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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
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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 wordsMulticast      Single frequency networks (SFN)      Orthogonal frequency division multiplexing access (OFDMA)      Resource allocation     
Received: 27 April 2011      Published: 19 January 2012
CLC:  TN929.5  
Cite this article:

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


Resource allocation algorithm with limited feedback for multicast single frequency networks

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 
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