Sidelink Positioning Message Relay for PC5 Coordination Gaps
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Solution Overview
Problem
The challenge of exchanging sidelink positioning-related information between a target UE and anchor UE over the PC5 interface in a sidelink positioning architecture is not adequately addressed, particularly when the LMF needs to coordinate positioning outside network coverage.
Innovation Solution
A message exchange method is introduced where a first terminal receives a message from a network-side device containing a sidelink positioning protocol (SLPP) message, which it then forwards or processes to a second terminal, enabling the LMF to coordinate sidelink positioning by using a container-based SLPP message exchange mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the LMF directly exchanges SL positioning information with target UE or anchor UE over PC5 interface, then positioning coordination is achieved, but the system complexity and implementation difficulty increase due to lack of standardized message exchange mechanisms
Solution Approach 1:
The patent introduces a relay terminal as an intermediary node that facilitates message exchange between the LMF and positioning participants (target UE or anchor UE) over the PC5 interface. The relay terminal receives SL positioning messages from the LMF and forwards them to the appropriate terminal, eliminating the need for direct complex interactions between the LMF and positioning participants while maintaining positioning coordination capability.
2Adaptability or versatility
If SL positioning is implemented outside network coverage area, then positioning flexibility is improved, but the reliability of positioning information exchange deteriorates due to absence of network infrastructure
Solution Approach 1:
The patent enables terminals to perform self-positioning by utilizing sidelink communication capabilities directly between UEs without requiring network infrastructure support. The relay terminal autonomously handles message routing and forwarding for SL positioning, allowing positioning operations to continue reliably even when outside network coverage areas.
3Productivity
If direct LMF-to-terminal message exchange is used, then positioning speed is improved, but device complexity increases due to lack of container-based message formatting standards
Solution Approach 1:
The patent segments the message exchange process into standardized components by introducing container-based message formatting. Positioning messages are enclosed in standardized containers that define clear structures for information exchange between LMF and terminals. This segmentation approach maintains efficient positioning processing while providing standardized, manageable message formats that reduce implementation complexity.
Data Source
AI summary
A message exchange method for sidelink positioning, a terminal, and a network-side device are disclosed in the field of communication technologies. The message exchange method for sidelink positioning in embodiments of this application includes: receiving, by a first terminal, a first message sent by a network-side device, where the first message includes a first container, the first container corresponds to a first sidelink positioning protocol SLPP message, and the first SLPP message is used for sidelink positioning; and sending, by the first terminal, the first SLPP message or a second SLPP message to a second terminal based on the first message, where the second SLPP message includes a second container, and the second container corresponds to the first SLPP message.