Mobile communication system with satellite communication hand off capability
First Claim
1. A mobile communication system, comprising:
- a public communication network, a terrestrial private communication system connected to said public communication network, and a satellite communication system connected to said public communication network;
said terrestrial private communication system having a specific communication zone in which said private communication system is capable of providing communication services and including at least one terrestrial radio base station, at least one mobile communication device for communicating with said radio base station within said communication zone and for communicating with said satellite system, and private branch exchange means for performing communication processing between said private communication system and said public communication network such that said mobile communication device is capable of engaging in communication with subscribers of said public communication network through said private branch exchange means;
said satellite communication system including at least one orbiting satellite station for relaying radio waves through a satellite communication path, and at least one terrestrial satellite ground station for performing communication processing between said satellite communication system and said public communication network;
said mobile communication system functioning such that when said at least one mobile communication device moves outside of said communication zone and into an area which is not served by any terrestrial private communication system while engaged in communication with a subscriber of said public communication network through said private communication system, said private branch exchange means transfers information relating to said at least one mobile communication device to said terrestrial satellite ground station through said public communication network to cause said communication between said at least one mobile communication device and said subscriber to be handed off to said satellite communication system such that said communication thereafter passes through said satellite communication system instead of said private communication system.
1 Assignment
0 Petitions
Accused Products
Abstract
The mobile communication system comprising a public network, a private system connected to the public network and a satellite system connected to the public network. The private system includes a radio base station which has a communication zone, a first mobile telephone which is able to communicate with the radio base station in the communication zone and is able to communicate with the satellite system, and a private branch exchange connected to both the public network and the radio base station which performs communication processes between the public network and the private system. The radio base station and the first mobile telephone are able to process a private protocol and a public protocol. The satellite system includes a satellite station which relays radio waves on a satellite line, and a satellite ground station which is able to communicate with the satellite station and is connected to the public network. When the first mobile telephone roams to the satellite system, the private branch exchange transfers information of the first mobile telephone for roaming to the satellite ground station via the public network before changing communication lines.
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Citations
7 Claims
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1. A mobile communication system, comprising:
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a public communication network, a terrestrial private communication system connected to said public communication network, and a satellite communication system connected to said public communication network; said terrestrial private communication system having a specific communication zone in which said private communication system is capable of providing communication services and including at least one terrestrial radio base station, at least one mobile communication device for communicating with said radio base station within said communication zone and for communicating with said satellite system, and private branch exchange means for performing communication processing between said private communication system and said public communication network such that said mobile communication device is capable of engaging in communication with subscribers of said public communication network through said private branch exchange means; said satellite communication system including at least one orbiting satellite station for relaying radio waves through a satellite communication path, and at least one terrestrial satellite ground station for performing communication processing between said satellite communication system and said public communication network; said mobile communication system functioning such that when said at least one mobile communication device moves outside of said communication zone and into an area which is not served by any terrestrial private communication system while engaged in communication with a subscriber of said public communication network through said private communication system, said private branch exchange means transfers information relating to said at least one mobile communication device to said terrestrial satellite ground station through said public communication network to cause said communication between said at least one mobile communication device and said subscriber to be handed off to said satellite communication system such that said communication thereafter passes through said satellite communication system instead of said private communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification