Sidelink Positioning Information Splitting for V2X Range Determination
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Solution Overview
Problem
In sidelink communication systems, particularly for NR V2X, there is a need to transmit positioning information to determine the communication range between wireless devices, but existing methods fail to accurately identify the distance between devices, hindering service quality and reliability.
Innovation Solution
A method where a wireless device determines its positioning information, splits it into fast-varying and slow-varying components, and transmits the former via sidelink control information (SCI) and the latter via a data unit on the sidelink shared channel (SL-SCH), allowing efficient communication range determination and service quality support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If positioning information is transmitted via sidelink control information (SCI), then transmission efficiency is improved, but information completeness deteriorates
Solution Approach 1:
The positioning information is divided into two parts: first positioning information transmitted via SCI (sidelink control information) and second positioning information transmitted via SL-SCH (sidelink shared channel). This segmentation allows critical positioning data to be sent efficiently through control channels while detailed information is transmitted through data channels, resolving the contradiction between transmission efficiency and information completeness.
2Loss of information
If positioning information is transmitted via data unit on SL-SCH, then information completeness is improved, but transmission efficiency deteriorates
Solution Approach 1:
The positioning information is divided into two parts: first positioning information transmitted via SCI (sidelink control information) and second positioning information transmitted via SL-SCH (sidelink shared channel). This segmentation allows critical positioning data to be sent efficiently through control channels while detailed information is transmitted through data channels, resolving the contradiction between transmission efficiency and information completeness.
3Loss of information
If all positioning information is transmitted together, then information completeness is improved, but communication overhead increases
Solution Approach 1:
The positioning information is divided into two parts: first positioning information transmitted via SCI (sidelink control information) and second positioning information transmitted via SL-SCH (sidelink shared channel). This segmentation allows critical positioning data to be sent efficiently through control channels while detailed information is transmitted through data channels, resolving the contradiction between transmission efficiency and information completeness.
Solution Approach 2:
The patent transmits different parts of positioning information through different communication dimensions/channels (SCI vs. SL-SCH), utilizing multiple transmission dimensions to deliver complete information while optimizing overhead distribution across different channel types.
Data Source
AI summary
A method and apparatus for transmitting positioning information in sidelink communication system is provided. A first wireless device determines positioning information of the first wireless device based on a position of the first wireless device. A first wireless device split the positioning information into first positioning information and second positioning information. A first wireless device transmits, to a second wireless device, the first positioning information via sidelink control information (SCI). A first wireless device transmits, to the second wireless device, the second positioning information via a data unit.