[특허]Polar relay system for satellite communication

Polar relay system for satellite communication 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/19
출원번호	US-0423673 (1995-04-18)
발명자 / 주소	Stuart James R. (Louisville CO)
출원인 / 주소	Leo One IP, L.L.C. (St. Louis MO 02)
인용정보	피인용 횟수 : 64 인용 특허 : 0

초록 ▼

One of the preferred embodiments of the present invention is a telecommunications system that includes twelve satellites (S) which are equally deployed in four polar low Earth orbits (OR). A preferred embodiment provides a system for transmitting a message between two terminals (G) on the ground through a store-and-forward network. A first satellite (S1/OR1) traveling in a first polar orbit (OR1) receives and stores a message from a sending terminal (GA) on the surface of the Earth (E). As the first satellite (S1/OR1) passes over the North Pole (NP), it transmits the stored message from the sending terminal (GA) down to a relay station (GB) located near the North Pole (NP). The message is stored at this polar relay station (GB) until a second satellite (S1/OR2) moving in a second orbit (OR2) flies within range. At that time, the polar relay station (GB) sends the stored message up to the second satellite (S1/OR2), which stores the message and finally transmits it to a receiving terminal (GC) somewhere on the ground. This store-and-forward relay method takes advantage of the geometry of a system that employs more than one satellite which each operate in different polar orbits. The different polar orbits allow the satellites to fly over different parts of the globe frequently. The rotation of the Earth beneath the satellites allows every satellite in the system to fly over vast regions of the Earth\s surface and, therefore, to communicate with a very large number of terminals located virtually anywhere in the world. The present invention provides a wide variety of communication systems without requiring costly and complex intersatellite links.

대표청구항 ▼

A method of satellite communications comprising the steps of: operating a plurality of satellites (S) in a plurality of low Earth orbits (OR); providing a plurality of relay stations (GB); providing a plurality of user terminals (G) and distributing said user terminals (G) primarily in portions of the Earth (E) which are inhabited; locating each one of said plurality of relay stations (GB) at a latitude on Earth (E) to enable communicating between each one of said relay stations (GB) and each one of said plurality of satellites (S) as each one of said plurality of satellites (S) independently passes over a pole of the Earth (E); communicating between each one of said plurality of satellites (S) and at least one of said plurality of relay stations (GB); receiving and storing on board one of said plurality of satellites (S), a message from at least one of said plurality of terminals (G); transmitting said stored message from one of said plurality of satellites (S) to one of said plurality of relay stations (GB) where it is stored; re-transmitting said stored message from said relay station (GB) to a second one of said satellites (S2) for forwarding said stored message to a second one of said plurality of terminals (G); transmitting said message from said second satellite (S2) to a second one of said plurality of terminals (G); and tracking, telemetering, operating and controlling a system including said plurality of satellites (S); said plurality of user terminals (G) and said plurality of relay stations (GB) with at least one of said plurality of relay stations (GB).

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Polar relay system for satellite communication 원문보기

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Polar relay system for satellite communication 원문보기

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