发明名称 |
Geolocation responsive radio telecommunication system and method therefor |
摘要 |
A radio telecommunication system includes a number of satellites in low earth orbits. Any number of subscriber units communicates with the satellites. A single subscriber unit communicates with a single satellite using electromagnetic signals so that a measurement processor can obtain Doppler component, propagation duration, and real time measurements of the signals. A location processor converts these measurements into a geographic location with respect to the earth. A service processor determines which qualifications to apply to communication services offered by the system. These qualifications are based on the subscriber unit's location. A call processor carries out the qualifications when requests to setup calls involving the subscriber unit are received by the system and during calls involving the subscriber unit.
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申请公布号 |
US5500648(A) |
申请公布日期 |
1996.03.19 |
申请号 |
US19930105730 |
申请日期 |
1993.08.11 |
申请人 |
MOTOROLA, INC. |
发明人 |
MAINE, KRISTINE P.;OLDS, KEITH A.;DAVIEAU, GERALD J. |
分类号 |
G01S5/00;G01S5/06;G01S5/12;(IPC1-7):G01S5/02 |
主分类号 |
G01S5/00 |
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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