发明名称 |
HIGH PRECISION ACCESS POINT TO ACCESS POINT SYNCHRONIZATION IN AN INDOOR POSITION LOCATION SYSTEM |
摘要 |
Methods, systems, and devices are described that provide for high precision synchronization between pairs of APs within a tracking area of a position location network. These tools and techniques may provide for incrementally synchronizing timers and oscillators located at respective APs. An AP may transmit a course frequency and timing acquisition signal that a second AP utilizes to estimate a frequency offset and/or time offset. The AP may transmit a subsequent fine frequency and timing acquisition signal which may be used to accurately adjust the estimated frequency offset and/or time offset of the second AP. The second AP may thus incrementally synchronize its oscillator(s) and/or timer(s). These techniques may be utilized over a multi-hop wireless network. The methods, systems, and devices may be applicable to single- and multi-floor location tracking systems. |
申请公布号 |
EP3052955(A1) |
申请公布日期 |
2016.08.10 |
申请号 |
EP20140784155 |
申请日期 |
2014.09.23 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
GUPTA, ALOK KUMAR;STEIN, WILLIAM E.;KING, SCOTT HOWARD |
分类号 |
G01S1/02;G01S5/14;H04B7/26;H04W56/00 |
主分类号 |
G01S1/02 |
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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