认知Femtocell网络中下行链路资源分配的研究

宏蜂窝和家庭基站（Femtocell）之间组成的双层网络中,由于共享频谱资源,因此增加了相互之间的干扰,从而减小了系统容量.文中针对双层网络之间的干扰,通过将认知无线电技术引入Femtocell中,进行动态频谱接入,从而减小了信道之间的干扰.Matlab仿真结果表明,构建的密集型认知Femtocell网络相比于传统的Femtocell网络,平均系统容量提高了约50％;所提出的联合信道功率分配算法在可用信道较少时,平均中断率也远低于固定功率控制算法.

Resource Allocation of Downlink in Cognitive Femtocell Networks

Due to the spectrum sharing between the two-tier networks of Macrocell and Femtocell, it increases the mutual interference resulting in the reduction of the system capacity. This paper integrates the cognitive radio technology into Femtocell networks, and control the spectrum access dynamically to decrease the mutual interference. Simulation results show that the proposed Femotocell network with cogni- tive increases an average system capacity about 50% compared with the traditional Femotocell network. In addition, the average interrupt rate by the proposed method of joint channel power control is rather lower than that of the control algorithm with fixed power.