Sidelink Anchor Group Positioning for 5G V2X
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing sidelink communications for position estimation in scenarios like vehicle-to-everything (V2X) applications, where accurate and rapid positioning is crucial for autonomous driving and other intelligent transportation systems.
Innovation Solution
The method involves performing sidelink anchor registration, configuring a sidelink anchor group based on specific criteria, and transmitting sidelink PRS pre-configurations to user equipment (UE) for on-demand position estimation sessions, with assistance data and measurement reports being exchanged among position estimation entities, sidelink anchors, and UE to facilitate precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink anchor groups are configured based on multiple criteria (mobility status, position estimation accuracy) then position estimation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the sidelink anchors into distinct groups based on mobility status (mobile anchors vs. stationary anchors). This segmentation allows the system to apply different positioning strategies and criteria to different anchor groups, improving position estimation accuracy while managing device complexity through organized categorization.
Solution Approach 2:
The patent performs preliminary configuration of sidelink anchor groups before actual position estimation sessions. The network entity pre-configures anchor groups based on mobility status and position estimation accuracy criteria, so that when positioning sessions occur, the pre-organized groups can be quickly utilized without real-time complex decision-making, thus improving accuracy while controlling complexity.
2Productivity
If on-demand sidelink PRS position estimation sessions are implemented then productivity is improved, but loss of time increases due to scheduling overhead
Solution Approach 1:
The patent implements preliminary configuration of sidelink positioning reference signal (PRS) parameters and anchor group associations before on-demand positioning sessions. The network entity pre-configures PRS resources, time offsets, and anchor group mappings, so that when a UE requests positioning, the system can quickly activate pre-prepared configurations rather than setting everything from scratch, thus improving efficiency while minimizing scheduling time.
Solution Approach 2:
The patent enables UEs to autonomously initiate on-demand positioning sessions by selecting appropriate pre-configured anchor groups and PRS parameters. The UEs self-service their positioning needs by using the pre-configured resources without requiring extensive real-time network coordination, improving productivity while reducing the time lost to scheduling overhead.
3Reliability
If sidelink PRS pre-configurations are transmitted to multiple anchors then reliability is improved, but use of energy increases
Solution Approach 1:
The patent segments anchors into mobile and stationary groups, and selectively transmits sidelink PRS pre-configurations only to relevant anchor groups based on the UE's location and positioning requirements. Instead of broadcasting to all anchors, the system targets specific segments, improving reliability through focused multi-anchor coverage while reducing energy consumption by avoiding unnecessary transmissions to distant or irrelevant anchors.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a position estimation entity configures a sidelink anchor group with sidelink anchor(s), to which respective sidelink PRS pre-configuration(s) are sent. A UE transmits a request to schedule an on-demand sidelink PRS position estimation session of the UE. The position estimation entity provides the UE with assistance data associated with the sidelink anchor group for the on-demand sidelink PRS position estimation session. The UE sends the sidelink anchor group a sidelink PRS trigger to perform a sidelink PRS exchange with some or all of the sidelink anchor group in accordance with the respective sidelink PRS pre-configuration(s).