Sidelink Positioning Reference Signal Transmission Method
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Solution Overview
Problem
Current communication technologies do not support sidelink-based positioning, which is essential for various use cases such as vehicle-to-everything (V2X) and industrial IoT, as they lack a method for sidelink-based positioning reference signals and control information transmission.
Innovation Solution
A communication method and terminal device that transmit or receive a first positioning reference signal (PRS) and associated control information on a sidelink, enabling sidelink-based positioning by indicating the PRS and its characteristics, such as resource allocation and sequence, to support sidelink-based positioning use cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink communication is implemented without positioning support, then device-to-device communication capability is achieved, but positioning functionality is lost
Solution Approach 1:
The patent extends the sidelink communication mechanism to support positioning functions by reusing existing sidelink resources (physical sidelink shared channel, physical sidelink control channel) for transmitting positioning reference signals and positioning control information. This allows the sidelink system to perform both communication and positioning functions using the same infrastructure, achieving multi-functionality without requiring completely separate positioning infrastructure.
Solution Approach 2:
The patent introduces positioning reference signals and positioning control information transmission before actual positioning measurement occurs. The positioning reference signals are transmitted in advance to enable receiving terminals to perform positioning measurements, and positioning control information is sent beforehand to indicate positioning parameters and resource allocation. This preliminary action ensures positioning functionality is established before it is needed.
2Adaptability or versatility
If positioning reference signals are transmitted on sidelink, then sidelink-based positioning is enabled, but signal interference may increase
Solution Approach 1:
The patent segments the sidelink resources by introducing dedicated positioning reference signals that are distinct from communication reference signals. The positioning reference signals are transmitted on specific resources indicated by positioning control information, separating positioning measurements from communication data transmission. This segmentation reduces interference between positioning and communication functions by allocating distinct time-frequency resources for each purpose.
3Productivity
If control information indicating PRS is transmitted, then positioning resource allocation is optimized, but communication overhead increases
Solution Approach 1:
The patent merges positioning control information with existing sidelink control channel structures. The positioning control information that indicates positioning reference signal resources is transmitted through the physical sidelink control channel, combining positioning control functions with the existing control information framework. This merging approach allows positioning resource allocation to be handled within the existing control channel capacity, minimizing additional overhead while enabling efficient positioning resource management.
Data Source
AI summary
This application provides a communication method and a terminal device. The communication method includes: A terminal device transmits or receives a first positioning reference signal PRS and first control information on a sidelink, where the first control information indicates the first PRS.