Group RTK Positioning Using a Temporary Base Terminal
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Solution Overview
Problem
Existing GNSS positioning methods face accuracy issues due to inherent errors, and existing RTK systems require constant access to permanent reference stations or local base station equipment, limiting their applicability in industries related to the 4th Industrial Revolution.
Innovation Solution
An application server combines multiple user terminal devices into a group, selects a temporary base terminal device at a known location, performs a relative positioning RTK algorithm, and calculates absolute positions for all devices, eliminating the need for permanent reference stations or local base station equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTK positioning uses a dedicated local base station or CORS with known precise position, then positioning precision is improved, but device complexity and operational constraints increase
Solution Approach 1:
The patent enables user terminal devices to autonomously perform RTK positioning calculations using satellite observation data received from multiple devices. Each device acts as both a user terminal and a potential base station, eliminating the need for dedicated base station infrastructure. The system self-organizes by selecting one device as the base terminal device, allowing groups to independently conduct precise positioning without external reference station support.
Solution Approach 2:
User terminal devices are designed to perform multiple functions: they can operate as both user terminals receiving positioning services and as base terminal devices providing correction data. This multi-functionality allows any device in the group to serve as the reference point, eliminating the need for specialized base station equipment and enabling flexible, infrastructure-free RTK positioning.
2Measurement precision
If RTK system requires constant access to permanent reference station server or local base station equipment, then positioning accuracy is maintained, but adaptability and ease of operation deteriorate
Solution Approach 1:
The patent segments the RTK positioning function into distributed components across multiple user terminal devices. Instead of relying on a centralized reference station server, each device independently receives satellite observation data and contributes to the collective positioning calculation. This segmentation enables the system to operate without permanent infrastructure and adapt to various application scenarios including mobile events, temporary construction sites, and remote locations.
Solution Approach 2:
The system dynamically selects a base terminal device from the group based on real-time conditions such as signal quality and device capabilities. The base terminal device is not fixed but can change among group members, allowing the system to adapt to changing environmental conditions and maintain positioning accuracy without permanent reference stations.
3Adaptability or versatility
If multiple user terminal devices form a group and select a temporary base terminal device, then infrastructure requirements are reduced, but calculation complexity increases
Solution Approach 1:
The patent introduces an application server as an intermediary that facilitates group formation, base terminal device selection, and coordinate transformation. The server receives satellite observation data from multiple devices, performs the complex RTK calculations, and transforms coordinates between different reference frames. This intermediary approach distributes computational complexity from individual devices to the server, maintaining simplicity at the device level while enabling infrastructure-independent operation.
Data Source
AI summary
A method for calculating the precise positions of multiple terminal devices without the cost for permanent reference stations or local base station equipment includes combining the multiple terminal devices into a group, selecting the most appropriate terminal device from the group as a temporary base terminal device, checking if the temporary base terminal device is placed at a specific point whose position is known or easily knowable on a map, repeatedly performing relative RTK precise positioning algorithms to calculate relative positions between the temporary base terminal device and the other terminal devices, and finally adding the position of the specific place to the calculated relative positions to obtain precise position of all user terminal devices in the group.