Sidelink Positioning Session Termination Mechanism
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Solution Overview
Problem
Current wireless communication systems lack a mechanism to efficiently terminate or suspend sidelink positioning sessions, which are essential for managing resource allocation and maintaining channel quality in vehicular-to-everything (V2X) communications, particularly in scenarios where channel conditions deteriorate or mobility increases.
Innovation Solution
A method and apparatus for a user equipment (UE) to participate in sidelink positioning sessions, determine when the session should be terminated or suspended based on criteria such as maximum session duration, location certainty, velocity, mobility, channel quality, and power requirements, and then communicate this decision to the involved UEs to either immediately or delayed terminate the session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink positioning sessions are continuously maintained to ensure location accuracy, then location estimation reliability is improved, but resource consumption and channel quality deteriorate under high mobility or poor channel conditions
Solution Approach 1:
The patent implements dynamic session management by allowing positioning sessions to be terminated or suspended based on real-time channel conditions and mobility parameters. The network entity or UE determines whether to continue, suspend, or terminate positioning sessions adaptively, transforming the static continuous positioning approach into a dynamic one that adjusts to current conditions, thereby maintaining reliability when needed while reducing resource consumption when conditions deteriorate.
Solution Approach 2:
The patent changes the operational parameters of positioning sessions by introducing suspension as an intermediate state between active and terminated sessions. By modifying session parameters (active, suspended, or terminated) based on mobility thresholds and channel quality metrics, the system optimizes the balance between location estimation reliability and resource consumption without requiring complete session termination until absolutely necessary.
2Productivity
If positioning sessions are terminated early to save resources when channel quality deteriorates, then resource efficiency is improved, but location estimation reliability deteriorates
Solution Approach 1:
The patent implements a suspension mechanism that acts as a cushioning intermediate state before complete session termination. When channel conditions or mobility parameters indicate deteriorating quality, the session is suspended rather than immediately terminated, preserving the positioning context and allowing for potential resumption. This beforehand cushioning prevents premature termination and maintains location estimation reliability while still enabling resource efficiency when conditions warrant termination.
3Adaptability or versatility
If multiple positioning sessions are maintained simultaneously to support multiple UEs, then service coverage is improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent extracts the decision-making function for session management from individual UEs and centralizes it in the network entity (LMF). The network entity monitors channel conditions and mobility parameters for multiple UEs and makes centralized decisions about suspending or terminating positioning sessions. This extraction of management complexity to a central controller enables support for multiple simultaneous sessions while reducing the burden on individual UEs and simplifying overall system management.
4Measurement precision
If positioning sessions continue under high mobility conditions to maintain location accuracy, then measurement precision is improved, but channel quality and resource utilization deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the network entity or UE monitors mobility parameters (speed, direction changes) and channel quality metrics during positioning sessions. Based on this feedback, the system determines when to suspend or terminate sessions under high mobility conditions. The feedback loop maintains measurement precision by continuing sessions when conditions permit while protecting channel quality by suspending or terminating sessions when mobility exceeds thresholds or channel quality deteriorates.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a method, performed by a first user equipment (UE), comprises participating in a sidelink (SL) positioning session with a second UE, determining that the SL positioning session should be terminated or suspended, and terminating or suspending the SL positioning session. In some aspects, terminating or suspending the SL positioning session may be performed via communication over a SL channel, via communication over a channel other than the SL channel, or combinations thereof. In some aspects, terminating or suspending the SL positioning session comprises terminating or suspending the SL positioning session via a multicast message, a groupcast message, a broadcast message, or a unicast message.