Smart Hybrid-ARQ (SHARQ) for cooperative communication via distributed relays in LTE-advanced

Bhamri, Ankit; Kaltenberger, Florian; Knopp, Raymond; Hämäläinen, Jyri

doi:10.1109/spawc.2011.5990443

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…A crosslayer approach to design an adaptation scheme over the relay channel in the presence of HARQ is developed in [17] to enhance the system performance for data packet transmission over block-fading relay channels. In [18], two smart HARQ schemes with incremental redundancy were developed for a dual-hop network of two relays implementing cooperative communication. Motivated by the above suggestion, we investigate and analyze throughput efficient cooperative transmission techniques where both ARQ and relaying are jointly designed.…”

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confidence: 99%

Analysis of Outage Probability and Throughput for Half-Duplex Hybrid-ARQ Relay Channels

Maham

Behnad

Debbah

2012

IEEE Trans. Veh. Technol.

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Abstract-We consider a half-duplex wireless relay network with hybrid-automatic retransmission request (HARQ) and Rayleigh fading channels. In this paper, we analyze the average throughput and outage probability of the multi-relay delaylimited HARQ system with opportunistic relaying scheme in decode-and-forward mode, in which the best relay is selected to transmit the source's regenerated signal. A simple and distributed relay selection strategy is considered for multi-relay HARQ channels. Then, we utilize the non-orthogonal cooperative transmission between the source and selected relay for retransmitting of the source data toward the destination if needed, using spacetime codes. We analyze the performance of the system. We first derive the cumulative density function (CDF) and probability density function (PDF) of the selected relay HARQ channels. Then, the CDF and PDF are used to determine the exact outage probability in the l-th round of HARQ. The outage probability is required to compute the throughput-delay performance of this half-duplex opportunistic relaying protocol. The packet delay constraint is represented by L, the maximum number of HARQ rounds. An outage is declared if the packet is unsuccessful after L HARQ rounds. Furthermore, simple closed-form upper-bounds on outage probability are derived. Based on the derived upperbound expressions, it is shown that the proposed schemes achieve the full spatial diversity order of N + 1, where N is the number of potential relays. Our analytical results are confirmed by simulation results. In addition, simulation show that our proposed scheme can achieve higher average throughput compared to the direct transmission and conventional two-phase relay networks.

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confidence: 99%

Analysis of Outage Probability and Throughput for Half-Duplex Hybrid-ARQ Relay Channels

Maham

Behnad

Debbah

2012

IEEE Trans. Veh. Technol.

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“…Hybrid automatic repeat request (HARQ) technique, and particularly type-II hybrid ARQ that makes use of incremental redundancy [2], was proven to be particularly suited for wireless communication systems with appropriate feedback link [3]. Recently, HARQ protocol has been successfully incorporated into cooperative communications where retransmissions can be performed by the source or/and the relay [4][5][6][7][8][9]. In this case, the HARQ relay protocol based on the DF relay channel exploits two kinds of diversity: space diversity available via the relay node, and ARQ diversity.…”

Section: Introductionmentioning

confidence: 99%

Finite‐signal‐to‐noise ratio diversity‐multiplexing‐delay tradeoff in half‐duplex hybrid automatic repeat request relay channels

Farès

Langlais

2015

IET Communications

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In this paper, we consider a delay-limited hybrid automatic repeat request (HARQ) protocol that makes use of incremental redundancy over the three-node decode-and-forward (DF) relay fading channel where one source cooperates with a relay to transmit information to the destination. We provide an estimate of the diversity-multiplexing tradeoff (DMT) at finite signal to noise ratio (SNR) based on tight bounds on outage probabilities for two channel models. The results for the long term quasi-static channel highlight the distributed diversity, ie. the cooperative space diversity, and the HARQ coding gain, achieved by soft combining the successive transmitted punctured codewords via incremental redundancy. On the other hand, the results for the short term quasi-static channel illustrate the diversity gains obtained thanks to cooperative space diversity and time diversity, along with the HARQ coding gain. Using the DMT formulation, we show that equal power partitioning between the source and the relay nodes provides close to optimal performance. Furthermore, thanks to the extension of the finite-SNR DMT to the finite-SNR diversity-multiplexing-delay tradeoff, we show that, unlike the asymptotic SNR analysis, the ARQ delay, defined as the number of retransmissions rounds, impacts the performance of the HARQ relay protocol for high effective multiplexing gain.

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“…Cooperative communications with relay nodes have been recognized as one of effective and promising techniques in wireless/mobile communication systems. Relay standards are on the way to successful implementation in Long Term Evolution (LTE)-Advanced by the Third Generation Partnership Project (3GPP) and 802.16m by IEEE (Loa et al, 2010;Bhamri et al, 2011). Relay techniques have been enthusiastically investigated from the viewpoint of the physical (PHY) and data-link layers (Bhamri et al, 2011;Gómez-Cuba et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Random Relaying of Partitioned MDS Codeword Block Applied to Persistent Relay CSMA over Random Error Channels

Sakakibara

Taketsugu

2014

Proceedings of the 3rd International Conference on Sensor Networks

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We propose incorporation of Random relaying of Partitioned Maximum Distance Separable codeword blocks (RP-MDS), which has been proposed for multi-hop cooperative relay networks, to Persistent Relay Carrier Sense Multiple Access (PRCSMA) over noisy channels. The proposed protocol elaborately employs the powerful error-correcting capability of MDS codes into cooperative communication systems and introduces the incremental redundancy concept to PRCSMA. A destination node can reinforce an error-correcting capability when it receives a new frame. The performance of the proposed protocol is analyzed with a Markov model in terms of the average duration of a cooperation phase and the energy efficiency. Numerical results indicate that the proposed protocol can significantly improve the performance, compared to the original PRCSMA. 155Sakakibara K. and Taketsugu J.. Performance Analysis of Random Relaying of Partitioned MDS Codeword Block Applied to Persistent Relay CSMA over Random Error Channels.

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Smart Hybrid-ARQ (SHARQ) for cooperative communication via distributed relays in LTE-advanced

Cited by 7 publications

References 11 publications

Analysis of Outage Probability and Throughput for Half-Duplex Hybrid-ARQ Relay Channels

Analysis of Outage Probability and Throughput for Half-Duplex Hybrid-ARQ Relay Channels

Finite‐signal‐to‐noise ratio diversity‐multiplexing‐delay tradeoff in half‐duplex hybrid automatic repeat request relay channels

Performance Analysis of Random Relaying of Partitioned MDS Codeword Block Applied to Persistent Relay CSMA over Random Error Channels

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