两层异构蜂窝网络中femtocell和macrocell间的有效干扰管理

针对异构蜂窝网络中femtocell和macrocell之间的跨层干扰和同层干扰问题,提出了一种新型的干扰管理方案。该方案采用部分频分复用将蜂窝网络中所有小区划分成不同的空间区域抑制macrocell之间同层干扰,然后femtocell利用合作频谱感知获得可用信道资源,并通过设置干扰阈值的方式将家庭基站用户(femtocell users, FUEs)进行分簇抑制femtocell间的同层干扰。同时,该方案以跨层干扰限制为基础进行功率调整。 最后,与目前现有的计划相比,仿真结果验证了该方案能更有效地抑制系统干扰和提高系统的性能。

Efficient interference management in heterogeneous macro-femtocell networks

In order to mitigate the co-tier and cross-tier interference in heterogeneous macro-femtocell networks, a novel interference mitigation scheme is proposed. Fractional frequency reuse, which divides all cells into different spatial regions, is applied in macrocell networks with the purpose of suppressing the co-tier interference among macrocell users (MUEs). Femtocells are able to find out the available sub-channels by cooperation sense techniques. The femtocell users (FUEs) are grouped into different clusters for limiting the co-tier interference among them by setting the interference threshold. Simultaneously, the power adjustment scheme is applied based on the cross-tier interference limitation. Finally, numerical results confirm that the proposed scheme can mitigate system interference and improve performance of the system more efficiently than the current scheme.