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

Author

Listed:
  • İlhan Baştürk

    (İzmir Institute of Technology
    Adnan Menderes University)

  • Berna Özbek

    (İzmir Institute of Technology)

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.

Suggested Citation

  • İlhan Baştürk & Berna Özbek, 2018. "Channel and queue aware joint relay selection and resource allocation for MISO-OFDMA based user-relay assisted cellular networks," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 67(4), pages 619-633, April.
    • Handle: RePEc:spr:telsys:v:67:y:2018:i:4:d:10.1007_s11235-017-0363-7
    DOI: 10.1007/s11235-017-0363-7
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