城域数据网vBRAS建设方案研究

Research on the Construction Scheme of Metropolitan Area Data Network vBRAS

随着城域数据网接入业务类型的不断增加,如宽带、语音、视频与多媒体等,接入业务的规模呈现几何式增长,城域网业务控制点BRAS设备管理会话连接数量也大幅增加。BRAS控制面和转发面紧紧耦合,性能处理上互相影响,且管理维护复杂,采用人工分布式实施控制,工作量可观。当前,城域数据网BRAS组网架构正慢慢向v BRAS转控分离方向发展,vBRAS技术架构也已逐步开始试点应用和局部应用,通过在转控分离架构中应用NFV和SDN技术,可实现网络的虚拟化和软件化。vBRAS已成为城域数据网发展的趋势。

With the increasing diversity of traffic types in metropolitan area data networks,such as broadband,voice,video,multimedia,and so on,the size of the access service is also growing geometrically.The number of BRAS device management session connections in the service control point of the metropolitan area network has been greatly increased,the BRAS control surface and the forwarding face are tightly coupled,and the performance is tightly coupled.Processing is interrelated,management and maintenance are complex at the same time,control needs manual distributed processing,and the workload is considerable.Therefore,the network frame structure of BRAS group of metropolitan area data network develops to the direction of v BRAS transfer,and the vBRAS technology architecture is gradually starting the pilot and local application.NFV and SDN technology are used in the transfer control separation architecture to realize the virtualization and software of the network.VBRAS has become the trend of the evolution of the future metropolitan data network.