User Device Positioning Reference Signal via Sidelink
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Solution Overview
Problem
In the Internet of Vehicles (IoV) system, existing technologies face challenges in efficiently sending and receiving positioning signals between user devices, particularly in achieving high spectral efficiency and low transmission delay for accurate vehicle positioning.
Innovation Solution
The method involves user devices sending and receiving positioning reference signals through a physical sidelink control channel (PSCCH) and/or physical sidelink shared channel (PSSCH), where the information transmission on these channels indicates relevant attributes of the positioning reference signal, such as time position, frequency position, and signal sequence, allowing for implicit or explicit determination of the signal characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If satellite positioning technology is used for vehicle positioning, then positioning capability is provided, but transmission delay is high and spectral efficiency is low
Solution Approach 1:
The patent introduces positioning reference signals as intermediary elements that enable direct device-to-device positioning measurements. Instead of relying solely on satellite positioning, user devices transmit positioning reference signals that other devices can measure directly, creating an intermediary positioning mechanism that reduces dependency on satellite infrastructure and lowers transmission delay while improving spectral efficiency through direct local measurements
2Productivity
If direct device-to-device communication is implemented for positioning, then spectral efficiency improves and transmission delay reduces, but device complexity increases
Solution Approach 1:
The patent makes user devices multi-functional by enabling them to both transmit and receive positioning reference signals through their existing communication interfaces. The same communication interface used for regular data transmission is also utilized for positioning signal exchange, eliminating the need for separate dedicated positioning hardware and reducing overall device complexity while maintaining direct device-to-device positioning capabilities
3Measurement precision
If positioning reference signal attributes are explicitly transmitted, then positioning precision improves, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential positioning information from the positioning reference signal attributes and transmits only what is necessary for accurate positioning measurements. By selecting and transmitting only the critical attributes needed for positioning rather than all possible signal characteristics, the system achieves high positioning precision while minimizing information transmission overhead
Data Source
AI summary
The present application relates to the field of wireless communications. Disclosed are a user device and a method for the inter-user-device sending and receiving of a positioning signal. In the present application, a first user device sends a positioning reference signal on a communication interface, and performs information transmission on a physical sidelink control channel (PSCCH) and/or a physical sidelink shared channel (PSSCH), wherein the information transmission on the PSCCH and/or PSSCH indicates a relevant attribute of the positioning reference signal. By means of direct communication between a user device and another user device, mutual positioning between the user devices is achieved, thereby achieving higher spectral efficiency and lower transmission delay, so that a higher positioning precision can be reached.