BRAS SDN&NFV的演进思路

[摘要] 认为宽带远程接入服务器（BRAS）与软件定义网络（SDN）、网络功能虚拟化（NFV）技术的结合是未来网络演进的方向，是实现未来弹性网络的关键。提出了作为电信网络边缘核心的BRAS设备在SDN&NFV技术大潮下的具体的演进思路：BRAS与SDN&NFV技术的结合，采用控制与转发分离、软件与硬件解耦，实现弹性、可扩展、可编程的新型的宽带接入控制，为运营商提供灵活、高效、可靠的宽带接入服务。

[关键词] BRAS；宽带网络网关（BNG）；SDN；NFV

[Abstract] It is considered that the combination of broadband remote access server (BRAS) and software defined network (SDN) and network function virtualization (NFV) technology is the direction of the future network evolution, and is the key to realize the flexible network in the future. In this paper, we propose the evolution ideas of BRAS equipment in the SDN&NFV technology trend: combination of BRAS and SDN&NFV technology, separation of the control and forwarding, and decoupling of software and hardware. In this way, a new flexible, scalable and programmable broadband access control is realized, which can provide flexible, efficient and reliable broadband access to the operator.

[Keywords] BRAS; broadband network gateway(BNG); SDN; NFV