Terminal-Specific Sidelink Positioning Reference Signals: Collision Avoidance
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Solution Overview
Problem
Existing sidelink positioning reference signal (S-PRS) transmission methods in 5G technology suffer from sequence collisions, leading to mutual interference between S-PRS signals and reduced terminal positioning accuracy.
Innovation Solution
Generate different sidelink positioning reference signals (S-PRS) by creating distinct first sequences for each terminal, thereby avoiding mutual interference and reducing collision probability in multi-terminal scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the same sequence is used for S-PRS transmission in multi-terminal scenarios, then the transmission process is simple, but sequence collisions occur leading to mutual interference and reduced positioning accuracy
Solution Approach 1:
The patent divides the single S-PRS sequence into multiple terminal-specific sequences, where each terminal is assigned a unique sequence identity. This segmentation eliminates sequence collisions between terminals while maintaining individual distinguishability, directly resolving the contradiction between positioning accuracy and sequence complexity.
Solution Approach 2:
The patent applies local quality by making each terminal's S-PRS sequence have unique local characteristics through different sequence identities. This allows each terminal to be identified and measured independently, improving positioning accuracy without requiring complex system-wide changes.
2Reliability
If different sequences are generated for each terminal to avoid collisions, then positioning accuracy improves, but the complexity of sequence management increases
Solution Approach 1:
The patent changes the sequence identity parameter for each terminal, allowing the same base sequence structure to generate multiple distinct sequences through parameter variation. This approach improves transmission reliability by avoiding collisions while keeping the underlying sequence structure simple and manageable.
Solution Approach 2:
The patent creates a universal sequence generation mechanism that can serve multiple terminals simultaneously. The same generation algorithm and structure are used across all terminals, with only the sequence identity parameter varying, thereby reducing overall system complexity while maintaining reliability.
3Measurement precision
If sequence length is increased to improve distinguishability, then collision resistance improves, but transmission time and resource occupation increase
Solution Approach 1:
The patent achieves sequence distinguishability through changing the sequence identity parameter rather than increasing sequence length. This allows multiple sequences to be clearly distinguishable within the same time frame, resolving the contradiction between distinguishability and transmission time.
Data Source
AI summary
A method for transmitting a sidelink positioning reference signal includes: generating a first sequence, and acquiring a sidelink positioning reference signal (S-PRS) according to the first sequence; and sending the S-PRS.