发明名称 |
System and method for locating a mobile unit within the service area of a mobile communications network |
摘要 |
A differential positioning system (10) includes components of a satellite-based or land-based positioning system (12) and components of a mobile communications network (14). The differential positioning system (10) provides accurate and immediate position information to a mobile unit (17). A transmitter site (40) of a mobile communications network (14) is associated with a reference positioning receiver (38). The reference positioning receiver (38) generates correction data for transmission to the mobile unit (17). The mobile unit (17) includes a mobile communications device (42) for receiving the correction data generated by the reference positioning receiver (38) and a mobile positioning receiver (24) for generating a position fix. The mobile unit (17) refines the position fix generated by the mobile positioning receiver (24) using correction data received by the mobile communications device (42).
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申请公布号 |
US6748226(B1) |
申请公布日期 |
2004.06.08 |
申请号 |
US19980219113 |
申请日期 |
1998.12.23 |
申请人 |
MINORPLANET SYSTEMS USA, INC. |
发明人 |
WORTHAM LARRY C. |
分类号 |
G01S5/00;G01S5/14;G01S19/48;H04W64/00;(IPC1-7):H04Q7/34 |
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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