An improved frequency reuse algorithm for fixed two-hop OFDMA cellular relaying networks

Authors:
Min Liang;Ya Feng Wang;Fan Huang;Da Cheng Yang
Affiliations:
Beijing University of Posts and Telecommunications, Beijing, P. R. China;Beijing University of Posts and Telecommunications, Beijing, P. R. China;Beijing University of Posts and Telecommunications, Beijing, P. R. China;Beijing University of Posts and Telecommunications, Beijing, P. R. China
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

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Multihop Cellular Networks: Potential Gains, Research Challenges, and a Resource Allocation Framework

IEEE Communications Magazine

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Abstract

In this paper, we focus on the frequency reuse algorithms for the downlink of fixed two-hop Orthogonal Frequency Division Multiple Access (OFDMA) cellular relaying networks which operate in decode-and-forward and half-duplex mode. An Orthogonal Resource Allocation Algorithm (ORAA) has been proposed in [1]. After analyzing the co-channel interference and SINR of the ORAA, we propose a modified ORAA to improve the spectrum efficiency. Based on this scheme, co-channel interference and SINR are analyzed compared to the ORAA. In the theory analysis, a key design parameter is found and its optimal value is selected through the simulations. Intensive system-level simulation demonstrated the performance of the modified ORAA is superior to the ORAA remarkably.