大容量、智能化光传输系统：机遇、挑战与应对策略

大容量、智能化光传输系统：机遇、挑战与应对策略

冯振华1,2, 方瑜1,2, 施鹄1,2

（1. 中兴通讯股份有限公司，中国 深圳 518057；2. 移动网络和移动多媒体技术国家重点实验室，中国 深圳 518055）

摘要：分析了长距大容量、智能化光传输系统的五大关键技术：单波超400 Gbit/s、波段扩展、空分复用（SDM）、光层操作维护管理（OAM）和备用路径性能检测技术，并从学术研究、业界标准化动态等方面介绍了这些技术的进展。针对光传输系统技术发展趋势，从硬件、软件两个层面讨论了光通信的发展机遇和面临的挑战。基于中兴通讯光网络智能化平台框架，并结合中兴通讯在大容量、高速相干光通信方面的研究与产品开发工作实际，介绍了4个典型案例：灵活调制与光域均衡相结合来有效减少滤波代价、C+L波段扩展助力单波400 Gbit/s长距传输、高频光标签实现在线光性能监测、光探针和全局功率分析算法（GPA）确保备用路径快速可靠恢复。基于这些技术的产品化，中兴通讯将持续为客户创造价值，为用户提供更好的网络服务体验。  

关键词：大容量传输；扩展波段；光传输质量（QoT）；光域均衡；快速可靠恢复；光标签  

Towards Large Capacity and Intelligent Optical Transmission Systems: Opportunities, Challenges, and Solutions

FENG Zhenhua1,2, FANG Yu1,2, SHI Hu1,2

(1. ZTE Corporation, Shenzhen 518057, China; 2. State Key Laboratory of Mobile Network and Mobile Multimedia Technology, Shenzhen 518055, China)

Abstract: Five key technologies of long-distance, high-capacity, and intelligent optical transmission systems are analyzed including ultra-high-speed transmission beyond 400 Gbit/s per wave, waveband expansion, space division multiplexing (SDM), optical layer operation and maintenance management (OAM), and performance monitoring for idle paths. The progress of these technologies is also introduced from the aspects of academic research and industry standardization dynamics. According to the technology trends of the optical transmission systems, the development opportunities and challenges in terms of hardware and software are discussed. Based on the intelligent platform framework of ZTE Corporation and related research and development experience in the optical networks, four typical cases are presented including filtering penalty reduction enabled by flexible modulation and optical domain equalization, single wave 400 Gbit/s long-distance transmission together with C + L-band expansion, online optical performance monitoring realized by high-frequency optical label, fast and reliable optical restoration aided by the optical probe and global power analysis algorithm (GPA). With such kinds of novel techniques leading in, ZTE will continue to provide customers with improved value and a better network experience.   

Keywords: large-capacity transmission; waveband expansion; quality of optical transmission; optical domain equalization; fast and reliable optical restoration; optical label