基于SDN/NFV的新型IP城域网架构及演进

摘要

分析了运营商传统IP城域网自身架构、网络运维和业务运营等面临的挑战和问题，分析了当前业内vBNG技术方案，提出了基于SDN/NFV的新型IP城域网架构，并分析了该架构具有的五大特征，然后分别从转发层面、控制层面、网络业务编排和能力开放及业务层面给出了向新型IP城域网架构的演进策略。%It firstly analyzes the chal enges and problems in traditional broadband IP MAN on architecture,network operation and mainte-nance,business operations,etc. Then it analyzes the model of vBNG,proposes a new MAN network architecture based on SDN/NFV,analyzes the five features of the architecture. And then gives the evolvement strategy to the new IP MAN architec-ture from the forwarding level,the control level,the network service orchestration and the service level respectively.