Two-Satellite Terminal Positioning for Lower Delay and Location Verification
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Solution Overview
Problem
Existing satellite-based terminal device positioning methods in 5G systems suffer from large positioning delays and inaccurate location information due to the need for multiple measurements and potential interference, especially in satellite communication scenarios.
Innovation Solution
A positioning method that utilizes two communication apparatuses to perform measurements and report related information, reducing positioning delay by using reference signals to determine the location of a third communication apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-satellite-based terminal device positioning method is used, then positioning can be performed with simple system configuration, but positioning delay increases due to requiring at least three measurement times with large measurement gaps
Solution Approach 1:
The patent combines multiple satellites (first satellite and second satellite) to perform positioning measurements simultaneously, merging their positioning capabilities to reduce the number of measurement times required from three to two, thereby reducing positioning delay while maintaining system configuration simplicity
Solution Approach 2:
The patent introduces a multi-satellite spatial dimension for positioning measurements, transitioning from single-satellite sequential measurements to multi-satellite concurrent measurements, enabling parallel positioning operations that reduce time delay
2Loss of time
If terrestrial terminal device location information is used directly, then positioning can be performed quickly, but location accuracy deteriorates due to potential tampering or interference
Solution Approach 1:
The patent implements a feedback verification mechanism where multiple satellites perform independent positioning measurements and the network device compares these measurements with the terminal device's reported location information to verify accuracy, preventing tampering while maintaining positioning speed
Solution Approach 2:
The patent performs additional positioning measurements by multiple satellites beyond the single terminal-reported location, using these extra measurements to verify and cross-check the accuracy of location information without significantly increasing overall positioning time
Data Source
AI summary
This application provides a positioning method and an apparatus. The method includes: A first communication apparatus obtains first information, where the first information includes time difference information and location information for sending and receiving reference signals by the first communication apparatus; the first communication apparatus receives second information from a second communication apparatus and third information from a third communication apparatus, where the second information includes time difference information and location information for sending and receiving reference signals by the second communication apparatus, and the third information includes time difference information for sending and receiving reference signals by the third communication apparatus; and the first communication apparatus positions the third communication apparatus based on the first information, the second information, and the third information. A 3rd communication apparatus is positioned by combining two communication apparatuses.