摘要
Web已经改变了一切。新的服务每天都在出现,并且有些服务一夜之间就能够获得巨大的用户量,导致网络中的使用方式和流量模式完全难以预测。过去所建立的基础设施难以适应这些新变化,为了满足这些需求,网络必须能够快速、自动、经济地适应新的变化。软件定义网络(SDN)和网络功能虚拟化(NFV)就是其中两个能灵活地使能上述需求的技术。本文描述了SDN在IP网络领域中所起的作用(包括在实现NFV方面的关键作用),并介绍了关于网络如何引入SDN和NFV的场景和多个使用案例,用于说明SDN和NFV如何使得网络更加敏捷、可编程、优化地支持业务和用户的特殊需求。
The Web has changed everything. New services appear daily, some gaining huge user bases seemingly overnight, making usage and traffic patterns completely unpredictable. The infrastructure of the past is not ready to accommodate this paradigm. In order to meet today＇s demands, the network must be capable of adapting quickly, automatically, and economically. Software defined networking （SDN） and network functions virtualization （NFV） are the technologies that will enable this flexibility. This paper describes the role that will be played by SDN in all areas of IP networking, including its role as a key enabler for NFV. Various scenarios of how SDN and NFV technology will be introduced into the network are described, and several use cases are presented to illustrate how SDN and NFV will make the network more agile, programmable, and optimized to meet the specific needs of applications and users.
出处
《电信科学》
北大核心
2014年第5期1-13,共13页
Telecommunications Science
