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    • 4. 发明授权
    • Method and system for providing location updates
    • 提供位置更新的方法和系统
    • US07489939B2
    • 2009-02-10
    • US11278665
    • 2006-04-04
    • James Ashley, Jr.Frank MooneyPatrick Mooney
    • James Ashley, Jr.Frank MooneyPatrick Mooney
    • H04Q7/20
    • G01S5/0027G01S19/17H04W4/021H04W4/90H04W8/12H04W76/50
    • A method and system of updating location information of a portable computing device is disclosed. Location data is received from a positioning device. A voice link is utilized for communication between the portable computing device and a call center. A dual-tone multi-frequency signal is mapped to a pre-determined range of movement. The dual-tone multi-frequency signal is transmitted to the call center when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of longitude change of location of the portable computing device. In addition, the dual-tone multi-frequency signal is transmitted to the call center when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of latitude change of location of the portable computing device.
    • 公开了一种更新便携式计算设备的位置信息的方法和系统。 从定位装置接收位置数据。 语音链路用于便携式计算设备和呼叫中心之间的通信。 双音多频信号被映射到预定的移动范围。 当位置数据中的经度测量表示处于预先确定的运动范围内的经度变化时,双音多频信号被发送到呼叫中心。 作为便携式计算装置的位置经度变化的指标,发送双音多频信号。 此外,当位置数据中的纬度测量表示在预定的运动范围内的纬度变化时,双音多频信号被发送到呼叫中心。 作为便携式计算装置的位置的纬度变化的指标,发送双音多频信号。