High-Level Reliability Evaluation of Reconfiguration-Based Fault Tolerance Techniques

2018 ◽  
Author(s):  
Tien Thanh Nguyen ◽  
Mathieu Thevenin ◽  
Anthony Mouraud ◽  
Gwenole Corre ◽  
Olivier Pasquier ◽  
...  
Keyword(s):  
Fault Tolerance ◽  
Reliability Evaluation ◽  
High Level

Effect of Different Connection Patterns of MUX and DEMUX on Terminal Reliability and Routing Scheme of Gamma-Minus MIN

2018 ◽  
Vol 25 (03) ◽  
pp. 1850013 ◽  
Author(s):  
Shilpa Gupta ◽  
G. L. Pahuja
Keyword(s):  
Fault Tolerance ◽  
Communication Systems ◽  
Interconnection Network ◽  
Low Cost ◽  
Reliability Evaluation ◽  
Performance Measure ◽  
Cost Ratio ◽  
Performance Indices ◽  
Network Topologies ◽  
Terminal Reliability

In parallel and distributed systems, multistage interconnection network (MIN) plays an important role for its efficient communication between processor and memory at a very low cost. A major class of MIN called Gamma network is known for its redundant network topology and is being used in broadband communication systems. The increased redundancy incorporation makes these networks more complex and hence reliability evaluation becomes complex. The performance evaluation of these network topologies requires reliability evaluation utilizing routing mechanism or techniques. In this paper, we have proposed four topologies of Gamma-Minus network using MUX and DEMUX. Terminal Reliability (TR), fault tolerance and routing schemes of Gamma-Minus network topologies proposed have been computed by utilizing different connection patterns of MUX/DEMUX. Also, performance indices such as TR, Reliability Cost Ratio (RCR), Fault Tolerance, etc. computed for different Gamma-Minus architectures have been compared with the existing Gamma networks, other than Gamma-Minus. All the performance indices for different Gamma-Minus topologies show improvement over the performance indices of different Gamma networks. The proposed Gamma-Minus architectures have been compared among themselves and also Gamma-Minus2 shows the best performance for all performance indices. To the best of our knowledge, most of the researchers have not compared fault tolerance and RCR performance measure.

A MULTI-STAGED SOFTWARE DESIGN APPROACH FOR FAULT TOLERANCE

1994 ◽  
Vol 01 (02) ◽  
pp. 197-218 ◽  
Author(s):  
DIMITER R. AVRESKY ◽  
PRADEEP K. TAPADIYA
Keyword(s):  
Fault Tolerance ◽  
Software Design ◽  
Fault Injection ◽  
Automatic Generation ◽  
Design Approach ◽  
Software System ◽  
Testing Strategy ◽  
Multi Stage ◽  
Hardware Failures ◽  
High Level

This paper presents a multi-stage software design approach for fault-tolerance. In the first stage, a formalism is introduced to represent the behavior of the system by means of a set of assertions. This formalism enables an execution tree (ET) to be generated where each path from the root to the leaf is, in fact, a well-defined formula. During the automatic generation of the execution tree, properties like completeness and consistency of the set of assertions can be verified and consequently design faults can be revealed. In the second stage, the testing strategy is based on a set of WDFs. This set represents the structural deterministic test for the model of the software system and provides a framework for the generation of a functional deterministic test for the code implementation of the model. This testing strategy can reveal the implementation faults in the program code. In the third stage, the fault-tolerance of the software system against hardware failures is improved in a way such that the design and implementation features obtained from the first two stages are preserved. The proposed approach provides a high level of user-transparency by employing object-oriented principles of data encapsulation and polymorphism. The reliability of the software system against hardware failures is also evaluated. A tool, named Software Fault-Injection Tool (SFIT), is developed to estimate the reliability of a software system.

An Agent-Based Fault Tolerance Mechanism for Dependable Medical Systems

2015 ◽  
Vol 6 (1) ◽  
pp. 47-75
Author(s):  
Meriem Zaiter ◽  
Salima Hacini ◽  
Zizette Boufaida
Keyword(s):  
Distributed Systems ◽  
Fault Tolerance ◽  
Medical Device ◽  
Home Monitoring ◽  
Medical System ◽  
Medical Systems ◽  
Tolerance Mechanism ◽  
Agent Based ◽  
High Level ◽  
Domestic Medical

The use of distributed systems and IT is growing, with automation being used more and more to facilitate our daily tasks. The need to remotely monitor a patient has driven one of important results of this growth: domestic medical systems. The latter are able to follow and maintain the condition of a patient in the patient's home. Monitoring is important in terms of saving time and also money. However, the critical nature of this task requires a high level of dependability. The aim of dependability is to satisfy the user's goal, which is that whatever the state and context of the overall system, its ability to control the operation of the medical device and to transmit files reporting the patient's condition (normal, critical, alert, etc.) must be continuously assured. This can be ensured by fault tolerance techniques. The authors' objective in this paper is to present a technique for fault tolerance in a domestic medical system. Briefly, their proposal integrates a smart concept into the system: agents for controlling the operation of the medical system and tolerating the faults that can occur.

Application of algorithm-based fault tolerance to high-level synthesis of signal flow graphs

1994 ◽  
Author(s):  
Tanay Karnik ◽  
Shankar Ramaswamy ◽  
Steve M. Kang ◽  
Prithviraj Banerjee
Keyword(s):  
Fault Tolerance ◽  
High Level Synthesis ◽  
Signal Flow ◽  
Signal Flow Graphs ◽  
High Level ◽  
Flow Graphs

Reliability Assessment for the Balanced Cantilever Construction Phases of Super Long-Span Cable-Stayed Bridges with Steel Box Girder

2014 ◽  
Vol 578-579 ◽  
pp. 1542-1550 ◽  
Author(s):  
Bing Bai ◽  
Qing Hua Zhang ◽  
Qiao Li
Keyword(s):  
Reliability Evaluation ◽  
Long Span ◽  
Stay Cables ◽  
Sample Structure ◽  
Sutong Bridge ◽  
The Stability ◽  
High Level ◽  
Cantilever Construction ◽  
Random Nature ◽  
Cable Stayed Bridges

Balanced cantilever construction phases are of great importance for the total life cycle processes of super long-span cable-stayed bridges. For assessment purpose, a systematic study on the reliability evaluation of these phases is carried out. Taking Sutong bridge as the sample structure studied, a series of load and resistance models are then established on the basis of field measurement. Using all these achievements, a typical phase of girder segment 6# lifting is chosen for reliability evaluation. Results of the analysis show that the established models are quite representative and reflect actual random nature perfectly. Furthermore, compared with pylon and stay cables the stiffening girder seems more likely to fail in accordance with reliability index. The major failure mode of it in terms of present analysis is the stability failure due to the action of bending and axial load. Nonetheless, the components on the whole are still in a high level of reliability, which can guarantee the proceeding of construction with efficiency.

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