System and method for dual-mode location determination
First Claim
Patent Images
1. A method, comprising:
- measuring, by a mobile terminal, a plurality of observation measurements from a respective plurality of GPS signals received by said mobile terminal;
receiving, by said mobile terminal from a cellular tower in a terrestrial cellular mobile telephone network, information that is indicative of a location area; and
when the mobile terminal is in view of said cellular tower in said terrestrial cellular mobile telephone network, then transmitting, by said mobile terminal, wireless signals for receipt by said cellular tower in said terrestrial cellular mobile telephone network, said wireless signals including said plurality of observation measurements, along with said location area information, wherein said plurality of observation measurements and said location area information are subsequently delivered to a service operations center for determination of a location of the mobile terminal.
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Abstract
A geographic tracking system with minimal power and size required at the mobile terminal collects observation data at the mobile terminal, forwards the data to a processor, which calculates the position. The mobile terminal needs only to gather a few milliseconds of observation data, and to relay this observation data to the processor. In one embodiment, the observation data is communicated to the processor using either a satellite communication network or through a mobile telephone network.
201 Citations
17 Claims
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1. A method, comprising:
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measuring, by a mobile terminal, a plurality of observation measurements from a respective plurality of GPS signals received by said mobile terminal; receiving, by said mobile terminal from a cellular tower in a terrestrial cellular mobile telephone network, information that is indicative of a location area; and when the mobile terminal is in view of said cellular tower in said terrestrial cellular mobile telephone network, then transmitting, by said mobile terminal, wireless signals for receipt by said cellular tower in said terrestrial cellular mobile telephone network, said wireless signals including said plurality of observation measurements, along with said location area information, wherein said plurality of observation measurements and said location area information are subsequently delivered to a service operations center for determination of a location of the mobile terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising
receiving, by a mobile terminal from a cellular tower in a terrestrial cellular mobile telephone network, information that is indicative of a location area; - and
transmitting, by said mobile terminal, wireless signals to said cellular tower in said terrestrial cellular mobile telephone network, said wireless signals including a plurality of observation measurements that are taken, by said mobile terminal, from a respective plurality of GPS signals received by said mobile terminal, along with said information that is indicative of a location area, wherein said plurality of observation measurements and said information indicative of a location area are provided to a service operations center for determination of a location of the mobile terminal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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measuring, by a mobile terminal, a plurality of observation measurements from a respective plurality of GPS signals received by said mobile terminal, wherein said mobile terminal is configured to operate in a dual-mode capacity with a service operations center through either a satellite communication network or a terrestrial cellular mobile telephone network; receiving, by said mobile terminal from a cellular tower in said terrestrial cellular mobile telephone network, information that is indicative of a location area; and when the mobile terminal is in view of said cellular tower in said terrestrial cellular mobile telephone network, then transmitting, by said mobile terminal, wireless signals for receipt by said cellular tower in said terrestrial cellular mobile telephone network, said wireless signals including said plurality of observation measurements, along with said location area information, wherein said plurality of observation measurements and said location area information are subsequently delivered to said service operations center for determination of a location of the mobile terminal.
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Specification