Sidelink Positioning Signals for Accurate V2X Terminal Location
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Solution Overview
Problem
Existing SideLink (SL) technologies in 5G NR and LTE systems are inadequate for advanced V2X services such as positioning, despite supporting basic security-type communication.
Innovation Solution
A positioning method on SL that involves reporting various location-related information, including measurement results, identifier information, time stamp information, calibration information, and location requests, by terminals and network side devices to enhance positioning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SL technology is used for basic security communication, then communication reliability is improved, but positioning capability is lost
Solution Approach 1:
The patent extends SL technology to support multiple functions including both basic security communication and advanced positioning services. By enabling terminals to measure SL reference signals and report location information, the system achieves multi-functionality without requiring separate communication mechanisms, thus resolving the contradiction between maintaining communication reliability and gaining positioning capability.
2Measurement precision
If SL reference signal measurement is implemented for positioning, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a self-service mechanism where terminals autonomously measure SL reference signals, calculate location information, and report results without requiring complex centralized positioning infrastructure. The terminal itself performs the positioning measurements and computations, reducing overall system complexity while maintaining positioning precision through direct terminal-to-terminal or terminal-to-network measurements.
3Measurement precision
If multiple location information parameters are reported, then positioning accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts and reports only the essential location information parameters needed for positioning accuracy, such as reference signal received power (RSRP), time of arrival (ToF), and basic location coordinates. By selecting and reporting only the most critical parameters rather than all possible measurement data, the system maintains positioning accuracy while minimizing information transmission overhead and avoiding unnecessary data burden.
Data Source
AI summary
A positioning method on a SideLink (SL), a terminal, and a network side device, are provided. A first terminal reports first location information, where the first location information includes at least one of the following: a first measurement result, where the first measurement result is obtained by the first terminal by measuring a first SL reference signal used for positioning, and the first SL reference signal is sent by a second terminal and/or a network side device; a second measurement result, where the second measurement result is an additional measurement result obtained by the first terminal by measuring the first SL reference signal in addition to the first measurement result; identifier information; time stamp information; calibration information; relative distance information; absolute location information; relative location information; target event information; and a second location information request, where the second location information request is used to instruct the second terminal to report location information.