Optimal backoff sleep time based protocol for prolonged network life with blacklisting of failure-prone nodes in wireless sensor networks

摘要

Coverage and connectivity are the two important factors so far the energy efficient performance in wireless sensor networks is concerned. Although, wireless sensor network is one of the upcoming technologies in the field of wireless communication, we find very less development of real time applications using the sensor networks. The main reason for this is the design of the motes to be deployed in the sensor field according to the requirement of application is difficult job and expensive in terms of investment of money. Moreover, the replacement of the batteries or repairing of the devices becomes a very challenging task as the human intervention in the deployment areas is next to impossible. Hence assurance of long lived sensor nodes and prolonged network life time can be impacted by inducing adequate amount of sleep scheduling to the nodes. This paper presents a communication protocol based on optimal back-off sleep time to give a right amount of sleeping to the sensing devices in the monitoring area due to which energy efficient coverage can be achieved. The advantage of the design is that based on the unused battery, randomly the sleep duration is calculated and given to the probing node by the active node. Hence, full utilization of the active node till it dies is ensured. The life of an individual node thus increases since the time of activity of it is smartly scheduled. The blacklisting of nodes like to be faulty or fail helps to overcome problem of node failure. The simulation of the protocol, analysis of the results and further scope of the development of the proposed design is discussed.