Improving Performance of Ieee 802.11 by a Dynamic Control Backoff Algorithm Under Unsaturated Traffic Loads

Alkadeki, Hatm; Wang, Xingang; Odetayo, Michael O.

doi:10.5121/ijwmn.2015.7605

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…The results show the higher retry limit offers high aggregated throughput in presence of hidden terminal. Alkadeki et al [15] proposed dynamic control backoff time algorithm (DCBTA) for CSMA/CA of IEEE 802.11 that outperforms BEB and ELBA when the network is in non-saturated state. An analytical model is developed for the per-node throughput analysis of IEEE 802.11 WLAN with hidden terminals by extending Bianchi's model in [16].…”

Section: Related Workmentioning

confidence: 99%

Effects of Mac Parameters on the Performance of IEEE 802.11 DCF in NS-3

Siddik¹,

Nitu²,

Natasha³

et al. 2021

IJWMN

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This paper presents the design procedure of the NS-3 script for WLAN that is organized according to the hierarchical manner of TCP/IP model. We configure all layers by using NS-3 model objects and set and modify the values used by objects to investigate the effects of MAC parameters (access mechanism, CWmin, CWmax and retry limit) on the performance metrics viz. packet delivery ratio, packet lost ratio, aggregated throughput, and average delay. The simulation results show that RTS/CTS access mechanism outperforms basic access mechanism in saturated state, whereas the MAC parameters have no significant impact on network performance in non-saturated state. A higher value of CWmin improves the aggregated throughput in expense of average delay. The tradeoff relationships among the performance metrics are also observed in results for the optimal values of MAC parameters. Our design procedure represents a good guideline for new NS-3 users to design and modify script and results greatly benefit the network design and management.

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Section: Related Workmentioning

confidence: 99%

Effects of Mac Parameters on the Performance of IEEE 802.11 DCF in NS-3

Siddik¹,

Nitu²,

Natasha³

et al. 2021

IJWMN

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“…The authors in Reference 23 presented a scheme called the dynamic control backoff time technique which is employed to handle the network's non‐saturated traffic load. The anticipated method used the CW‐Threshold as a reference value.…”

Section: Related Workmentioning

confidence: 99%

An energy‐efficient priority‐based packet scheduling mechanism for enhancing quality of service in mobile ad hoc network

Bhavadharini¹,

Karthik²,

Sabitha

2021

Concurrency and Computation

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In today's world, a mobile ad hoc network plays a predominant role for numerous applications such as education, entertainment, emergency services, tactical services, and home applications. The performance of IEEE 802.11 based wireless ad hoc networks degrades due to high contention for the shared medium among multiple ad hoc nodes.However, the shared medium can be accessed by multiple nodes, which causes link collisions and packet drop at the link level. These kinds of packet drops have a direct impact on the overall performance of the transmission control protocol (TCP). In this article, a new robust prioritized packet scheduling with adaptive backoff window (PPSAB) mechanism has been proposed to enhance the quality of service of TCP in the wireless scenario. In order to determine the congestion in the network, the proposed PPSAB mechanism anticipates the cross-layer parameters instead of transport layer parameters. The proposed access scheme assures minimized collisions and energy by setting the node level access to prevailing network parameters. The performance of the proposed PPSAB has been evaluated using an NS-2 environment and the results manifest that the normalized overhead is reduced by 20% and network throughput is increased by 17% than the existing methods. K E Y W O R D Senergy consumption, mobile ad hoc network, prioritized packet scheduling, quality of service INTRODUCTIONThe rapid development of wireless communication demands uninterrupted network connectivity among the communicating. Typically, mobile ad hoc network (MANET) is the collection of self-organizing and self-configuring mobile nodes which is not dependent on any stable and central coordinating infrastructure. The mobility of the nodes makes the topology of the network changes dynamically and the nodes may join and leave the network at any instance. 1 IEEE 802.11 ascertains single-hop reliability at medium access control (MAC) layer in MANETs.Two types of medium access techniques are generally utilized in IEEE 802.11. The first method, the distributed coordinated function enables the data flow among communicating devices while requiring no control infrastructure. Second, point coordinated function in which a central coordinator controls access to the shared wireless channel. 2,3 The basic channel access method exploited in distributed coordinated function is carrier sense multiple access collision and avoidance by the nodes. Every time, the shared channel is sensed by the node before data transmission and the node can transmit data if the medium is free or defer transmission until the medium becomes free.

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“…However, the above all algorithms focused on saturated traffic loads of wireless networks. Alkadeki et al (2016) worked on non-saturated traffic loads and proposed dynamic control backoff time algorithm, implemented using Equilibrium Point Analysis (EPA) model. In DCBTA, low or heavy traffic load is determined using CWthreshold value.…”

Section: Literature Reviewmentioning

confidence: 99%

Optimized tuning of contention window for IEEE 802.11 WLAN

Nithya¹,

Gopinath²,

Kameswaran³

et al. 2017

Int. J. Eng. Sci. Tech

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In wireless networks, the size of Contention Window (CW) plays a vital role as it changes the throughput and delay of the networks considerably. The proposed Collision Ratio based BackOff (CRBO) algorithm uses collision ratio to suggest CW updation after the successful and unsuccessful transmission events. This leads to proper scheduling of transmission when more than one node attempt to capture the shared medium. The strength of the proposed algorithm is analyzed using NS2 simulator in terms of throughput, delay, packet loss and fairness. The simulation results prove that the proposed algorithm outperforms the existing algorithms under heavy and low traffic in random and grid topology.

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Improving Performance of Ieee 802.11 by a Dynamic Control Backoff Algorithm Under Unsaturated Traffic Loads

Abstract: ABSTRACT

Cited by 11 publications

References 12 publications

Effects of Mac Parameters on the Performance of IEEE 802.11 DCF in NS-3

Effects of Mac Parameters on the Performance of IEEE 802.11 DCF in NS-3

An energy‐efficient priority‐based packet scheduling mechanism for enhancing quality of service in mobile ad hoc network

Optimized tuning of contention window for IEEE 802.11 WLAN

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