Sidelink PRS Assistance for Accurate Absolute Terminal Positioning
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Solution Overview
Problem
Existing technologies lack a solution for achieving absolute positioning using sidelink or sidelink and Uu link in communication systems.
Innovation Solution
A method and apparatus for positioning an absolute location using a positioning assistance message that indicates the transmission mode of a positioning reference signal (PRS) with a predefined or configured duration from a sidelink resource, allowing terminals to receive and calculate their absolute location based on these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signals are transmitted using existing sidelink or Uu link methods, then positioning functionality is provided, but absolute positioning accuracy cannot be achieved due to lack of dedicated positioning assistance messages
Solution Approach 1:
The patent introduces a positioning assistance message as an intermediary element that carries critical positioning information (PRS transmission resources, timing, frequency) between the network and terminal. This intermediary enables accurate absolute positioning by providing dedicated positioning assistance that general communication signals cannot deliver, resolving the contradiction between measurement precision and reliability.
2Productivity
If positioning assistance messages are transmitted on sidelink resources too close to PRS transmission, then resource utilization is efficient, but signal reception reliability deteriorates due to interference
Solution Approach 1:
The patent applies preliminary action by transmitting the positioning assistance message before the actual PRS transmission occurs. This allows the terminal to prepare and configure its receiver in advance with the necessary positioning information, ensuring reliable PRS reception while maintaining efficient resource utilization. The timing relationship (first duration and second duration) ensures the assistance message is delivered early enough to avoid interference with PRS reception.
3Adaptability or versatility
If multiple positioning reference signal groups are processed simultaneously, then positioning comprehensiveness is improved, but processing capability requirements increase beyond terminal capacity
Solution Approach 1:
The patent segments the positioning reference signals into multiple distinct groups, each with specific characteristics (frequency, timing, transmission resources). This segmentation allows the terminal to process different PRS groups independently based on its capabilities and the positioning requirements, achieving comprehensive positioning coverage without overwhelming the terminal's processing capacity. Each PRS group can be handled separately within the terminal's processing limits.
Data Source
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AI summary
The present application relates to the field of sidelink communications, and discloses a positioning method and apparatus for an absolute location, a device, and a medium. The method comprises: receiving a positioning assistance message, the positioning assistance message being used for indicating a transmission mode of a positioning reference signal (PRS) (132); receiving the PRS on the basis of the positioning assistance message (134); and calculating an absolute positioning location of a target terminal on the basis of the PRS (136). Under different sidelink communication conditions, an absolute location of a target terminal itself is determined by means of a flexible PRS receiving method, thereby improving the positioning accuracy on the sidelink.