发明授权
US08421675B2 Systems and methods for locating a mobile device within a cellular system
有权
用于在蜂窝系统内定位移动设备的系统和方法
- 专利标题： Systems and methods for locating a mobile device within a cellular system
- 专利标题（中）： 用于在蜂窝系统内定位移动设备的系统和方法
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申请号： US12426787申请日： 2009-04-20
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公开(公告)号： US08421675B2公开(公告)日： 2013-04-16
- 发明人: Geoffrey B. Rhoads , Tom Tewalt , Hugh L. Brunk , Tyler J. McKinley
- 申请人： Geoffrey B. Rhoads , Tom Tewalt , Hugh L. Brunk , Tyler J. McKinley
- 申请人地址： US OR Beaverton
- 专利权人： Digimarc Corporation
- 当前专利权人： Digimarc Corporation
- 当前专利权人地址： US OR Beaverton
- 代理机构： Digimarc Corporation
- 主分类号： G01S3/02
- IPC分类号： G01S3/02 ; H04W4/02
摘要：
A system for determining location and timing information in a cellular network includes a space-time calibration unit (SCU) and a plurality of nodes in communication with the SCU. Each node includes a node ping driver that receives frame synchronization information from a respective subset of cell sites, and associates the frame synchronization information with respective receive count stamps generated using a local node clock. The system also includes a user handset that includes a handset ping driver that receives the frame synchronization information from a serving cell site and one or more neighbor cell sites, and associates the frame synchronization information with respective receive count stamps generated using a local handset clock. The SCU uses the information from the node and handset ping drivers to determine a handset location.
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