具有用户QoS要求的无小区mMIMO系统最优下行功率分配策略  

Optimal Downlink Power Allocation Strategy for Cell FreemMIMO Systems with User QoS Requirements

作　　者：牛海斌 苏昕 孙文龙 王雷 孙韶辉 NIU Haibin;SU Xin;SUN Wenlong;WANG Lei;SUN Shaohui(CICT Mobile Communications Technology Co.,Ltd.,Beijing 100083,China;State Key Laboratory of Wireless Mobile Communications,China Information Communication Technology Group Co.,Ltd.(CICT),Beijing 100191,China)

机构地区：[1]中信科移动通信技术股份有限公司,北京100083 [2]中国信息通信科技集团无线移动通信全国重点实验室,北京100191

出　　处：《无线电通信技术》2023年第6期1006-1012,共7页Radio Communications Technology

基　　金：湖北省科技创新人才及服务专项科技服务人才类项目“面向下一代移动通信系统(6G)的关键技术研究”(2022EJD016)~~。

摘　　要：无小区大规模天线多输入多输出(Multiple-Input Multiple-Output, MIMO)系统采用部署大量的分布式接入点,在相同的时频资源上同时服务所有用户,可以满足用户日益不断增长的高数据速率需求,因此在未来6G中被寄予厚望。针对未来6G中用户的业务流量呈现多样性的特点,可把用户分为两大类:一类为时延敏感用户;另一类为时延容忍用户。考虑了一个在保证时延敏感用户服务质量(Quality of Service, QoS)的前提下,最大化用户最小速率的优化问题,通过优化每个接入点的功率分配系数,求解优化问题得到最优解。通过数值仿真将所提出的优化算法求出的最优功率分配系数与均匀功率分配基准算法求得功率分配系数进行了对比,实验结果表明所提出算法在各种指标下均优于对比基准。The cell free massive Multiple-Input Multiple-Output(MIMO)system adopts the deployment of a large number of distributed access points,serving all users simultaneously on the same time-frequency resources,which can meet the increasing high data rate needs of users.Therefore,it is expected to be of great importance in the sixth generation wireless communication(6G)in the future.In response to the diversity of user traffic in future 6G,users are divided into two categories:delay sensitive users and delay tolerant users.This paper considers an optimization problem to maximize the minimum user rate under the premise of guaranteeing the Quality of Service(QoS)of delay sensitive users.By optimizing power allocation coefficient of each access point,the optimization problem is solved to obtain optimal solution.Finally,through numerical simulation,the optimal power allocation coefficient obtained by our proposed optimization algorithm is compared with the power allocation coefficient obtained by uniform power distribution benchmark algorithm.Experimental results show that the proposed algorithm is better than the comparison experiment under various indicators.

关 键 词：无小区大规模多输入多输出 6G 服务质量 功率分配 

分 类 号：TN929.53[电子电信—通信与信息系统]