传输技术在城市轨道交通上层综合通信网络中的应用研究

Transmission Technology Application in Upper-Layer Integrated Communication Network of Urban Rail Transit

随着城市轨道交通的快速发展,地铁线路日趋增加,单一线路的业务功能已然满足不了跨线专业的互联互通和资源共享的需求,故建立上层光传输网络是必然趋势。基于上层综合通信网络的设计原则,上层光传输网络的组网设计不仅要兼顾网络稳定性,还要有足够的带宽容量以满足城市轨道交通上层综合网络的资源需求。通过传输技术比选,从物理拓扑设计、硬件设备选型、软件管理三方面深入分析,最后提出了应用OTN技术的上层光传输网络的可行性设计方案。

With the rapid development of urban rail transit, the metro line is daily increased, and the service function of single line now fails to meet the requirements for interconnection, interworking and resource sharing. So, it is inperative to establish the upper-layer optical transmission network. Based on the design principle of upper-layer integrated communication network, the networking design of upper-layer optical transmission network should consider the both aspects of network stability and enough bandwidth capacity to satisfy the source demand of upper-layer integrated network of Nanjing rail transit. Finally, the feasibility design scheme of upper-layer optical transmission network in application of OTN technology is proposed, via the comparison of the transmission technology and based on the in-depth analysis of three aspects including physical topology design, hardware device selection and software management.