Method and system for geolocating a terminal of a wireless communication system
AssigneeSigfox
InventorLOÏC HUBERT
Life of this patent
Estimating the term…
Abstract
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.
Claims10
1-9. (canceled)
A method for geolocating a terminal of a wireless communication system, the wireless communication system comprising an access network configured to estimate an approximate geographical position of the terminal, the terminal comprising a positioning device to obtain a precise geographical position of the terminal, a precision obtained by the terminal being better than the precision of the approximate geographical position estimated by the access network, the method comprising:
- calculation by the terminal of truncated information on the precise geographical position by breaking down the precise geographical position into a first part and a second part, the first part varying less quickly than the second part when the terminal moves, the truncated information representing the second part of the precise geographical position;
- transmission by the terminal of the truncated information in a message to the access network;
- estimation of the approximate geographical position of the terminal by the access network;
- extraction by the access network of the truncated information from the message received from the terminal;
- and
- determination by the access network of the precise geographical position of the terminal from the truncated information and from the approximate geographical position.
A terminal of a wireless communication system comprising a positioning device configured to obtain a precise geographical position of the terminal, the terminal being configured to:
- calculate truncated information on the precise geographical position by breaking down the precise geographical position into a first part and a second part, the first part varying less quickly than the second part when the terminal moves, the truncated information representing the second part of the precise geographical position;
- and
- transmit the truncated information in a message to an access network of the wireless communication system.
Dependencies are inferred from the claim text.