RTK Meeting Recognition Using Terminal-to-Terminal Distance
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Solution Overview
Problem
Existing GNSS positioning methods suffer from poor accuracy and inefficiency in recognizing person-to-person meetings due to inherent errors in satellite signals, leading to delayed or failed follow-up tasks and increased costs for service providers.
Innovation Solution
Implementing a system that uses RTK technology to calculate precise distances between terminal devices, generating presumptive recognition of a meeting when criteria are met, and allowing users to challenge this recognition within a certain period, thereby reversing the role of the recognizer from a service user to a service provider.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard GNSS positioning methods are used, then the system is simple and easy to operate, but the positioning accuracy is poor due to inherent errors in satellite signals
Solution Approach 1:
The patent introduces a reference station as an intermediary element that collects satellite signal data and calculates correction values. These correction values are then transmitted to user terminals through a communication network, enabling high-precision positioning without requiring complex equipment at the user end. The reference station acts as a mediator that transforms the simple GNSS reception into precise positioning capability.
Solution Approach 2:
The patent changes the parameter of positioning precision by introducing RTK (Real-Time Kinematic) correction technology. By using carrier-phase differential positioning and calculating integer ambiguities, the system achieves centimeter-level accuracy instead of the standard meter-level GNSS accuracy. This parameter change is achieved through mathematical processing of satellite signals rather than hardware modification.
2Productivity
If service users manually recognize meetings, then the system is simple to implement, but follow-up tasks are delayed or failed due to noncooperation and evaluation delays
Solution Approach 1:
The system enables automatic meeting recognition by having terminal devices self-report their position data to the server. The server automatically processes this data to determine whether meetings occurred, eliminating the need for manual user evaluation. This self-service mechanism ensures both high productivity and reliability, as the automatic recognition cannot be delayed by user noncooperation.
Solution Approach 2:
The patent implements a feedback mechanism where the server sends meeting recognition results back to users, and users can provide correction feedback if the automatic recognition is wrong. This feedback loop improves the reliability of the system by allowing human intervention when needed, while maintaining high productivity through automatic processing of routine cases.
3Measurement precision
If RTK technology is implemented for precise positioning, then meeting recognition accuracy is enhanced, but the device complexity and computational requirements increase
Solution Approach 1:
The patent segments the complex RTK processing into two parts: the reference station performs the computationally intensive tasks of collecting satellite data, calculating correction values, and determining integer ambiguities; the user terminals only need to receive and apply these corrections to their position calculations. This segmentation reduces the processing complexity at the user end while maintaining high measurement precision.
Data Source
AI summary
A precise positioning-based method for presumptively determining if two people are actually meeting includes two applications of terminal devices capable of receiving navigation satellite (GNSS) signal and an application server, wherein one of the applications or the application server has an ability to performing RTK algorithm to calculate a terminal-to-terminal distance between the two terminal devices using satellite observation data. The application server generates a presumptive recognition that terminal device holders have met if pattern of the terminal-to-terminal distance meets a preset criterion. Terminal device holders can raise objections through terminal device applications to rebut the presumptive recognition only if there is something wrong, which thereby expedites related work without waiting for the cooperation of terminal device holders.