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光突发交换技术是最具发展潜力的光交换技术之一,而减少突发丢失是其首要问题。传统的静态路由机制不能随着网络负载的变化而更改路由,不能有效应对动态业务。为此,在研究现有动态负载平衡路由机制的基础上,提出了一种基于蚁群探测的路由机制。蚁群根据节点出度链路上的负载变化选择下一跳节点,当转发到目的节点时收集蚁群探测到的所有备选路径,然后根据备选路径中记录的链路负载选择可使丢包最小的路径,通过选择更加合理的路由,达到减少突发丢失率的目的。仿真结果表明,与其他算法相比,所提出的机制表现出比较好的性能,有效降低至少15%突发丢失率。
Optical burst switching technology is one of the most promising optical switching technologies, and reducing the burst loss is its primary issue. The traditional static routing mechanism can not change the route as the network load changes, and can not effectively deal with the dynamic service. Therefore, on the basis of studying the existing dynamic load balancing routing mechanism, a routing mechanism based on ant colony probing is proposed. The ant colony chooses the next-hop node according to the change of load on the node out-going link, collects all candidate routes detected by the ant colony when forwarding to the destination node, and then chooses to drop according to the link load recorded in the alternative route Packet minimum path, by selecting a more reasonable route, to achieve the purpose of reducing the burst loss rate. Simulation results show that compared with other algorithms, the proposed mechanism shows better performance and effectively reduces the burst loss rate of at least 15%.