For Wireless Sensor Networks Based On The Cc2420 System Design And Implementation

Along with the rapid development of wireless communication technology, the sensor technology, information acquisition and processing technology, appeared the micro wireless sensor node which has the low cost, the low power consumption and the multiple functions. Sensor networks are integration of sensor techniques, nested computation techniques, distributed computation techniques and wireless communication techniques. They can be used for testing, sensing, collecting and processing information of monitored objects and transferring the processed information to users. Sensor network is a new research area of computer science and technology and has a wide applicable future. This wireless network system is widely applied in the area of national defense and military affair, national safety, monitor and survey in environment, transportation management, medical treatment, sanitation, manufacturing, antiterrorism, disaster salvation and so on. This system has great developing potentials, which arouses great concern from academia and industrial area.Considering the great prosperity for application in the wireless sensor network, the thesis designs and realizes wireless sensor network system based on CC2420. The thesis also relies on nation's National Committee of Development and Revolution Project" IPV6 wireless sensor network node". The system is consisted of control center, gateway node and some normal nodes. The information collected by these sensor nodes is fused and sent to control center.First this paper introduces the background and application of wireless sensor networks and analyzes the characteristics of WSN, then designs and implements the entire system. The feature and purpose of this thesis is to propose new algorithm to accommodate this platform and simplify and improve algorithm to assure the validity and correctness of transmission is the feature and purpose of this thesis. The innovation of this paper lies in:1. The appropriate protocol is designed on the hardware platform based on EM78815 and CC2420; 2. On the research of WSN OS,a scheduling algorithm based on priority is proposed;3. On the research of data link layer, a more useful protocol including ack,CRC,address recognition and CSMA/CA is proposed.