Journal of Computer Applications ›› 2014, Vol. 34 ›› Issue (5): 1239-1242.DOI: 10.11772/j.issn.1001-9081.2014.05.1239

• Network and communications • Previous Articles     Next Articles

Effective inter-cell interference coordination scheme in long term evolution femtocell network based on soft frequency reuse

LI Yanan,SU Hansong,LIU Gaohua,LI Yuan   

  1. School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China
  • Received:2013-11-04 Revised:2013-12-09 Online:2014-05-01 Published:2014-05-30
  • Contact: LI Yanan



  1. 天津大学 电子信息工程学院,天津 300072
  • 通讯作者: 李亚男
  • 作者简介:李亚男(1988-),女,河北唐山人,硕士研究生,主要研究方向:无线通信;苏寒松(1960-),男,河南滑县人,教授,博士,CCF会员,主要研究方向:无线通信、光通信、移动通信、光纤传感;李媛(1957-),女,河北保定人,副教授,硕士,主要研究方向:现代天线理论与技术、微波与毫米波技术、电磁理论与数值分析;刘高华(1987-),女,山东烟台人,工程师,硕士,主要研究方向:无线通信。


Femtocell is a small low powered base station which can provide an increase in system capacity and better indoor coverage for two-tier Long Term Evolution (LTE) network. However, interference problem between the femtocell and the Microcell eNodeB (MeNB) should be solved in advance. Concerning the interference between them, an effective Inter-Cell Interference Coordination (ICIC) scheme using Soft Frequency Reuse (SFR) was proposed in LTE femtocell system. Under the macrocell pre-allocating frequency band by the SFR, the femtocell user equipments chose sub-bands which were not used in the macrocell sub-area to avoid co-channel interference. At the same time, when the femtocell was located in the center of a macrocell, it was not going to select the sub-bands which were occupied by the boundary region of the same sector. Simulation results show that the proposal scheme improves the throughput performance of overall network by 14% compared to the situation without ICIC, and the average throughput of cell edge users increases by 34% at least.


家庭基站是一种小体积、低发射功率的基站,它为长期演进(LTE) femtocell双层网络提供更好室内覆盖的同时也增加了整个系统的容量。然而,femtocell和宏基站(MeNB)之间的干扰不容小觑。针对二者间的干扰问题,提出一种基于软频率复用(SFR)的有效的LTE femtocell网络的小区间干扰协调(ICIC)方案。该方案中,为避免共信道干扰,先对宏小区进行SFR频域资源分配,然后让femtocell用户使用宏基站未占用的频域资源;并且当femtocell位于宏小区中心区域时,不使用同一扇区边缘区域占用的频带。仿真结果表明,此方案减小了不同类型用户间的干扰,整个网络的吞吐量比没有使用ICIC技术的情况提高了14%,同时小区边缘用户的平均吞吐量至少提高了34%。

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