Mobile Terminal Positioning Using Cell Area Virtual Centers
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Solution Overview
Problem
Conventional methods for localizing cellular telephones without a built-in GPS receiver or in areas with no GPS coverage provide limited accuracy, which is disadvantageous in emergency situations where timely rescue is critical.
Innovation Solution
A device and method that determine the position of a mobile radio terminal by using cell area positions instead of base station transceiver positions, considering the geometric coverage area and antenna characteristics to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position of a mobile phone is determined using the position of the base station transceiver, then the method is simple to implement, but the position determination accuracy is limited
Solution Approach 1:
The patent segments the cell area into multiple virtual centers based on antenna sectors. Instead of using a single base station position, it divides the coverage area into multiple sectors each with its own virtual center, thereby improving position determination accuracy without significantly increasing complexity
Solution Approach 2:
The patent applies different virtual center positions for different antenna sectors. Each sector has its own virtual center based on its specific antenna orientation and coverage characteristics, allowing for more accurate local position determination while maintaining overall system simplicity
2Measurement precision
If conventional localization methods are used, then the system is easy to operate, but the accuracy is insufficient for emergency situations
Solution Approach 1:
The patent pre-calculates and stores virtual center positions for all antenna sectors in advance. During emergency situations, these pre-computed virtual centers can be immediately used for position determination, reducing response time while maintaining high accuracy
3Measurement precision
If only base station transceiver position is used, then the device complexity is low, but the measurement precision is insufficient
Solution Approach 1:
The patent transitions from using only base station transceiver positions (one dimension) to incorporating multiple virtual center positions from different antenna sectors (multiple dimensions). This dimensional expansion enables more accurate position determination by considering the spatial distribution of virtual centers across the cell area
Data Source
AI summary
The device (100) has a unit (110) for supplying of receiving level measurement of multiple base station transceivers. The base station transceiver has a base station transceiver position and a cell area provided with a cell area position with radio signals. The cell area position differs from the basis station transceiver position and lies in the cell area. Another unit (120) is provided for determining the position of the mobile station based on a combination of the cell area positions of the base station transceivers. Independent claims are included for the following: (1) a method for position determination of mobile station (2) a computer program with a program code for the execution of the method.