Abderrahman Ben Khalifa was a visiting student from The Institut National des Sciences Appliquées de Lyon, (INSA Lyon) France, at the Networking Research Lab, in King Abdullah University of Science and Technology (KAUST), Saudi Arabia. Currently, Abderrahman is a Ph.D. student at the University of Waterloo, Canada. During his internship at the Networking Research Lab (NETLAB), he worked on the project titled "Perpetual Wireless Sensor Networks."