高公平性的OFDMA自适应资源分配方案  

OFDMA adaptive resource allocation scheme with high fairness

作　　者：袁建国[1,2] 张芳 王永[1,2] 庞宇 Yuan Jianguo;Zhang Fang;Wang Yong;Pang Yu(College of Optoeleetronic Engineering;Chongqing Key Laboratory of Photoelectronie Information Sensing and Transmitting Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]重庆邮电大学光信息感测与传输技术重点实验室,重庆400065

出　　处：《华中科技大学学报（自然科学版）》2018年第4期99-104,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61472464,61671091,61471075);重庆市基础与前沿研究计划资助项目(cstc2015jcyj A40015)

摘　　要：针对基于速率自适应准则的正交频分多址自适应资源分配中系统容量和用户公平性的不兼容性问题,提出一种高公平性的自适应资源分配方案.该方案通过基于高公平性的子载波分配算法和基于模拟退火的人工蜂群算法的功率分配实现.在子载波分配算法中,通过引入比例因子a,将子载波分为两部分,首先选取a N个子载波分配给速率比例低的用户,以保证用户间的高公平性;然后将剩余子载波分配给信道增益最高的用户,且每个用户最多只能分配一个子载波,以提高系统容量.在功率分配中,利用基于模拟退火的改进人工蜂群算法实现在所有用户之间的功率寻优,以此获得更大的系统容量.仿真结果表明：所提出的方案不仅保证了用户之间的高公平性,而且有效增加了系统容量,证明了该算法的有效性.In order to solve the non-compatible problems of the system capacity and the user fairness in the orthogonal frequency division multiple access（OFDMA） adaptive resource allocation based on the rate adaption criterion,a adaptive resource allocation scheme with the high fairness was proposed.The scheme was achieved by the subcarrier allocation algorithm based on the high fairness and the power allocation algorithm based on the simulated annealing and improved artificial bee colony algorithm.The scaling factor a was introduced into the subcarrier allocation algorithm,and the subcarriers were divided into two parts.First,the a N subcarriers were allocated to the users with the lower ratio to ensure the high fairness among the users, and then the remaining subcarriers were allocated to the users with the maximum channel gain,and every user could at most be assigned a subcarrier in order to improve the system capacity.In the power allocation algorithm,the power optimization among all the users was achieved by taking the advantage of the improved artificial bee colony algorithm based on the simulated annealing in order to achieve the greater system capacity.Simulation results show that the proposed scheme can not only ensure the high fairness among the users but also improve the system capacity effectively.Therefore,the effectiveness of the proposed scheme was proved.

关 键 词：正交频分复用 自适应资源分配 子载波分配 功率分配 人工蜂群算法 

分 类 号：TN929.5[电子电信—通信与信息系统]