Sidelink Synchronization Calibration for Accurate Terminal Positioning
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Solution Overview
Problem
In sidelink communication systems, synchronization timing differences between terminal devices can lead to positioning errors, affecting the accuracy and precision of location estimation due to phase shifts and cumulative errors in signal propagation delays.
Innovation Solution
The method involves acquiring synchronization information from both terminal devices to determine and correct synchronization timing differences, enabling synchronization calibration and improving positioning accuracy by processing the acquired information to refine location estimates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminal devices use different synchronization sources in sidelink communication, then system flexibility and adaptability are improved, but synchronization timing differences cause positioning errors and reduce measurement precision
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices exchange synchronization information (including timing advance values and synchronization source identifiers) with network devices. The network device uses this feedback information to calculate and provide timing adjustment parameters, enabling continuous synchronization correction and positioning accuracy improvement despite using different synchronization sources
Solution Approach 2:
The network device acts as an intermediary between terminal devices with different synchronization sources. It receives synchronization information from multiple terminals, processes the timing differences, and provides coordinated timing adjustments that harmonize the synchronization across different sources without requiring them to share the same source directly
2Device complexity
If terminal devices perform positioning without synchronization calibration, then system complexity is reduced, but positioning error accumulation increases due to phase shifts and timing differences
Solution Approach 1:
The patent performs synchronization calibration as a preliminary action before positioning operations. Terminal devices first exchange synchronization information and complete timing alignment with network devices, establishing accurate time synchronization in advance. This preliminary calibration eliminates phase shift errors during subsequent positioning measurements, improving precision without adding complexity to the positioning process itself
Data Source
AI summary
The present disclosure provides a method and a communication device for sidelink communication. One example method includes: receiving, by a first device, first information indicating at least one of synchronization information of a first terminal device or synchronization information of a second terminal device; and positioning, by the first device, a third terminal device based on the first information.