Cross-Layer Design of Enhanced AMC with Truncated ARQ Protocols

Qi, Jian; Aı̈ssa, Sonia

doi:10.1109/glocom.2007.636

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…As in [11], we define the average spectral efficiency as the average number of accepted information bits per transmitted symbol. The next Proposition presents an exact closed-form expression for the average SE of the proposed scheme.…”

Section: Spectral Efficiency Performancementioning

confidence: 99%

Cross-layer link adaptation design for relay channels with cooperative ARQ protocol

Mardani

Harsini

Lahouti

2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications

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The cooperative automatic repeat request (C-ARQ) is a link layer relaying protocol which exploits the spatial diversity and allows the relay node to retransmit the source data packet to the destination, when the latter is unable to decode the source data correctly. This paper presents a cross-layer link adaptation design for C-ARQ based relay channels in which both source and relay nodes employ adaptive modulation coding and power adaptation at the physical layer. For this scenario, we first derive closed-form expressions for the system spectral efficiency and average power consumption. We then present a low complexity iterative algorithm to find the optimized adaptation solution by maximizing the spectral efficiency subject to a packet loss rate (PLR) and an average power consumption constraint. The results indicate that the proposed adaptation scheme enhances the spectral efficiency noticeably when compared to other adaptive schemes, while guaranteeing the required PLR performance.

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Section: Spectral Efficiency Performancementioning

confidence: 99%

Cross-layer link adaptation design for relay channels with cooperative ARQ protocol

Mardani

Harsini

Lahouti

2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications

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“…The corresponding AM algorithms guarantee that the maximum allowed PLR, max , is not exceeded, but remain suboptimal and also yield poor performance when used in conjunction with packet combining. To illustrate this, we proceed 4 For clarity, expressions in [1] and [3] are shown using our notations. with numerical simulations and discuss the performance of the proposed AM algorithm in comparison to those in [1] and [3].…”

Section: Performance Evaluation and Discussionmentioning

confidence: 99%

“…As such, the average DoI in this case is equivalent to the average PER. 4 The AM intervals [ , +1 ), = 1, . .…”

Section: Performance Evaluation and Discussionmentioning

confidence: 99%

Cross-Layer Designed Adaptive Modulation Algorithm with Packet Combining and Truncated ARQ over MIMO Nakagami Fading Channels

Aniba

Aı̈ssa

2011

IEEE Trans. Wireless Commun.

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This paper presents an optimal adaptive modulation (AM) algorithm designed using a cross-layer approach which combines truncated automatic repeat request (ARQ) protocol and packet combining. Transmissions are performed over multiple-input multiple-output (MIMO) Nakagami fading channels, and retransmitted packets are not necessarily modulated using the same modulation format as in the initial transmission. Compared to traditional approach, cross-layer design based on the coupling across the physical and link layers, has proven to yield better performance in wireless communications. However, there is a lack for the performance analysis and evaluation of such design when the ARQ protocol is used in conjunction with packet combining. Indeed, previous works addressed the link layer performance of AM with truncated ARQ but without packet combining. In addition, previously proposed AM algorithms are not optimal and can provide poor performance when packet combining is implemented. Herein, we first show that the packet loss rate (PLR) resulting from the combining of packets modulated with different constellations can be well approximated by an exponential function. This model is then used in the design of an optimal AM algorithm for systems employing packet combining, truncated ARQ and MIMO antenna configurations, considering transmission over Nakagami fading channels. Numerical results are provided for operation with or without packet combining, and show the enhanced performance and efficiency of the proposed algorithm in comparison with existing ones.

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Cross‐layer design for MIMO systems over spatially correlated and keyhole Nakagami‐m fading channels

Aı̈ssa

Maaref

2010

Wireless Communications

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Cross‐layer design is a generic designation for a set of efficient adaptive transmission schemes, across multiple layers of the protocol stack, that are aimed at enhancing the spectral efficiency and increasing the transmission reliability of wireless communication systems. In this paper, one such cross‐layer design scheme that combines physical layer adaptive modulation and coding (AMC) with link layer truncated automatic repeat request (T‐ARQ) is proposed for multiple‐input multiple‐output (MIMO) systems employing orthogonal space‐‐time block coding (OSTBC). The performance of the proposed cross‐layer design is evaluated in terms of achievable average spectral efficiency (ASE), average packet loss rate (PLR) and outage probability, for which analytical expressions are derived, considering transmission over two types of MIMO fading channels, namely, spatially correlated Nakagami‐m fading channels and keyhole Nakagami‐m fading channels. Furthermore, the effects of the maximum number of ARQ retransmissions, numbers of transmit and receive antennas, Nakagami fading parameter and spatial correlation parameters, are studied and discussed based on numerical results and comparisons. Copyright © 2009 John Wiley & Sons, Ltd.

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Cross-Layer Design of Enhanced AMC with Truncated ARQ Protocols

Cited by 8 publications

References 7 publications

Cross-layer link adaptation design for relay channels with cooperative ARQ protocol

Cross-layer link adaptation design for relay channels with cooperative ARQ protocol

Cross-Layer Designed Adaptive Modulation Algorithm with Packet Combining and Truncated ARQ over MIMO Nakagami Fading Channels

Cross‐layer design for MIMO systems over spatially correlated and keyhole Nakagami‐m fading channels

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