Patent US5138631A successfully refreshed from Google Patents.
US5138631A
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US
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Satellite communication network
Assignee: Gilat Satellite Networks Ltd
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Filing: 1989-12-21
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Granted: 1992-08-11
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Expires: 2009-12-21
Abstract
Abstract A satellite communication system has a hub earth station and a plurality of terminal earth stations. Each inbound satellite communication link from a terminal earth station to the hub earth station carries digital data packets encoded in CDMA code for code division multiple access at a first bit rate during synchronized time slots on a contention channel. An outbound communication link from the hub earth station to the terminal earth stations sends time division multiplexed digital data at a second bit rate higher than the first bit rate. A number of systems may share the same hub, with each system using a different CDMA code.
Inventors
- 👤 Desmond P. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
H; H04; H04J; H04J13/00; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/216
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A satellite communication system comprising: a hub earth station means; and a plurality of terminal earth station means, said terminal earth station means for providing an inbound satellite communication link from each of said terminal earth station means to said hub earth station means and for sending digital data packets encoded in CDMA code for code division multiple access at a first bit rate during synchronized time slots on a contention channel, and said hub earth station means for providing an outbound communication link to said terminal earth station means and for sending time division multiplexed digital data at second bit rate higher than said first bit rate.
Claim 2
Dependent Claim
108 words
A satellite communication system comprising: a hub earth station means; and a plurality of terminal earth station means, said terminal earth station means for providing an inbound satellite communication link from each of said terminal earth station means to said hub earth station means and for sending digital data packets encoded in CDMA code for code division multiple access at a first bit rate during synchronized time slots on a contention channel, and said hub earth station means for providing an outbound communication link to said terminal earth station means and for sending time division multiplexed digital data at second bit rate higher than said first bit rate.
Claim 3
Dependent Claim
130 words
A satellite communication network comprising: a hub earth station means; and a plurality of satellite communication systems; each system including said hub earth station means and a plurality of terminal earth station means, said terminal earth station means for providing an inbound satellite communication link from each of said terminal earth station means to said hub earth station means and for sending digital data packets encoded in CDMA code for code division multiple access at a first bit rate during synchronized time slots on a contention channel, and said hub earth station means for providing an outbound communication link to said terminal earth station means for sending time division multiplexed digital data at a second bit rate higher than said first bit rate, each system having a different CDMA code.
Claim 4
Dependent Claim
130 words
A satellite communication network comprising: a hub earth station means; and a plurality of satellite communication systems; each system including said hub earth station means and a plurality of terminal earth station means, said terminal earth station means for providing an inbound satellite communication link from each of said terminal earth station means to said hub earth station means and for sending digital data packets encoded in CDMA code for code division multiple access at a first bit rate during synchronized time slots on a contention channel, and said hub earth station means for providing an outbound communication link to said terminal earth station means for sending time division multiplexed digital data at a second bit rate higher than said first bit rate, each system having a different CDMA code.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |