Analyzing delay limits of high-speed wireless ad hoc networks based on IEEE 802.11n

Gueguen

Trans. Emerging Tel. Tech.

et al. 2015

International audienceProviding Quality of Service (QoS) to real time applications over Wireless Local Area Networks (WLANs) is becoming a very challenging task due to the diversity of multimedia applications. Concurrently, there are numerous WLANs devices that are rising recently. Mainly, we focus on IEEE 802.11n since it was designed to support a high data transmission rate (toward 600 Mbps) based on frame aggregation schemes. The aggregation mechanism accumulates many frames before transmitting them into a single larger frame, thus reducing overhead and increasing efficiency and throughput. Yet, this scheme cannot provide QoS satisfaction for delay sensitive application even if it supports higher throughputs. Indeed, aggregation headers cause supplementary delays particularly when aggregating unfrequent packets with small sizes. To overcome this limitation, we propose in this paper a new Dynamic Frame Aggregation (DFA) scheduler to provide QoS satisfaction to real time services. To achieve this goal, we defined new scheduling parameters such as QoS delays to avoid accumulation of non-scheduled packets. Hence, the DFA scheduler serves packets and dynamically adjusts the aggregated frame size based on these QoS delays. Conducted simulations illustrate the performance of our proposed DFA scheduler in term of satisfying QoS, throughput, loss and delay requirements of voice and video traffics

Section: [33]mentioning

confidence: 91%

“…Authors in handle the weakness of 802.11 aggregation schemes by providing a detailed analysis of packet delay. They considered the packet delay as the amount of time separating the instant of generating this packet and the instant of successfully receiving it.…”

Section: Related Workmentioning

confidence: 99%

Dynamic frame aggregation scheduler for multimedia applications in IEEE 802.11n networks

Gueguen

Trans. Emerging Tel. Tech.

et al. 2015

“…On the other side, there are some others works that focused on proposing QoS mechanisms such as admission control to provide QoS satisfaction for real-time applications when using the aggregation mechanism. Authors in [15] handle with the weakness of 802.11 aggregation schemes by providing a detailed analysis of packet delay. They considered the packet delay as the amount of time separating the instant of generating this packet and the instant of successfully receiving it.…”

Section: Related Work and Motivationsmentioning

confidence: 99%

QoS support of voice/video services under IEEE 802.11n WLANs

2014 9th International Symposium on Communication Systems, Networks &Amp; Digital Sign (CSNDSP)

Kamoun

2014

IEEE 802.11n WLAN was mainly developed to support a high data transmission rate toward 600Mbps based on the aggregation scheme that accumulates several sub-frames to transmit them into a larger frame. This concept reduces overheads and increases efficiency and throughput. Nevertheless, it cannot provide QoS satisfaction for delay sensitive application since it badly affects the delay. To outperform this inefficiency, we have proposed an admission control mechanism named Adaptation of Frame Aggregation AFA-CAC. In this paper, we further investigate the performance of our proposed QoS mechanism on supporting real time applications particularly on audio and video services.

“…He shows that with retransmission policy, the video quality is improved without increasing the end‐to‐end delay. Authors in handle with the weakness of 802.11 aggregation schemes in term of delay, they presented a detailed analysis on packet delay that refers the amount of time separating the instant of generating this packet and the instant of successfully receiving it. They conducted that minimum packet delay can be granted with only a single aggregation size depending on the PHY rate while transmitting large aggregation frame size increases delay.…”

Section: Literature Overviewmentioning

confidence: 99%

New adaptive frame aggregation call admission control (AFA‐CAC) for high throughput WLANs

Trans Emerging Tel Tech

Kamoun

2013

The major enhancements introduced by the very high throughput wireless local area network, cannot provide quality of service (QoS) satisfaction for real time and multimedia applications. The recent standard IEEE 802.11n introduced new Medium Access Control (MAC) mechanisms based on aggregation scheme to enhance throughput. Besides that, functional modules for QoS provisioning such as call admission control and bandwidth management should be implemented in the access point. Hence, an efficient call admission control (CAC) algorithm is required for 802.11n network to satisfy QoS requirements of strict multimedia services. In this paper, we propose a new model‐based call admission control algorithm, called adaptation of frame aggregation AFA‐CAC to be implemented within the QoS access point in IEEE 802.11n standard in a way to provide QoS satisfaction to real time services. We first propose an accurate analytical model to estimate the achieved QoS metrics of a new flow entering in the network. Then, we detailed the AFA‐CAC algorithm that supports IEEE 802.11n aggregation schemes aggregated MAC service data unit and aggregated MAC protocol data unit and consider the IEEE 802.11e enhanced distributed channel access. AFA‐CAC is based on both predicting the QoS constraints of the already active flows and the new flow, and adjusting the number of aggregated subframes of each flow. Conducted simulations illustrate the performance of our proposed AFA‐CAC in terms of satisfying QoS throughput and end‐to‐end delay requirements of voice and video traffics. Copyright © 2013 John Wiley & Sons, Ltd.