Research And Implement On Interference Coordination In Femtocell Network

With the development of the technology of wireless communication, users’ demand for good-quality and high-speed date transmission is more and more. as most of the date service is from indoor, this demand is higher and higher. The LTE brings in femtocell to cope with the demand.femtocells can efficiently improve the quality of indoor coverage, offload the traffic of macrocell.But the import of femtocells also cause a lot of problems, Interference is one of the important factors which affect the performance of femtocells. In order to guarantee the performance of communication, effective schemes should be taken to maximal reduce the co-tier and cross-tier interference of femtocells. Traditional clustering interference coordination schemes can solve the problem to a certain extent, but it will also reduce the utilization of the spectrum, still can not improve the system throughput efficiently. Therefore, the interference coordination of femtocells in LTE is still a hot spot in study.This paper concentrates on the interference coordination technology of femtocells, especially study the traditional interference coordination schemes which includes frequency reuse schemes and power control schemes, and analyze these schemes in turn. To cope with the Intensive distribution of femtocells, we propose an interference mitigation scheme of femtocell network based on non-orthogonal clustering, on the basis of the traditional orthogonal clustering, further search each cluster and find those base stations which can use the resource of other clusters without interference, then allocate the corresponding resource to these base stations. This scheme can not only solve the problem of interference, but also can improve the system throughput and the utilization of the spectrum.In order to verify the correctness and feasibility of our algorithm, we simulate our algorithm through the eclipse simulation platform. The simulation results show that our scheme can solve the interference problem in intensive distribution scenario efficiently.