基于QoS的下一代网络的研究

Research on the QoS Based on Next Generation Network

随着下一代网络的发展,QoS保障成为下一代网络的一个重要课题。下一代网络的核心是软交换网络,而IP网将是软交换网络的承载网,所以,保障下一代网络的QoS可以从IP网、接入网、接入设备分别入手。文章首先在分析了下一代网络的新特征和一般模型的基础上,重点论述了作为下一代网络承载网的IP网的端到端QoS的保障方法:MPLS与IntServ和DiffServ相结合保障端到端QoS的技术,IntServ与DiffServ结合保障端到端QoS的技术。最后文章对接入网(FTTB+LAN接入时)和接入设备(媒体网关,IAD)如何提供QoS也进行了综述。

As next generation network develops intensively, guaranteeing the QoS of next generation network(NGN) is becoming increasingly important. The soft-switched network is the key of NGN, the soft-switched network bases on IP network. So research on the QoS of NGN can divide into three aspects, IP network,access network,access device. Based on the layered architecture and characteristics of NGN, this paper proposes the methods of guaranteeing end-to-end IP-QoS, the combination technique of MPLS and IntServ,MPLS and DiffServ,IntServ and DiffServ. Meanwhile the QoS of access network and access device are also discussed.