Method and apparatus for using satellites for reverse path communication in direct-to-home subscription information systems
US5708963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Feb 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/18571
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.