Joint Optimization of The two Tier Femtocell and Macrocell Users OFDMA Network

We proposed a novel joint sub channel and resource allocation for the two-tier OFDMA network. The multi-cell OFDMA network not only has to control the interference to the users, but also has to coordinate the cross-tier interference. A resource allocation scheme for cross-channel Femto and Macro is proposed, aiming to maximize the capacity. We formulate this joint optimization for both uplink and downlink in OFDMA network will be considered. To efficiently solve this problem using dual decomposition and low complexity methods. The resulting schemes efficiently allocate the resource and data sharing in a distributed way. The simulation results show that the less interference and provide significant throughput.