Research And Improvement On Geographic Routing Protocol In Wireless Sensor Network For Energy Balance

Wireless sensor network(WSN), which is the integration of micro-sensors, embedded computing, modern networks and wireless communication technologies, is a novel computing model and promote the development of science and technology and social progress. Through the real-time collaboration of the integrated micro-sensors, it can be used for sensing and processing information, and then can provide a large amount of reliable information. It has broad application prospects not only in military applications, environmental monitoring but also in disaster rescue, space exploration and so on.Routing protocol is a mechanism which transmits the data from the source nodes to the destination nodes. In wireless sensor network, the energy of the node is limited and hardly to recharge, so the foremost goal of the routing protocol design is to reduce the energy consumption and extend the lifetime. After the analysis of GPSR which is a typical routing protocol, a new improved algorithm witch called EA-GPSR has been proposed.In this thesis, the main research work and creative achievements are given as following:(1)To overcome the "hot node" problem, EA-GPSR algorithm considers the energy of the node and divides it into three energy level, then chose the next-hop node from high-level nodes set. In this way, nodes’energy will be consumed balanced and the lifetime of network will be prolonged.(2) The new algorithm adds the deviation angle consideration into nest-hop node chosen step and proposes relative distance factor to measure distance metric. Finally, EA-GPSR combines deviation angle and relative distance factor and get next-hop node chosen probability function to choose next-hop node, this method decreases the energy consumption in data transition.(3) To overcome the routing hole problem, new algorithm increase the node transition range into1.5R. It has been proved that this way combines with node energy level deviation step can make data-packet pass through routing hole successfully and keep the status quo of the routing hole.The simulation results show that the improved protocols and algorithms are superior to the original protocols and algorithms in some ways.For the purpose of certify the superiority of the research of blast furnace top pressure modeling and control in the article, it cited28figures,7charts and63references in total.