分层路由——新一代智能光网络的路由技术  

Hierarchical RoutingRouting Technology for the Intelligent Optical Network

作　　者：刘爱波[1] 陆月明[1] 纪越峰[1] 

机构地区：[1]北京邮电大学光通信中心,北京100876

出　　处：《现代有线传输》2004年第2期65-69,共5页

基　　金：本文受国家自然科学基金(No.90104017);教育部科学技术研究重大项目(No.0215);跨世纪优秀人才培养计划基金资助

摘　　要：近几年数据业务正在持续快速地增长,为了满足日益增长的带宽需要和不断提高的服务质量要求,光网络正 朝着智能化的方向不断发展。智能光网络,特别是自动交换光网络(ASON)的提出代表了光网络的发展方 向,成为下一代光网络结构的研究焦点。为了提高网络的可扩展性和灵活性,满足ASON面向连接的网络特 性,ASON网络采用了分层路由技术,通过拓扑抽象将ASON网络的路由结构层次化,利用聚合的路由信息 简化选路过程。分层的路由结构使得运营商能够屏蔽网络的内部细节,提高网络的安全性,并且可以任意 配置网络内部结构,使整个光网络具有高度的灵活性和可扩展性。本文深入分析了ASON网络的分层路由体 系结构和分层路由对域间接口的功能要求,详细地介绍了适用于ASON分层路由的DDRP路由协议,并讨论了 基于DDRP的ASON分层路由的组网实现方案。Nowadays the data service is increasing explosively . In order to meet the need of more bandwidth and higher service quality , the optical network will grow more and more intelligent . The technology of Automatically Switched Optical Network (ASON) which is put forward recently presents the direction of optical network development., hence becomes the research focus of the next generation optical network architecture . Because of the connection-oriented character of ASON , the hierarchical routing technology is introduced to the ASON network for better scalability and flexibility. The routing procedure is simplified by topology abstraction and aggregate routing information . Through the hierarchical routing architecture, operators can shield the internal detail of their optical network and configure the network arbitrarily, which will improve the network security greatly and will guarantee better scalability and flexibility . In this paper , the architecture of ASON hierarchical routing is depicted deeply together with the requirement by hierarchical routing to the inter-domain interface . We also introduce the Domain to Domain Routing Protocol (DDRP) in detail that is fit for the ASON hierarchical routing . At last we discuss the networking scheme for ASON hierarchical routing based on DDRP .

关 键 词：分层路由 智能光网络 自动交换光网络 域间路由 DDRP 

分 类 号：TN929.11[电子电信—通信与信息系统]