A self-consistent global discharge simulation code, which combines a global transport module and a radiofrequency (RF) wave heating module in a self-consistent manner, has been developed for the Hanbit-device discharge modeling. Global fluid equations of ions and electrons are solved with oxygen impurity recycling equations in the global transport module, while Maxwell-Boltzmann equations are solved by the mode analysis technique in the RF heating module. Using the code, the global transport dynamics of ions, electrons, neutrals, and oxygen impurities can be studied as a function of external parameters, in the self-consistent calculation of the RF power deposition into the plasma from a model antenna system. Here, a simulation study is presented for the reference operation mode of the Hanbit mirror device to predict its performance.