Research On Key Technology For Wireless Sensor Network Based On SimpliciTI

With the rapid development of wireless sensor network technology, the WSN in the application of all aspects of society becomes more widely, so the more demands which to reduce power consumption and costs and shorten the development cycle is necessary in WSN system development process. But in the actual development process, the existing wireless network protocol with complex functions and high costs, long development cycle can't meet the rapid development need of sensor networks. SimpliciTI is a new short-range, low data rate, simple wireless network technology, with open Source, flexibility, and low-cost, short development cycle and so on, which is suit for small-scale wireless networks to support various low-power applications, and can be used into environmental monitoring, modern long-distance agriculture control, alarm and security of buildings, home automation and so on. Therefore, the research on SimpliciTI network protocol is of important significance to upgrade the level of application and the theory of sensor networks in the theory and practice.The SimpliciTI network protocol is discussed importantly based on in-depth study of the theory of wireless sensor networks from every aspects of its models component, system framework, network layer, application layer and the structure of coordinate levels. Then the further study on the network objects, frame structure and network topology structure is presented.Aiming at the blindness problem of selecting channels when the SimpliciTI frequency agility, the mechanism of periodic synchronism and the concepts of channel list are proposed, the MRSSI channel prediction algorithm is refined, and the PSCP-FA , an accessing mechanism ,is presented based on periodic synchronism and channel prediction in the paper, which based on the study on the FA mechanism and combined accessing fashion of the CSMA/CA network.At last, a small wireless glasshouse environment monitor system is designed and realized which used the SimpliciTI into small wireless sensor network. The main parts include designs of hardware and software of system, the former used the radio chip CC2510 to be the main control chip which including the hardware connection of radio frequency unit and the design of data collecting periphery circuit; and the later includes transplant and analysis of network protocol, compile and debug the procedure and design the platform for wireless sensor network monitor. The results of experiment are analyzed which expressed that the SimpliciTI is a short-range, low data rate, simple wireless network technology, which meets the design need of network with the short development cycle, well communication effect, simple and vivid networking mode.