论文部分内容阅读
随着全业务网IP化的发展,承载传送网IP化已是大方向。PTN技术自提出后便获得了快速发展,并已成为本地、城域传送网IP化演进的主流技术之一,在现网中获得了大量的应用。在此重点阐述了PTN网络功能架构、多业务承载和数据转发功能、PTN网络保护、运行管理维护(OAM)架构和功能要求4个方面的内容。结合中国运营商和设备商的利益,文章对涉及PTN行标的技术选择、网络应用和后续发展的关键问题进行了探讨。
With the development of full service network IP, it is the general direction to bear the weight of transmission network IP. PTN technology has been rapidly developed since it was proposed and has become one of the mainstream technologies for the evolution of IP in local and metro transport networks and has gained a great deal of application in the existing network. This article focuses on four aspects of PTN network functional architecture, multi-service bearer and data forwarding functions, PTN network protection, operation management and maintenance (OAM) architecture and functional requirements. Combined with the interests of Chinese operators and equipment vendors, the article discusses the key issues concerning the technical selection, network application and subsequent development of PTNs.