Timing Offset Adjustment for Wireless Device CLI Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in accurately measuring Cross-Link Interference (CLI) due to the lack of consideration for adjusting the reception timing of Sounding Reference Signals (SRS) in existing systems, which affects the accuracy of SRS-RSRP measurements and hinders effective interference handling in Time Division Duplex (TDD) networks.
Innovation Solution
The proposed solution involves communicating a timing offset value to wireless devices to adjust their uplink transmissions relative to their downlink reception timing, based on the timing offset used by another wireless device in another cell, to improve the accuracy of CLI measurements, specifically for SRS-RSRP measurements, by aligning the timing of uplink transmissions with the downlink reception timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing offset adjustment is not applied to SRS reception timing, then the system operation is simple, but the CLI measurement accuracy deteriorates
Solution Approach 1:
The network node calculates and provides timing offset values to wireless devices before CLI measurements are performed. This preliminary timing adjustment ensures that SRS signals from different cells are received at the correct timing, enabling accurate CLI measurements without requiring complex real-time adjustments during measurement operations.
2Measurement precision
If timing offset is adjusted based on another cell's timing, then the CLI measurement accuracy improves, but the system complexity increases
Solution Approach 1:
The network node acts as an intermediary that receives timing offset information from one cell and provides appropriate timing offset values to wireless devices in another cell. This intermediary approach enables accurate inter-cell timing alignment without requiring direct complex coordination between wireless devices across different cells, simplifying the overall system architecture.
3Object-affected harmful factors
If guard period is increased to prevent DL-to-UL interference, then interference protection improves, but the uplink transmission time decreases
Solution Approach 1:
The system dynamically adjusts the timing offset parameter for SRS reception based on the guard period configuration and cell-specific timing requirements. By changing the timing offset parameter rather than uniformly increasing guard periods across all cells, the system maintains adequate interference protection while preserving uplink transmission time and improving CLI measurement accuracy.
Data Source
AI summary
Methods, wireless devices (WD), and network nodes are disclosed. For example, there is disclosed a network node configured to communicate with a wireless device in a cell. The network node is further configured to, and/or includes a radio interface and/or includes processing circuitry configured to communicate a timing advance offset to the wireless device for adjusting the uplink transmission relative to the downlink reception in the cell. The timing offset is based on the timing offset used by another wireless device in another cell to adjust the timing of uplink transmission relative to the downlink reception timing. Furthermore, the cells are configured to operate using TDD configurations.