Multiplex communications – Wide area network – Packet switching
Patent
1985-11-27
1989-03-14
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 691, 455 12, H04Q 1102
Patent
active
048130362
ABSTRACT:
A communication signal can be routed from any location in a spot beam satellite system to any other location within the spot beam system by simply choosing the proper carrier frequency for the uplink to the satellite. The spot beams are fully interconnected without any need for active switching within the satellite. An uplink signal received by one or more satellites in a particular orbit location may be routed, depending on its frequency, to any downlink spot beam. A network control center located on the ground in one of the spot beam coverage areas receives signalling requests from all the spot beam coverage areas and assigns frequencies so that the desired routing can be established. All of this is accomplished without any signal demodulation or active switching of circuit paths in the satellite.
REFERENCES:
patent: 4090036 (1978-05-01), Stott et al.
patent: 4339816 (1982-07-01), Reed
patent: 4513413 (1985-04-01), Gorman et al.
patent: 4528656 (1985-07-01), Morais
"A Satellite System with Limited-Scan Spot Beams" by Acampora et al., IEEE Trans. on Comm., vol. COM-27, No. 10, Oct. 1979; pp. 1406-1415.
National Exchange, Inc.
Olms Douglas W.
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