interference, and reduced system performance.
Innovation Solution
A user equipment (UE) measures CLI in multiple receive directions using configured resources and beams, such as CSI-RSs and SSBs, and reports these measurements to the base station, allowing for more efficient beam selection and TDD adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CLI measurement is performed in multiple directions, then interference mitigation capability is improved, but device complexity and measurement overhead increase
Solution Approach 1:
The patent segments the CLI measurement process by dividing it into multiple directional measurements using different receive beams. Instead of a single omnidirectional measurement, the system performs segmented measurements along multiple spatial directions, allowing comprehensive interference assessment while organizing the complexity into manageable directional components
Solution Approach 2:
The patent introduces a spatial dimension to CLI measurements by utilizing multiple receive beams oriented in different directions. This transforms the measurement from a single-point assessment to a multi-dimensional spatial assessment, enabling the system to identify and mitigate interference from specific directions while maintaining organized measurement complexity
2Measurement precision
If multiple receive beams are used for CLI measurement, then measurement precision is improved, but processing time and resource consumption increase
Solution Approach 1:
The patent applies preliminary action by having the UE identify and select a subset of receive beams for CLI measurement before the actual measurement process. The base station configures the available receive beams in advance, and the UE pre-identifies which beams to use based on downlink signal reception patterns, thereby reducing the real-time processing burden during CLI measurement
Solution Approach 2:
The patent implements partial action by having the UE measure CLI on a selected subset of receive beams rather than all available beams. The UE identifies receive beams used for downlink signal reception and performs CLI measurement on those specific beams, performing measurements on only the necessary portion of available beams to achieve sufficient precision without exhaustive processing
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, a base station may configure one or more cross-link interference measurement resources on which a user equipment (UE) is to measure CLI. The UE may measure CLI from a single aggressor UE in multiple receive directions. The UE may identify receive beams on which it receives other signal types, and use those receive beams to measure CLI. In some examples, the base station may explicitly indicate to the UE which receive beams it is to use for CLI measurements. The UE may measure CLI on each CLI measurement resource using the identified receive beam, and may transmit, to the base station, a CLI report including CLI measurements, an indication of resource on which CLI measurements were taken, or a combination thereof.