Sidelink Positioning Anchor Selection
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Solution Overview
Problem
Existing sidelink positioning systems face challenges in efficiently configuring and re-configuring sidelink positioning resources, especially under dynamic channel conditions and when target UEs are moving relative to anchor UEs, leading to high latency and signaling overhead.
Innovation Solution
The proposed solution involves an apparatus that maintains capability information for sidelink positioning sessions and manages the process of discovering available anchor UEs, determining their availability, and selecting them for involvement in sidelink positioning sessions, thereby reducing the need for extensive signaling and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sidelink positioning systems configure and re-configure positioning resources under dynamic channel conditions, then positioning accuracy is maintained, but signaling overhead and latency increase significantly
Solution Approach 1:
The system performs preliminary actions by pre-configuring positioning resources and maintaining capability information before positioning sessions are needed. Anchor UEs prepare their positioning capabilities and resource allocations in advance, so when a positioning session is required, the configuration is already in place or can be quickly activated, avoiding time-consuming re-configuration during dynamic channel conditions.
Solution Approach 2:
The patent uses copying by maintaining capability information copies at multiple UEs. The serving UE copies and stores capability information of anchor UEs, and anchor UEs copy relevant positioning parameters and configuration data. This allows rapid deployment of positioning sessions without extensive real-time signaling, as the necessary configuration data is already available locally as copies.
2Measurement precision
If traditional sidelink positioning systems configure and re-configure positioning resources under dynamic channel conditions, then positioning accuracy is maintained, but signaling overhead increases
Solution Approach 1:
Capability information and positioning parameters are exchanged and stored in advance during preliminary actions. Anchor UEs publish their capability information (supported positioning methods, measurement capabilities, resource requirements) before positioning sessions are established. This preliminary exchange eliminates the need for repeated signaling during session setup and re-configuration, reducing overall signaling overhead while maintaining positioning accuracy.
Solution Approach 2:
The system reduces signaling overhead by using copied capability information stored at serving UEs and anchor UEs. Instead of repeatedly transmitting configuration parameters and capability data during each positioning session setup, the system retrieves and uses previously copied information, significantly reducing the volume of signaling messages required while ensuring positioning accuracy is maintained.
3Productivity
If extensive signaling is used to configure sidelink positioning sessions, then positioning resource allocation is optimized, but communication overhead and latency increase
Solution Approach 1:
The patent implements copying of capability information and positioning parameters between UEs. Serving UEs copy and store capability information of anchor UEs, and anchor UEs copy relevant positioning configuration data. This copying mechanism enables efficient resource allocation without requiring extensive real-time signaling, as the necessary information is already available locally, reducing communication overhead while maintaining allocation efficiency.
Solution Approach 2:
The system enables self-service by allowing UEs to autonomously retrieve and use stored capability information for positioning session configuration. Anchor UEs self-advertise their capabilities, and serving UEs self-select appropriate anchor UEs based on stored information, reducing the need for centralized coordination and extensive signaling while maintaining efficient resource allocation.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
There is herein provided a method. The method includes maintaining capability information for a first sidelink positioning session supported by a second apparatus and receiving, at the apparatus from the second apparatus, a response message, the response message being a response to a discovery message, and the discovery message being a request for a second sidelink positioning session for positioning a third apparatus. The method includes determining that the second apparatus is available for supporting the second sidelink positioning session and transmitting, from the first apparatus, a selection message indicating that the second apparatus has been selected for involvement in the second sidelink positioning session