基于频率分配的Femto-Macro干扰抑制

Femto-Macro Interference Suppression Based on the Frequency Distribution

为有效解决由家庭基站(Femtocell)和宏基站(Macrocell)组成的双层网络间的干扰抑制问题,文中在传统频率分配的基础上提出了一种新的动态频率分配方案,该方案利用距离判定法判断家庭基站范围内是否存在宏基站,利用强干扰区域判定法判断该家庭基站是否受其它家庭基站干扰,根据判定结果决定如何进行频率分配。仿真结果表明,该方案和传统频率分配方式相比,不仅可以有效地抑制同层干扰和跨层干扰,而且还能提高频带利用率和系统吞吐量。

In order to solve the problem of the interference in a two - tier network consisting of Femtocell and Macrocell, this article proposes a dynamical scheme of frequency assignment between Femtocell and Macrocell based on conventional frequency assignment. The scheme uses the distance determination method to determine whether femtocell is within the scope of macro base station, and the strong interference area determination method to judge whether femtocell base station is interfered by other femtocell base stations. The way of frequency allocation is decided by the above results. Simulation results show the new scheme suppresses the interference and cross layer interference with effectively improved frequency band utilization rate and system capacity.