Expansion of CTRON interface for fault-tolerant system

Nonstop systems such as switching systems and gateway systems must be "Realtime-Fault-Tolerant", with high real-time capability and high availability. The CTRON interface has been specified for real time communication processing. This paper considers the CTRON specification's adaptability to fault tolerant systems from the following point of view, and then clarifies some problems: management of device status; detection of changes in device configuration; relationship between failed physical devices and logical devices. Finally the authors propose nine new functions (system calls) and asynchronous report interfaces (message boxes) to solve the problems.<
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