大规模ASON中路由协议优化的研究

Routing protocol optimization in large-scale ASON networks

路由协议是自动交换光网络(ASON)控制平面的重要组成部分,其负责泛洪网络的链路状态信息,并进行路由计算。在ASON的实际运行过程中,路由协议存在一些不足,如占用大量数据通信网(DCN)带宽以及链路状态数据库同步时延过大等,这些问题对网络的可扩展性有较大影响。文章针对上述问题提出了路由协议的优化方案,包括为路由信息的泛洪设定阈值,以及给路由协议增加数据库自更新功能。

As an important part of ASON control plane, a routing protocol is responsible for link state advertisement and routing calculation. In the actual course of ASON operation, this protocol has some shortages that affect the network scalability, such as occupation of too much DCN bandwidth and excessive synchronization delay of link state database. This article presents an optimization scheme for the routing protocol, including setting a threshold for the flooding routing information and adding database self-updating function to the routing protocol.