Zone-Based Anchor Selection for Faster Mobile Positioning
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Solution Overview
Problem
Conventional positioning systems face delays and resource consumption due to the need to connect to multiple base stations for accurate positioning, especially in environments where satellite signals are unavailable, and there is a shortage of frequency resources for radio signal utilization.
Innovation Solution
A positioning system that utilizes a database to store information on geographical zones, anchors, and communication parameters, allowing mobile stations to determine their zone and select appropriate anchors for communication, thereby calculating their position efficiently with reduced resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positioning methods connect to multiple base stations to achieve accurate positioning, then positioning accuracy is improved, but positioning processing delay increases and radio resource consumption increases
Solution Approach 1:
The system pre-calculates and stores candidate base station groups in a database before positioning is needed. When positioning is required, the mobile device simply retrieves the pre-prepared candidate groups based on its approximate location, eliminating the time-consuming process of searching and narrowing down base stations in real-time.
Solution Approach 2:
The invention extracts only the necessary candidate base station groups from the entire network based on the mobile device's approximate position and service area information. This extraction process pre-identifies the subset of base stations that will be relevant for positioning, reducing the number of connections needed while maintaining accuracy.
2Measurement precision
If conventional positioning methods connect to multiple base stations to achieve accurate positioning, then positioning accuracy is improved, but radio resource consumption increases
Solution Approach 1:
The system extracts and identifies only the necessary candidate base station groups based on approximate position and service area data. By pre-determining which base stations are relevant, the system minimizes the number of actual positioning connections required, thereby reducing radio resource consumption while maintaining positioning accuracy.
Solution Approach 2:
Base station group information is prepared in advance and stored in a database. This preliminary preparation eliminates the need for real-time searching and narrowing down of base stations, reducing both processing delay and radio resource usage during actual positioning operations.
3Measurement precision
If conventional positioning methods search and narrow down candidate base stations in real-time, then positioning accuracy can be achieved, but positioning processing delay increases
Solution Approach 1:
The system performs the computationally intensive task of identifying and evaluating candidate base station groups in advance, storing the results in a database. During actual positioning, the mobile device simply retrieves pre-processed candidate groups based on its approximate location, dramatically speeding up the positioning process while maintaining accuracy.
Data Source
AI summary
A positioning system includes: an approximate position calculation unit that calculates an approximate position of a mobile station; a database that stores information indicating a zone in which the mobile station is able to be present, information indicating an anchor to be used in each zone, and information on a communication parameter; a zone judgement unit that judges a zone to which the mobile station belongs based on the approximate position and information in the database; an anchor-to-be-used determination unit that determines an anchor to be used by the mobile station based on the zone and information in the database; a positioning information acquisition unit that acquires positioning information indicating a positional relationship between the determined anchor and the mobile station; and a position calculation unit that calculates a position of the mobile station based on the positioning information and information in the database.