正交频分多址接入系统中双层毫微微蜂窝资源分配策略

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 王正海 WANG Zhenghai 1 first-author 王可 WANG Ke 2 张文健 ZHANG Wenjian 3 谢桂辉 XIE Guihui 2 西南电子技术研究所航空电子信息系统技术重点实验室 西南电子技术研究所航空电子信息系统技术重点实验室 Key Laboratory of Aviation Information System Technology,Southwest Research Institute of Electronic Technology Key Laboratory of Aviation Information System Technology,Southwest Research Institute of Electronic Technology 武汉大学电子信息学院 武汉大学电子信息学院 Electronic Information School ,Wuhan University Electronic Information School ,Wuhan University 江苏省邮电规划设计院通信部 江苏省邮电规划设计院通信部 Communication Department,Post and Telecommunications Planning and Designing Institute of Jiangsu Province Communication Department,Post and Telecommunications Planning and Designing Institute of Jiangsu Province 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. 无线通信 毫微微蜂窝 资源分配 层间干扰 wireless communications femtocells resource allocation inter-layer interference 10.14188/j.1671-8836.2015.05.011 TN929.53 国家自然科学基金资助项目（61072135） 2015-05-01 2021-03-31 5 61