Link Modeling And Arithmetic Simulation For The Wireless Sensor Networks

The wireless sensor network (WSN), which is utilized a broad foreground in modern social life, is able to instantly monitor and collect various information of different objects in the network-distributed area. Only with practical application can make the technology be valuable. And the power control is just the main supporting technology for the wireless sensor networks to apply to practice. Through simplifying network topology and raising the utilization rate of the web link, power control can prolong the existing time for the networks.Here, from the perspectives of practice,the research is based on the site experiment and theoretical analysis. The chief contribution here is building the wireless sensor network test platform based on the Mica2node. Through site experiment and data acquisition, the writer analyses the three kinds of link quality criteria, finds out ways to modeling the transmission channel link, and comes up with a strategy for variable power control algorithm (VPCA), combining with the optimal neighbor node choosing strategy and power regulation mechanism.By describing VPCA and simulation experiment, the writer proves that VPCA can make the wireless sensor networks have good channels and stable link,simplify the network topology, and improve the overall performance of the network. Moreover, comparing with the transmit power routing algorithm, VPCA is more efficicent in network connectivity, stability, latency and energy efficiency. From the experiment conclusion and theory analysis, the writer has achieved the desired goal which is to supply referrences to applying the link modeling and arithmetic simulation into practical use.