关键词: 云计算, 铁路5G, 新一代铁路通信系统, IP分组交换, 网络功能虚拟化

Abstract: This paper analyzes the existing transmission network, data network, mobile communication network and other railway communication system architecture and shortcomings, points out that the railway communication system will evolve to the direction of service grouping, flat architecture, application virtualization, equipment generalization and centralized maintenance, and analyzes the networking scheme of the next generation railway communication system based on cloud computing, IP packet switching, software defined network, network function virtualization and network slicing technology in detail. The study of the evolution direction and overall architecture of the next generation railway communication system is of guiding significance to the development of railway communication in China.

Key words: cloud computing, railway 5G, next-generation railway communication system, IP packet switching, network functions virtualization