A Novel Adaptive Contention Window Scheme for IEEE 802.11 MAC Protocol

Saraireh, Mohammad; Al-Saraire, Ja`afer; Saraireh, Saleh

doi:10.3923/tasr.2014.275.289

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…These results are also shown Figure 7. The average of QoS of proposed scheme increases from 50.1% to 83.5% for the high priority connections as compared with the standard, while it increases from 72.7% to 83.5% as compared with (Saraireh et al, 2014) for the high priority connections. For low priority, the average QoS is enhanced by 18.2% and 0.4% as compared with the standard and (Saraireh et al, 2014), respectively.…”

Section: Resultsmentioning

confidence: 88%

“…where f is a scaling factor, with value of 3 f = as considered in the simulations (Saraireh et al, 2014 To avoid starvation for low priority traffic, after each update of the DIFS, the adaptive approach examines the value of this parameter. If DIFS has high values.…”

Section: Proposed Approach Descriptionmentioning

confidence: 99%

“…The random transmission of applications over the wireless medium may lead to incomprehensible or unpredictable results [1]. Therefore, a controller, which manages access to the medium of the shared resources is an essential tool for achieving a successful transmission process between the communicating parties, and ensuring access is fair and suitable [2].…”

Section: Introductionmentioning

confidence: 99%

“…If the channel is busy, the node is waiting and monitoring the channel status until it is idle for a period of time called the DIFS. Then the node generates a random back-off interval before transmitting to minimize the probability of multiple nodes concurrently transmission [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adaptive Distributed Inter Frame Space for IEEE 802.11 MAC Protocol

Al-Saraireh¹,

Saraireh²,

Saraireh³

et al. 2014

Self Cite

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In this research, an Adaptive Distributed Inter Frame Space (ADIFS) has been proposed for IEEE 802.11 Medium Access Control (MAC) protocol. The aim of this approach is to improve Quality of Services (QoS) for IEEE 802.11 MAC protocol in single-hop wireless network. The proposed approach is based on traffic type, Collision Rate (CR), Collision Rate Variation (CRV) and Packet Loss Rate. These parameters are used to adjust the DIFS at runtime. The adjusted DIFS is employed to enhance service differentiation at the MAC layer in single-hop wireless networks. The proposed approach contributes to the enhancement of the average QoS for high priority traffic by 32.9% and 33.4% for the 5 and 10 connections, respectively. While the average QoS for the low priority traffic is improved by 14.3% and 18.2% for the 5 and 10 connections, respectively. The results indicate that, the proposed approach contributes in the enhancement of the QoS in wireless network.

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Section: Resultsmentioning

confidence: 88%

Section: Proposed Approach Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptive Distributed Inter Frame Space for IEEE 802.11 MAC Protocol

Al-Saraireh¹,

Saraireh²,

Saraireh³

et al. 2014

Self Cite

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“…Saraireh et al [16] employed an approach to improve IEEE 802.11 quality of service by fine-tuning the contention window dynamically. ToS (type of service) field of IP packet is used to classify high and low priority traffic.…”

Section: Related Workmentioning

confidence: 99%

Wireless Networking Performance in IoT Using Adaptive Contention Window

Bhavadharini

Karthik

Karthikeyan

et al. 2018

Wireless Communications and Mobile Computing

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Internet of Things (IoT) network contains heterogeneous resource-constrained computing devices which has its unique reputation in IoT environments. In spite of its distinctiveness, the network performance deteriorates by the distributed contention of the nodes for the shared wireless medium in IoT. In IoT network, the Medium Access Control (MAC) layer contention impacts the level of congestion at the transport layer. Further, the increasing node contention at the MAC layer increases link layer frame drops resulting in timeouts at the transport layer segments and the performance of TCP degrades. In addition to that, the expiration of maximum retransmission attempts and the high contentions drive the MAC retransmissions and the associated overheads to reduce the link level throughput and the packet delivery ratio. In order to deal with aforementioned problems, the Adaptive Contention Window (ACW) is proposed, which aims to reduce the MAC overhead and retransmissions by determining active queue size at the contending nodes and the energy level of the nodes to improve TCP performance. Further, the MAC contention window is adjusted according to the node's active queue size and the residual energy and TCP congestion window is dynamically adjusted based on the MAC contention window. Hence, by adjusting the MAC Adaptive Contention Window, the proposed model effectively distributes the access to medium and assures improved network throughput. Finally, the simulation study implemented through ns-2 is compared with an existing methodology such as Cross-Layer Congestion Control and dynamic window adaptation (CC-BADWA); the proposed model enhances the network throughput with the minimal collisions.

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