一种基于CQI反馈参数和SINR数值分组的调度算法  

A schedule algorithm based on feedback parameter of CQI and numerical grouping of SINR

作　　者：张晓峰[1] 乔瑞萍[1] 刘贵忠[1] 俞璐[1] 雷江[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《重庆邮电大学学报（自然科学版）》2013年第6期731-737,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金："新一代宽带无线移动通信网"国家科技重大专项课题(2010ZX03003-001-02);国家自然科学基金(60902045);国家高技术研究发展计划(863计划)(2011AA01A105)~~

摘　　要：在长期演进(long term evolution,LTE)系统中,调度算法是其无线资源管理(radio resource management,RRM)的一项核心技术。对于LTE下行链路数据传输,演进基站(evolved node B,eNode B)主要依据上行链路用户设备(user equipment,UE)传输的信道质量指示(channel quality indicator,CQI)反馈参数来选择典型的调制和编码方案(modulation and coding scheme,MCS),以此来确定各个UE的服务次序及所分配的物理资源块(physics resource block,PRB)数目。为此,结合轮循(round robin,RR)算法和比例公平(proportional fair,PF)算法,提出了一种基于CQI反馈参数和信干噪比(signal to interference plus noise ratio,SINR)数值分组的调度算法。通过设置SINR阈值,将小区内用户分为小区中心用户组Ⅰ和小区边缘用户组Ⅱ,尔后依据CQI机制对2个用户分组分别采用PF算法和RR算法进行调度。通过搭建LTE动态系统级仿真平台,并与PF算法进行仿真对比,结果表明,该算法能够较为有效地提高系统吞吐量和用户之间的公平性。In the LTE （long term evolution） system, the schedule algorithm is the core technology in RRM（ radio resource management）. For the data transmission in the downlink LTE system, the eNode B chooses typical MCS（modulation and coding scheme） according to the feedback parameter of CQI（ channel quality indicator） of the UE uplink transmission to confirm the service order of each UE （ user equipment） and the amount of the distributive PRB （ physical resource block）. Hence, a packet schedule algorithm, which is based on the feedback parameter of CQI and the group of SINR（ signal-to-in- terference plus noise ratio） , is proposed in this paper. By setting the reasonable threshold of SINR, the proposed algorithm divides UEs of the cell into two groups ： Group I contains central UEs of the eel1 and Group ]I contains marginal UEs of the cell. Then it respectively uses PF（ proportional fair） algorithm and RR（ round robin） algorithm to schedule all of the UEs in the cell. By constructing the dynamic system level simulation platform of LTE and contrasting the proposed algorithm with PF algorithm, the simulation results were obtained and showed that the proposed algorithm could effectively improve the sys- tem throughput and the fairness among the UEs.

关 键 词：长期演进(LTE) 分组调度 信干噪比(SINR) 吞吐量 公平性 

分 类 号：TN929.5[电子电信—通信与信息系统]