A Study And Application Of Energy -saving Rooting In Wireless Sensor Network

In recent years, with the development of the modern sensor technology, embedded computing, microelectronics and wireless communications. Wireless sensor networks (Wireless Sensor Network called WSN) as a new information acquisition, processing and collection technology is gradually maturing, and it has the characters of low power consumption, low cost, distributed and self-organization and so on. WSN has been able to in many areas such as military defense, industrial, agricultural, environmental monitoring. However, wireless sensor networks still have a number of issues to be resolved, in particular energy-efficient wireless sensor network routing design problems.Firstly, the article introduced the theory of wireless sensor networks, which give a detailed analysis of the wireless sensor network architecture, network characteristics and status of such research. Then, researched some important wireless sensor network routing algorithm, finally make a detail comparison and research about wireless sensor network routing algorithm.Researched the LEACH routing protocol deeply, give the best choice of the cluster of the networks, proposed two energy-saving improvements rooting protocol which based on LEACH protocol:A clustering algorithm is proposed based on genetic algorithm (LEACH-IGA). LEACH-IGA algorithm steps: Consider the remaining energy of the total network. Choose the cluster heads joined a set, which the energy is beyond the average the network nodes; choose the best cluster head through genetic algorithm in the set; then divided the network some clustering regions according to the cluster.Based on the LEACH-IGA algorithm, through start local optimization of cluster head, LEACH-IGA-I algorithm is proposed. LEACH-IGA-I steps: using the result of LEACH-IGA, find the best local optimal cluster head in every cluster; complete the second choice of the cluster head. Cluster nodes communicate directly with the cluster head, while cluster head communicate directly or in directly with the sink node. According to the simulation, LEACH-IGA algorithm and LEACH-IGA-I algorithm have a good performance, extended the lifetime of network.A new Data Acquisition System is used in forest fire prevention system based on wireless sensor network, the improved energy-saving protocol is used in forest fire prevention system, which can collect and data the forest ecosystem (temperature, humidity, light intensity, wind speed, wind direction, etc.) transmission and real-time acquisition, the performance of protocol LEACH-IGA-I is tested by practice.This thesis is supported by NSF of Chongqing of China,the Rooting LEACH‐IGA‐Ihas been used in the project, now the project has been successfully completed in January 2011...