Satellite communication system
First Claim
Patent Images
1. A satellite communication system comprising:
- a feeder link station that issues a relay control by performing an up-link frequency allocation and a down-link frequency allocation in response to a transmission request received from a transmission source terminal in any one of a plurality of service areas; and
a satellite repeater that compresses a down-link frequency bandwidth allocated to each of the service areas and relays a communication between the service areas following receipt of the relay control by the feeder link station, the satellite repeater being separate from the feeder link station and communicating with the feeder link station via a feeder link,wherein when the satellite repeater receives from the transmission source terminal a transmission request for new data that specifies a requested bandwidth to be used under a situation where a plurality of data are transmitted to a specific service area from the plurality of service areas, the satellite repeater converts a format of the transmission request and transmits the converted transmission request to the feeder link station via the feeder link, and when the feeder link station receives the converted transmission request, the feeder link station initially determines whether an up-link frequency band from the transmission source terminal to the satellite repeater corresponding to the requested bandwidth is available, when it is determined that the up-link frequency band is available, the feeder link station then determines whether a down-link frequency band included in a down-link frequency bandwidth of the specific service area corresponding to the requested bandwidth is available to be allocated to the new data, and when the down-link frequency band included in the down-link frequency bandwidth of the specific service area is determined to be available, the feeder link station allocates a down-link frequency band used in any of data communication to the specific service area as the down-link frequency band for the new data and transmits the relay control to the satellite repeater via the feeder link, andthe satellite repeater receives the relay control from the feeder link station via the feeder link, converts a format of the relay control, and arranges the new data on the down-link frequency band right after the data communication is completed, according to the relay control received from the feeder link station.
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Accused Products
Abstract
When a transmission request for new data is issued under a situation where a plurality of data are transmitted to a specific service area from a plurality of service areas, a feeder link station searches an available frequency to be allocated to the new data in a down-link frequency band of the specific service area, and when any of data communications is completed, allocates a down-link frequency band used in the data communication as a down-link frequency band for the new data. A satellite repeater arranges the new data on the down-link frequency band right after the data communication is completed following a relay control by the feeder link station.
34 Citations
10 Claims
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1. A satellite communication system comprising:
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a feeder link station that issues a relay control by performing an up-link frequency allocation and a down-link frequency allocation in response to a transmission request received from a transmission source terminal in any one of a plurality of service areas; and a satellite repeater that compresses a down-link frequency bandwidth allocated to each of the service areas and relays a communication between the service areas following receipt of the relay control by the feeder link station, the satellite repeater being separate from the feeder link station and communicating with the feeder link station via a feeder link, wherein when the satellite repeater receives from the transmission source terminal a transmission request for new data that specifies a requested bandwidth to be used under a situation where a plurality of data are transmitted to a specific service area from the plurality of service areas, the satellite repeater converts a format of the transmission request and transmits the converted transmission request to the feeder link station via the feeder link, and when the feeder link station receives the converted transmission request, the feeder link station initially determines whether an up-link frequency band from the transmission source terminal to the satellite repeater corresponding to the requested bandwidth is available, when it is determined that the up-link frequency band is available, the feeder link station then determines whether a down-link frequency band included in a down-link frequency bandwidth of the specific service area corresponding to the requested bandwidth is available to be allocated to the new data, and when the down-link frequency band included in the down-link frequency bandwidth of the specific service area is determined to be available, the feeder link station allocates a down-link frequency band used in any of data communication to the specific service area as the down-link frequency band for the new data and transmits the relay control to the satellite repeater via the feeder link, and the satellite repeater receives the relay control from the feeder link station via the feeder link, converts a format of the relay control, and arranges the new data on the down-link frequency band right after the data communication is completed, according to the relay control received from the feeder link station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A satellite communication method, implemented on a satellite communication system that includes a feeder link station and a satellite repeater, comprising:
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issuing a relay control, at the feeder link station, by performing an up-link frequency allocation and a down-link frequency allocation in response to a transmission request received from a transmission source terminal in any one of a plurality of service areas; and compressing, at the satellite repeater, a down-link frequency bandwidth allocated to each of the service areas and relaying a communication between the service areas following the relay control, the satellite repeater being separate from the feeder link station and communicating with the feeder link station via a feeder link, wherein when the satellite repeater receives from the transmission source terminal a transmission request for new data that specifies a requested bandwidth to be used under a situation where a plurality of data are transmitted to a specific service area from the plurality of service areas, the satellite repeater converts a format of the transmission request and transmits the converted transmission request to the feeder link station via the feeder link, and when the feeder link station receives the converted transmission request, the feeder link station initially determines whether an up-link frequency band from the transmission source terminal to the satellite repeater corresponding to the requested bandwidth is available, when it is determined that the up-link frequency band is available, the feeder link station then determines whether a down-link frequency band included in a down-link frequency bandwidth of the specific service area corresponding to the requested bandwidth is available to be allocated to the new data, and when the down-link frequency band included in the down-link frequency bandwidth of the specific service area is determined to be available, the feeder link station allocates a down-link frequency band used in any of data communication to the specific service area as the down-link frequency band for the new data and transmits the relay control to the satellite repeater via the feeder link; and receiving, at the satellite repeater, the relay control from the feeder link station via the feeder link; converting, at the satellite repeater, a format of the relay control; and arranging, at the satellite repeater, the new data on the down-link frequency band right after the data communication is completed, according to the relay control received from the feeder link station.
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Specification