In this letter, a joint transmit scheduling and dynamic sub-carrier and power allocation method is proposed to exploit multi-user diversity in downlink packet transmission in an OFDM wireless network with mixed real-time and non-real-time traffic patterns. To balance efficiency and fairness and to satisfy the QoS requirements of real-time users, we utilize a utility-based framework and propose a polynomial-time heuristic algorithm to solve the formulated optimization problem. The distinguishing feature of the proposed method is that it gives in one shot, the transmission scheduling, the sub-carriers assigned to each user, and the power allocated to each sub-carrier, based on a fair and efficient framework while satisfying the delay requirements of real-time users.

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Keywords Fairness, Multi-user diversity, OFDM networks, Radio resource allocation, Utility function
Persistent URL
Journal IEEE Transactions on Wireless Communications
Katoozian, M. (Mohammad), Navaie, K. (Keivan), & Yanikomeroglu, H. (2009). Utility-based adaptive radio resource allocation in OFDM wireless networks with traffic prioritization. IEEE Transactions on Wireless Communications, 8(1), 66–71. doi:10.1109/T-WC.2009.080033