关键词: 城市轨道交通, 云平台, 云边协同, 边缘计算

Abstract: Although a variety of cloud-edge collaboration solutions have been gradually implemented in the field of urban rail transit, most projects that have gone online still have such problems as low resource utilization and excess basic performance. To solve these problems, this paper proposes the optimized design idea of constructing a cloud platform for multi-node line network with a two-tier flat architecture consisting of a central layer and a line layer, to eliminate the division of work between the central layer and the line layer. Thus, the central layer takes charge of the dispatching and commanding of the line network, the collection of and service for subway data assets, as well as the basic support for intelligent applications at the network level. Meanwhile, the line layer breaks the barriers among various lines, builds edge nodes around transfer stations, provides basic resources for service systems of these lines, and meets the real-time service operation needs at the line side. The two-layer architecture design achieves the separation of network and line services. It also improves the real-time response capability of the cloud architecture, and greatly reduces the construction scale of the network data center.

Key words: urban rail transit, cloud platform, cloud-edge collaboration, edge computing