Beamforming for Cooperative Retransmission via User Relaying in Multiple-Antenna Cellular Systems

Ryu JY, Choi W, Kim DI, Schober R (2014)

Publication Language: English

Publication Type: Journal article

Publication year: 2014

Journal

IEEE Transactions on Wireless Communications Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 14

Pages Range: 854-869

Journal Issue: 2

DOI: 10.1109/TWC.2014.2361136

Abstract

We propose a novel cooperative user relaying scheme for a two-user multiple-antenna downlink cellular system where each user has to receive a certain required amount of information. A user who successfully receives its required amount of information is supposed to help the other user in receiving its required amount of information through cooperative user relaying. For the proposed cooperative user relaying scheme, we jointly design linear beamformers at the base station over three transmission phases to minimize the total transmission time required for both users to receive their respective required amounts of information, which turn out to be approximated equivalent to the maximization of the sum throughput. In addition, considering a practical hybrid automatic repeat request (HARQ) protocol with user relaying, we modify the proposed scheme to minimize the required number of retransmissions. Our numerical results show that the proposed cooperative user relaying scheme achieves substantial gains over conventional transmission without user relaying in terms of both the average sum throughput and the transmission failure probability.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Korea Advanced Institute of Science and Technology (KAIST) KR Korea, Republic of (KR) Sungkyunkwan University (SKKU) KR Korea, Republic of (KR) Gyeongsang National University (GNU) / 경상대학교 KR Korea, Republic of (KR)

How to cite

APA:

Ryu, J.Y., Choi, W., Kim, D.I., & Schober, R. (2014). Beamforming for Cooperative Retransmission via User Relaying in Multiple-Antenna Cellular Systems. IEEE Transactions on Wireless Communications, 14(2), 854-869. https://doi.org/10.1109/TWC.2014.2361136

MLA:

Ryu, Jong Yeol, et al. "Beamforming for Cooperative Retransmission via User Relaying in Multiple-Antenna Cellular Systems." IEEE Transactions on Wireless Communications 14.2 (2014): 854-869.

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