Role Management and Presence as a Mission Critical Service in Railway Communications

The future of the railway transport depends on critical reliable mobile broadband connectivity to increase operational efficiency, to keep network security and data integrity, and to enhance customer experience. Future Railway Mobile Communication System (FRMCS) is defined to provide innovative mission critical services for people, trains, video monitors, and sensors. FRMCS standard defines user requirements and system logical architecture. The next step in the process of FRMCS standardization is to define building blocks and interfaces for application layer. In this paper, a new RESTful Application Programming Interface (API) is described, which enables access to functionality of FRMCS equipment, user, and their functional identities registration. The API is aligned with the standards and may be used by different railway applications enabling interoperability. The API is described by typical use cases, supported resources, data types and operations. Models, which reflect the application's and FRMCS system's view on the identity registration status, are developed, formally described, and theoretically verified.