Researchers in both academia and industry have accepted OFDMA as the most appropriate air-interface for the emerging broadband wireless access networks and standards. A number of IEEE working groups and various research forums are focusing on developing relay and mesh-enabled networks with cooperative communication features. Among these research efforts are IEEE 802.11s, IEEE 802.16j/m, and 3GPP's advanced long term evolution (LTE-advanced). The combination of OFDMA with relaying techniques provides rich opportunities for cost-effective and high-performance networks. To exploit such opportunities requires intelligent radio resource management (RRM) algorithms. Although a number of publications have highlighted the important and challenging issues involved in designing RRM algorithms for OFDMA networks, only recently a number of papers have investigated relay-enhanced OFDMA-based multicellular networks. By and large, the literature indicates that these issues constitute a hot research topic that will continue to attract interest. This paper provides a survey of the current literature on OFDMA networks enhanced with decode-and-forward relaying and provides their link to earlier literature in non-OFDMA networks. In addition, a rich list of references is provided to direct the readers toward some of the emerging techniques.

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Keywords 4G, fairness, OFDMA, relaying, RRM, scheduling, throughput
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Journal IEEE Communications Surveys and Tutorials
Salem, M. (Mohamed), Adinoyi, A. (Abdulkareem), Rahman, M. (Mahmudur), Yanikömeroǧlu, H, Falconer, D.D, Kim, Y.-D. (Young-Doo), … Cheong, Y.-C. (Yoon-Chae). (2010). An overview of radio resource management in relay-enhanced OFDMA-based networks. IEEE Communications Surveys and Tutorials, 12(3), 422–438. doi:10.1109/SURV.2010.032210.00071