Satellite data distribution method and system using a mobile communication system
First Claim
1. A data distribution method for distributing data to a plurality of subscribers of a data distribution system via a satellite, said data distribution system including a mobile communication system having a base station unit communicating with said subscribers located within a communicable range according to a point-to-multipoint communication and a host center, said data distribution method comprising the steps of:
- transmitting a distribution request from a subscriber to said base station unit;
sending the distribution request from said base station unit to said host center via said mobile communication system;
transmitting data to be distributed from said host center to said satellite in response to said distribution request;
distributing said data from said satellite to said base station unit which received said distribution request;
receiving said data at said base station unit; and
distributing said data from said base station unit to said subscriber which transmitted said distribution request.
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Accused Products
Abstract
A satellite data distribution method and system in which a subscriber can receive a data distribution service via a mobile communication system. The satellite data distribution system includes a mobile communication system having at least one base station unit communicating with the subscribers. The data to be distributed is transmitted from a center station of the satellite data distribution system to a satellite. The data is distributed from the satellite to the base station unit of the mobile communication system. Then, the data is distributed from the base station unit to the subscribers via the mobile communication system. Thus, a satellite data reception unit is not necessarily provided to each of the subscribers.
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Citations
19 Claims
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1. A data distribution method for distributing data to a plurality of subscribers of a data distribution system via a satellite, said data distribution system including a mobile communication system having a base station unit communicating with said subscribers located within a communicable range according to a point-to-multipoint communication and a host center, said data distribution method comprising the steps of:
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transmitting a distribution request from a subscriber to said base station unit;
sending the distribution request from said base station unit to said host center via said mobile communication system;
transmitting data to be distributed from said host center to said satellite in response to said distribution request;
distributing said data from said satellite to said base station unit which received said distribution request;
receiving said data at said base station unit; and
distributing said data from said base station unit to said subscriber which transmitted said distribution request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
transmitting said data from said host center to said base station unit via said satellite in response to said distribution request from one of said subscribers.
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3. The data distribution method as claimed in claim 1, wherein the step of sending the distribution request comprises the step of:
sending a closing request to said mobile communication system for requesting closing of a communication channel used for distributing said data while said data is being distributed to said subscriber after said distribution request from said subscriber is confirmed in said base station unit.
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4. The data distribution method as claimed in claim 1, wherein the step of sending the distribution request comprises the step of:
setting a reception frequency in said base station unit for receiving said data from said satellite after confirming said distribution request from said subscriber during a communication between said subscriber and said host center.
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5. The data distribution method as claimed in claim 4, wherein the step of sending the distribution request further comprises the step of:
transferring information from said subscriber to said base station unit, the information including said reception frequency and a subscriber number of said subscriber.
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6. The data distribution method as claimed in claim 5, wherein the step of distributing said data from said base station unit to said subscriber, comprises the steps of:
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automatically making a call from said base station unit to said subscriber based on said information transferred in the transferring information step; and
automatically disconnecting a connection between said base station unit and said subscriber after said data is distributed from said base station unit to said subscriber.
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7. The distribution method as claimed in claim 1, further comprising the step of:
sending to said subscriber a message indicating that a distribution of said data is unable when said data is not received from said satellite within a predetermined time period after said distribution request is sent from said subscriber.
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8. The method as in claim 1, wherein said host center and said base station are interconnected through a ground network, and further comprising the step of:
sending the distribution request from said one of said subscribers to said host center through said ground network, said distribution request requesting distribution of said data.
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9. A base station unit of a mobile communication system used in a data distribution system for distributing data from a host center to a plurality of subscribers of the data distribution system via a satellite, said base station unit comprising:
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a communication processing unit for connecting said subscribers located within a communicable range to said mobile communication system according to a point-to-multipoint communication and for sending a distribution request received from a subscriber unit to said host center;
a satellite data reception unit for receiving said data sent by said satellite in response to said distribution request; and
a distribution processing unit for distributing said data received by said satellite data reception unit, said data being distributed to said subscribers via said communication processing unit.
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10. A base station unit of a mobile communication system used in a data distribution system for distributing data from a host center to a plurality of subscribers of the data distribution system via a satellite, said base station unit comprising:
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a communication processing unit for connecting said subscribers located within a communicable range to said mobile communication system according to a point-to-multipoint communication, and for sending a distribution request received from a subscriber unit to said host center; and
a distribution processing unit connectable to a satellite data reception unit for receiving said data sent by said satellite in response to said distribution request, said distribution processing unit distributing said data received by said satellite data reception unit, said data being distributed to said subscribers via said communication processing unit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification