RPL-Based Adaptive Multi-metric Routing Mechanism

Due to the rapid development of communication technology and embedded technology, tiny electronic devices can be embedded with diversified functions such as precision sense, calculation, and communication for use in environments that are difficult to monitor around life. However, wireless sensors are hardware with limited energy and memory performance. In order to operate in limited resources, its transmission method is extremely important. Therefore, RPL (IPv6 Routing Protocol for Low Power and Lossy Networks) is designed to provide routing protocols for devices with limited resources. However, the traditional RPL routing mechanism considers a single metric, which leads to a reduction in the energy of a specific node and gradually cannot meet the needs of users. Therefore, this paper proposes an adaptive multi-metric routing mechanism that considers Expected Transmission Count, Energy Consumption, and Hop Count to extend network lifetime. Simulation results show that the proposed method can effectively prolong the network lifetime by 15.91%, maintain a packet delivery ratio of more than 99%, and reduce the total delay by 6.6% compared with the traditional method.