INTERFERENCE SUPPRESSION METHOD IN MACROCELL AND FEMTOCELL HYBRID NETWORK

摘要

An interference suppression method in a macrocell and femtocell hybrid network is provided. The method comprises: clustering femtocells within a certain range; controlling the transmission power of femto base stations (femtoBS) in the clusters; adjusting the femtocell clustering situation; clustering the femtocells in an interference-sensitive area; controlling, in units of clusters, the transmission power of the femto base stations in the clusters for the clustered femtocells in the interference-sensitive region; adjusting the femtocell clustering situation of the interference-sensitive area to determine the femtocell clusters of the interference-sensitive area; dividing macro user equipments into dead area user equipments and non-dead area user equipments; dividing the frequency spectrum resource into three non-overlapping parts; and, allocating the frequency spectrum resource to the interference-sensitive region femtocells, the dead area user equipments, non-interference-sensitive area femtocells and non-dead area user equipments. This method can effectively improve frequency spectrum efficiency and system capacity in macrocell and femtocell overlapped double-layer networks, and the problems of inter-layer interference between macrocells and femtocells as well as intra-layer interference among femtocells are solved effectively.