基于基站间合作的下行干扰协调方法及其性能评估  

Two interference coordination schemes based on cooperation between base stations and their performance analysis

作　　者：张健[1] 戎璐[1] 胡宏林[1] 

机构地区：[1]中科院上海微系统与信息技术研究所上海无线通信研究中心,上海200050

出　　处：《高技术通讯》2009年第8期785-789,共5页Chinese High Technology Letters

基　　金：863计划(2006AA01Z280);上海市研发公共服务平台建设专项(07dz22023)资助项目

摘　　要：从基站间合作的角度研究了蜂窝系统下行多小区干扰协调问题。引入了合作虚拟小区的概念,并提出了三扇区合作虚拟小区规划方案和双扇区合作虚拟小区规划方案。所提方案在实现小区间干扰协调的同时,还可使系统实现同频组网和无缝切换。仿真结果显示,与传统的频率复用方式相比,合作虚拟小区方案能很好地平衡小区内不同位置频谱效率的分布,改善边缘用户的性能。其中,双扇区合作方案可使系统中断概率比频率复用方式(1,3,3)下降5%以上,而且其扇区吞吐量与频率复用方式(1,3,1)相当。The downlink inter-cell interference coordination problem in cellular systems is studied in this paper from the perspective of base station cooperation. The concept of virtual cooperative cell is introduced, and two specific virtual cell planning schemes i.e. the three-sector cooperative and the two-sector cooperative, are proposed. The proposed schemes can get effective interference coordination, and also enable single frequency network planning and seamless handover. The simulation results show that the proposed schemes can balance the distribution of the spectrum efficiency of different positions in each cell and improve the performance of the cell-edge users. The two-sector cooperative scheme can reduce the system outage by 5 % compared to the conventional （1, 3, 3） reuse scheme and achieve the sector throughput close to the conventional （1, 3, 1） reuse scheme.

关 键 词：蜂窝系统 同频组网 干扰协调 小区规划 合作传输 

分 类 号：TN929.53[电子电信—通信与信息系统]