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1. WO2000041340 - METHOD AND APPARATUS FOR PROVIDING WIDEBAND SERVICES USING MEDIUM AND LOW EARTH ORBIT SATELLITES

Publication Number WO/2000/041340
Publication Date 13.07.2000
International Application No. PCT/US2000/000429
International Filing Date 07.01.2000
IPC
H04B 7/185 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations
H04B 7/19 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations
19Earth-synchronous stations
H04B 7/195 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations
195Non-synchronous stations
CPC
H04B 7/18513
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
1851Systems using a satellite or space-based relay
18513Transmission in a satellite or space-based system
H04B 7/18515
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
1851Systems using a satellite or space-based relay
18515Transmission equipment in satellites or space-based relays
H04B 7/18541
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
1853Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
18539Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
18541for handover of resources
H04B 7/18578
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
18578Satellite systems for providing broadband data service to individual earth stations
H04B 7/1858
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
18578Satellite systems for providing broadband data service to individual earth stations
1858Arrangements for data transmission on the physical system, i.e. for data bit transmission between network components
H04B 7/19
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
19Earth-synchronous stations
Applicants
  • HUGHES ELECTRONICS CORPORATION [US/US]; 200 N. Sepulveda Boulevard El Segundo, CA 90245-0956, US
Inventors
  • WANG, Arthur, W.; US
Agents
  • GUDMESTAD, Terje ; Hughes Electronics Corporation 200 N. Sepulveda Boulevard El Segundo, CA 90245-0956, US
Priority Data
09/346,44401.07.1999US
60/115,28507.01.1999US
60/115,28707.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR PROVIDING WIDEBAND SERVICES USING MEDIUM AND LOW EARTH ORBIT SATELLITES
(FR) PROCEDE ET DISPOSITIF ASSURANT DES SERVICES A LARGE BANDE A L'AIDE DE SATELLITES SUR ORBITES TERRESTRES BASSES ET MOYENNES
Abstract
(EN)
A method and apparatus for mitigating communications interference between satellite communications systems in different orbits is disclosed. The method comprises the steps of evaluating a geometrical relationship between a second ground station and the satellites in the second satellite constellation, and directing communications between the second ground station and the second satellite according to the evaluated geometrical relationship. In one embodiment communications are handed over from a first satellite to another satellite when the first satellite is no longer at the highest elevation angle of visible satellites. In another embodiment, handover occurs when the first satellite drops below a minimum elevation angle.
(FR)
L'invention concerne un procédé et un dispositif permettant d'atténuer les interférences des télécommunications entre des systèmes de communication satellitaires sur différentes orbites. Ce procédé consiste à déterminer une relation géométrique entre une seconde station terrestre et les satellites de la seconde constellation de satellites, et à diriger les communications entre cette seconde station et lesdits satellites selon la relation géométrique déterminée. Dans un mode de réalisation, les communications sont transférées d'un premier satellite à un autre lorsque l'angle d'élévation de ce premier satellite n'est plus le plus élevé parmi les satellites visibles. Dans un autre mode de réalisation, le transfert s'effectue lorsque l'angle d'élévation du premier satellite tombe en dessous d'une valeur minimale.
Also published as
Latest bibliographic data on file with the International Bureau