US5912883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for remote access to computer network
Assignee: Worldcomm Systems Inc
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Filing: 1996-11-01
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Granted: 1999-06-15
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Expires: 2016-11-01
Abstract
Abstract A system for remotely accessing computer networks is provided in which a central hub is connected to a computer network. The central hub may then be connected to a plurality of remote sites through an earth-orbiting satellite. Users at multiple remote sites may be connected to the central hub simultaneously through frequency management techniques.
Inventors
- 👤 David Hershberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:45
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/18578; H04B7/1858
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
156 words
A communication system for transferring data between a remote workstation and a computer network through an earth-orbiting satellite including a transponder operating in a frequency spectrum including a plurality of data channels, said communication system comprising: a central hub gateway server directly connected to a computer network, said central hub gateway server including a plurality of modems, each of said modems being respectively assigned to a particular one of said data channels, a first satellite transceiver connected to said modems, said first transceiver comprising a satellite antenna and a means for modulating the frequencies of data signals from said modems to a satellite frequency band; a remote workstation; and a second satellite transceiver connected to said remote workstation, said second transceiver comprising a satellite antenna and a frequency modulating means; said first and second transceivers both transferring data to and from said satellite such that data is transferred between said computer network and said remote workstation.
Claim 2
Dependent Claim
156 words
A communication system for transferring data between a remote workstation and a computer network through an earth-orbiting satellite including a transponder operating in a frequency spectrum including a plurality of data channels, said communication system comprising: a central hub gateway server directly connected to a computer network, said central hub gateway server including a plurality of modems, each of said modems being respectively assigned to a particular one of said data channels, a first satellite transceiver connected to said modems, said first transceiver comprising a satellite antenna and a means for modulating the frequencies of data signals from said modems to a satellite frequency band; a remote workstation; and a second satellite transceiver connected to said remote workstation, said second transceiver comprising a satellite antenna and a frequency modulating means; said first and second transceivers both transferring data to and from said satellite such that data is transferred between said computer network and said remote workstation.
Claim 3
Dependent Claim
16 words
The system as in claim 1, wherein said modems are single channel per carrier (SCPC) modems.
Claim 4
Dependent Claim
62 words
The system as in claim 1, wherein said modems are comprised of a first number of SCPC modems for receiving data from said satellite and a second number, less than the first number, of broad-band time division multiplex (TDM) modems for transmitting data to said satellite, each TDM modem transmitting data to multiple remote workstations through said satellite using addressed data packets.
Claim 5
Dependent Claim
17 words
The system as in claim 2, wherein said modems operate in a frequency division multiple access scheme.
Claim 6
Dependent Claim
22 words
The system as in claim 4, wherein said frequency spectrum of the transponder is further divided into a plurality of control channels.
Claim 7
Dependent Claim
27 words
The system as in claim 5, wherein there are five control channels contiguous with 1650 data channels, each of said channels having a bandwidth of 20 kHz.
Claim 8
Dependent Claim
17 words
The system as in claim 6, wherein said control and data channels are bounded by guard bands.
Claim 9
Dependent Claim
20 words
The system as in claim 7, wherein said transceivers operate in one of the C-band, Ku-band, L-band, X-band and Ka-band.
Claim 10
Dependent Claim
106 words
A communication system for transferring data between a remote terminal having a satellite transceiver and a computer network through an earth-orbiting satellite, said system comprising: a central hub gateway server directly connected to a computer network, said central hub gateway server including a plurality of modems, each of said modems being assigned to receive and transmit signals in a specified data channel; a first satellite transceiver connected to said modems, said first transceiver comprising a satellite antenna and a means for modulating the data signals from said modems to a satellite frequency band; said first transceiver transferring data between said computer network and said remote workstation.
Claim 11
Dependent Claim
106 words
A communication system for transferring data between a remote terminal having a satellite transceiver and a computer network through an earth-orbiting satellite, said system comprising: a central hub gateway server directly connected to a computer network, said central hub gateway server including a plurality of modems, each of said modems being assigned to receive and transmit signals in a specified data channel; a first satellite transceiver connected to said modems, said first transceiver comprising a satellite antenna and a means for modulating the data signals from said modems to a satellite frequency band; said first transceiver transferring data between said computer network and said remote workstation.
Claim 12
Dependent Claim
16 words
The system as in claim 9, wherein said modems are single channel per carrier (SCPC) modems.
Claim 13
Dependent Claim
62 words
The system as in claim 9, wherein said modems are comprised of a first number of SCPC modems for receiving data from said satellite and a second number, less than the first number, of broad-band time division multiplex (TDM) modems for transmitting data to said satellite, each TDM modem transmitting data to multiple remote workstations through said satellite using addressed data packets.
Claim 14
Dependent Claim
17 words
The system as in claim 10, wherein said modems operate in a frequency division multiple access scheme.
Claim 15
Dependent Claim
39 words
The system as in claim 12, wherein said transceivers communicate with a transponder of said satellite operating in a particular frequency spectrum, said frequency spectrum being divided into a plurality of control channels and a plurality of data channels.
Claim 16
Dependent Claim
30 words
The system as in claim 13, wherein there are about five control channels contiguous with about 1650 data channels, each of said channels having a bandwidth of about 20 kHz.
References Cited (Backward Citations)
US5280625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-06-14 | 2002-12-14 | 2003-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-14 | 2006-12-14 | 2007-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-14 | 2010-12-14 | 2011-06-15 | $7700.00 | Window Closed / Lapsed |