Sidelink Positioning Coordination for Out-of-Coverage Target UEs
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Solution Overview
Problem
Existing wireless communication systems face challenges in coordinating positioning sessions, especially in out-of-coverage or partial coverage scenarios, where UEs lack direct communication with base stations for sidelink resource allocation and assistance, affecting the quality of service in determining location-dependent parameters.
Innovation Solution
A target UE acts as a positioning session coordinator, selecting an anchor UE and coordinating resource assignment through a server UE to facilitate sidelink positioning, using sidelink reference signals for accurate location estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs operate in out-of-coverage or partial coverage scenarios without direct base station communication, then positioning capability is maintained, but resource allocation and coordination quality deteriorates
Solution Approach 1:
The patent introduces a positioning server as an intermediary entity that mediates between UEs in out-of-coverage scenarios and the network. The server receives positioning requests from target UEs, selects appropriate anchor UEs, allocates sidelink resources, and coordinates positioning sessions without requiring direct base station communication. This intermediary approach enables positioning capability to be maintained while improving resource allocation quality through centralized management.
Solution Approach 2:
The patent implements self-service mechanisms where target UEs autonomously initiate positioning requests, select anchor UEs based on criteria, and manage their own positioning sessions. The UE also performs self-measurement of positioning reference signals and autonomously determines location-dependent parameters. This self-service approach enables positioning in out-of-coverage scenarios while improving reliability through UE-autonomous resource management.
2Measurement precision
If target UE acts as positioning session coordinator to enable sidelink positioning, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the positioning function into distinct roles: the target UE acts as positioning session coordinator for measurement and calculation, while the anchor UE handles reference signal transmission and basic coordination. This segmentation allows the target UE to focus on accuracy-critical tasks without managing all positioning operations alone, thereby improving measurement precision while controlling device complexity through functional division.
Solution Approach 2:
The patent designs the target UE with multi-functionality to perform positioning session coordination, anchor UE selection, resource allocation, and location parameter calculation. By consolidating these functions into a single UE entity, the system achieves positioning accuracy without requiring multiple separate devices, thus managing device complexity while improving measurement precision.
3Reliability
If multiple anchor UEs are selected and coordinated for positioning, then positioning reliability is improved, but coordination complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the target UE reports measurement results and channel conditions to the positioning server, which then adjusts anchor UE selection and resource allocation in real-time. This feedback loop enables the system to maintain positioning reliability by adapting to changing conditions while managing coordination complexity through iterative optimization based on actual measurement data.
Solution Approach 2:
The patent performs preliminary actions by pre-selecting and pre-configuring anchor UEs based on stored location information and network conditions before actual positioning occurs. The positioning server pre-establishes coordination parameters and resource allocations, reducing the complexity of real-time coordination while maintaining positioning reliability through prepared anchor UE configurations.
Data Source
AI summary
An embodiment provides a server UE, especially UE acting as positioning session coordinator, having a transceiver and a controller,wherein the transceiver is configured to receive positioning request (from its higher layers or from a second entity),wherein the controller is configuredto initiate and/or maintain a positioning session for a target UE, wherein the positioning session has at least a measurement between the target UE and an anchor UE; to select out of a plurality of UEs at least one anchor UE fulfilling one or more anchor UE selection criteria; andto coordinate assignment of the configuration associated with at least one resource for transmission and/or for reception with the target UE and the anchor UE involved in the positioning session.