基于多令牌协议航电WDM光环网波长分配方法  

Wavelength Assignment for Avionic WDM Optical Ring Network Based on Multi-tokens Protocol

作　　者：刘晓敏[1] 丁凡[1] 赵长啸[1] 熊华钢[1] 屠晓杰[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《航空学报》2012年第5期879-885,共7页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(60879024)~~

摘　　要：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-to-kens 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.

关 键 词：航空电子 光网络 波分复用(WDM) 路由与波长分配(RWA) 令牌协议 

分 类 号：V243.1[航空宇航科学与技术—飞行器设计] TP393[自动化与计算机技术—计算机应用技术]