ENERGY SAVING IN WIRELESS SENSOR NETWORKS : URBAN TRAFFIC MANAGEMENT APPLICATION

Since ten years, researches on the technology of wireless sensor network (WSN) in the field of urban traffic management succeed without proposing a reliable solution for all the constraints suffered. In this article, we study the scenario of using a wireless sensor network to control traffic lights an urban transport network and optimize its functioning by reducing the average waiting time of users and traffic fluidity. We are interested in a simple network at an intersection. Our study provides primarily, a study of the researches work that were done, and who are at the present time, in order to solve the number of communication problem between network of sensor node and the traffic light controller (each node collects data and sends them) with the consideration of energy consumption. it is termed the energy of communication. Note that the energy of communication represents the largest portion of the energy consumed by a sensor node. So, it is necessary minimize energy costs, because energy is a key constraint in sensor networks. For this, we have proposed an algorithm to reduce the number of packets sent by the sensor. The results of our simulations show that our algorithm is effective and practical.