Research And Improvement Of Wireless Sensor Network Routing Protocols

Wireless sensor network (WSN) is a new technology which can satisfy various application needs, and it can make people's life and work radically change, therefore WSN is considered to be one of most influential new technology this century. The wireless communication technology, the sensor technology, the embedded computing technology and the distributed information processing technology are the cornerstone of wireless sensor network. Wireless sensor network technology is widely used in various fields such as military, medical care, disaster prevention, household life, etc. It has extreme high value for study and application.This paper mainly introduces the definition of wireless sensor network , the characteristic compared with the traditional networks, the application scope and domestic and foreign research status, and this paper expounds the wireless sensor network's structure, protocol stack and evaluation criterion of wireless sensor network performance quality, and this paper introduces the wireless sensor network routing protocols characteristic under the different application environment, and compares and analyzes the advantages and problems of several representative of the routing protocols which are designed according to the different application environment. Through the analysis of the advantages and disadvantages of LEACH and the advantage of adaptive data fusion, this paper puts forward a new routing protocols, which is named LEACH routing protocol based on adaptive data fusion (AF-LEACH). Without considering related redundancy of the data collected by the nodes in LEACH, and data fusion will be performed whether data correlation is big or small, but that may increase extra energy consumption and reduce the limited energy of sensor nodes. This article unifies the knowledge related data fusion and the advantage of adaptive data fusion and introduces the adaptive data fusion concept to the clustering routing protocols, comprehensively considering the energy consumption of data transmission and energy consumption of data fusion itself, make sense data migrate along the low energy consumption route, data fusion will be performed adaptively in sensor nodes, reduce the network energy, make the sensor networks efficiently use the limited energy resources, and to prolong the network lifetime of wireless sensor network.Finally, we use NS-2 simulation tools to have a Simulation experiment, and to simulate the operation conditions of the AF-LEACH and typical clustering routing protocols, analyze and compare the network lifetime and the network total energy consumption of these protocol. The simulation results show that AF-LEACH effectively saves network energy consumption and prolongs the network lifetime.