有限反馈CoMP系统中多小区差分CQI协作调度  

A Multi-Cell Delta-CQI Coordinated Scheduling for CoMP Systems with Limited Feedback

作　　者：张天魁[1,2] 王菲[1] 李博[1] 曾志民[1,2] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]网络体系构建与融合北京市重点实验室,北京100876

出　　处：《北京邮电大学学报》2013年第3期97-101,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：中央高校基本科研业务费专项资金项目(2012ZX03003006)

摘　　要：针对有限反馈的协作多点系统,提出了一种考虑小区间干扰、提高小区边缘用户吞吐量的多小区协作调度算法.利用信道质量指示值(CQI)的差值(差分CQI)表征协作区域内相邻小区的用户采用不同预编码向量时对本小区用户的干扰情况.基站根据由用户反馈、小区间交互得到的差分CQI生成干扰加权因子,结合小区内比例公平调度算法计算的优先级因子,完成协作区域内不同小区间的用户配对和调度.新算法兼顾了系统的公平性和频谱效率,通过协调不同小区用户间的干扰,提高了边缘用户的数据速率,并利用差分CQI的反馈与交互,减小了协作小区间控制信息交互量.In the coordinated multi-point systems with limited feedback,a multi-cell coordinated scheduling algorithm is proposed for inter-cell interference coordination and cell-edge user’s throughput enhancement.The concept of delta-channel quality indicator（delta CQI） is used to indicate the interference level of users in one cell when the users in adjacent cells of cooperation region using different precoding vectors.The base stations exchange the information of delta-CQI which is fed back from the users in each cell and calculate the weighted interference factor,then the user scheduling are performed by the multiple cells in the cooperative cell set along with the priority factor given by the proportional fairness scheduling algorithm used in each cell.The proposed algorithm considers the user interference among different cells to improve the data rate of users in cell edge,which gives a good tradeoff between system fairness and spectrum efficiency.Meanwhile,the overhead of the control information exchange among coordinated cells is reduced by the delta-CQI feedback and exchange.

关 键 词：协作多点 多小区协作 调度 有限反馈 

分 类 号：TN929.53[电子电信—通信与信息系统]