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    • 10. 发明申请
    • Intrusion Detection in Optical Fiber Networks
    • 光纤网络入侵检测
    • US20080018884A1
    • 2008-01-24
    • US11624330
    • 2007-01-18
    • David ButlerScott ThompsonLev Sofman
    • David ButlerScott ThompsonLev Sofman
    • G01N21/00
    • H04B10/85
    • A method for intrusion detection in an optical fiber communication network. The method includes at a first location on an optical fiber segment, receiving a set of multiple optical signals having wavelengths differing from each other, measuring received signal power for each of the received multiple optical signals, and repeating the receiving and the measuring steps. Each optical signal in the repeated steps has same wavelength as corresponding received optical signal in the initial steps. The method further includes computing a signal power loss between each received optical signal in the repeated set and the corresponding optical signal in the initial set, fitting a curve of signal power loss vs. wavelength to the computed signal power losses using a statistical analysis, and if the signal power loss of the curve over a preselected wavelength band is at least as great as a preselected minimum loss level, providing intrusion notification.
    • 一种光纤通信网络入侵检测方法。 该方法包括在光纤段上的第一位置处,接收一组具有彼此不同的波长的多个光信号,测量接收到的多个光信号中的每一个的接收信号功率,并重复接收和测量步骤。 重复步骤中的每个光信号在初始步骤中具有与对应的接收光信号相同的波长。 该方法还包括计算重复集合中每个接收到的光信号与初始集合中对应的光信号之间的信号功率损耗,使用统计分析将信号功率损耗与波长的曲线拟合到计算出的信号功率损耗;以及 如果在预选波长带上的曲线的信号功率损耗至少与预选的最小损耗水平一样大,则提供入侵通知。