Performance of RPL Protocol Based on New Objective Function for IOT-WSN
The development of routing protocol to manage energy consumption of wireless sensor devices is one of the active research areas. The main challenge is the resource constraint (e.g. energy). In Internet of Things (IoT), the devices operate in the presence of these limitations. Thus, an energy-efficient routing protocol is required. Routing Protocol for Low-Power and Lossy Network (RPL) is already introduced to enable IoT over Wireless Sensor Network. In this paper, a modified routing protocol depending on the maximum number of parent objective function (MNP-OF) is proposed. MNP-OF uses a new node metric called Neighboring-metric (N-metric). The proposed protocol is called MNP based on Remaining Energy (MRE) that combines N-metric with the node remaining energy metric for all nodes to the root node to select the preferred path. The results showed that MRE achieved up to 94% energy saving compared to RPL protocol in medium and large scale networks, while a reduction of about 33% in average remaining energy in small scale network. MRE showed considerable reductions in the average delay and the number of dead nodes combined with improvements in throughput, number of control messages, and number of switching parents for small scale network.