Sidelink Positioning Anchor Integrity Assessment
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Solution Overview
Problem
The integrity of sidelink positioning in modern mobile communications is compromised due to unreliable terminal devices acting as positioning anchors, leading to concerns about the accuracy of position-related data and the ability to provide warning messages. Current methods for collecting and processing data to address these issues are costly in terms of radio resources and computation.
Innovation Solution
A method where a terminal device receives an anchor feared event request from a coordination entity and responds with an anchor feared event response indicating factors affecting the positioning integrity of a target device. This response includes various feared event indicators such as link quality, positioning error factors, and integrity results, allowing the coordination entity to derive assistance data for the target device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data collection and processing is performed periodically and pre-emptively from all terminal devices to address integrity issues, then positioning integrity is improved, but radio resource cost and computation cost become unbearable
Solution Approach 1:
The patent applies preliminary action by having anchor devices proactively report their feared event indicators (such as link quality, positioning error factors, and integrity results) before the coordination entity needs to make positioning decisions. This allows the system to prepare integrity assessment data in advance without requiring continuous periodic collection from all devices, thus reducing real-time processing burden while maintaining integrity awareness.
Solution Approach 2:
The patent implements self-service by enabling anchor devices to autonomously assess and report their own integrity status and feared event indicators. Each anchor device independently monitors its positioning capabilities and communicates relevant metrics to the coordination entity, eliminating the need for centralized mandatory data collection from all terminal devices and significantly reducing radio resource consumption.
2Adaptability or versatility
If all terminal devices are used as positioning anchors, then positioning coverage is improved, but positioning integrity is compromised due to unreliable terminal devices
Solution Approach 1:
The patent applies local quality by differentiating the role and reliability assessment of individual anchor devices. Instead of treating all terminal devices uniformly, the system evaluates and reports specific feared event indicators (link quality, positioning error factors, integrity results) for each anchor device, allowing the coordination entity to select anchors with locally optimized quality metrics that satisfy integrity requirements.
Solution Approach 2:
The patent implements feedback mechanisms where anchor devices continuously report their feared event indicators to the coordination entity, which then uses this information to assess positioning integrity and make informed decisions about anchor selection. This feedback loop enables the system to maintain high positioning integrity while utilizing multiple terminal devices as anchors, as unreliable anchors can be identified and excluded based on real-time integrity assessments.
Data Source
AI summary
Positioning in a first terminal device that performs receiving from a coordination entity an anchor feared event request for sidelink positioning of a target device; and transmitting an anchor feared event response that indicates an integrity of the first terminal device candidate as a positioning anchor device for the target device. The anchor feared event response includes at least one of following feared event indicators: a link quality characteristic of a channel between the first terminal device and the target device; or power headroom of the first terminal device. A corresponding method in the coordinating entity, and computer program, apparatus, and non-transitory computer readable medium are also disclosed.