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Front. Inform. Technol. Electron. Eng.  2012, Vol. 13 Issue (2): 146-154    DOI: 10.1631/jzus.C1100108
    
Resource allocation algorithm with limited feedback for multicast single frequency networks
Ming-wei Tang, Xiao-xiang Wang
MOE Key Laboratory of Universal Wireless Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
Resource allocation algorithm with limited feedback for multicast single frequency networks
Ming-wei Tang, Xiao-xiang Wang
MOE Key Laboratory of Universal Wireless Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
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摘要： The single frequency network (SFN) can provide a multimedia broadcast multicast service over a large coverage area. However, the application of SFN is still restricted by a large amount of feedback. Therefore, we propose a multicast resource allocation scheme based on limited feedback to maximize the total rate while guaranteeing the quality of service (QoS) requirement of real-time services. In this scheme, we design a user feedback control algorithm to effectively reduce feedback load. The algorithm determines to which base stations the users should report channel state information. We then formulate a joint subcarrier and power allocation issue and find that it has high complexity. Hence, we first distribute subcarriers under the assumption of equal power and develop a proportional allocation strategy to achieve a tradeoff between fairness and QoS. Next, an iterative water-filling power allocation is proposed to fully utilize the limited power. To further decrease complexity, a power iterative scheme is introduced. Simulation results show that the proposed scheme significantly improves system performance while reducing 68% of the feedback overhead. In addition, the power iterative strategy is suitable in practice due to low complexity.
关键词： Multicast;  Single frequency networks (SFN);  Orthogonal frequency division multiplexing access (OFDMA);  Resource allocation    
Abstract: The single frequency network (SFN) can provide a multimedia broadcast multicast service over a large coverage area. However, the application of SFN is still restricted by a large amount of feedback. Therefore, we propose a multicast resource allocation scheme based on limited feedback to maximize the total rate while guaranteeing the quality of service (QoS) requirement of real-time services. In this scheme, we design a user feedback control algorithm to effectively reduce feedback load. The algorithm determines to which base stations the users should report channel state information. We then formulate a joint subcarrier and power allocation issue and find that it has high complexity. Hence, we first distribute subcarriers under the assumption of equal power and develop a proportional allocation strategy to achieve a tradeoff between fairness and QoS. Next, an iterative water-filling power allocation is proposed to fully utilize the limited power. To further decrease complexity, a power iterative scheme is introduced. Simulation results show that the proposed scheme significantly improves system performance while reducing 68% of the feedback overhead. In addition, the power iterative strategy is suitable in practice due to low complexity.
Key words: Multicast    Single frequency networks (SFN)    Orthogonal frequency division multiplexing access (OFDMA)    Resource allocation
收稿日期: 2011-04-27 出版日期: 2012-01-19
CLC:  TN929.5  
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引用本文:

Ming-wei Tang, Xiao-xiang Wang. Resource allocation algorithm with limited feedback for multicast single frequency networks. Front. Inform. Technol. Electron. Eng., 2012, 13(2): 146-154.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1100108    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2012/V13/I2/146

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