Sidelink Positioning Server Selection for Out-of-Coverage UEs
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Solution Overview
Problem
In out-of-coverage scenarios for sidelink positioning, there is no network element like LMF to control SL-PRS configuration and perform unified aggregation, making it challenging to achieve accurate positioning between UEs.
Innovation Solution
A terminal equipped with a processor, transceiver, and memory, capable of determining and selecting an SL positioning server UE to perform SL positioning service functions, including receiving requests, transmitting messages, and measuring SL-PRS to calculate positioning results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SL positioning is performed in out-of-coverage scenarios without LMF network element, then positioning service can be provided in OOC areas, but positioning accuracy and unified aggregation cannot be guaranteed
Solution Approach 1:
The patent introduces an SL positioning server UE as an intermediary entity that performs the positioning calculation function in OOC scenarios. This server UE receives positioning assistance information from multiple anchor UEs, performs unified aggregation and calculation, then returns positioning results to the target UE, thereby enabling accurate positioning without network LMF coverage.
Solution Approach 2:
The patent enables UEs to autonomously perform positioning functions in OOC scenarios by selecting and utilizing other UEs as positioning servers. The target UE independently discovers candidate anchor UEs, selects an SL positioning server UE, and obtains positioning results without requiring network control,实现ing self-service positioning in uncontrolled environments.
2Adaptability or versatility
If UEs autonomously determine SL positioning server UE in OOC scenarios, then positioning can be achieved without network control, but device complexity and selection process become more complex
Solution Approach 1:
The patent implements preliminary actions by having the target UE discover and evaluate candidate anchor UEs before selecting the SL positioning server UE. The UE performs preliminary assessments including checking candidate UEs' positioning capabilities, signal quality, and availability, then selects the most suitable server from pre-evaluated candidates, simplifying the overall selection process.
Solution Approach 2:
The patent incorporates feedback mechanisms where the target UE receives positioning assistance information from multiple anchor UEs, evaluates their performance and reliability, and uses this feedback to select the optimal SL positioning server UE. The feedback loop enables intelligent selection based on actual positioning service quality rather than random or static selection.
Data Source
AI summary
Provided is a terminal applicable to an SL positioning service scenario, wherein the terminal is applied in a target UE, and the terminal includes: a processor, a transceiver connected to the processor, and a memory configured to store one or more executable instructions of the processor; wherein the processor is configured to load the one or more executable instructions to cause the terminal to: receive a ranging/SL positioning service request; and determine an SL positioning server UE, wherein the SL positioning server UE is a UE used to implement an SL positioning service function.