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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0407799 (1995-03-20) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 282 인용 특허 : 0 |
A wireless telephone system (10) capable of servicing a roaming wireless telephone user (30) includes a satellite (22) communications system consisting of at least one orbiting satellite (22); at least one terrestrial-based gateway (12, 14, 16, 18) having access to a database (20) of users, destinat
A wireless telephone system (10) capable of servicing a roaming wireless telephone user (30) includes a satellite (22) communications system consisting of at least one orbiting satellite (22); at least one terrestrial-based gateway (12, 14, 16, 18) having access to a database (20) of users, destination codes (telephone numbers); at least one network coordinating gateway (28) within at least one satellite service area (24); a single network control center (25); and a plurality of terrestrial communications links (e.g. 101). The system (10) operates by effecting communication between a terrestrial wireless telephone end user transceiver apparatus (e.g. 501) and a terrestrial communications link (e.g. 101) via a single relay through a single satellite (22) or a succession of single relay satellites (22) wherein the relay station may be in motion relative to the end user transceiver apparatus (501) and the terrestrial communications link (101). The ground-based gateway (28) effects the ultimate decision on linking in cooperation with the network database to effect hand-off from a first orbiting satellite (22) to a second orbiting satellite (22). The single satellite (22) or preferably a constellation of satellites (22) orbiting near the earth need only translate signals from the gateways (12, 14, 16, 18) to the users (30) and from the users (30) to the gateways (12, 14, 16, 18), without satellite-based control.
A satellite communications system operative with at least one existing terrestrial communication system, comprising: at least one satellite in earth orbit; at least one terrestrial gateway that is bidirectionally coupled to said at least one existing terrestrial communications system, said at least
A satellite communications system operative with at least one existing terrestrial communication system, comprising: at least one satellite in earth orbit; at least one terrestrial gateway that is bidirectionally coupled to said at least one existing terrestrial communications system, said at least one terrestrial gateway further being bidirectionally coupled through first RF links to said at least one satellite for transmitting communications traffic to, and for receiving communications traffic from, said at least one satellite; a plurality of transceivers associated with users of said satellite communications system, each of said plurality of transceivers being bidirectionally coupled, when active, through second RF links to said at least one satellite for transmitting communications traffic to, and for receiving communications traffic from, said at least one satellite; a terrestrial data network; and at least one network coordinating gateway coupled to said at least one satellite through said first RF links for receiving requests for service from active transceivers, said at least one network coordinating gateway further being bidirectionally coupled through said terrestrial data network to said at least one terrestrial gateway for commanding said at least one terrestrial gateway to establish bidirectional communication links between selected ones of active transceivers that are requesting service and said existing terrestrial communications system; wherein communications traffic to an active one of said selected transceivers is passed through and repeated by said at least one satellite by being received from one of said first RF links, frequency shifted, and transmitted to one of said second RF links, without regard for any informational content of said communications traffic; and wherein communications traffic from an active one of said selected transceivers is passed through and repeated by said at least one satellite by being received from one of said second RF links, frequency shifted, and transmitted to one of said first RF links, without regard for any informational content of said communications traffic.
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