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对航空电子波分复用(WDM,Wavelength Division Multiplexing)网络实时性评估问题,采用网络演算理论,提出了一种周期消息在WDM复杂虚拓扑上多跳端对端最大延迟的计算方法.建立了波长路由器WDM网络模型,分析了消息流端对端延迟的组成部分.针对网络演算理论下的WDM网络通信模型,推导了消息经单节点和多节点波长路由器的最大延迟的计算公式.并结合实际航空电子系统对公式进行了修正,解决了突发度过大的问题.最终得到最大延迟的紧密上限.最后在OPNET仿真环境下验证了计算分析方法的有效性.
For the problem of real-time evaluation of the Wavelength Division Multiplexing (WDM) network, this paper proposes a method to calculate the maximum delay of multi-hop end-to-end of periodic message in WDM complex virtual topology based on network calculus theory. Wavelength router WDM network model, analyzes the components of the end-to-end delay of message flow.According to the WDM network communication model under network calculus theory, the formula of maximum delay of message passing through single-node and multi-node wavelength routers is deduced and combined with the actual The avionics system corrects the formula to solve the problem of excessive burst, and finally gets the tight upper limit of the maximum delay. Finally, the validity of the computational analysis method is verified in the OPNET simulation environment.