认知无线电中基于频谱聚合的全局比例公平调度算法  

Global proportional fairness scheduling algorithm based on spectrum aggregation in cognitive radio

作　　者：殷聪[1] 谭学治[1] 马琳[1] 于洋[1] 

机构地区：[1]哈尔滨工业大学,通信技术研究所,哈尔滨150080

出　　处：《物理学报》2014年第11期350-357,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61071104);国家科技重大专项(批准号:2011ZX03004-004)资助的课题~~

摘　　要：针对认知无线电系统中认知用户在利用频谱聚合技术时出现的调度不公平问题,提出了一种基于频谱聚合的全局比例公平调度算法.在比例公平调度的基础上,结合频谱聚合技术的特点,引入了频谱聚合的跨度与认知用户剩余数据队列长度这两个参量,使认知用户在聚合可用频谱的范围内,最大限度的保证吞吐量公平性.仿真结果表明,相比于局部比例公平调度算法和最大载干比调度算法,该算法在公平性指数和系统服务时间上更占优势,同时具有较低的吞吐量抖动,从而有效地提高系统容量和系统效率,确保认知用户之间对系统资源的公平利用.In a cognitive radio system, it is still a problem that resource scheduling among secondary users （SUs） is distributed unfairly when spectrum aggregation technology is involved to support high-speed data transmission. A global proportional fair scheduling algorithm is proposed based on spectrum aggregation to solve the problem. This paper focuses on the relation between the fairness for SUs and spectrum aggregation. Throughput fairness can be guaranteed as much as possible after considering two parameters, the span of spectrum aggregation and the remaining data queue length of SUs. Simulation results show that the proposed scheduling algorithm takes advantage of fairness and the delay of system service as compared with the other two scheduling algorithms, max C/I and partial proportional fairness. Meanwhile, it is shown that the proposed scheduling algorithm has lower throughput shake to make sure of fairness among SUs and high efficiency of system.

关 键 词：认知无线电 频谱聚合 比例公平调度算法 吞吐量公平 

分 类 号：TN925[电子电信—通信与信息系统]