Assurance system technologies based on autonomous decentralized system forlarge scale transport operation control system

A large-scale primarily public system requires in addition to high reliabil ity, a broad range of applications from control to information services. As construction is phased-in this system must be flexible, changeable and abl e to grows as the needs arise. However, a changing a system may lead to los s of reliability. A system that is able to change and grow in a reliable an d stable manner is called an assurance system and the technology it uses is called assurance technology. This paper describes the basic technology, ph ased-in system construction and so on of assurance technology based on an a utonomous decentralized system. It further discusses application of assuran ce technology to ATOS as an example of a large-scale transport operation co ntrol system. Note: ATOS; Autonomous Decentralized Transport Operation Cont rol System.