AOS中基于NSGA-Ⅱ的带宽与功率分配方法研究  

Research on Bandwidth and Power Allocation Method Based on NSGA-Ⅱin AOS

作　　者：刘治国[1,2] 宋广跃[1,2] 刘庆利 卢美玲[1,2] LIU Zhi-guo;SONG Guang-yue;LIU Qing-li;LU Mei-ling(Communication and Network Laboratory,Dalian University,Dalian Liaoning 116622,China;School of Information Engineering,Dalian University,Dalian Liaoning 116622,China)

机构地区：[1]大连大学通信与网络重点实验室,辽宁大连116622 [2]大连大学信息工程学院,辽宁大连116622

出　　处：《计算机仿真》2020年第9期129-135,共7页Computer Simulation

基　　金：国家自然科学基金(61571074);国防预研基金(61405180402);大连市高层次人才创新支持计划(2016RQ076)。

摘　　要：针对AOS空间通信系统中带宽利用率不高、无法满足业务Qos要求和吞吐量低等问题,提出一种基于NSGA-Ⅱ算法的多目标带宽与功率跨层优化分配方法。方法综合考虑数据链路层积压队列比、信道状态、应用层Qos要求、物理层发射功率等信息,建立带宽效用函数和系统吞吐量函数,动态改变调制与编码效率并通过NSGA-Ⅱ算法求解多目标优化函数,使带宽、功率分配与系统吞吐量同时达到最优。仿真结果表明,上述方法在满足业务Qos要求下,提高带宽利用率,减少功率消耗,提升系统吞吐量,保证业务公平性,优于单目标优化方法和典型跨层资源优化方法。A multi-target bandwidth and power cross-layer optimization allocation method based on NSGA-Ⅱal⁃gorithm is proposed to solve the problems of low bandwidth utilization,unsatisfiable service QoS requirements,and low throughput in AOS space communication systems.This method comprehensively considers the backlog ratio of data link layer,channel state,QoS requirements of application layer,transmit power of physical layer and other informa⁃tion,establishes bandwidth utility function and system throughput function,dynamically changes modulation and cod⁃ing efficiency,and solves multi-objective optimization functions by NSGA-Ⅱalgorithm.The multi-objective optimi⁃zation function makes bandwidth,power allocation and system throughput can reach the optimum at the same time.Simulation results show that the proposed method can improve bandwidth utilization,reduce power consumption,im⁃prove system throughput,and ensure fairness of services under the condition of satisfying QoS requirements of serv⁃ices.It is superior to single-objective optimization methods and typical cross-layer resource optimization methods.

关 键 词：空间通信 跨层优化 效用函数 多目标优化 带宽分配 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]