Joint Scheduling and Power Allocation in OFDMA Network with Decode-and-Forward Relaying

Abstract:

This paper investigates the resource allocation of Orthogonal Frequency Division Multiplexing Access (OFDMA) cellular network with DF relaying in the downlink. A joint scheme of relay selection, subcarrier assignment and power allocation is proposed to maximize the system sum rate subject to individual power constraints and heterogeneous users' rate requirements. Since the original problem is a mixed integer programming (MIP), we transform it to a standard convex optimization by continuous relaxation and solve it via iterative water-filling (IWF) and subgradient methods in the dual domain. Beside the joint scheme, the upper bound is studied through an exhaustive bisection search. Simulations results show that the proposed scheme outperforms the traditional methods in terms of both system throughput and users' satisfactions.

• Periodical: Applied Mechanics and Materials (Volumes 236-237)
• Pages: 1038-1043
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.236-237.1038
• Online since: November 2012
• Authors: Lin Shu Lv, Qi Zhu
• Keywords: DF Relaying, Heterogeneous Users, Joint Resource Allocation, OFDMA

References

[1] C.N. Hsu, H.J. Su, P.H. Lin. Joint Subcarrier Pairing and Power Allocation for OFDM Transmission With Decode-and-Forward Relaying. IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 59, NO. 1, 2011, pp.399-414.

DOI: 10.1109/tsp.2010.2081982

[2] Y. Liu, W. Chen, and X. Huang. Capacity Based Adaptive Power Allocation for the OFDM Relay Networks with Limited Feedback. IEEE International Conference on Communications, 2011, pp.1-5.

DOI: 10.1109/icc.2011.5962465

[3] Y.U. Jang, E.R. Jeong and Y.H. Lee. A Two-Step Approach to Power Allocation for OFDM Signals Over Two-Way Amplify-and-Forward Relay. IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 58, NO. 4, 2010, pp.2426-2430.

DOI: 10.1109/tsp.2010.2040415

[4] T. Wang, L. Vandendorpe. Sum Rate Maximized Resource Allocation in Multiple DF Relays Aided OFDM Transmission. IEEE JOURNAL ON SELECTED AREAS IN COMMUNI CATIONS, VOL. 29, NO. 8, 2011. 1559-1571.

DOI: 10.1109/jsac.2011.110906

[5] T. Riihonen, S. Werner and R. Wichman. Hypoexponential Power–Delay Profile and Performance of Multihop OFDM Relay Links. IEEE TRANSACTIONS ON WIRELESS COMM UNICATIONS, VOL. 9, NO. 12, 2010, pp.3878-3888.

DOI: 10.1109/twc.2010.101310.100250

[6] N. Zhou, X. Zhu, Y. Huang, H. Lin. Adaptive Resource Allocation for Multi-Destination Relay Systems Based on OFDM Modulation. IEEE International Conference on Communications, 2009, pp.1-5.

DOI: 10.1109/icc.2009.5198707

[7] Y. Pan, A. Nix, and M. Beach. Distributed Resource Allocation for OFDMA-Based Relay Networks. IEEE Transactions On Vehicular Technology, vol. 60, no. 3, 2011, pp.919-931.

DOI: 10.1109/tvt.2011.2107925

[8] Y. Hua, Q. Zhang, and Z. Niu. Resource Allocation in Multi-cell OFDMA-based Relay Networks. INFOCOM, 2010 Proceedings IEEE, pp.1-9.

DOI: 10.1109/infcom.2010.5462037

[9] L. Wang, Y. Ji, and F. Liu. Joint Optimization for Proportional Fairness in OFDMA Relay-Enhanced Cellular Networks. Wireless Communications and Networking Conference, 2010, pp.1-6.

DOI: 10.1109/wcnc.2010.5506125

[10] D. Zhang, Y. Wang, J. Lu. QoS Aware Resource Allocation in Cooperative OFDMA Systems with Service Differentiation. IEEE International Conference on Communications, 2010, pp.1-5.

DOI: 10.1109/icc.2010.5501929