Sidelink Positioning Feedback for SL PRS Measurement Failure
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Solution Overview
Problem
In sidelink (SL) positioning procedures, terminals often fail to measure SL positioning reference signals (PRS), leading to positioning failures.
Innovation Solution
A method where a first terminal sends indication information to a base station, LMF network element, or a second terminal when SL PRS measurement fails, preventing the SL positioning procedure from being performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SL positioning procedure is performed without checking measurement capability, then the positioning procedure can be executed continuously, but positioning failures occur when SL PRS cannot be measured
Solution Approach 1:
The patent applies preliminary action by having the first terminal determine whether an SL PRS to be received can be measured before initiating the SL positioning procedure. This pre-check includes determining if a second terminal can transmit the SL PRS and if the first terminal can receive and measure it. By performing this assessment in advance, the system avoids positioning failures while maintaining clear procedure flow.
Solution Approach 2:
The patent implements feedback by having the first terminal send indication information to the base station, LMF network element, or second terminal when the SL PRS cannot be measured. This feedback mechanism allows the system to respond appropriately to measurement failures, enabling alternative positioning methods or adjusting the positioning procedure to ensure continuous operation without failures.
2Reliability
If indication information is sent when SL PRS measurement fails, then positioning failures are prevented, but additional signaling is required
Solution Approach 1:
The patent applies self-service by having the first terminal autonomously determine whether to send indication information based on its own measurement capability assessment. The first terminal evaluates whether the SL PRS can be measured and decides independently whether to trigger the indication information transmission, reducing unnecessary signaling while ensuring reliable positioning when needed.
Data Source
AI summary
A method for sidelink (SL) positioning is executed by a terminal. The method includes: in response to an SL positioning reference signal (PRS) to be received not being measured in an SL positioning procedure, sending indication information to at least one of: a base station, a location management function (LMF) network element or a second terminal.