Reduced power centralized eICIC for LTE-advanced heterogeneous networks

With heterogeneous network developing, eICIC technology is widely considered and developed. eICIC is introduced to address the problem of downlink interference in HetNet. In the traditional eICIC, some pico users are scheduled in the protected subframe (referred to as almost blank subframe ABS) in which macrocell stops scheduling users. This causes serious loss of the cell throughput which ABS is applied. In this paper, on the basis of centralized eICIC, reduced power centralized eICIC technology is put forward, which the macrocell reduces transmission power in the protected subframe. We use CRE pico user information transmission rate to calculate macrocell transmission power, then the macrocell transmits the reduced power. More macro users will be served, and cell throughput will be improved. Simulation results show that cell throughput and mean user throughput are improved by employing reduced power (RP) centralized eICIC.