Study And Implementation Of A Wireless Sensor Network Simulator (snsim)

As a new technology, Wireless Sensor Network (WSN) is in rapid development and widely applied to industry, life, scientific research, environmental monitoring, transportation control, intelligent house, etc. in recent years. Temperature, humidity data sensed will bring people a better understanding of monitored environment such as unknown or dangerous environment.Since sensor networks are more and more applied, research of sensor network also attracts more and more attention. However, there are varieties of difficulties in carrying out experiment on a real sensor network. Firstly, it is expensive to construct a large-scale sensor network. Secondly, it seems very difficult to carry out repeated experiments in a real network. Moreover, there is difficulty in deploying experimental environment. In brief, it cost a lot to perform experiments on a real sensor network.It is an effective method of analyzing and researching the sensor network system to build a real system model and perform experiments on it. For research of sensor networks, building an effective model can reduce time and cost of experiments, which is particularly necessary in comparing validity and effect of algorithms. This thesis has conducted thorough research in model description, simulating strategy, system specification and result analysis, etc. in the sensor network simulation platform. And we have proven the homomorphism between the simulation model and real system, and the homomorphism indicates that this system model has similar characteristics and changing regulations to those of the real one. Therefore, we can carry out analysis and research on the simulation model instead. of a real one to some extent.According to the simulation model, we design and implement the wireless sensor network simulator SnSim (Sensor Network Simulator). We describe its function demands, and divide modules according to function demands, elaborate functions and related concepts of each module, and then explained the architecture of the system. Moreover, we carried out detailed introduction of implementation and feathers of the system. The goal of developing the SnSim system is implementing algorithms and evaluating the algorithms for users. In the last part of this thesis, we discuss two real development cases to show the extensibility and the usability of SnSim.