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 Title: |
US6208836:
Earth station acquisition system for satellite communications
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Albuquerque Moraes, Jose Luiz; Middlesex, United Kingdom
Lu, Sze-Ching; Surrey, United Kingdom
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| Assignee: |
ICO Services Ltd., London, United Kingdom
other patents from ICO SERVICES LTD. (762886) (approx. 19)
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| Published / Filed: |
2001-03-27
/ 1997-08-21
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| Application Number: |
US1997000915908
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| IPC Code: |
Advanced:
H04B 7/15;
H04B 7/185;
H04Q 7/16;
H04Q 7/34;
H04Q 7/38;
Core:
more...
IPC-7:
H04Q 7/20;
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| ECLA Code: |
H04B7/185M4B; H04B7/185M6;
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| U.S. Class: |
Current:
455/013.1;
455/427;
455/428;
455/430;
Original:
455/013.1;
455/427;
455/428;
455/430;
455/432;
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| Field of Search: |
455/427,430,12.1,13.1,525,456,433,450,451,452,428,432
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| Priority Number: |
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| Abstract: |
In a satellite communication system where user terminals 11 communicate via satellites 9A-E with earth stations 7A-E to join with a terrestrial telephone network 1, a controller 18 at a master earth station 7A monitors all earth stations 7A-E for a request for service received from a user terminal 11, then calculates which earth station 7A-E is best placed to service the request and instructs the best placed earth station 7B to service the request. In servicing the request, the best placed earth station 7B uses that earth station 5C whereat the user terminal 11 is registered as a visitor as the gateway into the terrestrial system 1 by routing all voice grade messages thereto and therefrom via a voice link 21. If the user terminal 11 is not registered at any earth station 7A-E, the best placed earth station becomes the earth station of registration and acts as a gateway. The user terminal can store the identity of the last earth station 7A-E whereat it was registered and can inform the controller 18 for direct use of that information.
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| Attorney, Agent or Firm: |
McDermott, Will & Emery ;
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| Primary / Asst. Examiners: |
Le, Thanh Cong; Woldetatios, Yemane
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE DE FI FR GB NL SE
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| Family: |
Show 7 known family members
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First Claim:
Show all 25 claims |
What is claimed is:
1. A satellite communication system comprising:
- a plurality of satellites;
- a user terminal comprising a transmitter to transmit a request for service;
- a plurality of earth stations each including:
- a receiver to receive the request for service from said user terminal via one of said plurality of satellites; and
- a switch to provide a gateway for call traffic between the user terminal and a terrestrial network; and
- a controller for selecting an earth station from said plurality of earth stations to service said request for service from the user terminal,
- wherein each earth station is configured to be responsive to reception of a request for service from said user terminal to calculate the position of said user terminal and signal said request for service with said calculated position to said controller, and said controller is configured to perform said selection of said earth station based on said signaled calculated position of said user terminal.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 7 U.S. patent(s) that reference this one
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