LTE-A系统载波聚合下基于用户分组的比例公平调度算法研究  

PF scheduling algorithm research based on user grouping for LTE-Advanced system with carrier aggregation

作　　者：魏玉杰[1,2] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]移动通信技术重庆市重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2013年第3期310-313,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

摘　　要：针对LTE-A系统中载波聚合技术下的资源调度问题,考虑到载波衰减特性不同,聚合的载波有不同的覆盖范围,使得不同用户可以调度的载波数量不同,从而导致比例公平调度算法不能很好地保证用户的公平性。为此提出一种基于用户分组的改进比例公平调度算法。该算法根据用户可以调度的载波数量将用户进行分组,并引入加权因子对用户组进行加权处理,从而提高用户的公平性。仿真结果表明,改进的算法能够更好地保证用户的公平性。This paper focuses on the resource scheduling of LTE-Advanced system with carrier aggregation. With different fading characteristics, the aggregated carriers have different coverage between each other. Consequently, the carrier aggre- gation causes that the number of carriers which users can be scheduled on is various. The allocation fairness cannot be a- chieved with the proportional fair （PF） scheduling algorithm. Thus, a modified PF scheduling algorithm based on user grouping is proposed. The users are partitioned into specific groups according to the number of carriers that they can be scheduled on. Further more, different user groups are weighed according to their distance to the base station. Simulation re- sults demonstrate that the modified algorithm can accomplish better fairness among users compared with the original PF al- gorithm.

关 键 词：LTE-A 载波聚合 比例公平调度算法 用户分组 

分 类 号：TN914[电子电信—通信与信息系统]