Research on directed diffusion routing protocol in wireless sensor networks

In order to bring the potential advantages of directed diffusion routing into full play in wireless sensor networks, the traditional MHR protocol was improved, and the MLN protocol was presented. By decreasing the gradient level width of directed diffusion gradient field, the connectivity of network would be enhanced, so that the reliability of data aggregation would be improved. At the same time, by changing the data-packet forwarding rule of hop-by-hop in MHR networks to the rule of lowest-hop-forwarding in MLN networks, the real-time performance and energy efficiency of data aggregation would be improved on the premise of high data aggregating reliability. The theoretical analysis and simulation results validated that the MLN protocol would not only enhance the connectivity but also improve the comprehensive performances of the directed diffusion routing protocol greatly in wireless sensor networks.