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Proportional-Fair Downlink Resource Allocation in OFDMA-Based Relay Networks
Liu, Chang,Qin, Xiaowei,Zhang, Sihai,Zhou, Wuyang The Korea Institute of Information and Commucation 2011 Journal of communications and networks Vol.13 No.6
In this paper, we consider resource allocation with proportional fairness in the downlink orthogonal frequency division multiple access relay networks, in which relay nodes operate in decode-and-forward mode. A joint optimization problem is formulated for relay selection, subcarrier assignment and power allocation. Since the formulated primal problem is nondeterministic polynomial time-complete, we make continuous relaxation and solve the dual problem by Lagrangian dual decomposition method. A near-optimal solution is obtained using Karush-Kuhn-Tucker conditions. Simulation results show that the proposed algorithm provides superior system throughput and much better fairness among users comparing with a heuristic algorithm.
Proportional-Fair Downlink Resource Allocation in OFDMA-Based Relay Networks
Chang Liu,Xiaowei Qin,Sihai Zhang,Wuyang Zhou 한국통신학회 2011 Journal of communications and networks Vol.13 No.6
In this paper, we consider resource allocation with proportional fairness in the downlink orthogonal frequency division multiple access relay networks, in which relay nodes operate in decode-and-forward mode. A joint optimization problem is formulated for relay selection, subcarrier assignment and power allocation. Since the formulated primal problem is nondeterministic polynomial time-complete, we make continuous relaxation and solve the dual problem by Lagrangian dual decomposition method. A near-optimal solution is obtained using Karush-Kuhn-Tucker conditions. Simulation results show that the proposed algorithm provides superior system throughput and much better fairness among users comparing with a heuristic algorithm.