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    • 4. 发明授权
    • Bluetooth transmission security pattern
    • 蓝牙传输安全模式
    • US09426657B2
    • 2016-08-23
    • US14460880
    • 2014-08-15
    • Facebook, Inc.
    • Mateusz Marek NiewczasManish Modi
    • H04W12/06H04W4/00
    • H04W12/06H04L63/12H04L63/18H04W4/029H04W4/80H04W12/10H04W12/12H04W84/18
    • Beacon devices transmit beacon messages that may be used to alert an application on a user device, e.g., a mobile phone, of the beacon device's proximity. Some embodiments contemplate a beacon device configured to transmit a pattern of successive beacon messages and/or Bluetooth Low Energy broadcast messages at one or more different power levels. The pattern of power levels may securely identify the beacon device. For example, the mobile phone application may confirm with a network server that the pattern agrees with the beacon device's identity. The pattern may also serve a calibration function. Where the mobile device application has knowledge of the expected power levels in the pattern, the application can infer from weaker transmissions that the beacon device is further from the mobile device. The weaker power levels may also indicate the character of the transmission environment.
    • 信标设备发送可用于向用户设备(例如移动电话)上的应用发送信标设备的接近度的信标消息。 一些实施例考虑了信标装置,其被配置为以一个或多个不同功率电平发送连续信标消息和/或蓝牙低能量广播消息的模式。 功率级别的模式可以安全地识别信标设备。 例如,移动电话应用可以向网络服务器确认该模式与信标设备的身份一致。 该图案也可以用于校准功能。 在移动设备应用程序具有模式中预期功率电平的知识的情况下,应用可以从较弱的传输中推断出信标设备进一步来自移动设备。 较弱的功率电平也可能表示传输环境的特性。
    • 9. 发明申请
    • BLUETOOTH CROWD-SOURCED TRIANGULATION
    • 蓝牙CROWD-SOURCED TRIANGULATION
    • US20160047887A1
    • 2016-02-18
    • US14460886
    • 2014-08-15
    • Facebook, Inc.
    • Mateusz Marek NiewczasManish Modi
    • G01S5/14
    • G01S5/14
    • Beacon devices transmit beacon messages to alert an application on a mobile user device of the Beacon device's proximity. A Received Signal Strength Indication (RSSI) field may indicate the power level at which the beacon message was received at the mobile device. Where the transmission power of the beacon device is standardized, the application can infer the distance between the mobile user device the beacon device based upon the RSSI field. By considering successive RSSI values over time while the mobile device is in motion, in conjunction with GPS information for the mobile device, the location of the beacon device relative to the mobile device may be inferred. Multiple mobile devices may be used together to infer the beacon device's position.
    • 信标设备传输信标消息以向移动用户设备上的信标提醒信标设备的接近度。 接收信号强度指示(RSSI)字段可以指示在移动设备处接收到信标消息的功率电平。 在标准化信标设备的发射功率的情况下,应用可以基于RSSI字段来推断移动用户设备信标设备之间的距离。 通过在移动设备运动期间考虑随时间推移的连续RSSI值,结合移动设备的GPS信息,可以推断信标设备相对于移动设备的位置。 可以一起使用多个移动设备来推断信标设备的位置。