Network virtualization allows different service providers to dynamically establish concurrent but isolated heterogeneous vitual networks. This paper propose network vltualization that supports context-aware. Using allocation and control technology for virtualization network resources and dynamic resources, a mapping relationship is established between substrate resources and upper service. A transparent separation can also be introducced in the virtualization layer between application layer and substrate infrastructure layer, and cognitive management can be mplemented to dynamically control the virtualization network. In this way, the Internet can be greatly improved so that end to end OoS. security and manageability are met.%网络虚拟化可使得多个服务提供商动态组合多个异构的共存却相互隔离的虚拟网.文章提出一种支持上下文感知的网络虚拟化实现方法,通过虚拟化网络资源和动态资源分配与控制技术建立底层资源与上层服务之间的映射关系,通过虚拟化层在应用层和底层基础网络间形成透明的隔离,同时采用认知管理的方式对虚拟化网络进行动态控制,以改善和提升互联网能力,满足端对端服务质量、安全性、可管理性等需求.
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