中文摘要：

提出了一种新的基于软件定义网络的多区域网络虚拟化模型。该模型引入了网络区域的逻辑概念，在同一个区域中使用某种网络虚拟化技术，在区域与区域的边界通过控制平面的统一控制实现不同虚拟网络标识符的转换，完成跨区域交互。该模型可以同时兼容多种网络虚拟化技术，实现高效率、可扩展、大规模的网络虚拟化。

英文摘要：

In this paper,we present a novel network virtualization model based on software-defined networking（SDN）.With the logic concept of network area,this model uses network virtualization technology in the same area and realizes the switch of different virtual network identifier between border regions by controlling the control plane in a unified way.In this way,it can complete the cross-regional interaction.This model is compatible with a variety of network virtualization technologies to achieve high efficiency,scalability,and large-scale network virtualization.