Abstract:  As a new research field, most of wireless underground sensor network research is still in theory stage. To establish a simulation platform closer to the real underground environment can reduce the cost of deployment experiments. Based on the two-path model and multipath fading effects, we set up the underground channel model which considers all the ingredients of electromagnetic transmission signal, at the same time, adds the underground-aboveground channel model and the aboveground-underground channel model, and is simulated on NS2. Through the simulation on the platform, this paper analyzes two performance indexes in different communication distance: the throughput and the packet loss rate. The results show that the model can be used to reflect the underground communication well, verify the feasibility of model used in underground environment simulation. The model can be used as reference and tools for future wireless underground network study and research.

Key words: WUSN, NS2, wireless channel, simulation