摘要
传统两跳多用户中继网络中,协作系统的传输性能和系统资源分配的公平性取决于系统的调度方案,而平等的调度资源更是保证用户服务质量的前提。尽管采用传统的比例公平算法实现资源的分配调度,在避免用户出现极端"饿死"的同时,也不会导致系统性能过低,但是比例公平算法忽略了信道的时变特性,无法保证系统选择最优信道的连续性。因此,在比例公平算法的基础上,考虑到用户端的信道反馈中可能存在的访问时延,提出了依据用户端访问时延的改进比例公平调度算法并对其进行了蒙特卡洛仿真。仿真结果表明,该算法较好地兼顾了系统性能和调度公平性。
In the traditional two-hop multi-user relay network,the transmission performance of the cooperative system and the fairness of the system resource allocation depend on the scheduling scheme of the system.Equally scheduled resources are the prerequisite for ensuring the quality of user services.Adopting the traditional proportional fair algorithm to achieve resource allocation and scheduling can avoid the extreme starvation of the user while not causing the system performance to be too low.However,the proportional fairness algorithm ignores the time-varying characteristics of the channel and cannot guarantee the continuity of the system in selecting the optimal channel.Therefore,based on the proportional fairness algorithm,considering the possible access delay in the channel feedback of the UE,an improved proportional fair scheduling algorithm based on the client access latency is proposed and Monte Carlo simulation is performed.Simulation results indicate that the proposed algorithm can give a good balance between system performance and scheduling fairness.
作者
魏继尧
芮贤义
WEI Ji-yao;RUI Xian-yi(Soochow University,Suzhou Jiangsu 215000,China)
出处
《通信技术》
2018年第4期829-834,共6页
Communications Technology
基金
国家自然科学基金项目(No.61201213)~~
关键词
多用户调度
信道容量
公平性
反馈延迟
multiuser scheduling
channel capacity
fairness
feedback delay
