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Utility-based adaptive radio resource allocation in OFDM wireless networks with traffic prioritization

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3 Author(s)
Katoozian, M. ; ECE Dept., Tarbiat Modares Univ., Tehran ; Navaie, K. ; Yanikomeroglu, H.

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.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:8 ,  Issue: 1 )

Date of Publication:

Jan. 2009

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