发明名称 |
LOCATING SYSTEM AND METHOD USING A MOBILE COMMUNICATIONS NETWORK. |
摘要 |
<p>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).</p> |
申请公布号 |
MX9703646(A) |
申请公布日期 |
1997.08.30 |
申请号 |
MX19970003646 |
申请日期 |
1995.11.14 |
申请人 |
HIGHWAYMASTER COMMUNICATIONS, INC. |
发明人 |
LARRY C. WORTHAM |
分类号 |
G01S5/00;G01S5/14;G01S19/48;H04W64/00;(IPC1-7):H04Q07/00 |
主分类号 |
G01S5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|