Abstract:
The emergence of the Heterogeneous Wireless Sensor Network (HWSN) attracts the attention of researchers in
recent years. In HWSN, the sensor nodes have different sensing, processing, storage, power, and communication
capabilities. Different protocols, algorithms, and applications have been proposed for HWSN. However, several
research challenges, for example, efficient utilization of node energy, transmission control, enhancing network lifetime,
optimum route selection, and minimizing the delay involved in processing still need to be addressed. The sensor nodes
are battery-powered and in most cases, it is impossible to replace the batteries. Hence, it is important to design energyefficient
solutions for HWSN. To improve energy efficiency and increase the lifetime of HWSN, we proposed a fogbased
energy-efficient solution called FEDR. The design of FEDR is based on the Dijkstra algorithm. The proposed
architecture was implemented in a simulation environment. We performed several experiments to evaluate the
performance of FEDR. We also compare our results in terms of alive nodes and energy utilization with two state-of-theart
solutions called FEAR and FECR. Experimental results showed that FEDR outperforms FEAR and FECR. From the
results, we conclude that our proposed solution improves the energy efficiency and lifetime of HWSN.