一种用于优化VLC/WiFi异构网络资源的动态比例公平算法  

Dynamic proportional fairness algorithm for optimizing VLC/WiFi heterogeneous network resources

作　　者：杨立伟 王志立 赖文聪 朱福荣 YANG Liwei;WANG Zhili;LAI Wencong;ZHU Furong(College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《光通信技术》2023年第5期1-5,共5页Optical Communication Technology

基　　金：国家自然科学基金项目(No.61705260)资助;中国农业大学2115人才培养计划项目资助。

摘　　要：为了提高可见光通信(VLC)/WiFi异构网络中的资源利用率,提出了一种动态比例公平(PF)算法。该算法通过引入补偿因子α来优化用户的优先级。首先,理论推导了VLC/WiFi异构网络的吞吐量、资源利用率和公平性指数等关键性能指标;然后,使用Matlab软件进行仿真,构建了一个VLC/WiFi异构网络系统;最后,将动态PF算法、PF算法以及最大载干比(Max C/I)算法在吞吐量、资源利用率、公平性以及访问延迟概率等方面的性能进行了对比。仿真结果表明:动态PF算法的吞吐量高于PF算法,并且远高于Max C/I算法;这3种算法的资源利用率均较高,均不低于0.96;动态PF算法的公平性指数约为0.97,优于其它2种算法,并且访问延迟概率较低。In order to improve resource utilization in visible light communication(VLC)/WiFi heterogeneous networks,a dynamic proportional fairness(PF)algorithm is proposed.The algorithm optimizes the user's priority by introducing a compensation factorα.Firstly,the key performance indexes of VLC/WiFi heterogeneous network such as throughput,resource utilization and fairness index are theoretically derived.Then,a VLC/WiFi heterogeneous network system is constructed by using Matlab software for simulation.Finally,the performance of dynamic PF algorithm,PF algorithm and Max C/I algorithm in terms of throughput,resource utilization,fairness and access delay probability is compared.The simulation results show that the throughput of dynamic PF algorithm is higher than that of PF algorithm and much higher than that of Max C/I algorithm.The resource utilization rate of these three algorithms is higher than 0.96.The fairness index of dynamic PF algorithm is about 0.97,which is better than the other two algorithms,and the probability of access delay is lower.

关 键 词：可见光通信 无线保真 异构网络 比例公平算法 

分 类 号：TN929[电子电信—通信与信息系统]