Sidelink Ranging for Accurate Relative Position Between Terminals
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Solution Overview
Problem
Existing wireless communication technologies lack efficient methods for determining the relative position between terminals, such as mobile phones and vehicles, which is crucial for enhancing user experience in scenarios like large parking lots.
Innovation Solution
A ranging method using a sidelink interface between terminals, involving the exchange of ranging request and feedback signals to measure relative position, including distance and angle, with options for secure and non-secure connections, and single-sided or double-sided ranging methods based on specific service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing wireless communication technologies are used for terminal positioning, then basic communication can be established, but relative positioning between terminals cannot be accurately determined
Solution Approach 1:
The patent introduces a dedicated ranging message format as an intermediary mechanism between terminals. This ranging message includes specific fields for carrying ranging parameters and measurement results, enabling precise relative positioning without requiring complex infrastructure modifications. The intermediary message structure allows terminals to exchange positioning information efficiently through the existing PC5 interface.
Solution Approach 2:
The positioning function is segmented into independent ranging operations that can be performed between terminals. The patent divides the positioning process into discrete steps: sending ranging requests, receiving ranging responses, measuring time differences, and calculating relative positions. This segmentation allows the positioning functionality to be implemented as a modular addition to existing communication protocols.
2Reliability
If secure connection is implemented for ranging, then data transmission security is improved, but connection establishment complexity increases
Solution Approach 1:
The patent implements dynamic connection establishment where the security mode can be adjusted based on service requirements. The system can operate in secure mode when authentication is needed and in non-secure mode for simpler ranging operations. This dynamic approach allows the connection establishment complexity to be optimized according to the specific positioning task rather than always requiring full security protocols.
Solution Approach 2:
The patent changes the security parameter of the connection based on the ranging service requirements. By allowing flexible configuration of security modes (secure vs. non-secure), the system can adapt the connection establishment complexity to match the actual security needs of the positioning application, avoiding unnecessary complexity when full security is not required.
3Speed
If single-sided ranging is used, then positioning speed is improved, but positioning accuracy may be reduced
Solution Approach 1:
The patent implements partial action through single-sided ranging where only one terminal performs the ranging measurements while the other terminal responds with timing information. This partial approach speeds up the positioning process by eliminating the need for both terminals to perform full ranging operations, while still achieving sufficient accuracy for many applications through the use of precise timing measurements and multiple signal transmissions.
Data Source
AI summary
A ranging method performed by a first communication node includes send a ranging request message for ranging. The ranging request message carries a ranging parameter. The ranging parameter is configured to measure a relative position between the first communication node and a second communication node. A ranging method performed by a second communication node includes receiving a ranging request message for ranging sent by a first communication node. The ranging request message carries a ranging parameter. The ranging parameter is configured to measure a relative position between the first communication node and the second communication node.