层次式交换网络——未来Internet的一种新框架

1 背景新的应用需求和通讯技术的进步是驱动网络体系结构和网络协议发展的主要力量。自1995年开始,Internet数据流量以每年超过100％的速度增长,估计2002年,数据业务量将超过话音业务量,并在未来三年里将占总业务量的90％。同时,数据应用也从传统应用(电子邮件、文件传输、WWW等)向实时多媒体应用(IP电话、视频会议、VOD、交互游戏、虚拟现实、远程医疗和远程教育等)迅速发展,要求

Switched Hierarchical Network—a New Architecture for Future Internet

With the dramatic growth of the network scale and users, Internet is becoming a global information infrastructure. Driven by both new inventions in communications technologies and new applications, the architecture of Internet has evolved from the goals of openness and integration to those of high-performance, scalability and manageability. The paper first reviews the challenges faced in Internet and the existing solutions, and points out that the main reasons resulted in the bottleneck of core routers and the difficulties of QoS and performance guarantee rooted in the unstructured topologies and flat addresses structure of the Internet. The paper introduces the ideas of well-structured hierarchies into the topologies and address space of Internet, which takes advantages of the properties to construct the high-performance and scalable architecture for future Internet. In the end, we propose a model of switched hierarchical network which includes the extended topologies, critical protocols and control algorithms, and prove the correctness and feasibility of the model by network simulation experiments.