Dual Timing Advance Alignment for Cross-Link Interference Measurement
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Solution Overview
Problem
Wireless communications systems face challenges in managing cross-link interference (CLI) timing alignment due to full-duplexing and partial timing advance (TA) capabilities, leading to increased timing misalignment and reduced CLI measurement performance.
Innovation Solution
User equipment (UE) maintains two separate TA parameters for downlink data reception and CLI measurements, switching between them as needed, with control signaling indicating the appropriate TA values to ensure accurate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single TA parameter is used for both downlink data reception and CLI measurements, then device complexity is reduced, but timing alignment accuracy for CLI measurements deteriorates
Solution Approach 1:
The patent segments the single TA parameter into two separate TA parameters: one for downlink data reception and another for CLI measurements. This segmentation allows each TA parameter to be optimized for its specific function, thereby improving CLI measurement timing alignment accuracy while maintaining manageable device complexity through clear parameter separation.
Solution Approach 2:
The patent applies local quality by using different TA parameters for different functions. The first TA parameter is optimized for downlink data reception while the second TA parameter is specifically optimized for CLI measurements. This localized optimization ensures that each function receives the appropriate timing adjustment without compromising the other.
2Productivity
If full-duplexing capabilities are implemented, then communication efficiency is improved, but timing misalignment between communication symbols increases
Solution Approach 1:
The patent implements dynamic TA adjustment by applying different TA parameters depending on the operational mode and function. During full-duplex operation, the system dynamically selects the appropriate TA parameter (first for downlink, second for CLI measurements) to maintain timing alignment while preserving full-duplex communication efficiency.
Solution Approach 2:
The patent changes the TA parameter values based on the operational context. By adjusting the TA parameters separately for downlink data reception and CLI measurements, the system can compensate for timing misalignment introduced by full-duplexing while maintaining high communication efficiency.
3Measurement precision
If partial TA capabilities are applied, then timing alignment for specific functions is improved, but overall timing misalignment management complexity increases
Solution Approach 1:
The patent segments the timing advance management into two distinct TA parameters with clearly defined purposes. This segmentation reduces the perceived complexity by providing a structured approach where each parameter has a specific function, making the overall partial TA capability more manageable despite the increased precision requirements.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of one or more timing advance (TA) parameters to apply for receiving one or more downlink messages and for receiving reference signals associated with one or more cross-link interference (CLI) measurements. The UE may receive the one or more downlink messages by applying a first TA parameter of the one or more TA parameters during a first data reception occasion. The UE may then apply either the first TA parameter or a second TA parameter of the one or more TA parameters to receive one or more reference signals during a CLI measurement occasion. The UE may perform one or more CLI measurements based on the application of the one or more TA parameters during the CLI measurement occasion.