SL PRS Configuration Negotiation for Accurate Sidelink Positioning
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Solution Overview
Problem
Existing communication systems lack a negotiation mechanism for sidelink positioning reference signal (SL PRS) resource configuration between terminal devices and positioning assistance devices, leading to low accuracy in SL PRS configuration and subsequent positioning.
Innovation Solution
A method and apparatus for negotiating a sidelink positioning reference signal (SL PRS) configuration by determining a first SL PRS configuration through negotiation with a second device and sending it to a first terminal device upon satisfying a preset condition, involving various devices such as network-side devices, LMFs, and candidate positioning assistance terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a negotiation mechanism for SL PRS configuration is introduced between terminal devices and positioning assistance devices, then the accuracy of SL PRS configuration determination is improved, but the device complexity and communication overhead increase
Solution Approach 1:
The patent introduces a network device as an intermediary to facilitate the negotiation between the terminal device and positioning assistance device. The network device receives configuration requests, determines appropriate SL PRS configurations, and communicates them back to the terminal device, thereby improving configuration accuracy while managing system complexity through centralized coordination
Solution Approach 2:
The configuration negotiation process is segmented into distinct phases: capability indication phase where the terminal device indicates its positioning capabilities, configuration request phase where specific SL PRS configuration parameters are negotiated, and configuration determination phase where the final configuration is established. This segmentation makes the complex negotiation process more manageable and systematic
2Measurement precision
If multiple positioning assistance terminal devices are involved in absolute positioning and relative positioning, then the positioning accuracy is improved, but the quantity of devices and configuration complexity increase
Solution Approach 1:
The patent enables positioning assistance terminal devices to perform multiple functions: they can assist in both absolute positioning and relative positioning scenarios, and each device can serve multiple terminal devices simultaneously. This multi-functionality allows the system to achieve high positioning accuracy using a manageable number of assistance devices rather than requiring dedicated assistance for each positioning scenario
Solution Approach 2:
The patent negotiates and optimizes multiple SL PRS configuration parameters including resource allocation, signal periodicity, and transmission power levels. By carefully adjusting these parameters across the network of positioning assistance devices, the system achieves high positioning accuracy while efficiently utilizing the available devices without requiring excessive quantities
Data Source
AI summary
A method for negotiating a sidelink positioning reference signal (SL PRS) configuration, performed by a first device, includes: negotiating with a second device to determine a first SL PRS configuration, the first SL PRS configuration indicating for SL positioning; and sending the first SL PRS configuration to a first terminal device in response to satisfying a preset condition.