Dynamic 20/40/60/80 MHz Channel Access for 80 MHz 802.11ac

Stelter, Andrzej; Szulakiewicz, P.; Kotrys, Robert; Krasicki, Maciej; Remlein, Piotr

doi:10.1007/s11277-014-1851-7

Cited by 12 publications

(6 citation statements)

References 3 publications

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“…The four main enhancements at the PHY layer are the use of 256-QAM, down link multiuser MIMO, up to eight antennas and supports (i 20, i40, 80 and 160 MHz) channels bandwidth [4]. The IEEE 802.11ac supports MIMO with OFDM to increase channel capacity and allows maximum data rates of 693 (1×1 SS) and 6240 (8×8 SS) Mbps [14], [15].…”

Section: Research Methods and Materialsmentioning

confidence: 99%

On the evaluation of the IEEE 802.11ac WLAN performance with QoS deployment

Farej

Ali

2021

IJEECS

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The increase in the number of users on wireless local area networks (WLAN) and the development of large size applications have increased the demand for high-speed data rate and low latency. The IEEE 802.11ac was developed to provide very high throughput WLANs. Many enhancements are added to the medium access control (MAC) and physical (PHY) layers to increase data rate and improve network performance, these features enable the IEEE 802.11ac standard to provide quality of service (QoS) for multimedia applications. This paper concentrates on the impact of QoS on the system performance in term of delay and throughput. Four scenarios are proposed to investigate the network performance with different (from 1 up to 8) spatial stream (SS). The objective modular network testbed in C++ (OMNet++ modeler v5.5.1) is used to simulate and model these scenarios. For 8×8 SS, the results of simulation show the best throughput (maximum) and delay (minimum) values of (622, 484, 399.3, 382.96 Mbps) and (0.0211, 0.0589, 0.1037, 0.1202 sec) for 5, 15, 30 and 45 node number scenarios respectively. Although the number of nodes increases, the system performance decreases, however when QoS is deployed the performance is enhanced and its best improvement is obtained at the highest (45) node number scenario with values of 94.4% and 56.1% for throughput and delay respectively.

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Section: Research Methods and Materialsmentioning

confidence: 99%

On the evaluation of the IEEE 802.11ac WLAN performance with QoS deployment

Farej

Ali

2021

IJEECS

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“…This approach attempts to reduce the performance of bottleneck and scalability problems. Stelter et al [15] designed a dynamic channel access mechanism for IEEE 802.11acbased networks by employing the CCA functionality. Authors in [17] investigate the performance of the dynamic bandwidth channel access operation in IEEE 802.11ac.…”

Section: Existing Approaches and Their Limitationsmentioning

confidence: 99%

“…(ii) Average rate of throughput decrement due to the decrease of DAP: From Fig. 3(b), it can be observed that, for any k stations, with k = [5,10,15,20,25,30], the rate of throughput decrement is the highest when the DAP is reduced to 80m from 160m. As the DAP decreases, the chances of getting inside of the coverage area of the IR of an STA become higher for an AP.…”

Section: Pilot Studymentioning

confidence: 99%

IBAC: An Intelligent Dynamic Bandwidth Channel Access Avoiding Outside Warning Range Problem

Karmakar,

Kaddoum

2022

Preprint

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IEEE 802.11ax uses the concept of primary and secondary channels, leading to the Dynamic Bandwidth Channel Access (DBCA) mechanism. By applying DBCA, a wireless station can select a wider channel bandwidth, such as 40/80/160 MHz, by applying the channel bonding feature. However, during channel bonding, inappropriate bandwidth selection can cause collisions. Therefore, to avoid collisions, a well-developed media access control (MAC) protocol is crucial to effectively utilize the channel bonding mechanism. In this paper, we address a collision scenario, called Outside Warning Range Problem (OWRP), that may occur during DBCA when a wireless station interferes with another wireless station after channel bonding is performed. Therefore, we propose a MAC layer mechanism, Intelligent Bonding Avoiding Collision (IBAC), that adapts the channel bonding level in DBCA in order to avoid the OWRP. We first design a theoretical model based on Markov chains for DBCA while avoiding the OWRP. Based on this model, we design a Thompson sampling based Bayesian approach to select the best possible channel bonding level intelligently. We analyze the performance of the IBAC through simulations where it is observed that, comparing to other competing mechanisms, the proposed approach can enhance the network performance significantly while avoiding the OWRP.

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“…Since most previous works addressed the spectral underutilization efficiency problem [9,10], here we present related studies that are most relevant to multichannel access schemes [10][11][12][13][14]. The channel bonding technique has been proposed to work on one wide channel rather than multichannel access because it increases the data rate and supports the high speed of IEEE 802.11 communications.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The use of channel bonding increases delay and resource consumption according to [14,20,21]. Dynamic multichannel access has been proposed to overcome these problems.…”

Section: Literature Reviewmentioning

confidence: 99%

An Adaptive Common Control Channel MAC with Transmission Opportunity in IEEE 802.11ac

Alsufyani¹,

Almotairi²

2021

J. ICT Res. Appl.

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Spectral utilization is a major challenge in wireless ad hoc networks due in part to using limited network resources. For ad hoc networks, the bandwidth is shared among stations that can transmit data at any point in time. It Â is important to maximize the throughput to enhance the network service. In this paper, we propose an adaptive multi-channel access with transmission opportunity protocol for multi-channel ad hoc networks, called AMCA-TXOP. For the purpose of coordination, the proposed protocol uses an adaptive common control channel over which the stations negotiate their channel selection based on the entire available bandwidth and then switch to the negotiated channel. AMCA-TXOP requires a single radio interface so that each station can listen to the control channel, which can overhear all agreements made by the other stations. This allows parallel transmission to multiple stations over various channels, prioritizing data traffic to achieve the quality-of-service requirements. The proposed approach can work with the 802.11ac protocol, which has expanded the bandwidth to 160 MHz by channel bonding. Simulations were conducted to demonstrate the throughput gains that can be achieved using the AMCA-TXOP protocol. Moreover, we compared our protocol with Â the IEEE 802.11ac standard protocols.

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Dynamic 20/40/60/80 MHz Channel Access for 80 MHz 802.11ac

Cited by 12 publications

References 3 publications

On the evaluation of the IEEE 802.11ac WLAN performance with QoS deployment

On the evaluation of the IEEE 802.11ac WLAN performance with QoS deployment

IBAC: An Intelligent Dynamic Bandwidth Channel Access Avoiding Outside Warning Range Problem

An Adaptive Common Control Channel MAC with Transmission Opportunity in IEEE 802.11ac

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