一种支持宏分集策略的软分数频率复用方法

Soft Fractional Frequency Reuse Scheme with Macro Diversity

在3GPP2 AIE的框架标准中同时要求采用频率复用和宏分集,但是现有的频率复用方法是无法支持宏分集策略的.鉴于此,在软分数频率复用方法的基础上,基于可拓集合思想,通过建立可用频段与研究区域之间的物元模型,得到了一种能够在小区边缘支持宏分集的软分数频率复用方法.研究表明该频率复用方法在有效降低小区干扰的同时提高了频率利用率,同时小区边缘用户由于小区间干扰的协调以及宏分集策略带来的增益,性能得到了较大提高.仿真结果表明该方法有效地提高了小区边缘的平均容量.

Frequency reuse and macro diversity are both requested in 3GPP2 AIE system, but current frequency reuse seheines do not support macro diversity. In order to obtain a frequency reuse scheme with macro diversity, a novel frequency reuse scheme based on soft fractional frequency reuse （SFFR） is proposed. Furthermore, matter-element model, using extension set theory, is established. By analyzing the model, a scheme called SFFR, supporting macro diversity, is derived. Study shows that the proposed scheme can effectively reduce the inter-cell interferences as well as increase spectral efficiency. Furthermore, performance of cell-edge users is improved because of interference coordination and macro diversity gain. Simulation results show that this scheme improves average capacity of cell-edge.