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研究了IP over WDM网络中IP业务流量的突发性对底层光脉冲传输的影响。突发的IP业务流量使WDM网络中传输信号的信道数目服从泊松分布,在非线性薛定谔方程(NLSE)的基础上进行IP流量分析,通过数值计算,考查了IP业务流量对四波混频(FWM)和交叉相位调制(XPM)的综合影响,得到了不同输入光功率、不同流量负荷下的眼图。结果表明,40信道的WDM网络中,当输入信号光功率大于5 dBm时,IP流量负荷的改变将会对网络性能产生剧烈的影响。同时,通过公式计算出FWM功率、比特误码率与输入光功率、流量负荷、信道间隔的关系,突出强调了不同信道分布对探测信道FWM效应的不同影响。
The effect of burst of IP traffic in IP over WDM networks on the transmission of the underlying optical pulse is studied. Sudden IP traffic makes the number of transmitted signals in the WDM network obey Poisson distribution. Based on the nonlinear Schrodinger equation (NLSE), IP traffic is analyzed. Through numerical calculation, the effect of IP traffic on the four-wave mixing (FWM) and cross-phase modulation (XPM), the eye diagrams of different input optical powers and different traffic loads are obtained. The results show that when the input signal optical power is greater than 5 dBm in a 40-channel WDM network, the change of IP traffic load will have a drastic impact on the network performance. At the same time, the relationship between FWM power, bit error rate, input optical power, traffic load and channel spacing is calculated by formulas, highlighting the different effects of different channel distributions on the FWM effect of the sounding channel.