Ground-station system, ground station, device, method

Details Ground-station system, ground station, device, method Ground-station system, ground station, device, method

1997-11-13

2000-05-16

Vo, Nguyen

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

455412, 455427, H04B 7185

Patent

active

060648589

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a ground-station system comprising a first ground station which is provided with comprising an identification code, first aerial, for the reception and processing of the first satellite signal and comprising a first output for the generation of a first outgoing signal, and comprising a second ground station which is provided with comprising an identification code, second aerial, for the reception and processing of the second satellite signal and comprising a second output for the generation of a second outgoing signal, and
2. Description of the Prior Art
Such a ground-station system is generally known and makes use, for example, of four satellites which are each situated at such a height above the earth's surface and are each situated at such a degree of longitude and degree of latitude that an attempt can be made to contact at least one of the four satellites from virtually any terrestrial location, and in which the total of the four satellites can try to contact with virtually any terrestrial location. From certain terrestrial locations, of course, contact can be sought with more than one satellite, such as two or even three satellites, and preferably, a ground station will be sited at such a certain location.
The first ground station of a first operator is then situated in a first country and can try to contact, for example, the first, second and third satellite, the first ground station then having control over three first aerials. A first mobile station situated within the range of the first, second or third satellite in that case transmits the first satellite signal comprising a first identification code, such as, for example, a first ground-station identification code, to the first, second or third satellite which passes the first satellite signal comprising the first ground-station identification code, to the first ground station. The first satellite signal, comprising the first ground-station identification code and received via one of the three first aerials, is processed via the first processing arrangement, in response to which the first outgoing signal is generated. Under these circumstances, the first detection arrangement detects said first ground-station identification code, from which it then emerges that the first satellite signal, comprising the first ground-station identification code, is intended for the first ground station.
The second ground station of a second operator is then situated in a second country and can try to contact, for example, the third and fourth satellite, the second ground station then having control over two second aerials. A second mobile station situated within the range of the third or fourth satellite in that case transmits the second satellite signal, comprising a second identification code, such as, for example, a second ground-station identification code, to the third or fourth satellite which passes the second satellite signal, comprising the second ground-station identification code, to the second ground station. The second satellite signal, comprising the second ground-station identification code and received via one of the two second aerials, is processed via the second processing arrangement, in response to which the second outgoing signal is generated. Under these circumstances, the second detection arrangement detects the second ground-station identification code, from which it then emerges that the second satellite signal, comprising the second ground-station identification code, is intended for the second ground station.
If the user with his mobile station is situated, for example, within the range of the third satellite, he can generate either the first satellite signal, comprising the first ground-station identification code, or the second satellite signal, comprising the second ground-station identification code. In this case, the first ground station then responds, after detecting the first ground-station identification code, to the first satellite signal and the se

REFERENCES:
patent: 5070537 (1991-12-01), Ohira et al.
patent: 5509004 (1996-04-01), Bishop, Jr. et al.

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