Sidelink Positioning Session Identifiers for Out-of-Coverage Terminals
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Solution Overview
Problem
Existing positioning technologies rely on Uu interface communication between user equipment and base stations, which are inadequate for scenarios where user equipment is out of network coverage, and there is a lack of efficient sidelink positioning methods for direct communication between user equipment.
Innovation Solution
A sidelink-based positioning method and apparatus that assigns or receives a positioning session identifier for sidelink positioning, enabling direct communication between user equipment terminals to perform positioning tasks without reliance on a network server, using a sidelink positioning protocol (SLPP) to establish and correlate positioning sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Uu interface positioning is used, then positioning can be performed within network coverage, but positioning fails when user equipment is out of network coverage
Solution Approach 1:
The patent segments the positioning function into two independent interfaces: Uu interface for network-based positioning and PC5 sidelink interface for direct device-to-device positioning. This segmentation allows the system to select appropriate positioning methods based on network coverage conditions, thereby improving reliability and adaptability simultaneously
Solution Approach 2:
The patent introduces a positioning session identifier as an intermediary element that enables correlation between positioning requests and positioning sessions. This intermediary allows seamless transition between Uu interface and PC5 sidelink positioning methods, ensuring continuous positioning capability regardless of network coverage status
2Productivity
If multiple positioning sessions are handled concurrently, then positioning efficiency improves, but session correlation and management become complex
Solution Approach 1:
The patent implements feedback mechanisms where the positioning session identifier is carried in SLPP messages exchanged between terminals and positioning servers. This feedback loop enables automatic correlation and tracking of multiple positioning sessions, allowing the system to manage concurrent sessions efficiently without increasing complexity
Solution Approach 2:
The patent performs preliminary assignment of positioning session identifiers before positioning operations begin. By pre-establishing unique identifiers for each positioning session, the system prepares the infrastructure needed to handle multiple concurrent sessions, reducing the complexity of real-time session management and correlation
Data Source
AI summary
This application discloses a sidelink-based positioning method and apparatus, a first terminal, and a second terminal in the field of communication technologies. The sidelink-based positioning method according to various embodiments includes: assigning, by a first terminal, a positioning session identifier corresponding to a sidelink positioning when determining to perform the sidelink positioning, or receiving, by a first terminal, a positioning session identifier that is sent by a third terminal and corresponding to a sidelink positioning; and performing, by the first terminal, the sidelink positioning based on the positioning session identifier.