Achievable Rate of the Half-Duplex Multi-Hop Buffer-Aided Relay Channel With Block Fading

Jamali Kooshkghazi V, Zlatanov N, Shoukry H, Schober R (2015)

Publication Type: Journal article

Publication year: 2015

Journal

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

Book Volume: 14

Pages Range: 6240 - 6256

Journal Issue: 11

DOI: 10.1109/TWC.2015.2451171

Abstract

The half-duplex (HD) multi-hop relay channel consists of a source, multiple HD relays connected in series, and a destination where links are present only between adjacent nodes. In this paper, we focus on decode-and-forward relays and assume that the links are impaired by block fading and additive white Gaussian noise. We design a new protocol which, unlike the conventional protocols for the multi-hop relay channel, does not adhere to a fixed and predefined pattern of using the transmit, receive, and silent states of the nodes. In particular, the proposed protocol selects the optimal states of the nodes and the corresponding optimal transmission rates based on the instantaneous channel state information (CSI) of the involved links in each fading block such that the achievable average rate from source to destination is maximized. To enable adaptive scheduling of the states of the nodes, the relay nodes have to be equipped with buffers for temporary storage of the information received from the preceding node. Additionally, we discuss and address two practical challenges arising in the implementation of the optimal protocol, namely the unconstrained end-to-end delay due to data buffering at the relays and the required CSI overhead. Numerical results confirm the superiority of the proposed buffer-aided protocols compared to existing multi-hop relaying protocols.

Authors with CRIS profile

Vahid Jamali Kooshkghazi Lehrstuhl für Digitale Übertragung Hebatallah Shoukry Lehrstuhl für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Monash University AU Australia (AU)

How to cite

APA:

Jamali Kooshkghazi, V., Zlatanov, N., Shoukry, H., & Schober, R. (2015). Achievable Rate of the Half-Duplex Multi-Hop Buffer-Aided Relay Channel With Block Fading. IEEE Transactions on Wireless Communications, 14(11), 6240 - 6256. https://dx.doi.org/10.1109/TWC.2015.2451171

MLA:

Jamali Kooshkghazi, Vahid, et al. "Achievable Rate of the Half-Duplex Multi-Hop Buffer-Aided Relay Channel With Block Fading." IEEE Transactions on Wireless Communications 14.11 (2015): 6240 - 6256.

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