SON and Femtocell Technology for LTE-Advanced System

To eliminate dead spots like home or office and let multiple users efficiently use limited frequency resources by providing a better wireless environment that enables highcapacity data transmission service, the demand for a small base station is increasing. Accordingly, when the new base station is installed adjacent to a base station or by its own, the research for automatically minimizing the interference and increasing the capacity of the base station by optimizing the cell coverage has become necessary. For this purpose, extremely reducing the cell radius and providing a wireless environment for small business are needed. The femtocell services actively respond to the user's needs for a better wireless environment, and expanding business opportunities for the operators. The most important aspect to consider is the qualitative and quantitative service improvement of the technology. In this paper, we study the main technical issues, the standardization status and technological trends currently in progress related to femtocell.