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DOI:
Journal of Software:2010.21(zk):341-348

OFDMA 协同网络中基于QoS 保证的资源分配算法
邱琳,宋美娜,宋俊德
(北京邮电大学 计算机科学与技术学院,北京 100876)
QoS Aware Resource Allocation Algorithm in OFDMA Cooperative Network
QIU Lin,SONG Mei-Na,SONG Jun-De
(School of Computer Science and Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China)
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Received:July 01, 2010    Revised:December 10, 2010
> 中文摘要: 针对正交频分多址(OFDMA)协作通信系统,为了解决数据传输速率最大化并提供尽力而为业务与实时业务的服务质量(QoS)保证问题,提出新型资源分配算法.通过以总功率受限为约束条件,定义基于数据速率、时延和丢包率的效用函数,并以在协作传输中以最大化效用函数为目标进行中继选择和子载波分配.通过中继和用户上的子载波和功率分配方案的设计,从而最大化网络数据传输速率并最小化时延与丢包率,为多种业务提供服务质量保证.采用最优化理论与方法求解效用函数,得到了资源分配结果.仿真结果验证了算法收敛,并给出功率分配结果,以及网络吞吐量和时延性能指标情况,验证了算法的有效性.
Abstract:This paper investigates resource allocation in OFDMA cooperative networks for maximizing the network data rate and providing QoS guarantees of best effort services and real time services. It defines a network utility function of data rate, delay, and packet loss with power constraints, and the relay and subcarrier dedicated to achieve the optimal utility will be selected for cooperation transmission. With the proposed resource allocation scheme for power allocation on user-relay pairs or only the user over each subcarrier, QoS guarantees of different applications will be achieved. The objective of resource allocation is to strike a balance between maximizing the data rate utility and minimizing the delay and packet loss. By using the optimization theory and related methods, this paper solves the utility function and derives the resource allocation result. Simulation results show that the algorithm can converge. And they show the effectiveness of the algorithm by presenting the power allocation result and the throughput performance and delay performance of the proposed scheme.
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基金项目:Supported by the National Key project of Scientific and Technical Supporting Programs of China under Grant No.2008BAH24B04 (国家“十一五”科技支撑计划); the Program for New Century Excellent Talents in University of China under Grant No.NCET-08-0738 (新世纪优秀人才支持计划); the Fundamental Research Funds for the Central Universities of China (重点高校基础研究基金); the Innovation Technology Star Program of Beijing of China under Grant No.2007A045 (北京创新科技新星计划) Supported by the National Key project of Scientific and Technical Supporting Programs of China under Grant No.2008BAH24B04 (国家“十一五”科技支撑计划); the Program for New Century Excellent Talents in University of China under Grant No.NCET-08-0738 (新世纪优秀人才支持计划); the Fundamental Research Funds for the Central Universities of China (重点高校基础研究基金); the Innovation Technology Star Program of Beijing of China under Grant No.2007A045 (北京创新科技新星计划)
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邱琳,宋美娜,宋俊德.OFDMA 协同网络中基于QoS 保证的资源分配算法.软件学报,2010,21(zk):341-348

QIU Lin,SONG Mei-Na,SONG Jun-De.QoS Aware Resource Allocation Algorithm in OFDMA Cooperative Network.Journal of Software,2010,21(zk):341-348