An Enhanced A-MSDU Frame Aggregation Scheme for 802.11n Wireless Networks

Saif, Anwar; Othman, Мohamed; Subramaniam, Shamala; Hamid, Nor Asilah Wati Abdul

doi:10.1007/s11277-011-0358-8

Cited by 53 publications

(19 citation statements)

References 10 publications

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“…The main goal of IEEE 802.11n is to provide a higher throughput rather than faster rates along with PHY and improvements of Medium Access Control (MAC) (Soni and Mendiratta, 2008;Xiao, 2005). Moreover, IEEE 802.11n provides many enhancements to reduce the overhead at MAC layer, such as: frame aggregation, Block Acknowledgment (BA) and reverse direction transmission (piggybacking ACK) (Saif et al, 2012) as shown in Fig. 6.…”

Section: Enhancements Of Ieee 80211nmentioning

confidence: 99%

Design a New Bidirectional Transmission Protocol to Improve the Performance of MAC Layer Based on Very High Speed WLANs

Milad¹,

Noh²,

Shibghatullah³

et al. 2015

Journal of Computer Science

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This paper presents a new bidirectional transmission protocol with single data frame to computing the performance of MAC layer based on IEEE 802.11n. As high as 600 Mbps of physical data rate is achieved in IEEE 802.11n where high data rate the current MAC layer leads to high performance overhead and low performance of throughput and designing the MAC layer still ongoing to achieve high performance throughput. In this study, a new bidirectional transmission protocol with single data frame has been proposed called BTDF bidirectional transmission data fragmentation, which is divided each data frame from sender to receiver and reverse into subframes and send each subframe, Packets those exceed the size threshold are divided into fragments also where the corrupted subframe will be retransmitted during the disruption of transmission. We have implemented this scheme in NS2 simulator to show the results for TCP and HDTV traffics and compared with literature.

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Section: Enhancements Of Ieee 80211nmentioning

confidence: 99%

Design a New Bidirectional Transmission Protocol to Improve the Performance of MAC Layer Based on Very High Speed WLANs

Milad¹,

Noh²,

Shibghatullah³

et al. 2015

Journal of Computer Science

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“…For various RCPC codes, a d and d f are tabulated in [29]. 7 The majority of previous C-PEP analyses for bitinterleaved coded (BIC) systems have been based on Caire's work in [32], where an expurgated bound (EB) was proposed to find the tight average BERs for AWGN or fading channels. However, the EB is not directly applicable to an instantaneous fading channel for the OFDM system in this paper because the received signal at each subcarrier normally exhibits a different channel response, i.e., a frequency-selective channel.…”

Section: Analytical Per For Convolutionally Coded Mimo-ofdm Systemsmentioning

confidence: 99%

“…Multiple MPDUs are aggregated and encapsulated to form a physical service data unit (PSDU) that is passed into the PHY layer [3]. The authors of [5], [6], and [7] have investigated the advantages and disadvantages of A-MSDU and A-MPDU formats. The advantage of the A-MSDU lies in its small overhead.…”

Section: Introductionmentioning

confidence: 99%

“…Recognizing the limitations of the A-MSDU in errorprone channels, two different approaches have been investigated in previous work: one is constructing additional frame structures and the other is adapting frame size. Aggregation with fragment retransmission (AFR) [4] and a minimized header A-MSDU (mA-MSDU) [7] provide a good survey of additional frame structures. However, the modified structure requires more headers and sequence controls, which again decreases efficiency and increases complexity, and may not be compliant with legacy standards.…”

Section: Introductionmentioning

confidence: 99%

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PHY-Supported Frame Aggregation for Wireless Local Area Networks

Shin¹,

Park²,

Kwon³

2013

IEEE Trans. on Mobile Comput.

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An aggregate medium access control (MAC) service data unit (A-MSDU) contains multiple subframes with a single sequence number. Hence, it has a major drawback in environments with high error rates because if any subframes are corrupted, then the entire A-MSDU will be lost. In addition, performance of the A-MSDU depends strongly on the choice of parameters, such as frame size, modulation level, coding rate, and spatial mode. In this paper, a novel link-adaptation mechanism, dubbed physical (PHY)-supported frame aggregation (PSFA), is proposed over IEEE 802.11 networks, and its performance is analyzed. The proposed PSFA technique is based on a cross-layer interaction that enables joint optimization of various parameters between the PHY and MAC layers. This paper derives a new packet error rate (PER) expression for convolutionally coded multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems as an example. Then, this PER expression is used to efficiently estimate the link quality, given the channel conditions and system parameters, and most importantly, it is able to facilitate a parametric study of the cross-layer interaction. In the proposed PSFA algorithm, we present a rule for selecting the parameters so that MAC throughput is maximized. It is shown analytically and verified using Monte Carlo simulations that this choice of parameters can improve throughput performance significantly and also ensure quality of service (QoS) requirements compared to existing conventional algorithms.

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“…This could be any failure to receive BAR and allows multiple aggregated frames to be acknowledged by a single BA. BA could be either expected immediately as a response to the BAR or could be a delayed BA [24] [25] [26]. Another medium access enhancement introduced in 802.11n is the reduced and zero inter-frame spacing (RIFS and ZIFS) to minimize the overhead between frames.…”

Section: Ieee 80211n Mac Enhancementsmentioning

confidence: 99%