User Fairness Analysis of a Game Theory Based Power Allocation Scheme in OFDMA Relay Systems

Conference: European Wireless 2009 - 15th European Wireless Conference
05/17/2009 - 05/20/2009 at Aalborg, Denmark

Proceedings: European Wireless 2009

Pages: 5Language: englishTyp: PDF

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Xiao, Lin; Cuthbert, Laurie (Queen Mary University of London, Electronic Engineering and Computer Science, London, UK)
Zhang, Tiankui (Beijing University of Posts and Telecomms, School of Information and Communication Engineering, Beijing, PRC)

In this paper, the performance of user fairness of resource allocation is considered in the downlink of relay-based OFDMA cellular systems. In the downlink transparent frame structure, the base stations (BSs) transmit in the first time subslot and the relay stations (RSs) transmit in the second time subslot. A non-cooperative power allocation game is defined for maximizing throughput and reducing co-frequency interference. The distributed process of this game based power allocation scheme is given. Of particular interest in the results is the fairness seen by users and this is compared with equal power allocation, the simulation results showing that the reduced user fairness is worthwhile due to a great power saving.