Abstract: The spreading dynamics of wireless sensor networks ( WSN) was analyzed by considering the basic charac- teristics of WSN and the characteristics of sensor virus infection process. The different WSN models were established by employing different sensor deployment patterns, which include uniform random deployment, clustered deployment, group Gaussian deployment and random grid deployment. A virus spreading model was established based on infectious disease theory by considering the propagation characteristics of WSN and the impact of different MAC mechanism on virus spreading in WSN. The simulations show that the local group node deployment pattern would speed up the sprea- ding of virus in WSN, while the sleep/wake up communication mechanism would slow down the spreading of virus, re- duce the risk of the virus rapidly spreading in WSN.

Key words: Wireless sensor networks(WSN) , Virus spreading model, Sleep/wake-up mechanism