Analysis of Combined Buffering and Retransmission with Maintenance Activity in OBS Networks

Vanitha, D. Veera; Sumitha, D.; Sabrigiriraj, M.

doi:10.1109/icctct.2018.8550882

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…The importance of the burst loss ratio was studied in [9]. This paper studies a new method that is a combination of buffering and retransmission to solve the contention problem in order to decrease the value of BLR in the network.…”

Section: Work Relatedmentioning

confidence: 99%

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An improvement over TCP Vegas to enhance its performance in optical burst switching networks

Poorzare

Calveras

Abedidarabad

2021

Opt Rev

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The demand for high bandwidth on the Internet is growing drastically, and one of the solutions for tackling this problem is using optical networks. Burst switching is one of the techniques that can be used in optical networks to handle high traffic. Aside from many advantages that this technique has, it suffers from a big flaw called burst contention. Optical Burst Switching (OBS) is a switching technique without any buffering system. As a result, when two bursts are trying to reserve one resource, one of them drops. This drawback can have a significant impact on the performance of some protocols like TCP because they have not been designed to perform in a network without any queuing system and cannot distinguish a drop is because of the congestion or contention. In this paper, a new algorithm called AVGR (Average of RTTs) is proposed based on some mathematical equations to prevent the degradation of TCP. It tries to calculate averages for some RTTs in three different periods. Then base on the obtained results, the congestion control mechanism will be modified. The primary goal of the algorithm is to determine the current status of the network and make proper decisions based on it.

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Section: Work Relatedmentioning

confidence: 99%

“…Researchers have done much studying on this issue to improve the performance of optical networks running under protocols like TCP. A large number of previous enhancements have modified TCP or OBS to adapt them to optical networks [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

An improvement over TCP Vegas to enhance its performance in optical burst switching networks

Poorzare

Calveras

Abedidarabad

2021

Opt Rev

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“…Numerical results show the effect of impatience and link failure on the number of processed bursts in the network. An extension of this model was also considered and evaluated to examine the effect of maintenance activity and buffer search of the server on the bursts being processed in the network [15].…”

Section: Related Workmentioning

confidence: 99%

Modeling of a controlled retransmission scheme for loss recovery in optical burst switching networks

et al. 2021

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Retransmission in optical burst switching networks is a solution to recover data loss by retransmitting the dropped burst. The ingress node temporarily stores a copy of the complete burst and sends it each time it receives a retransmission request from the core node. Some retransmission schemes have been suggested, but uncontrolled retransmission often increases the network load, consumes more bandwidth, and consequently, increases the probability of contention. Controlled retransmission is therefore essential. This paper proposes a new controlled retransmission scheme for loss recovery, where the available bandwidth of wavelength channels and the burst lifetime are referred to as network conditions to determine whether to transmit a dropped burst. A retrial queue‐based analysis model is also constructed to validate the proposed retransmission scheme. The simulation and analysis results show that the controlled retransmission scheme is more efficient than the previously suggested schemes regarding byte loss probability, successful retransmission rate, and network throughput.

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A Novel Implementation of TCP Vegas by UsingA Fuzzy-Threshold Base Algorithm to Improve Performance of Optical Networks

Poorzare

Abedidarabad

2018

Journal of Optical Communications

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There is a misunderstanding in Optical Burst Switching (OBS) networks about the congestion status in the network that can cause a reduction in the performance of the networks. OBS networks are bufferless in their nature so when a burst drop happens in the network it can be because of the congestion or contention in the network but TCP cannot distinguish it is due to the congestion or contention. TCP wrongly decreases the congestion window size (cwnd) and causes significant reduction of the network performance. In this paper we are trying to employ a new algorithm by using fuzzy logic and some thresholds to divide the network into several areas then we can solve the problem. This new scheme can help us to distinguish a burst drop is because of the congestion or a burst contention in the network. Extensive simulative studies show that the proposed algorithm outperforms TCP Vegas in terms of throughput and packet delivery count.

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Analysis of Combined Buffering and Retransmission with Maintenance Activity in OBS Networks

Cited by 5 publications

References 11 publications

An improvement over TCP Vegas to enhance its performance in optical burst switching networks

An improvement over TCP Vegas to enhance its performance in optical burst switching networks

Modeling of a controlled retransmission scheme for loss recovery in optical burst switching networks

A Novel Implementation of TCP Vegas by UsingA Fuzzy-Threshold Base Algorithm to Improve Performance of Optical Networks

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