正交频分多址接入系统中双层毫微微蜂窝资源分配策略  

Resource Allocation of Two-Tier Femtocells in OFDMA Networks

作　　者：王正海[1] 王可[2] 张文健 谢桂辉[2] 

机构地区：[1]西南电子技术研究所航空电子信息系统技术重点实验室,四川成都610036 [2]武汉大学电子信息学院,湖北武汉430072 [3]江苏省邮电规划设计院通信部,江苏南京210019

出　　处：《武汉大学学报（理学版）》2015年第5期465-469,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61072135)

摘　　要：针对双层毫微微蜂窝全局频率复用引起的同信道干扰问题,提出了一种基于干扰协调的无线资源分配策略.基于瑞利衰落信道模型推出了层间干扰限制区域半径的表达式,以层间干扰限制区域半径为依据,在层间干扰限制区域半径内,通过分配正交子载波避免毫微微蜂窝的层间干扰,使蜂窝用户下行传输的中断概率满足服务质量(Qo S)要求.理论分析与仿真结果表明,本文策略能够选取合适的干扰限制半径,从而有效避免层间干扰,可为运营商资源分配提供参考.To avoid the co-channel interference caused by the frequency reuse in two-tier femtocells,this paper proposes a resource allocation strategy based on interference coordination. Assuming the Rayleigh fading channel model,the radius of inter-layer interference restricted areas in two-tier femtocells is derived. By assigning the orthogonal subcarriers to users in interference restricted areas,the interference between femtocell-users within the interference restricted areas can be eliminated,and the downlink outage probability of the cell-users can be satisfied. Theoretical analysis and simulation results show that the proposed method can effectively avoid interference between layers,and thus,give a reference to select the appropriate interference limiting radius.

关 键 词：无线通信 毫微微蜂窝 资源分配 层间干扰 

分 类 号：TN929.5[电子电信—通信与信息系统]