摘要
传送网承载的业务从以时分复用(TDM)为主向以IP为主转变,需要一种能够有效传送分组业务的新技术。传送多协议标记交换(MPLS-TP)作为一种面向连接的分组传送技术,具有高效的多业务适配能力和灵活的标签转发机制。从MPLS-TP技术特性入手,文章基于MPLS-TP标准化的最新进展,重点讨论了与MPLS-TP有关的数据转发平面,以及业务适配和标签转发机制等关键技术,包括信号适配、分组交换与转发和双标签信令传送实现等内容,说明了基于双标签传送模式的虚拟专用网的业务实现方法,并总结了MPLS-TP的应用情况。
Telecommunications services have been trending away from Time-division Multiplexing（TDM）-based transport networks towards IP-based ones.In the future,a new technology that can effectively carry packet services will be urgently needed.MPLS Transport Profile（MPLS-TP） is a connection-oriented packet transport technology with efficient service adaptation capabilities and a flexible label forwarding mechanism.This paper analyzes the technical characteristics of MPLS-TP,and introduces the latest standardization process.It discusses some key issues for MPLS-TP（including data forwarding plane,service adaptation,and label forwarding mechanism） and explains the implementation of dual-label transfer mode in Virtual Private Network（VPN）.Finally,this paper summarizes the application of MPLS-TP.
出处
《中兴通讯技术》
2010年第3期21-25,共5页
ZTE Technology Journal
基金
国家高技术研究发展计划"(863"计划)课题(2008AA01A328)
