Method and apparatus for using satellites for reverse path commu

Details Method and apparatus for using satellites for reverse path commu Method and apparatus for using satellites for reverse path commu

1995-02-24

1998-01-13

Pham, Chi H.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455 32, 455 41, 455 51, H04B 7185, H04B 719, H04B 7195

Patent

active

057089639

ABSTRACT:
Apparatus for using a low earth orbit satellite for reverse path communication in a subscription information service delivery system comprises a receiver adapted to receive a subscription information service signal at frequencies exceeding 1 GHz via a first path. Responsive to a poll, the receiver is adapted to transmit a response signal to the poll at frequencies under 1 GHz via a second path to a low earth orbit satellite. The polling request may be transmitted with the subscription information service signal or through the low earth orbit satellite. Preferably, the polling request is addressed and comprises a response message length field. The response comprises a service provider identifier and a subscriber identifier and further, preferably comprises response data encrypted by a key known to the service provider.

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