Using a TIDI based assimilation model as the lower boundary condition at 95 km, we run the NCAR Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) to simulate the mesospheric tidal effect on the thermosphere. The TIEGCM model is a self-consistent community model. Past observations have shown that the nonmigrating tide can affect the ionosphere. The goal of this study is to understand the contributions from the dynamo effect and tidal propagation. Using the TIDI based assimilation model as the lower boundary condition has two advantages. First it can provide consistent wind, temperature, and geopotential variability at the lower boundary of the TIEGCM. Second, it still contains the seasonal and interannual variations of the TIDI observation. We will show some the of simulation results. Both semidiurnal and diurnal tides will be examined. Comparisons with observation will be provided when data are available.