Research On Intelligent Home Wireless Sensor Network

In the few decades, electronic science and technology level are increasing day by day, people’s life and thinking habits are constantly changing, and they raise more bolder demands in life. Achieving security, environment monitoring, home control system integration of intelligent control for all families, is a pursuit of higher standard of living. Based on the Provincial science and technology division project "Support the traditional advantage industry upgrading of embedded software development and application of technology platform" that our lab has completed, this thesis puts forward the "Research on Intelligent Home Wireless Sensor Network", aimed at applying the key technology of wireless sensor network(WSN) to intelligent home. In this thesis, the innovation mainly includes two aspects: On one hand, by using embedded technology combined with wireless network protocol, it designs a wireless sensor network for intelligent home to monitor and control the home environment. On the other hand, the classical energy-saving routing protocol LEACH is improved, and is applied to the network model of the intelligent home network, thus the network is more energy-saving and the intelligent home life is greener and more energy-saving.Firstly this thesis raises the research background and meaning of the intelligent home network, and introduces the current status at home and abroad. Then it elaborates the general framework of the intelligent home system and the key points of constructing.Then it gives a design of the intelligent home network, introducing the system framework and the hardware and software design of the wireless sensor network based on Zig Bee protocol in detail. In the hardware part, general and module design of different kinds of Zig Bee devices, which are Coordinator, Router and End-Device, is elaborated. Embedded software of three kinds of Zig Bee devices and control center software design basing on Qt is introduced in the software part.Secondly based on the analysis of the communication protocol of wireless sensor network, aimed at the short comings of the classical routing protocol LEACH, considering to balance network node energy consumption, improvement is made in the aspects of the election of cluster head, cluster, and the optimal path selection.Finally this thesis uses OPNET simulation software on the improved LEACH protocol, the results prove that the improved algorithm can effectively prolong the network life cycle and reduce the energy loss. And it is very suitable for the application of the intelligent home network.