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US5884142A
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US
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Low earth orbit distributed gateway communication system
Assignee: THERMO FUNDING Co LLC
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Filing: 1997-04-15
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Granted: 1999-03-16
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Expires: 2017-04-15
Abstract
Abstract A communication system includes a satellite communication system segment having at least one satellite, that projects a plurality of beams on the surface of the earth, and at least one terrestrial satellite gateway that is bidirectionally coupled to the at least one satellite and also to a terrestrial communications system. One or more beams from one or more satellites at the surface of the earth define a regional service area within which at least one Wireless Local Loop (WLL) service region is located. The communication system further includes a terrestrial communication segment having at least one WLL base station, capable of bidirectional communications with a plurality of WLL user terminals within the WLL service region, and a virtual gateway that is bidirectionally coupled to the WLL base station and to the at least one satellite. The virtual gateway is responsive to the terrestrial satellite gateway for temporarily assuming control of some satellite system resources for bidirectionally coupling a communication to or from an individual one of the WLL user terminals into or out of the WLL service region.
Inventors
- 👤 Robert A Wiedeman
- 👤 Paul A Monte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:39
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/18578; H04B7/1853; H04B7/18545; H04B7/18556; H04B7/18567
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A method for operating a communication system, comprising steps of: receiving a call for a user terminal at a satellite system gateway; examining a database to determine if the user terminal is associated with a localized service area within a coverage area of the satellite system gateway; if yes, formulating a message and transmitting the message to a virtual gateway that serves the regional service area, the message being transmitted via at least one satellite; receiving the message at the virtual gateway and paging the user terminal; and upon the user terminal responding to the page, establishing the call using satellite system resources that are allocated to the virtual gateway from the satellite system gateway.
Claim 2
Independent Claim
115 words
A method for operating a communication system, comprising steps of: receiving a call for a user terminal at a satellite system gateway; examining a database to determine if the user terminal is associated with a localized service area within a coverage area of the satellite system gateway; if yes, formulating a message and transmitting the message to a virtual gateway that serves the regional service area, the message being transmitted via at least one satellite; receiving the message at the virtual gateway and paging the user terminal; and upon the user terminal responding to the page, establishing the call using satellite system resources that are allocated to the virtual gateway from the satellite system gateway.
Claim 3
Dependent Claim
15 words
A method as in claim 1, wherein the allocated satellite system resources comprise frequency channels.
Claim 4
Dependent Claim
15 words
A method as in claim 1, wherein the allocated satellite system resources comprise spreading codes.
Claim 5
Dependent Claim
14 words
A method as in claim 1, wherein the user terminal is a mobile terminal.
Claim 6
Dependent Claim
14 words
A method as in claim 1, wherein the user terminal is a fixed terminal.
Claim 7
Dependent Claim
22 words
A method as in claim 1, wherein the at least one satellite is a portion of a constellation of non-geosynchronous orbit satellites.
Claim 8
Independent Claim
196 words
A method for operating a communication system, comprising steps of: receiving a call for a user terminal at a virtual gateway that serves a localized service area within a coverage area of a satellite system gateway; examining a database to determine if the called user terminal is associated with a localized service area that is served by the virtual gateway; if yes, establishing the call; if no, formulating a message and transmitting the message to the satellite system gateway, the message being transmitted via at least one satellite; receiving the message at the satellite system gateway and examining a database to determine if the called user terminal is associated with a second localized service area within the coverage area of the satellite system gateway; if yes, formulating a message and transmitting the message to a second virtual gateway that serves the second localized service area, the message being transmitted via at least one satellite; receiving the message at the second virtual gateway and paging the user terminal; and upon the user terminal responding to the page, establishing the call using satellite system resources that are allocated to the second virtual gateway from the satellite system gateway.
Claim 9
Independent Claim
196 words
A method for operating a communication system, comprising steps of: receiving a call for a user terminal at a virtual gateway that serves a localized service area within a coverage area of a satellite system gateway; examining a database to determine if the called user terminal is associated with a localized service area that is served by the virtual gateway; if yes, establishing the call; if no, formulating a message and transmitting the message to the satellite system gateway, the message being transmitted via at least one satellite; receiving the message at the satellite system gateway and examining a database to determine if the called user terminal is associated with a second localized service area within the coverage area of the satellite system gateway; if yes, formulating a message and transmitting the message to a second virtual gateway that serves the second localized service area, the message being transmitted via at least one satellite; receiving the message at the second virtual gateway and paging the user terminal; and upon the user terminal responding to the page, establishing the call using satellite system resources that are allocated to the second virtual gateway from the satellite system gateway.
Claim 10
Dependent Claim
15 words
A method as in claim 7, wherein the allocated satellite system resources comprise frequency channels.
Claim 11
Dependent Claim
15 words
A method as in claim 7, wherein the allocated satellite system resources comprise spreading codes.
Claim 12
Dependent Claim
14 words
A method as in claim 7, wherein the user terminal is a mobile terminal.
Claim 13
Dependent Claim
14 words
A method as in claim 7, wherein the user terminal is a fixed terminal.
Claim 14
Dependent Claim
22 words
A method as in claim 7, wherein the at least one satellite is a portion of a constellation of non-geosynchronous orbit satellites.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-15 | 2002-09-14 | 2003-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-15 | 2006-09-14 | 2007-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-15 | 2010-09-14 | 2011-03-16 | $7700.00 | Window Closed / Lapsed |