Channel and queue aware joint relay selection and resource allocation for MISO-OFDMA based user-relay assisted cellular networks

İlhan Baştürk () and Berna Özbek
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İlhan Baştürk: İzmir Institute of Technology
Berna Özbek: İzmir Institute of Technology

Telecommunication Systems: Modelling, Analysis, Design and Management, 2018, vol. 67, issue 4, No 6, 619-633

Abstract: Abstract User-relay assisted orthogonal frequency division multiple access (OFDMA) networks are cost-effective solutions to meet the growing capacity and coverage demands of the next generation cellular networks. These networks can be used with multiple antennas technology in order to obtain a diversity gain to combat signal fading and to obtain more capacity gain without increasing the bandwidth or transmit power. Efficient relay selection and resource allocation are crucial in such a multi-user, multi-relay and multi-antenna environment to fully exploit the benefits of the combination of user-relaying and multiple antennas technology. Thus, we propose a channel and queue aware joint relay selection and resource allocation algorithm for multiple-input single-output (MISO)-OFDMA based user-relay assisted downlink cellular networks. Since, the proposed algorithm is not only channel but also queue-aware, the system resources are allocated efficiently among the users. The proposed algorithm for the MISO-OFDMA based user-relay assisted scheme is compared to existing MISO-OFDMA based non-relaying and fixed relay assisted schemes and it is also compared with the existing single-input single-output (SISO)-OFDMA based user-relay assisted scheme. Simulation results revealed that the proposed scheme outperforms the existing schemes in terms of cell-edge users’ total data rate, average backlog and average delay.

Keywords: User relaying; MISO-OFDMA; Relay selection; Resource allocation (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1007/s11235-017-0363-7

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