针对航空电子光网络的实时性问题,建立了航空电子波分复用(WDM)环网模型,以实时消息流矩阵作为网络的输入,依据静态光网络最小化波长数目的优化目标,提出了一种基于多令牌协议的光网络波长分配方法,并推导了航电光网络中光通道的端到端传输时延计算公式。通过对理论计算和仿真结果的分析,此协议下的波长分配方法在网络中可以实现波长重用,比传统环网的波长数目平均降低了58.1%,优化了波长数目,并且多令牌控制协议满足航空电子网络对消息实时性的要求。此方法对于航空电子光网络的设计与性能分析具有参考价值。
To guarantee the real-time performance of an avionic optical network, a model of avionic wavelength division multiplexing (WDM) optical network is built with real-time message flow matrix as the input. According to the optimized aim of minimizing the number of wavelengths in a static optical network, a method of wavelength assignment based on multi-tokens with a priority protocol is proposed, and then the analytical transmission delay expression of an end-to-end system in the optical channel is derived from the proposed protocol. The analytical results show that by using the multi-tokens protocol, the number of wavelengths is reduced by 58.1% as compared with the conventional method, The protocol method optimizes the number of wavelengths, and allows their reuse in network implementation. Multi-tokens with a priority protocol can satisfy the real-time performance demands of avionic networks. A comparison between the theoretical calculation and analysis of simulation results shows that the proposed protocol has the prospect of being applied to the design and performance evaluation of avionic optical networks.
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