Feedback Theory Based Transmission Power Control In Wireless Sensor Networks

Wireless sensor network is a closely watched research field, which involves interdisciplinary and highly integrated knowledge. In this new field, wireless sensor node is purposefully arranged around detected object by human interference, and used to monitor environmental information based on demand. Nowadays, it is brought to be forefront by academia and industry of many countries and is supposed to be one of the greatest techniques in the 21 century.In the application process of wireless sensor network, the sensor nodes gather and send data in various ways to communicate. However, because the structure volume of the sensor node is relatively minor under the restriction of environment, the computing power and electric power supply capacity are relatively limited in the industrial design. Therefore, to ensure that the wireless sensor network is work normally, the main content of this research discusses how to efficiently adjust the transmitted power to make each sensor node extend the service life as long as possible in the communication between nodes.From the study of sensor node transmitted power control method, this thesis introduces different levels of power control design method put into use in the world. The key technologies in the process of algorithm implementation are discussed, which includes the establishment of wireless sensor network model, the implement of adjustment function data, the automatic self-adjustment of data, etc. With these key technologies and the desired analysis and system design of simulation under the requirement of existing sensor module, the transmitted power control of wireless sensor network based on feedback theory is realized.This paper also puts forward the direction of further study. Based on the network closely combined with the control theory domain premise, further testing is to be made and combined with practice for the Internet of Things application.