无线通信系统小区间干扰控制技术

摘要

小区间干扰是蜂窝移动通信系统的一个固有问题,严重影响到系统的覆盖能力及系统容量.特别是对于小区边缘用户,将会直接导致他们出现频繁掉网或无法接入网络的情况.从现有的研究成果和各种标准化组织(LTE、IEEE 802.16m、UMB)对小区间干扰控制的方案来看,小区间干扰控制主要包括包括干扰随机化、干扰抵消以及干扰协调3类方法.文章中主要分析了干扰协调中的3种典型技术——部分频率复用、多基站多输入输出(MIMO)和功率控制,并且介绍了这3种技术在各种标准化组织中的具体实现方案.%Inter-cell interference is an inherent problem in cellular mobile communication systems and seriously impacts coverage and capability of a system. For cell edge users, inter-cell interference results in frequent dropping from the network or denial of access to the network. Most standards organizations have conducted research into inter-cell interference control for LTE, IEEE 802.16m, and UMB. As a result, different methods have been devised to deal with the problem, including inter-cell interference randomization, inter-cell interference cancellation, and inter-cell interference coordination. This paper introduces three kinds of effective inter-cell interference coordination technologies: fractional frequency reuse, multi-BS multiple-input multiple-out-put (MIMO), and power control. This paper also introduces the schemes implemented by standards organizations.