| 基于效用最大化的DVB-RCS跨层动态带宽分配 |
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| 引用本文： | 高鑫,王祖林.基于效用最大化的DVB-RCS跨层动态带宽分配[J].宇航学报,2011,32(4). |
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| 作者姓名： | 高鑫 王祖林 |
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| 作者单位： | 北京航空航天大学电子信息工程学院,北京,100191 |
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| 基金项目： | "十一五"国防预研基金资助项目 |
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| 摘 要： | 针对已有效用函数的动态带宽分配(DBA)模型未考虑物理层信道条件来完成DVB-RCS(Digital Video Broadcasting-Return Channel via Satellite)卫星通信网的DBA,从而导致吞吐量下降这一缺点,本文提出一种跨层效用函数DBA模型.该模型建立基于信道条件的效用函数,以实现效用最大化的DBA,因此转化为非线性整数规划问题的求解.同时提出一种基于等效用增量的Greedy迭代算法求解该问题,求出效用最大化的带宽分配向量,降低了传统Greedy算法的计算量.仿真结果表明该模型在保证回传信道卫星终端(Return Channel Satellite Terminal,RCST)用户公平性的同时,提升DVB-RCS卫星通信网的吞吐量.
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| 关 键 词： | DVB-RCS 效用 动态带宽分配 跨层 |
Utility Maximization-Based DVB-RCS Cross-Layer Dynamic Bandwidth Allocation |
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| GAO Xin,WANG Zu-lin.Utility Maximization-Based DVB-RCS Cross-Layer Dynamic Bandwidth Allocation[J].Journal of Astronautics,2011,32(4). |
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| Authors: | GAO Xin WANG Zu-lin |
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| Institution: | GAO Xin,WANG Zu-lin (School of Electronics and Information Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China) |
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| Abstract: | The existing dynamic bandwidth allocation(DBA) model based on utility function is unable to take account of channel condition in physical layer during implementing DBA in digital video broadcasting-return channel via satellite(DVB-RCS) satellite communication network,so that it brings in the disadvantage of throughput reduction.To tackle above weakness,a DBA model based on cross-layer utility function is proposed.This model is used to build channel condition-based utility function to realize a DBA of utilit... |
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| Keywords: | DVB-RCS Utility Dynamic bandwidth allocation Cross-layer |
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