Broadcasting satellite communication system with improved answer signal transmission
First Claim
1. A satellite communication system for directly broadcasting an information signal from a transmitting station to a plurality of receiving stations located in a predetermined geographical area, said information signal being broadcast via a communication satellite, comprising:
- an answering station, being distinct from said receiving stations, that transmits a first answer signal, representing status data from said receiving stations located in the predetermined geographical area, to the transmitting station via the communication satellite; and
,a data link for connecting said answering station and said receiving stations located in the predetermined geographical area,said answering station including means for collecting, from each of said receiving stations in the predetermined geographical area via the data link, status data indicating whether each of the receiving stations correctly received the information signal, and means for generating and transmitting the first answer signal, which includes a request for retransmission, to the transmitting station via the communication satellite.
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Abstract
A satellite communication system broadcasts an information signal from a transmitting station to a plurality of receiving stations via a communication satellite. An answer station is provided among a plurality of receiving stations which are located in a predetermined geographical area. The answer station and the plurality of receiving stations in the designated group are connected by a ground data link. The answer station collects status data of each of the receiving stations to transmit an answer signal to the transmitting station on behalf of the group of receiving stations, so that a transmitting function for each of the receiving stations can be eliminated. The answer station can also act as one of the receiving stations in the designated group.
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Citations
12 Claims
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1. A satellite communication system for directly broadcasting an information signal from a transmitting station to a plurality of receiving stations located in a predetermined geographical area, said information signal being broadcast via a communication satellite, comprising:
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an answering station, being distinct from said receiving stations, that transmits a first answer signal, representing status data from said receiving stations located in the predetermined geographical area, to the transmitting station via the communication satellite; and
,a data link for connecting said answering station and said receiving stations located in the predetermined geographical area, said answering station including means for collecting, from each of said receiving stations in the predetermined geographical area via the data link, status data indicating whether each of the receiving stations correctly received the information signal, and means for generating and transmitting the first answer signal, which includes a request for retransmission, to the transmitting station via the communication satellite. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A broadcasting satellite communication system, comprising:
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(a) a transmitting station for transmitting an information signal; (b) a communication satellite for broadcasting the information signal; (c) a plurality of terrestrial stations, communicating with the transmitting station via the communication satellite, for directly receiving the information signal, wherein only one of the terrestrial stations includes answer signal generating and transmitting means for generating and transmitting an answer signal, representing status data collected from each of the plurality of terrestrial stations indicating whether or not each of the plurality of terrestrial stations correctly received the information signal, to the transmitting station via the communication satellite; and (d) a data link for separately connecting each of the terrestrial stations without the answer signal generating and transmitting means to the only one terrestrial station with the answer signal generating and transmitting means.
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Specification