基于超图模型的多域ASON损伤感知组播路由算法

如何在缺乏全局信息的条件下构建安全可靠的组 播树,是智能光网络分域管理后引入的一个新问 题。针对此问题,通过建立新型的多域智能光网络超图模型,在考虑物理或攻击损伤的约束 条件下,利用 基于超路径的域间超树构建方法,结合K最短路径策略,提出了 一种基于超图模型的多域ASON损伤感知 组播路由算法,并进行了实例分析。本文算法在完成多域组播路由建立与波长分配的同时, 具有较低的时间复杂度。通过测量K值、组播规 模、波长数量及分配策略、域数量对网络平均连接阻塞率的影响,实验结果表明,本文算法 是有效的且取得了较好的阻塞性能,同时建议多域ASON组播规模大小应与域的数量保持一 定的比例均衡。

An impairment-aware multicast routing algorithm based on hypergraph model in multi-domain ASON

In order to solve the multicast tree establishment problem for multi -domain ASON,an impairment-aware multicast routing algorithm based on hypergraph model is pres ented.In the presented algorithm,a new multi-domain hypergraph model is firstly proposed.In conside ration of the constraints of physical or attack impairments,the strategy of K paths a nd the method of the establishing inter-domain hyper-tree based on hyper-path are used respectively.Meanwhile,an example a nalysis was carried out.This algorithm not only finish the multi-domain multica st routing and wavelength assignment, but also has the lower time complexity. The experimental results show that the proposed multicast routing algorithm i s effective and can achieve good average blocking performance by measuring the effect of the K value,the multicast size,the wavelength number and distribution strategy,and the number of domains on the network average bloc king probability.At the same time,the actual multi-domain multicast size should be proportional to the numb er of the domains which is also suggested.