Reliable Routing Protocol for Smart Grid Based on High-Reliability Objective Function

Smart Grid Communication Network (SGCN) is the core architecture of the smart grid. In large-scale network deployment and heavy load scenarios, many existing routing protocols still present low reliability and instability issues, which need to be optimized and improved. This paper studies a highly reliable routing protocol in the application scenario of the smart grid. Aiming at the network load balancing problem under heavy load, we propose a high-reliability objective function (OF-HR). Furthermore, we modify the sending timer of the DODAG Information Object (DIO) to achieve the reliability of the routing protocol at the expense of certain node energy consumption. The simulation results based on the Contiki system and Cooja tool show that the OF-HR proposed in this paper improves the packet delivery by up to 32.2% in the same network topology compared with the objective function in the mainstream algorithms. In the circumstance of 60–80 Packets / (Point * Minute), DIO sending interval is reduced to about 1 minute indicating that our algorithm has high stability and robustness under the heavy load of the smart grid.