发明名称 |
Vehicle locating and communicating method and apparatus |
摘要 |
A method and apparatus for locating and communicating with vehicles is provided, including at least one mobile cellular unit connected to at least one microprocessor and installed within a vehicle. The microprocessor interrogates the mobile cellular unit to obtain location information from an overhead message stream transmitted from cellular telephone transmitter sites. The location is displayed on a display located in the vehicle or the microprocessor periodically instructs the mobile cellular unit to initiate a call to a host controller and, upon receipt of transmitting instructions from the host controller, transmits the location information for display on a screen connected to the host controller.
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申请公布号 |
US5884221(A) |
申请公布日期 |
1999.03.16 |
申请号 |
US19980049573 |
申请日期 |
1998.03.26 |
申请人 |
HIGHWAYMASTER COMMUNICATIONS, INC. |
发明人 |
WORTHAM, LARRY C. |
分类号 |
G01D4/00;G07C5/00;G08G1/123;H04B7/185;H04W4/00;H04W4/02;H04W4/04;H04W8/18;H04W60/04;H04W76/02;H04W88/02;(IPC1-7):H04Q7/22 |
主分类号 |
G01D4/00 |
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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