一种改进的家庭基站频谱分配算法

An Improved Femtocell Spectrum Allocation Algorithm

摘要: 家庭基站(Femtocell)被认为是下一代通信系统新兴技术之一，为我们解决室内覆盖问题提供了一种有效的方法。而要想在已经存在的宏蜂窝网络中成功的部署家庭基站系统，仍然面临许多问题，比如，小区之间的频谱划分来最大化频谱效率最小化小区干扰，切换和功率控制等。本文从频率复用的角度，将软频率复用方法(SFR)应用到Femtocell两层网络的频谱分配算法中，给宏小区的内部区域和外部区域分配不同的功率，提出一种改进的基于SFR的家庭基站频谱分配算法。仿真结果和分析显示我们所提出的频谱分配算法能够提高宏用户的性能，最小化家庭基站的配置对宏用户性能的影响，保证小区边界用户的性能，增大系统容量。

Abstract: Femtocell is considered to be one of emerging technologies in next generation communication systems. It provides an effective method for us to solve the indoor coverage problem. However, deploying the femtocell system in the existing macrocell network still faces many problems, such as spectrum allocation between cells to maximize spectral efficiency to minimize cell interference, switching between cells and power control. In this paper, according to the frequency reuse method we use the soft frequency reuse (SFR) method to our two-tier femtocell network. Allocating different power to the internal area and external area of macrocell, we propose an improved femtocell spectrum allocation method. Simulation results and analysis showed that the proposed spectrum allocation algorithm can raise the performance of the macro users and increase the system capacity.