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在WDM网络中,路由和波长分配(RWA)算法是一个焦点问题。当前的RWA算法多是考虑路径跳数或全网拥塞程度,并没有分析各个链路的具体情况。文中提出一种WDM网络中能实现负载平衡的路由算法──最大波长跳数比值(MWHR)算法,基本思想是:根据各备选路径的跳数和其经过的各链路上的可用波长数信息,计算该路径的优先选取权值,优先选取权值最大的路径。仿真表明,该算法在保证较低的阻塞率情况下,能有效的将业务负载均衡分布在网络中的所有链路上。
Routing and wavelength assignment (RWA) algorithms are a focal issue in WDM networks. The current RWA algorithm mostly considers the number of path hops or the congestion of the entire network, and does not analyze the specific conditions of each link. In this paper, we propose a routing algorithm that can achieve load balancing in WDM networks ─ ─ maximum wavelength hopping ratio (MWHR) algorithm, the basic idea is: according to the number of hops and the number of available wavelengths on each link Information, calculate the priority of this path, and select the path with the highest weight. The simulation results show that the proposed algorithm can effectively distribute traffic load evenly across all links in the network while ensuring a low blocking rate.