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Power-Minimizing Resource Allocation in Multiuser Cooperative Relay Communications
Institute of Communication Technology, Ningbo University, Ningbo 315211, China
Institute of Communication Technology, Ningbo University, Ningbo 315211, China
Institute of Communication Technology, Ningbo University, Ningbo 315211, China
Institute of Communication Technology, Ningbo University, Ningbo 315211, China
Institute of Communication Technology, Ningbo University, Ningbo 315211, China
- 1 Institute of Communication Technology, Ningbo University, Ningbo 315211, China
- 2 Institute of Communication Technology, Ningbo University, Ningbo 315211, China
- 3 Institute of Communication Technology, Ningbo University, Ningbo 315211, China
- 4 Institute of Communication Technology, Ningbo University, Ningbo 315211, China
- 5 Institute of Communication Technology, Ningbo University, Ningbo 315211, China
Communications and Network·Volume 05 (2013)·Pages 48–52·Published 27 September 2013·DOI10.4236/cn.2013.53B2010
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Abstract
In this paper, we investigate the power-minimizing resource allocation problem in multiuser cooperative relay communication systems. A joint optimization problem involving subcarrier assignment, relay selection and power allocation is formulated. Since the problem cannot be solved directly, we decompose it into three subproblems. According to the equivalent channel gains and the target rates of users, the subcarrier assignment and relay selection are conducted. Motivated by the water-filling algorithm, we propose a power allocation algorithm with cooperative features. Simulations results indicate that the proposed algorithm performs better in terms of the total transmit power consumption than the existing algorithms.
KeywordsSubcarrier AssignmentRelay SelectionPower AllocationCooperative Features
- W. Shim, Y. Han and S. Kim, “Fairness-Aware Resource Allocation in a Cooperative OFDMA Uplink System,” IEEE Transactions on Vehicular Technology, Vol. 59, No. 2, 2010, pp. 932-939. doi:10.1109/TVT.2009.2037328
- Z. Shen, J. G. Andrews and B. L. Evans, “Adaptive Resource Allocation in Multiuser OFDM Systems with Proportional Rate Constraints,” IEEE Transactions on Wireless Communications, Vol. 4, No. 6, 2005, pp. 2726-2737. doi:10.1109/TWC.2005.858010
- H. X. Li, H. W. Luo, X. B. Wang and C. S. Li, “Throughput Maximization for OFDMA Cooperative Relay Networks with Fair Subchannel Allocation,” Wireless Communications and Networking Conference, Budapest, 5-8 April 2009, pp. 1-6.
- D. Kivanc, G. Q. Li and H. Liu, “Computationally Efficient Bandwidth Allocation and Power Control for OFDMA,” IEEE Transactions on Wireless Communications, Vol. 2, No. 6, 2003, pp. 1150-1158. doi:10.1109/TWC.2003.819016
- N. UL Hassan and M. Assaad, “Low Complexity Margin Adaptive Resource Allocation in Downlink MIMO-OFDMA System,” IEEE Transactions on Wireless Communications, Vol. 8, No. 7, 2009, pp. 3365-3371. doi:10.1109/TWC.2009.080210
- Y.-B. Lin, T.-H. Chiu and Y. T. Su, “Optimal and Near-Optimal Resource Allocation Algorithms for OFDMA Networks,” IEEE Transactions on Wireless Communications, Vol. 8, No. 8, 2009, pp. 4066-4077. doi:10.1109/TWC.2009.080221
- W. P. Tam, T. M. Lok and T. F. Wong, “Power-Minimizing Rate Allocation in Cooperative Uplink Systems,” IEEE Transactions on Vehicular Technology, Vol. 58, No. 9, 2009, pp. 4919-4929. doi:10.1109/TVT.2009.2027330
- S. Khakurel, L. Musavian and T. Le-Ngoc, “Energy-Efficient Resource and Power Allocation for Uplink Multi-User OFDM Systems,” IEEE 23rd International Symposium on Personal Indoor and Mobile Radio Communications, Sydney, 9-12 September 2012, pp. 357-361.
- H. Banizaman, S. M. T. Almodarresi and A. A. Tadaion, “Joint Subchannel-Relay Assignment and Bit Allocation for Multi-user Cooperative OFDMA Systems Based on Fairness,” The 18th Iranian Conference on Electrical Engineering, Isfahan, 11-13 May 2010, pp. 276-281.