:
A serious problem in Wireless Sensor Networks (WSNs) is to attain high-energy efficiency as battery powers a node, which has limited stored energy. They can’t be suitably replaced or recharged. Appearance of renewable energy harvesting techniques and their combination with sensors gives Energy Harvesting Wireless Sensor Networks (EH-WSNs). Therefore, the area shifts from energy preservation to reliability of the network. For reliability, Coverage and Connectivity are important Quality of Service (QoS) parameters. Many sensor node scheduling heuristics have been developed in past. Some of them focus on more than single order of Coverage and Connectivity. If reliability is main concern for a WSN, then definitely there is a need to incorporate Q-Coverage and P-Connectivity in WSN. Lifetime of a WSN decreases while considering Q-Coverage and P-Connectivity. After some time network dies and it is of no use. Therefore, there is a trade-off between reliability and lifetime of a WSN. If EH-WSN is used, then lifetime of a WSN increases as well as Q-Coverage and P-Connectivity QoS parameters can used for achieving reliability. This paper proposes a sensor node scheduling heuristic for EH-WSN considering Q-Coverage and P-Connectivity. A comparison of a Q-Coverage and P-Connectivity sensor node scheduling heuristic when used between battery powered WSN & EH-WSN is done. Comparison shows that lifetime using EH-WSN is much greater as compared to battery powered WSN. This research is beneficial for real time WSN applications where EH-WSN provides power regularly without any intervention.
