以OSU为核心的M-OTN技术创新与验证  

OSU based M-OTN technology innovation and verification

作　　者：荆瑞泉[1] 霍晓莉[1] 李俊杰 丁一 JING Ruiquan;HUO Xiaoli;LI Junjie;DING Yi(Research Institute of China Telecom Co.,Ltd.,Beijing 102209,China;China Telecom Group Co.,Ltd.,Beijing 100032,China)

机构地区：[1]中国电信股份有限公司研究院,北京102209 [2]中国电信集团有限公司,北京100032

出　　处：《电信科学》2021年第4期116-124,共9页Telecommunications Science

摘　　要：随着运营商停止对SDH/MSTP网络的投资,OTN将逐步替代SDH网络并向城域网的边缘延伸,从而对OTN技术提出了新的需求。针对城域光传送网发展面临的挑战和新的业务需求,提出了以OSU为核心、面向城域优化的M-OTN技术体系。对OSU技术的标准化进展情况进行了介绍,并重点对OSU技术标准的主要内容进行了概要介绍,包括OSU帧结构和开销、OSU管理帧、无损带宽调整机制等。给出了关于M-OTN设备形态和现网演进策略的考虑。对主流厂商的M-OTN样机进行了测试,测试结果表明OSU技术在时延、带宽调整和承载效率等方面具有显著的优势。As many carriers are stopping SDH/MSTP investment,OTN networks will replace SDH networks gradually and extend to the edge of the metro network,thus introducing new requirements for OTN technologies.In view of the challenges and new services requirements of the development of the metro optical transport network,the M-OTN technology with the optical service unit(OSU)as the core and optimized for the metro application was proposed.The progress of standardization and main contents of OSU technical standards were introduced,including OSU frame structure and overheads,OSU management frames,OSU hitless bandwidth adjustment mechanism.The consideration on M-OTN equipment types and existing network evolution strategy was given.The M-OTN prototype systems from mainstream manufacturers were tested.Test results show that OSU technology has significant advantages in latency,hitless bandwidth adjustment and transport efficiency.

关 键 词：M-OTN 光业务单元 无损带宽调整 

分 类 号：TN914[电子电信—通信与信息系统]