Sidelink Ranging Signal Subband Segmentation for Lower Interference
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Solution Overview
Problem
In sidelink communication, the geographic locations of terminal devices cannot be pre-arranged, leading to significant differences in signal path losses and interference between ranging signals due to in-band emission, which affects positioning accuracy.
Innovation Solution
Transmit ranging signals in multiple times, each occupying a different subband group with continuous frequency domain resources, ensuring large intervals between frequency domain positions to reduce interference and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large-bandwidth positioning signals are used to obtain higher positioning accuracy, then positioning accuracy is improved, but frequency domain resource occupancy increases
Solution Approach 1:
The frequency domain bandwidth is divided into multiple subband groups, with each ranging signal occupying a different subband group. This segmentation allows the system to achieve large effective bandwidth for positioning accuracy while distributing frequency domain resource occupancy across multiple segments, resolving the contradiction between positioning accuracy and resource occupancy.
2Reliability
If ranging signals are transmitted in multiple times occupying different subband groups, then interference between ranging signals is reduced, but transmission time increases
Solution Approach 1:
The transmission process is segmented into multiple instances, with each ranging signal transmitted in a different time instance occupying different subband groups. This temporal segmentation reduces interference between ranging signals by separating them in both time and frequency domains, while the structured segmentation minimizes the total time loss.
Data Source
AI summary
A method for transmitting a sidelink ranging signal. performed by a transmitting terminal device, includes: transmitting k ranging signals to a receiving terminal device in k times, wherein the k ranging signals respectively occupy different subband groups, at least one subband group contains an integer number of subbands, at least one subband contains a continuous frequency domain resource, and k is a positive integer greater than or equal to 1.