PTN技术与IP化移动回传网  

PTN and IP-Based Mobile Backhaul

作　　者：丛凯[1] 赵福川[1] 

机构地区：[1]中兴通讯股份有限公司,广东深圳518057

出　　处：《中兴通讯技术》2010年第3期31-34,46,共5页ZTE Technology Journal

摘　　要：融合了分组技术及同步数字体系(SDH)技术优势的分组传送网(PTN)技术以分组交换为核心,先天具备高效统计复用能力,更适应分组业务的高效传输。同时其类似SDH的强大运行维护管理(OAM)及电信级保护能力保障了移动回传业务的高效管理及传输质量。基于多协议标签交换传送应用(MPLS-TP)技术的分组传送网在多协议标记交换(MPLS)体系基础上去除了倒数第二跳(PHP)、标签合并及等价多路径(ECMP)等无连接特性,并在OAM、保护及同步技术方面做了相应增强,更适合承载IP化后的移动回传业务及大客户业务。PTN与原有多业务传送平台(MSTP)、城域以太网及IPoverWDM/OTN网络有机配合,合理分工,将共同服务于全IP时代的电信业务。Packet Transport Network（PTN） integrates the advantages of packet technology and TDM technology.Taking the packet switch as its core,PTN has a high statistical multiplexing ability,which allows it to become a more efficient packet transfer service.Its strong Operation Administration and Maintenance（OAM）—similar to SDH and carrier-class security protection services—ensure efficient mobile backhaul business management and transmission quality.MPLS Transport Profile-based（MPLS-TP） packet transport network eliminates its connectionless features（such as Penultimate Hop Popping（PHP）,label merge,and Equal-cost multi-path（ECMP））,and is enhanced in terms of OAM,protection,and synchronization.This is ideally suitable for carrying IP-based mobile backhaul services and key account services.PTN,and the original Multi-Service Transport Platform（MSTP）,Metro Ethernet,and the IP over WDM/OTN network of organic complexes,contribute to an ＂all IP＂ era of telecommunications services.

关 键 词：分组传送网 统计复用 端到端伪线仿真 服务质量 时间同步 

分 类 号：TN929.5[电子电信—通信与信息系统]