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Title: US5604920: Satellite cellular telephone and data communication system
[ Derwent Title ]


Country: US United States of America

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8 pages

 
Inventor: Bertiger, Bary R.; Scottsdale, AZ
Leopold, Raymond J.; Chandler, AZ
Peterson, Kenneth M.; Tempe, AZ

Assignee: Motorola, Inc., Schaumburg, IL
other patents from MOTOROLA, INC. (386735) (approx. 18,357)
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Published / Filed: 1997-02-18 / 1994-12-22

Application Number: US1994000363065

IPC Code: Advanced: H04B 7/185;
Core: more...
IPC-7: H04B 7/185; H04M 11/00;

ECLA Code: H04B7/185F;

U.S. Class: Current: 455/428; 455/013.1; 455/013.2; 455/436;
Original: 455/013.1; 455/013.2; 455/033.2; 455/033.4; 455/056.1; 379/060;

Field of Search: 455/12.1,13.1,13.2,13.3,13.4,33.1,33.2,33.3,33.4,34.1,54.1,56.1 379/059,60 342/353 370/104.1

Priority Number:
1994-12-22  US1994000363065
1993-04-21  US1993000050753

Abstract: A system for facilitating global cellular/trunked mobile communication is disclosed. This system permits communication with hand held and mobile mounted cellular telephones. The system permits two-way communications anywhere on or above the earth up to a particular height above the earth of several hundred nautical miles. The system employs a number of low-earth orbiting satellites moving about the earth in orbit. Links are provided from the satellites directly to the users and via the public switched telephone network to other users. The satellites are interconnected via links in a ring structure surrounding the earth. Switching is performed by each of the satellites. In addition, each of the satellites hands off a call as it moves out of the range of a particular user.

Attorney, Agent or Firm: Bogacz, Frank J. ;

Primary / Asst. Examiners: Faile, Andrew;

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Related Applications:
Application Number Filed Patent Pub. Date  Title
US1993000050753 1993-04-21    1995-04-25  Satellite cellular telephone and data communication system


       
Parent Case:     This is a continuation of Ser. No. 08/050,753, filed Apr. 21, 1993, now U.S. Pat. No. 5,410,728.

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First Claim:
Show all 7 claims
What is claimed is:     1. A satellite cellular system comprising:
  • users communicating with each other via uplinks and downlinks of a first satellite;
  • handing-off that ongoing communication from a first cell to a second cell by transferring the ongoing communication from the uplinks and the downlinks of the first satellite to different uplinks and downlinks of another satellite; and
  • handing-off that ongoing communication from a first cell to a second by transferring the ongoing communication from the uplinks and the downlinks of the first satellite to different uplinks and downlinks of the first satellite.


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Forward References: Show 11 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (11)   |   Backward references (3)   |   Citation Link

Buy
PDF
Patent  Pub.Date  Inventor Assignee   Title
Buy PDF- 13pp US5396643  1995-03 Frenzer et al.  Motorola, Inc. Geographic-area selective low-earth satellite-based paging broadcast system and method
Buy PDF- 33pp US5408237  1995-04 Patterson et al.  Teledesic Corporation Earth-fixed cell beam management for satellite communication system
Buy PDF- 11pp US5410728  1995-04 Bertiger et al.  Motorola, Inc. Satellite cellular telephone and data communication system
       
Foreign References: None

Other References:
  • "Crosslink Archeitectures for a Multiple Satellite System"; Binder et al; IEEE, vol. 75, No. 1 Jan. 1987; pp. 74-81. (9 pages) Cited by 13 patents
  • "Landmobile Satellites Pick Up Where Cellular Radio Leaves Off", Kachmar, Microwaves & RF; Aug. 1984; pp. 33-35. (3 pages) Cited by 10 patents


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