发明名称 |
Determining wireless device locations |
摘要 |
Wireless network devices can obtain their geographical location by triangulating with access points that have precise time information. In response to a location prompt, a wireless device can send a transmission to multiple access points that are within its range. The different times at which the transmission is received at different access points can be collected and forwarded to a server, which can compute the location of the wireless device using triangulation techniques. The access points can calibrate their own time bases from time services received from global position satellites.
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申请公布号 |
US2003001776(A1) |
申请公布日期 |
2003.01.02 |
申请号 |
US20010896772 |
申请日期 |
2001.06.29 |
申请人 |
HANNAH ERIC C.;TENNENHOUSE DAVID L. |
发明人 |
HANNAH ERIC C.;TENNENHOUSE DAVID L. |
分类号 |
G01S5/00;G01S5/14;G01S19/25;(IPC1-7):G01S1/24 |
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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