基于NFV与SDN的未来接入网虚拟化关键技术

Virtualization of Access Network in Future RAN Based on NFV and SDN

面对未来移动通信网络中服务需求与成本矛盾带来的压力,集中式接入网是解决上述问题的有效途径。虚拟化技术是实现集中式接入网应用、提升集中式接入网性能的关键。文章阐述计算机领域与移动通信领域的虚拟化技术,给出未来移动通信领域虚拟化技术的分类与需求,基于网络功能虚拟化与软件定义网络,分析集中式接入网架构中的虚拟化技术,从资源共享隔离、覆盖与承载分离的灵活功能配置以及虚拟化技术验证平台等方面,对基于NFV与SDN的集中式接入网虚拟化进行探讨。

The centralized access network architecture is the effective solution to solve the problems coming from the contradiction between the cost and the service demands in the future mobile network. Virtualization is one of the key techniques to help realize the centralized access networks and improve the performance. This paper discusses the virtualization technique in both computing and mobile communication fileds. On the basis of the discussion, the centralized access network architecture virtualization technologies based on Network Function Virtualization（NFV） and Software-Defined Network（SDN） techniques are designed and analyzed. The key technologies are studied including resource sharing and isolation, separation of the control and data transmission, as well as the virtulization testbed.