发明名称 |
SYSTEM FOR SETTING COARSE GPS TIME IN A MOBILE STATION WITHIN AN ASYNCHRONOUS WIRELESS NETWORK |
摘要 |
A method and apparatus for setting coarse GPS time in a GPS receiver in a mobile station (MS) that is communicating with a base station and a position determining entity (PDE). The MS requests an assistance message from the PDE that includes a sequence of predicted navigation bits, including a predicted time indicator field, which is then located and decoded. Coarse time is set responsive to the time indicator value. A Pattern Match Algorithm may be performed to provide more precise GPS time. In order to better set coarse time, an expected error in the Time of Week may be determined, by for example using the expected network latency. The system described herein enables the use of IS-801 protocol by an MS in asynchronous networks by improving the coarse time setting process. |
申请公布号 |
WO2005017551(A2) |
申请公布日期 |
2005.02.24 |
申请号 |
WO2004US23693 |
申请日期 |
2004.07.23 |
申请人 |
QUALCOMM INCORPORATED;FARMER, DOMINIC;LEIRER, LASZLO |
发明人 |
FARMER, DOMINIC;LEIRER, LASZLO |
分类号 |
G01S1/00;G01S5/02;G01S19/25 |
主分类号 |
G01S1/00 |
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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