Improvement And Simulation On Wireless Sensor Network Routing Protocol

This paper stems from the cooperative project of Doctor Foundation,"Research on self-adapt mechanism for routing protocol of WSN", and the Chongqing NSF project,"Research on optimal three-dimensional cover for WSN". Based on analysis and comparison upon application realm, advantages and disadvantages of routing protocols for WSN, this paper plans to study and improve DD routing protocol according to the project's acquirement (query-alert and low-power route), and then emulates the improved routing protocol using NS-2. With comparison and analysis of the emulating results, it represents the performance report of improved protocols, which will finally support the design implementation of routing protocol in the project.The main work and achievements of this paper are listed as follows:1. It provides a comprehensive background of the definition and catalogue of WSN and gives the main characteristics as well as the developing trend and future development.2. It represents the application realm plus advantages and disadvantages of routing protocol through the comparison and analysis, and will make an improvement on DD routing protocol according to the project's acquirement (query-alert and low-power router).3. With analysis and research on the routing mechanism of directed diffusion algorithm, we present the main problem of DD, which include the single-judge rule in the router-reinforcement stage and inefficient routing algorithm. So, we present a brand-new judging-rule (communication cost), and adopt Dynamic Programming Algorithm upon DD in order to achieve the best routing effect from the resource to the SINK node.4. With emulation of improved DD, we provide detailed analysis and discussion of emulation results, and finally give a proposal of routing protocol suited for projects.