ALTERNATING SENSING PROCESS TO PROLONG THE LIFETIME OF WIRELESS SENSOR NETWORKS

摘要

In the last few decades, the usage of Wireless Sensor Networks (WSNs) is dramatically increased due to the nature of this type of networks where the nodes are randomly deployed in a large area to sense some attributes which the human beings cannot do so and send the data to the main device called Base Station (BS), and this process takes a time interval called round. The deployed nodes may be located near to each other and then they may sense approximately the same events. The process of sensing and sending the same data to the BS consumes a lot of energy in the nearby nodes and they will die fast. An alternating sensing process is proposed. The goal of the proposed mechanism is to prolong the lifetime of the network by increasing the lifetime of the nearby nodes and reducing the consumed energy in them. This goal is achieved by scheduling the sensing process to reduce the consumed energy as much as possible. The MATLAB tool is used to evaluate the proposed mechanism and compare it with the LEACH protocol. The results show that the proposed mechanism outperforms the LEACH protocol in terms of the network lifetime and the number of transmitted packets to the BS by approximately 9% and 17% alternatively.