scholarly journals Effect of redundancy on mean time to failure of wireless sensor networks

Author(s):  
A.P. Speer ◽  
I.-R. Chen
Author(s):  
Gholamreza Kakamanshadi ◽  
Savita Gupta ◽  
Sukhwinder Singh

Introduction: Fault tolerance is an important issue for assuring data reliability, energy saving and prolonging the lifetime of wireless sensor networks. Since, sensor node, relay node, etc. are prone to failure, there is a need an effective fault tolerance mechanism. Method: Relay nodes have used as cluster heads and the concept of two disjoint paths has used for proving fault tolerance against link failure. To evaluate the Fault Tolerance Level, Mean Time to Failure and subsequently Failure Rate has calculated, that reflect the reliability of the network. Results: The results show that as the area size of the network increases, the average Fault Tolerance Level of the network almost becomes constant. Furthermore, when the Mean Time to Failure of the network decreases then the Failure Rate increases. It means the overall reliability of the network with smaller network size is more than the larger network size. Conclusion: This analysis helps the network designers to decide the quantity of deployment of relay nodes with respect to fault tolerance level. It also, may help to prevent relay nodes failure as to take appropriate action so as to increase the fault tolerance level of the network as well as network reliability. Discussion: This paper presents a detailed analysis of relay nodes failure under distinct network configurations in heterogeneous wireless sensor networks.


Wireless Sensor Networks (WSNs) are deployed generally in a hostile environment, where an adversary captures some nodes that are physically connected in the network. It initially reprograms the nodes and makes them replicate into a number of clones, thereby having control over them. In order to provide a distributed solution to resolve the above specified problem specified above, a framework based on Authentic Node Placement based Message Verification and Passing Strategy (ANP-MVPS) is proposed. Some of the solutions offered by existing techniques are not satisfactory due to Energy and Memory constraints. This turns to be a serious drawback for protocols used in WSN’s resource constrained environment. In this work, three diverse factors are considered for investigation. They are: Firstly, modeling of Authentic Node Placement based Message Verification and Passing Strategy (ANP-MVPS) is performed to identify the distributed mechanism of clone in a network and prevent the replication of clone among them. Secondly, the parameter selection Probability of Occurrence of IP, Mean Time Intervals, Time to Live, ACK value, Time Stamp Field, SYN value, Differentiated Service Field and Sequence Number are considered before performing classification. Thirdly, an efficient Naive Bayesian classifier for security analysis based on trust value (NB-TV) is used to estimate the performance metrics like accuracy, sensitivity, specificity, F-measure, Recall etc. This method shows satisfactory results when compared to existing techniques. The simulation was carried out in MATLAB environment. The proposed method shows better trade off in contrast to prevailing techniques.


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