Resource allocation algorithm with limited feedback for multicast single frequency networks 被引量：2

Resource allocation algorithm with limited feedback for multicast single frequency networks

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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. 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） require- ment 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.

作者 Ming-wei TANG Xiao-xiang WANG

机构地区 MOE Key Laboratory of Universal Wireless Communications

出处《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2012年第2期146-154,共9页 浙江大学学报C辑（计算机与电子（英文版）

基金 supported by the National Natural Science Foundation of China (Nos. 60972076 and 61072052) the National Science and Technology Major Project, China (No. 2010ZX03003-004-03)

关键词 MULTICAST Single frequency networks （SFN） Orthogonal frequency division multiplexing access （OFDMA） Resource allocation

分类号 TN93 [电子电信—信号与信息处理] TB123 [理学—工程力学]

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