Enhanced routing algorithm based on depth traversal in software defined wireless sensor networks

Internet of Things (IoT) is being introduced in recent era at the networking field which carries the idea of connecting things together from personal hand-held devices to large household machines that are connected to the Internet. Many applications use the IoT implementation such as Wireless Sensor Network (WSN), which is an ad-hoc network that consists of smart sensors with limited computation and communication abilities. Sensor nodes are deployed in various environments for different applications to achieve the goal of collecting data and send it to a base station. The sensor nodes communicate with each other via routing protocols which must be a low power consuming protocols because of the sensor's limited energy, in order to prolong the network's lifetime a Software Defined Network (SDN) is used to control the WSN forming a network called Software Defined Wireless Sensor Network (SD-WSN), to achieve smooth network management, enhance network coverage, as well as solve the node's energy consumption problem. In this paper, we propose an enhanced routing protocol for SD-WSN in which the battery level is taken into consideration to choose the next node in the path from source to destination. The experiments revealed the improvement of SD-WSN network via reducing the energy depleted from sensor nodes, thus improving the reliability of the WSN.