Routing Protocol Optimization Algorithm For Low-power And Lossy Networks

With the development of new technology, such as sensor technology, communication information and network technology, the concept of the Internet of things has received more and more attention and favor, and it has been applied in lots of situations in our life. Low-power and Lossy Networks, as a main aspect to achieve the concept of the Internet of things program, has attracted the attention of scholars and experts around the world. Since the characteristics of low power, limitted node capacity, low power consumption, and abundant address resources, an efficient routing protocol is very important for the Low-power and Lossy Networks. RPL protocol as the international standard of this area, consists more comprehensive topology construction, route selection and optimization mechanism of the nodes in the network, establishing the basis for the settlement of the problem, but still much more challenges to be overcome, such as lack of optimization for parameters of routing process, unclaimed DODAG construction in irregular network topology situation.In this paper, the application background, development process, working mechanism and key mechanism of RPL protocol are introduced and analyzed in detail. Futhermore, a routing optimization algorithm based on triangular norm operator is proposed here to promote the node lifetime, which is limited due to the lack of energy consideration in the RPL routing process, so that achieved a balance of logical distance and node energy, reducing the energy consumption and improving the life-period. In addition, for the unclear node ownership when dividing the DODAG areas in irregular networks, a improved LEACH based DODAG region partition method is proposed, with sub-region partition of hexagon, cluster heads are uniformly generated around to improve balance of energy consumption in whole network, providing a reference for the application of RPL in irregular network. At the same time, a series of experiment are set to simulate the situations occurred in the paper and verify the conclusions, promoting the efficiency and wide- applicability of RPL.