Mechanism performance evaluation of access user in OFDMA femtocell

Femtocell is one of the micro base station technologies, use low power levels and operates in licensed spectrum and connected to the Internet with backhaul networks, which is used to expand the coverage and increase capacity, and the installation is auto configuration. The basic of this technology is due to the difficulties of mobile user to get the best signal from base station, one of them is the place which has many building. Femtocell technology have 3 access methods to the subscriber and the non-subscribers, they are open-access, closed-access, and hybridaccess. In this paper, the channel capacity of access method in femtocell will be compared with using OFDMA block diagram. Simulation parameter is using LTE standardization for downlink transmission with 10 MHz bandwidth. The simulation results in this paper show that the channel capacity of closed access is bigger than open and hybrid access with 48.008 Mbps in additional with 3 user femto, 77.4 Mbps with 7 ^km/_h of user femto mobility and 102.3 Mbps in with the distance of user femto to FAP is 5 meter with voice service (the minimum BER 10^-3).