保证航电波分复用网络实时性的虚拓扑设计  

Virtual Topology Designed for Real-Time Avionics WDM Network

作　　者：熊颖[1] 丁凡[1] 熊华钢[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：《电光与控制》2012年第4期43-46,共4页Electronics Optics & Control

基　　金：国家自然基金(60879024)

摘　　要：针对航空电子波分复用网络消息的实时性要求,对航空电子网络的结构进行了研究,分析了在该网络中造成消息延迟的主要因素为转发延迟。进而对航空电子网络建模,根据WDM网络的资源特性进行拓扑的约束,提出了基于综合考虑虚拓扑跳数以及消息的带宽保证为目标的线性规划算法,在此基础上给出了大型网络的一个启发式算法,采用该线性规划算法对NSFNet网络拓扑进行了仿真验证。仿真结果表明,综合考虑虚拓扑跳数和消息带宽能减少消息的延迟,保证了网络实时性。Avionics WDM（ Wavelength Division Multiplexing） network requires real-time transmission. By analyzing the structure of avionics WDM network, we found that the main cause of message delay was the retransmission delay. Then a model of avionics network was built up, and the topology restraint was given based on resources characteristics. Furthermore a linear programming algorithm of virtual topology was proposed, which took hops quantity and bandwidth of messages into consideration to ensure real-time transmission. Based on this algorithm, a heuristic algorithm for large networks was also proposed. The method was used to simulate the NSF network, and the result showed that considering both the number of hops of virtual topology and bandwidth of messages can reduce the message delay, and thus ensure the real-time performance of the network.

关 键 词：航空电子WDM网络 虚拓扑 跳数 带宽保证 

分 类 号：V271.4[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]