Fill-in solution for the coverage hole in the indoor environment

Because of the complexity of WCDMA system and the engineering reason, the coverage hole is possible in a completed radio network. The fill-in solution for the coverage hole of the existed radio network in the indoor environment is introduced here. We discuss the suitable case of the fill-in solution. In the comparison of the two methods in the fill-in solution, the fill-in site with the same frequency and the fill-in site with the different frequency, is also investigated with WCDMA dynamic simulation tool. Finally, some conclusions are drawn.