DAS-Based Positioning with Multi-Antenna Time Differences
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing vehicle-to-everything (V2X) communication, particularly in enhancing mobile broadband communication, massive Machine Type Communication (MTC), Ultra-Reliable and Low Latency Communication (URLLC), and V2X scenarios such as vehicle platooning, advanced driving, and remote driving, due to limitations in positioning accuracy and resource allocation.
Innovation Solution
A method involving a first device receiving a positioning reference signal (PRS) using multiple antennas and calculating time differences to determine its position, enabling precise SL communication and resource allocation for improved V2X scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antennas are used for receiving positioning reference signals, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The device divides the positioning measurement task across multiple antennas (first antenna, second antenna, third antenna), where each antenna independently receives the positioning reference signal and measures time difference values. This segmentation allows the system to achieve higher positioning accuracy through multiple measurement points while managing complexity by processing each antenna's data separately through standardized procedures.
2Measurement precision
If time difference calculations are performed using multiple antennas, then positioning precision is improved, but calculation complexity increases
Solution Approach 1:
The patent merges the measurement results from multiple antennas by calculating average values of corresponding time difference values. Specifically, the first time difference value from the first antenna and the second time difference value from the second antenna are averaged to obtain a first average time difference value, which reduces calculation complexity while maintaining improved positioning precision through the combined information from multiple antennas.
3Measurement precision
If multiple time difference values are calculated and averaged, then positioning accuracy is enhanced, but processing time increases
Solution Approach 1:
The system performs a limited number of averaging operations rather than exhaustive processing. It calculates only the necessary average values (first average time difference value from first and second antennas, second average time difference value from second and third antennas) required for positioning accuracy, avoiding excessive processing while still achieving enhanced precision through selective averaging.
Data Source
AI summary
Proposed is an operation method for a first device (100) in a wireless communication system. The method may comprise the steps of: receiving a first positioning reference signal (PRS) from a second device (200), on the basis of a first antenna (106-1), a second antenna (106-2), and a third antenna (106-3); obtaining a first time difference, on the basis of a first reception time at which the first PRS is received on the basis of the first antenna (106-2) and a second reception time at which the first PRS is received on the basis of the second antenna (106-2); obtaining a second time difference, on the basis of a third reception time at which the first RPS is received on the basis of the third antenna (106-3) and the first reception time; and obtaining the location of the first device (100), on the basis of the first time difference and the second time difference.