发明名称 |
Communication system with direct link to satellite |
摘要 |
A communication system includes satellites and satellite phones communicating through the satellites directly. The satellite phone forms a highly directed beam toward a satellite of the communications system and adaptively maintains a beam to track the satellite as the satellite phone and/or the satellite moves relative to each other. The satellite phone contains sensors which provide steering information for directing the satellite phone's antenna beam. The communication system links a satellite phone with either another satellite phone and/or a ground based communication system connected to conventional telephone stations. The satellite phone also includes a database that contains the positional information of all potential communication satellites. The communication system coordinates satellite phone beams with a satellite network to facilitate high quality handoffs. Satellite phones can access several satellite networks based upon stored parameters or actively downloaded satellite information.
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申请公布号 |
US5995041(A) |
申请公布日期 |
1999.11.30 |
申请号 |
US19960774457 |
申请日期 |
1996.12.30 |
申请人 |
AT&T CORP. |
发明人 |
BRADLEY, JAMES FREDERICK;COOPER, PAUL W. |
分类号 |
G01S19/35;H04B7/185;(IPC1-7):G01S5/02 |
主分类号 |
G01S19/35 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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