Sidelink Positioning Reference Signal Multiplexing
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Solution Overview
Problem
In sidelink communication, effective positioning reference signals need to be transmitted, but existing technologies face challenges when sidelink channels are also present, leading to difficulties in transmitting these signals effectively.
Innovation Solution
A wireless communication method where a first terminal device transmits at least one reference signal and one sidelink channel to a second terminal device within a specific time unit, using the reference signal for absolute and/or relative positioning, allowing for effective multiplexing and reduced impact on channel sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signals are transmitted on sidelink, then positioning accuracy is improved, but interference with sidelink channel transmission increases
Solution Approach 1:
The time unit is divided into distinct regions: some symbols are allocated for sidelink channel transmission while other symbols are allocated for positioning reference signal transmission. This segmentation allows both functions to operate simultaneously without mutual interference, resolving the contradiction between positioning accuracy and channel transmission quality.
Solution Approach 2:
The solution moves from time-domain multiplexing to frequency-domain or spatial-domain separation by allocating different symbols within the time unit for different purposes. This dimensional approach allows positioning reference signals and sidelink channels to coexist without interfering with each other's performance.
2Productivity
If reference signals and sidelink channels are transmitted in the same time unit, then resource utilization is improved, but signal interference increases
Solution Approach 1:
Within each time unit, specific symbols are segmented for sidelink channel transmission while other symbols are dedicated to positioning reference signals. This segmentation enables both signals to share the same time unit resources without causing harmful interference, thus improving resource utilization while maintaining signal quality.
Solution Approach 2:
The transmission pattern follows a periodic structure where symbols are alternately allocated for different purposes. This periodic allocation ensures that reference signals and sidelink channels are transmitted in an organized manner, maximizing resource usage while preventing signal interference through predictable, non-overlapping transmission intervals.
Data Source
AI summary
A wireless communication method includes: transmitting, by a first terminal device, at least one reference signal and at least one sidelink channel to a second terminal device within a first time unit. The at least one reference signal is used for the absolute positioning and/or relative positioning.