An Efficient Resource Allocation Algorithm for Multicast Orthogonal Frequency Division Multiplexing Systems

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An Efficient Resource Allocation Algorithm for Multicast Orthogonal Frequency Division Multiplexing Systems

更新时间：2025-07-09

- An Efficient Resource Allocation Algorithm for Multicast Orthogonal Frequency Division Multiplexing Systems
- Vol. 45, Issue 10, Pages: 38-42(2011)
- 作者机构：
  
  1. 实验室,北京,100876
  2. 安徽省计算与通讯软件重点实验室,合肥,230027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP393
- Online First：10 October 2011，
  
  Published：2011
- 稿件说明：
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An Efficient Resource Allocation Algorithm for Multicast Orthogonal Frequency Division Multiplexing Systems[J]. 2011, 45(10): 38-42.
DOI：

An Efficient Resource Allocation Algorithm for Multicast Orthogonal Frequency Division Multiplexing Systems[J]. 2011, 45(10): 38-42. DOI：

摘要

针对现有正交频分复用系统采用多播资源分配算法时效率较低的问题

提出了一种多重描述编码的多播资源分配算法.首先将系统的功率划分为等长的基本分配单元

之后使用动态规划算法计算每个子载波上的功率分配和用户分配.该算法可以从全局进行子载波分配和功率分配

从而提高了资源分配的效率

实现了系统总吞吐率的最大化.由于不需要重复计算相同子问题

因此算法能在很短的时间内完成资源的分配计算.仿真结果表明

所提动态规划算法可以有效地利用系统资源

使得系统总吞吐率与最优算法计算结果之差小于2%.

Abstract

A resource allocation algorithm based on dynamic programming is proposed to improve the performance of resource allocation for multicast systems of OFDM(orthogonal frequency division multiplexing). The algorithm tries to find the maximum total capacity of the system using the dynamic programming in a global manner after partitioning the available resources into scheduable equal units. Since there is no repeated calculation for sub-problems

the complexity of the algorithm is reduced. Simulation results show that the difference of the total system capacity between the proposed algorithm and the optimal algorithm is within 2%.

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Keywords

references

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SUH C H, HWANG C S. Dynamic subchannel and bit allocation multicast OFDM systems[C]∥15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. Piscataway, NJ, USA: IEEE, 2004: 2102-2106.

SUH C H, MO J H. Resource allocation for multicast services in multicarrier wireless communication[J]. IEEE Transactions on Wireless Communications, 2008, 7(1): 27-31.

LIU Juan, CHEN Wei, CAO Zhigang, et al. Dynamic power and sub-carrier allocation for OFDMA-based wireless multicast systems[C]∥2008 IEEE International Conference on Communications. Piscataway, NJ, USA: IEEE, 2008: 2607-2611.

BAKANOGLU K, WU Mingquan, LIU Hang, et al. Adaptive resource allocation in multicast OFDMA systems[C/OL]∥2010 IEEE Wireless Communications and Networking Conference. Piscataway, NJ, USA: IEEE. [2010-01-12]. http:∥ieeexplore. ieee.org/xpls/abs_all.jsp?arnumber=5506213.

TIAN Lin, PANG Di, YANG Yubo, et al. Subcarrier allocation for multicast services in multicarrier wireless systems with QoS guarantees[C/OL]∥2010 IEEE Wireless Communications and Networking Conference. Piscataway, NJ,USA: IEEE. [2010-01-12]. http:∥ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5506421.

SHEN Jun, YI Na,WU Bo, et al. A greedy-based resource allocation algorithm for multicast and unicast services in OFDM system [C]∥International Conference on Wireless Communications and Signal Processing. Piscataway, NJ, USA: IEEE, 2009:1-5.

ZHANG Dongmei, XU Youyun, CAI Yueming. High efficiency algorithm of power and bit allocation for OFDMA system [J]. Journal on Communications, 2008, 29(4):108-113.

GOLDSMITH A J, CHUA S G. Variable-rate variable-power MQAM for fading channels[J]. IEEE Transactions on Communications, 1997, 45(10):1218-1230.

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