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US 7,398,092 B2Granted
Location tracing system for mobile telecommunication terminal and method thereof
AssigneeLG Electronics Inc.
InventorKwang-Jin An
Life of this patent
Estimating the term…
Abstract
A system and method for tracing a location of a mobile terminal involves having the mobile terminal transmit a predetermined signal including discrimination information with a predetermined interval. A plurality of base stations calculate distances from the mobile terminal based on a reception time for the predetermined signal transmitted from the terminal and then transmit the distance values to a cell controller. The cell controller traces a location of the mobile terminal using the distance values transmitted from the base stations. Accordingly, the system and method does not need a GPS receiver to calculate the terminal location, thereby reducing costs and location error range for the mobile telecommunication system.
Claims24
A location tracing system for mobile telecommunication terminals comprising:
- a mobile terminal for transmitting a predetermined signal with a predetermined interval;
- a plurality of base stations, each calculating a distance from the mobile terminal based on a reception time of the predetermined signal transmitted from the mobile terminal;
- and
- a cell controller which traces a location of the mobile terminal based on distance values transmitted from the plurality of base stations, the cell controller coupled to the base stations and located at a position different from the location of the mobile terminal, the cell controller tracing the location of the mobile terminal by:
- pre-storing coordinate values for each of a plurality of regions adjacent to or including the base stations, the coordinate values for each region indicating distances between the region and respective ones of the base stations;
- comparing the distance values transmitted from the base stations to each of the prestored coordinate values;
- and
- determining the location of the mobile terminal as corresponding to one of said plurality of regions based on the comparison.
5 more elements
A method for tracing a location of mobile telecommunication terminals comprising:
- dividing a region around base stations into a predetermined number of areas;
- calculating distances between a mobile terminal located in the divided areas and each base station, and setting/storing the distance values and location information by the distance values in a table of a cell controller in advance;
- receiving discrimination information transmitted from the mobile terminal and calculating distances between the mobile terminal and the respective base stations based on delayed time for receiving the discrimination information;
- transmitting the calculated distance values to the cell controller;
- and
- discriminating location information corresponding to the distance values between the mobile terminal and the respective base stations transmitted from the respective base stations through the table of the cell controller, said location information corresponding to a location of the mobile terminal.
3 more elements
A method for tracing a location of mobile telecommunication terminals comprising:
- when a mobile terminal is located at a portion other than a center portion of a predetermined region, dividing the predetermined region into detail areas, calculating distances values indicative of distances between the detail areas and each of a plurality of base stations, and setting/storing the distance values and location information according to the distance values in a table in advance;
- receiving discrimination information transmitted from the mobile terminal and calculating distances between the mobile terminal and the respective base stations based on delayed time for receiving the discrimination information;
- transmitting the calculated distance values to the cell controller;
- comparing the transmitted distance values with the distance values stored in the table,
- determining a distance value of the table that is substantially consistent with the transmitted distance values, and
- selecting location information from the table corresponding to the determined distance value, said selected location information corresponding to a location of the mobile terminal.
3 more elements
A method for tracing a location of mobile telecommunication terminals comprising:
- when a mobile terminal is located at portion other than a center portion of a predetermined region, dividing the predetermined region into several areas, calculating distance values between the several areas and the base stations, and setting/storing the distance values and location information according to the distance values in a table of a cell controller in advance,
- receiving discrimination information transmitted from the mobile terminal and calculating distances between the mobile telecommunication terminal and the respective base stations based on delayed time for receiving the discrimination information;
- transmitting the calculated distance values to the cell controller;
- comparing the distance values with the distance values stored in the table,
- determining a distance value of the table which is similar to the distance values, and
- selecting location information from the table corresponding to the determined distance value, said location information corresponding to a location of the mobile terminal.
3 more elements
A location tracing system for mobile telecommunication terminals comprising:
- a mobile terminal for transmitting a predetermined signal including discrimination information with a predetermined interval;
- a plurality of base stations, each calculating a distance from the mobile terminal based on a reception time of the predetermined signal transmitted from the mobile terminal;
- and
- a cell controller which traces a location of the mobile terminal based on distance values transmitted from the plurality of base stations, the cell controller coupled to the base stations and located at a position different from the location of the mobile terminal,
- wherein the cell controller sets and stores location information corresponding to the distance values in a table in advance and determines the location information through the table when the calculated values are transmitted from the plurality of base stations, thereby tracing a location of the mobile telecommunication terminal.
2 more elements
Dependencies are inferred from the claim text.