Geostationary Satellite Correction Signal Distribution
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Solution Overview
Problem
Existing positioning systems face challenges in accurately measuring position using GPS satellites, particularly when augmentation signals from quasi-zenith satellites are obstructed, leading to communication bottlenecks and delays, and requiring new infrastructure for international mobile communication networks.
Innovation Solution
A positioning system utilizing a geostationary satellite to distribute correction signals simultaneously across multiple regions, covering the entire area with a grid division that fine-tunes regions affected by ionospheric delay, allowing for rapid and low-cost distribution of correction signals using existing facilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mobile communication network is utilized to distribute correction signals, then the correction signals can be distributed to users, but communication bottlenecks occur causing delays and increased communication volume
Solution Approach 1:
The patent introduces a broadcast satellite as an intermediary medium to distribute correction signals. Instead of using mobile communication networks directly, the system uses a broadcast satellite to transmit correction signals to on-board units, which then distribute them to users. This intermediary approach bypasses the communication bottlenecks of mobile networks and enables faster, more reliable signal distribution.
Solution Approach 2:
The patent segments the distribution area into multiple regions and divides correction signals into multiple types corresponding to different satellite systems (GPS, GLONASS, Galileo, BeiDou). Each region receives only the correction signals relevant to its location and the satellites visible from that area, reducing the communication volume and avoiding bottlenecks while maintaining distribution speed.
2Adaptability or versatility
If correction signals are distributed using mobile communication networks, then users can receive corrections, but new infrastructure must be built for international networks
Solution Approach 1:
The patent makes the broadcast satellite system universal by enabling it to distribute correction signals for multiple satellite systems (GPS, GLONASS, Galileo, BeiDou) simultaneously. The on-board units are designed to receive and process these multi-system correction signals, making the infrastructure adaptable to international and multi-regional operations without requiring separate infrastructure for each network.
Solution Approach 2:
The broadcast satellite serves as a neutral intermediary that can carry correction signals from different satellite systems without requiring direct integration with each network. This approach avoids the need to build and maintain complex international mobile communication infrastructure while achieving broad adaptability.
3Measurement precision
If the entire area is divided into fine grid regions, then positioning precision is improved, but the volume of data to be distributed increases
Solution Approach 1:
The patent applies local quality by dividing the distribution area into regions based on local characteristics such as ionospheric delay patterns and satellite visibility. Each region receives correction signals tailored to its specific needs rather than uniform fine-grained division everywhere. This maintains high positioning precision in areas requiring it while reducing data volume in areas where coarser division is sufficient.
Solution Approach 2:
The patent segments correction signals into multiple types corresponding to different satellite systems and segments the distribution area into multiple regions. Instead of distributing one massive fine-grained correction signal set to everyone, the system distributes segmented correction signal types to segmented regions, reducing overall data volume while maintaining precision through selective distribution.
Data Source
AI summary
A positioning system includes an on-board device that includes a positioning signal receiver that receives positioning signals from plural artificial satellites, a signal generator that generates a correction signal for correcting a positioning result based on the plural positioning signals, and a broadcast distribution unit that employs a geostationary satellite to distribute the correction signal together with another broadcast signal. The signal generator generates plural of the correction signals corresponding to plural distribution target regions set such that the entire area of a distribution target is covered. The broadcast distribution unit simultaneously distributes all the plural correction signals to each of the plural distribution target regions.