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 Title: |
US5634190:
Low earth orbit communication satellite gateway-to-gateway relay system
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Wiedeman, Robert A.; Los Altos, CA
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| Assignee: |
Globalstar L.P., San Jose, CA
other patents from GLOBALSTAR L.P. (719374) (approx. 64)
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| Published / Filed: |
1997-05-27
/ 1995-06-06
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| Application Number: |
US1995000465938
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| IPC Code: |
Advanced:
H04B 7/185;
H04B 7/216;
Core:
H04B 7/204;
more...
IPC-7:
H04B 7/185;
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| ECLA Code: |
H04B7/185M;
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| U.S. Class: |
Current:
455/013.1;
455/012.1;
455/015;
Original:
455/013.1;
455/015;
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| Field of Search: |
455/12.1,13.1,13.2,15,20,33.1,54.1,56.1
375/200
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| Priority Number: |
| 1995-06-06 |
US1995000465938 |
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| Abstract: |
This invention teaches the use of overlapping footprints in a LEO satellite communications system to increase the overall connectivity of the system, thus providing a wide service availability. In particular, this invention teaches the use of at least one terrestrial LEOS relay station (70) that is positioned within an overlap of at least two satellite coverage areas for relaying a communication from a gateway (18A) associated with a first coverage area to a gateway (18B) associated with a second coverage area. A plurality of LEOS relay stations can be so provided to enable a communication, such as a voice communication, to be routed through a plurality of coverage areas and gateways, thereby bypassing a substantial portion of an underlying terrestrial communication system.
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| Attorney, Agent or Firm: |
Perman & Green LLP ;
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| Primary / Asst. Examiners: |
Eisenzopf, Reinhard J.; Banks-Harold, Marsha D.
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| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
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| Designated Country: |
AU BR MX RU SG UA DE FI FR GB IT
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| Family: |
Show 10 known family members
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First Claim:
Show all 14 claims |
What is claimed is:
1. A communication system, comprising:
- at least first and second earth orbiting satellites individual ones of which comprise means for transceiving first communication signals with terrestrially located user terminals and for transceiving second communication signals with terrestrially located stations, said first communication signals being within a first band of frequencies and said second communication signals being within a second band of frequencies, said at least two earth orbiting satellites having first and second terrestrial coverage areas, respectively;
- at least one terrestrial repeater station that is located within an overlapped region between said first and second terrestrial coverage areas, said at least one terrestrial repeater station being comprised of a first transceiver for receiving a first communication signal from a first one of said satellites associated with said first satellite coverage area and for transmitting said received first communication signal to a second one of said satellites associated with said second satellite coverage area, whereby a communication forward link is established between a first station located within said first satellite coverage area and a second station located within said second satellite coverage area;
- wherein said at least one terrestrial repeater station is further comprised of a second transceiver for receiving a first communication signal from said second one of said satellites associated with said second satellite coverage area and for transmitting said received first communication signal to said first one of said satellites associated with said first satellite coverage area, whereby a communication return link is established between said first station and said second station.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 53 U.S. patent(s) that reference this one
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| U.S. References: |
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All U.S. references
| Forward references (53)
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Backward references (23)
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Citation Link
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PDF |
Patent |
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Ichikawa |
NEC Corporation |
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1991-12 |
Mallinckrodt |
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Lee |
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1993-08 |
Ames |
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Repeater diversity spread spectrum communication system
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1993-08 |
Linquist et al. |
Pagemart, Inc. |
Simulcast satellite paging system with provision for signal interruption
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1994-04 |
Wiedeman |
Space Systems/Loral, Inc. |
Wireless telephone/satellite roaming system
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US5327572 |
1994-07 |
Freeburg |
Motorola, Inc. |
Networked satellite and terrestrial cellular radiotelephone systems
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1994-08 |
Mallinckrodt |
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1995-04 |
Bertiger et al. |
Motorola, Inc. |
Satellite cellular telephone and data communication system
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1995-05 |
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TRW Inc. |
Medium-earth-altitude satellite-based cellular telecommunications
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1995-06 |
Hirshfield et al. |
Space Systems/Loral, Inc. |
Mobile communication satellite payload
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1995-07 |
Horstein et al. |
TRW Inc. |
Medium-earth-altitude satellite-based cellular telecommunications system
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1995-08 |
Horstein et al. |
TRW Inc. |
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1995-08 |
Mallinckrodt |
Celsat America, Inc. |
Integrated cellular communications system
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US5448623 |
1995-09 |
Wiedeman et al. |
Space Systems/Loral, Inc. |
Satellite telecommunications system using network coordinating gateways operative with a terrestrial communication system
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USRE32905 |
1989-04 |
Baran |
Equatorial Communications Company |
Satellite communications system and apparatus
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USRE32905B1 |
1989-04 |
Baran |
Equatorial Communications Company |
Satellite communications system and apparatus
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| Foreign References: |
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| Other Abstract Info: |
DERABS G97-044548
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| Other References: |
"Iridum System Overview", Modern Science and Technology Monthly, Nov. 1991, pp. 1-5.
Petition of American Mobile Satellite Corporation Before the FCC, Washington, DC 20554, dated Jun. 3, 1991, pp. 1-15.
Application of Motorola Satellite Communications, Inc. for Iridium A Low Earth Orbit Mobile Satellite System before the FCC, Washington, D.C. Dec. 1990, pp. 49-96.
Before the FCC, Washington, D.C. 20554, Aries Constellation Low Earth Orbit Satellite System Proposal of Constellation Communications, Inc. Jun. 3, 1991, Appendix A, B, and C.
"Application of TRW Inc. for Authority to Construct a New Communications Satellite System Odyssey" before the FCC, Washington, D.C. 20554, May 31, 1991 pp. 33-51.
Application of Ellipsat Corporation Ellipsat for the Authority to Construct Ellipso R I An Elliptical Orbit Satellite System, before the FCC, Washington, D.C. 20554, Nov. 2, 1990, pp. 5-34.
Application of Loral Cellular Systems, Corp., Globalstar Mobile COmmunications Wherever You Are, before the FCC, Washington, D.C. Jun.3, 1991, pp. 94-187.
"An Integrated Satellite-Cellular Land Mobile System for Europe", E. Del Re, University of Florence, Dept. of Electronics Engineering, italy, Sep. 21, 1989.
"Current and Future Mobile Satellite Communication Systems", S. Kato et al., IEICE Transactions, vol. E 74, No. 8 Aug. 1991, pp. 2201-2210.
(10 pages)
Cited by 47 patents
[ISI abstract]
"Digital Network Oriented Mobile Radio Satellite System as an Integrated Part of the GSM Cellular Radio System in Europe", P. Dondl, Deutsch BUndespost/Fernmeldetechniches Zentralmt/Darmstadt, Sep. 21, 1989 Feb. Rep. Germ.
"The OniTRACS" Mobile Satellite Communications and Positioning System, E. Tiedemann, Jr. et al., Vehicle Electronics in the 90's: Proceedings of the In'l Congress on Transporation Electronics, Oct. 1990.
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"Increased Capacity Using CDMA for Mobile Satellite Communication", K. Gilhousen et al., IEEE Journal on Selected Areas in Communications, vol. 8, No. 4, May 1990, pp. 503-514.
(12 pages)
Cited by 54 patents
"The Iridium.TM.1 System --A Revolutionary Satellite Communications System Developed with Innovative Applications of Technology", D. Sterling et al., IEEE, Milcom 1991, Nov. 4-7.
"Iridium: Key to Worldwide Cellular Communications", J. Foley, Telecommunications, Oct. 1991, pp. 23-28.
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