基于QoS驱动的OFDMA中继系统节能资源分配算法研究  

Study on QoS-driven energy-efficient resource allocation algorithm in OFDMA relay systems

作　　者：唐冬[1] 陈威[1] 黄高飞[1] 郑晖[1] 刘贵云[1] 刘外喜[1] 

机构地区：[1]广州大学机械与电气工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2015年第6期60-64,91,共6页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61403089);广东省科技计划资助项目(2013B010402018;2013B020200016);广州市科技计划资助项目(2014J4100142;2014J4100233);广州市教育局科技计划资助项目(2012A082)

摘　　要：文章研究基于QoS驱动的OFDMA放大转发中继系统节能资源分配算法,目标是在满足各用户业务时延QoS要求的前提下,最小化OFDMA中继系统总功率.基于有效容量模型,首先把OFDMA放大转发中继系统资源分配问题形成为混合整数规划问题,然后通过整数约束连续松弛化,把问题转化为凸优化问题.通过求解该凸问题,推导得到了资源分配的迭代优化算法.仿真结果表明,与已有算法相比,对于各种类型时延QoS要求的无线业务,文章提出的资源分配优化算法均可明显降低系统消耗功率.In the paper, the QoS-driven energy-efficient resource allocation algorithm for OFDMA amplify-andforward relay systems is investigated. The goal is to minimize the system total power while providing delay QoS guarantees for the services of the users in the system. Firstly, based on the effective capacity model, the resource allocation problem is formulated as a mixed integer programming problem. Then, the problem is transformed into a convex problem by continuous relaxation on integer constrains. By solving the convex problem, an alternative algorithm to optimize the resource allocation is developed. The derived analytical and simulation results show that compared with the existing algorithms, the developed resource allocation optimization algorithm can decrease much power consumption under various delay QoS constraints of transmission services.

关 键 词：正交频分多址(OFDMA) 无线中继 服务质量(QoS) 子载波对分配与功率分配 有效容量 凸优化 

分 类 号：TH12[机械工程—机械设计及理论]