Abstract: With the gradual advancement of the efforts to develop China’s transport strength, higher requirements have been put forward for the IT transformation of urban rail transit laboratories. Based on the technical framework of cloud computing, this paper proposes a scheme of shared cloud platform for testing, and builds an innovative new-generation laboratory for urban rail transit signaling in cloud environment. Thanks to the application of the VLAN and routing based communication technologies, partial coupled linkage can be achieved among the public cloud, the private cloud and the laboratory area. However, due to the limits on communication links of the public cloud, communication cannot be achieved with other areas within different network segments. Thanks to the innovative application of the VXLAN technology and the establishment of the layer-two communication tunnel, the needs for communication within the same network segment are addressed, so that more test scenarios can be established. The resulting hybrid cloud platform expands the business scope of and supports the digital transformation and intelligentization of urban rail transit laboratories.

Key words: hybrid cloud, shared test platform, urban rail transit laboratory, signaling system, resource sharing, VXLAN

摘要： 建设交通强国的逐渐推进，对城轨实验室的信息化改造提出更高的要求。基于云计算的技术框架，提出共享测试云平台的方案，创新性地构建新一代的云环境城轨信号实验室。通过利用VLAN及路由的通信技术，可实现公有云、私有云及实验室区域间的部分耦合联动，然而公有云由于通信链路的限制，无法实现与其他区域不同网段的通信。创新性地引入VXLAN技术，通过搭建二层通信隧道，解决同网段通信的需求，从而支持更多测试场景的搭建。混合云平台的搭建拓展城轨实验室的业务范围，为持续推动实验室的数字化转型、智能化发展起到支撑作用。

关键词: 混合云, 共享测试平台, 城轨实验室, 信号系统, 资源共享, VXLAN