The OMG’s Real-Time CORBA (RT-CORBA) and FaultTolerant CORBA (FT-CORBA) specifications make it possible for today’s CORBA implementations to exhibit either real-time or fault tolerance in isolation. While real-time requires a priori knowledge of the system’s temporal operation, fault tolerance necessarily deals with faults that occur unexpectedly, and with possibly unpredictable fault recovery ...

In this paper, we focus on automated addition of fault-tolerance to an existing fault-intolerant realtime program. We consider three levels of fault-tolerance, failsafe, nonmasking, and masking, based on the properties satisfied in the presence of faults. Furthermore, for failsafe and masking fault-tolerance, we introduce two cases, soft and hard, based on satisfaction of timing constraints in ...

While there has been signiicant advances in fault tolerance research, the eeort has focused on the design of individual fault-tolerant systems or methodologies. Recently, some research has been initiated to develop fault tolerance paradigms that can be used to provide a spectrum of fault tolerance levels. In this paper, we present the design of a fault tolerance framework that can be used to su...

This paper describes and illustrates the application of a strategy for testing fault tolerance by means of fault injection. The proposed approach encompasses a method for modelling fault tolerance together with a strategy for testing several classes of fault tolerance mechanisms. The modelling approach distinguishes two main abstraction levels: (i) a data flow diagram of the general organisatio...

Recently the component‐based approach has become a major trend in intelligent service robot development due to its reusability and productivity. The framework in a component‐based system should provide essential services for application components. However, to our knowledge the existing robot frameworks do not yet support fault tolerance service. Moreover, it is often be...

We present a new approach to algorithm based fault tolerance (ABFT) for High Performance Computing system. The Algorithm Based Fault Tolerance approach transforms a system that does not tolerate a specific type of faults, called the fault-intolerant system, to a system that provides a specific level of fault tolerance, namely recovery. We have implemented a systematic procedure for introducing ...

Action-level (AL) fault tolerance means to accomplish every critical action (output action of a critical task as speciied) successfully in spite of component failures. Therefore, it is aimed for the highest degree of fault tolerance in real-time computer systems. Several basic techniques developed in recent years for realizing action-level fault tolerance in real-time LAN (local area network)-b...

A Distributed Sensor Network (DSN) consists of a set of sensors that are interconnected by a communication network. DSN is capable of acquiring and processing signals, communicating, and performing simple computational tasks. Such sensors can detect and collect data concerning any sign of node failure, earthquakes, floods and even a terrorist attack. Energy efficiency and fault-tolerance networ...