Geolocation Precision via Truncated Position Data Exchange
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Solution Overview
Problem
Existing methods for geolocating terminals in wireless communication systems, especially in low-bit-rate IoT applications, face challenges in precision and efficiency due to high data size requirements and imprecise location estimation by the access network.
Innovation Solution
A method that breaks down the precise geographical position into a first and second part, with the second part being transmitted as truncated information, allowing the access network to determine the precise position by combining it with an approximate position estimated using existing methods, thereby reducing data exchange while maintaining precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal transmits the complete precise geographical position to the access network, then the geolocation precision is improved, but the data size increases and electrical consumption increases
Solution Approach 1:
The patent divides the precise geographical position into two parts: a first part that varies slowly when the terminal moves, and a second part that varies quickly. Only the second part (truncated information) is transmitted to the access network, while the first part is derived from the approximate position. This segmentation allows maintaining geolocation precision while significantly reducing the data size transmitted over the network.
2Measurement precision
If the terminal transmits the complete precise geographical position to the access network, then the geolocation precision is improved, but the duration of occupation of the frequency band increases
Solution Approach 1:
By segmenting the geographical position data and transmitting only the variable second part (truncated information), the message duration is reduced. This decreases the time the frequency band is occupied, allowing faster communication cycles and preserving radio resources.
3Quantity of substance
If the access network uses multilateration methods or received power level methods to estimate the terminal's position, then the data size is reduced, but the geolocation precision deteriorates
Solution Approach 1:
The patent segments the position data such that the access network receives only the truncated second part, which when combined with the approximate position derived from network-based methods, achieves precision comparable to terminal-based positioning while using minimal data.
Solution Approach 2:
The patent merges the truncated information from the terminal with the approximate geographical position estimated by the access network through a combination operation. This merging process reconstructs the precise geographical position, achieving high precision without requiring the terminal to transmit the complete position data.
4Measurement precision
If the terminal uses a positioning device to obtain precise geographical position, then the geolocation precision is improved, but the electrical consumption increases
Solution Approach 1:
The patent segments the position data transmission, requiring the terminal to transmit only the truncated second part rather than the complete precise position. This reduces the data transmission time and energy consumption while maintaining the benefit of precise positioning through the combination with network-estimated approximate position.
Data Source
AI summary
A method for geolocating a terminal of a wireless communication system. The terminal includes a positioning device for obtaining a precise geographical position of the terminal. An access network of the communication system estimates an approximate geographical position of the terminal. In order to limit the size of the messages exchanged between the terminal and the access network, only a truncated part of the information about the precise geographical position of the terminal is transmitted by the terminal to the access network. The access network determines the precise geographical position of the terminal by combining the truncated information received from the terminal with the approximate geographical position estimated by the access network.