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    • 8. 发明申请
    • MAPPING WIRELESS SIGNALS WITH MOTION SENSORS
    • 映射无线信号与运动传感器
    • US20110090081A1
    • 2011-04-21
    • US12851458
    • 2010-08-05
    • Behrooz KhorashadiSaumitra Mohan DasVinay SridharaAlok AggarwalChristopher Brunner
    • Behrooz KhorashadiSaumitra Mohan DasVinay SridharaAlok AggarwalChristopher Brunner
    • G08B1/08
    • G01S5/0252
    • A displacement device for mapping wireless signal fingerprints includes motion sensors and at least one of a received signal strength indicator (RSSI) sensor and a round trip time (RTT) sensor. The motion sensors may include a pedometer and one or more sensors to receive turn information. The start position of the displacement device is initialized and as the displacement device is moved through an environment, the position of each measurement location is determined using the initialized position and data from the motion sensors. The measurement position along with the RSSI and/or RTT measurement is stored in a database, from which a map can be generated. The position of the access point may be determined using the RSSI measurement or RTT measurement. Additionally, accumulated errors in the measurement position may be monitored and when greater than a threshold, a user may be prompted to reinitialize the position of the displacement device.
    • 用于映射无线信号指纹的位移设备包括运动传感器和接收信号强度指示器(RSSI)传感器和往返时间(RTT)传感器中的至少一个。 运动传感器可以包括计步器和用于接收转向信息的一个或多个传感器。 位移装置的起始位置被初始化,并且当位移装置移动通过环境时,使用来自运动传感器的初始化位置和数据来确定每个测量位置的位置。 测量位置与RSSI和/或RTT测量一起存储在数据库中,从中可以生成映射。 可以使用RSSI测量或RTT测量来确定接入点的位置。 此外,可以监视测量位置中的累积误差,并且当大于阈值时,可以提示用户重新初始化位移装置的位置。
    • 10. 发明授权
    • Mapping wireless signals with motion sensors
    • 用运动传感器映射无线信号
    • US08633817B2
    • 2014-01-21
    • US12851458
    • 2010-08-05
    • Behrooz KhorashadiSaumitra Mohan DasVinay SridharaAlok AggarwalChristopher Brunner
    • Behrooz KhorashadiSaumitra Mohan DasVinay SridharaAlok AggarwalChristopher Brunner
    • G08B1/08
    • G01S5/0252
    • A displacement device for mapping wireless signal fingerprints includes motion sensors and at least one of a received signal strength indicator (RSSI) sensor and a round trip time (RTT) sensor. The motion sensors may include a pedometer and one or more sensors to receive turn information. The start position of the displacement device is initialized and as the displacement device is moved through an environment, the position of each measurement location is determined using the initialized position and data from the motion sensors. The measurement position along with the RSSI and/or RTT measurement is stored in a database, from which a map can be generated. The position of the access point may be determined using the RSSI measurement or RTT measurement. Additionally, accumulated errors in the measurement position may be monitored and when greater than a threshold, a user may be prompted to reinitialize the position of the displacement device.
    • 用于映射无线信号指纹的位移设备包括运动传感器和接收信号强度指示器(RSSI)传感器和往返时间(RTT)传感器中的至少一个。 运动传感器可以包括计步器和用于接收转向信息的一个或多个传感器。 位移装置的起始位置被初始化,并且当位移装置移动通过环境时,使用来自运动传感器的初始化位置和数据来确定每个测量位置的位置。 测量位置与RSSI和/或RTT测量一起存储在数据库中,从中可以生成映射。 可以使用RSSI测量或RTT测量来确定接入点的位置。 此外,可以监视测量位置中的累积误差,并且当大于阈值时,可以提示用户重新初始化位移装置的位置。