A Modified Real-Time Fault-Tolerant Task Allocation Scheme for Wireless Sensor Networks
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A Modified Real-Time Fault-Tolerant Task Allocation Scheme for Wireless Sensor Networks

Francis Franklin Marshall, M B Mu'azu, I J Umoh, A T Salawudeen, B O Sadiq, D E Ikpe

Abstract

In WSNs, the sensor nodes are at risk of failure and malicious attacks (selective forwarding). This may have a profound negative effect when you consider real-time WSNs, making them challenging to deploy. When there is a delay in tasks allocation execution processes in real-time WSNs because of sensor nodes failures, this will cause disastrous consequences if the systems are safety-critical, e.g. aircraft, nuclear power plant, forest fire detection, battlefield monitoring, thus the need to developed a real-time system that is fault-tolerable. This paper developed a modified real-time fault-tolerant task allocation scheme (mRFTAS) for WSNs (wireless sensor networks), using active replication techniques. mRFTAS and RFTAS performance were compared using time of execution of the task, network lifetime and reliability cost. The mRFTAS performance showed an improvement over that of RFTAS when it comes to reducing the time it takes for task execution by 45.56% and reliability cost of 7.99% while prolonging the network lifetime by 36.35%.

Keywords

WSNs, Real-time, Fault-tolerant, Task Allocation.

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References

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