Cross-Link Interference Reporting Using Adaptive Downlink Thresholds
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Solution Overview
Problem
Existing CLI reporting mechanisms based on constant thresholds lead to inefficient resource consumption due to excessive or insufficient reporting, failing to account for the UE's tolerance to CLI and varying CLI conditions, particularly in dynamic TDD and SBFD schemes.
Innovation Solution
A terminal device adjusts the CLI reporting threshold based on downlink channel quality, using metrics such as DL SINR, MCS, QoS, and CQI to adaptively control when CLI reports are transmitted, reducing unnecessary reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a constant threshold is used for CLI reporting, then the reporting mechanism is simple to implement, but resource consumption increases due to excessive or insufficient reporting
Solution Approach 1:
The patent implements dynamic threshold adjustment by modifying the CLI reporting threshold based on downlink channel quality metrics (SINR, MCS, CQI). The threshold transitions from a fixed constant value to a dynamic value that adapts to changing channel conditions, thereby reducing unnecessary reporting while maintaining detection accuracy.
Solution Approach 2:
The patent changes the parameter of the reporting threshold from a static constant to a dynamic parameter that varies with downlink channel quality. By adjusting the threshold parameter based on measured channel metrics, the system optimizes the balance between reporting accuracy and resource consumption.
2Device complexity
If a constant threshold is used for CLI reporting, then the implementation is straightforward, but reporting accuracy decreases due to inability to account for varying CLI conditions
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device measures downlink channel quality (SINR, MCS, CQI) and uses these measurements to adjust the CLI reporting threshold. This closed-loop feedback ensures that the threshold adapts to actual channel conditions, improving reporting accuracy while accounting for varying CLI environments.
Solution Approach 2:
The terminal device autonomously adjusts its own CLI reporting threshold based on its measured downlink channel quality, without requiring external network configuration for each threshold adjustment. This self-service approach improves accuracy while keeping the implementation relatively simple.
3Productivity
If event-triggered UE-to-UE CLI measurements are used, then reporting is optimized based on CLI events, but resource efficiency decreases when thresholds do not account for UE tolerance to CLI
Solution Approach 1:
The patent applies local quality by adjusting the CLI reporting threshold according to the specific downlink channel quality conditions at each terminal device. Each device uses its own measured channel metrics (SINR, MCS, CQI) to determine an appropriate threshold, rather than using a uniform network-wide threshold, thereby optimizing reporting for local conditions.
Data Source
AI summary
Embodiments of the present disclosure relate to cross-link interference (CLI) reporting. In an aspect, a terminal device receives, from a network device, a CLI measurement configuration indicating that a threshold for CLI reporting is adjustable. The terminal device further adjusts the threshold based on downlink (DL) channel quality, and transmits, to the network device, a CLI report based on a CLI measurement and the adjusted threshold. In this way, the CLI reporting can be triggered based on the adaptive threshold efficiently, thus transmissions of the unnecessary CLI reporting can be reduced.