Automatic satellite/terrestrial mobile terminal roaming system and method
First Claim
1. A communications system, comprising:
- at least one user terminal;
a satellite communications component comprising at least one satellite and at least one terrestrial gateway;
a wireless terrestrial communications component comprising at least one repeater and at least one mobile switching center;
said at least one gateway and said at least one mobile switching center being coupled together by a first mobile applications part network, said at least one gateway and said at least one mobile switching center further being coupled to a terrestrial communications network; and
said at least one user terminal comprising a first transceiver for bidirectionally communicating with said gateway through said satellite, a second transceiver for bidirectionally communicating with said mobile switching center through said repeater, and control means, responsive to a gateway selected system selection protocol, for enabling either said first transceiver or said second transceiver for conveying a user communication to said terrestrial communications network;
whereinsaid communications system is further comprised of a data base storing data representing a map that indicates poor quality communications areas within a gateway service area, and wherein said gateway selected system selection protocol is modified as a function of said data from said data base;
wherein said gateway is bidirectionally coupled to said mobile applications part network through one of a home location register or a visitor location register; and
wherein said gateway is bidirectionally coupled to a second mobile applications part network through one of a home location register or a visitor location register.
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Accused Products
Abstract
A communications system includes a satellite communications component having at least one satellite and at least one terrestrial gateway, and also a wireless terrestrial communications component having at least one repeater and at least one mobile switching center. The at least one gateway and the at least one mobile switching center are coupled together by a first mobile applications part (MAP) network, such as an IS-41 or GSM MAP network. The at least one gateway and the at least one mobile switching center are further coupled to a terrestrial communications network (PSTN). The system further includes at least one dual mode or higher user terminal having a first transceiver for bidirectionally communicating with the gateway through the satellite, a second transceiver for bidirectionally communicating with the mobile switching center through the repeater, and a controller, responsive to one of a user selected or a gateway selected protocol, for selectively enabling either the first or the second transceiver for conveying a user communication to the terrestrial communications network.
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Citations
14 Claims
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1. A communications system, comprising:
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at least one user terminal; a satellite communications component comprising at least one satellite and at least one terrestrial gateway; a wireless terrestrial communications component comprising at least one repeater and at least one mobile switching center; said at least one gateway and said at least one mobile switching center being coupled together by a first mobile applications part network, said at least one gateway and said at least one mobile switching center further being coupled to a terrestrial communications network; and said at least one user terminal comprising a first transceiver for bidirectionally communicating with said gateway through said satellite, a second transceiver for bidirectionally communicating with said mobile switching center through said repeater, and control means, responsive to a gateway selected system selection protocol, for enabling either said first transceiver or said second transceiver for conveying a user communication to said terrestrial communications network;
whereinsaid communications system is further comprised of a data base storing data representing a map that indicates poor quality communications areas within a gateway service area, and wherein said gateway selected system selection protocol is modified as a function of said data from said data base; wherein said gateway is bidirectionally coupled to said mobile applications part network through one of a home location register or a visitor location register; and wherein said gateway is bidirectionally coupled to a second mobile applications part network through one of a home location register or a visitor location register. - View Dependent Claims (2, 3, 4, 6)
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5. A communications system, comprising:
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at least one user terminal; a satellite communications component comprising at least one satellite and at least one terrestrial gateway; a wireless terrestrial communications component comprising at least one repeater and at least one mobile switching center; said at least one gateway and said at least one mobile switching center being coupled together by a first mobile applications part network, said at least one gateway and said at least one mobile switching center further being coupled to a terrestrial communications network; and said at least one user terminal comprising a first transceiver for bidirectionally communicating with said gateway through said satellite, a second transceiver for bidirectionally communicating with said mobile switching center through said repeater, and control means, responsive to a gateway selected system selection protocol, for enabling either said first transceiver or said second transceiver for conveying a user communication to said terrestrial communications network;
whereinsaid communications system is further comprised of a data base storing data representing a map that indicates poor quality communications areas within a gateway service area, and wherein said gateway selected system selection protocol is modified as a function of said data from said data base, wherein said gateway is comprised of first interface means for coupling said gateway to said first mobile applications part network and a second interface means for coupling said gateway to a second mobile applications parts network, and wherein said second interface means also couples said gateway to said terrestrial communications network.
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7. A method for operating a communications system, comprising steps of:
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providing at least one user terminal, providing a satellite communications component that comprises at least one satellite and at least one terrestrial gateway, and providing a wireless terrestrial communications component that comprises at least one repeater and at least one mobile switching center, the at least one user terminal being provided so as to comprise a first transceiver for bidirectionally communicating with the terrestrial gateway through the at least one satellite and a second transceiver for bidirectionally communicating with the at least one mobile switching center through the at least one repeater; coupling together the at least one gateway and the at least one mobile switching center with a first mobile applications part network; further coupling the at least one gateway and the at least one mobile switching center to a terrestrial communications network; and operating a controller of the at least one user terminal to be responsive to a gateway selected system selection protocol for enabling either the first transceiver or the second transceiver for conveying a user communication to the terrestrial communications network;
the method further comprising steps of,storing data in a data base accessible by the at least one gateway, the stored data representing a map indicating poor quality communications areas within a gateway service area; and modifying the gateway selected system selection protocol as a function of data stored in the data base. - View Dependent Claims (8, 9, 11, 13)
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10. A method for operating a communications system, comprising steps of:
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providing at least one user terminal, providing a satellite communications component that comprises at least one satellite and at least one terrestrial gateway, and providing a wireless terrestrial communications component that comprises at least one repeater and at least one mobile switching center, the at least one user terminal being provided so as to comprise a first transceiver for bidirectionally communicating with the terrestrial gateway through the at least one satellite and a second transceiver for bidirectionally communicating with the at least one mobile switching center through the at least one repeater; coupling together the at least one gateway and the at least one mobile switching center with a first mobile applications part network; further coupling the at least one gateway and the at least one mobile switching center to a terrestrial communications network; and operating a controller of the at least one user terminal to be responsive to one a gateway selected system selection protocol for enabling either the first transceiver or the second transceiver for conveying a user communication to the terrestrial communications network, and further comprising steps of; storing data in a data base accessible by the at least one gateway, the stored data representing a historical record of user terminal availability within a gateway service area; and modifying the gateway selected system selection protocol as a function of data stored in the data base. - View Dependent Claims (12, 14)
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Specification