Evaluating the expedited forwarding of voice traffic in a differentiated services network

Ziviani, Artur; Rezende, José Ferreira de; Duarte, Otto Carlos Muniz Bandeira

doi:10.1002/dac.564

Cited by 9 publications

(8 citation statements)

References 31 publications

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“…As a burst occupies one wavelength, future bursts may be blocked depending on the load offered to the network. In addition, the existing QoS mechanisms are proposed for packet-switched networks and, at most, are based on management of electronic buffers [18]. To employ these mechanisms in OBS networks, it is necessary to convert the optical signal to the electronic domain at each edge node, which limits the data transport rate.…”

Section: Introductionmentioning

confidence: 99%

An efficient admission control mechanism for optical burst-switched networks

et al. 2008

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This article proposes the load-level-based admission control (LLAC) mechanism in order to provide service differentiation for optical burst-switched networks. The LLAC mechanism admits bursts of a given service class according to the network load and a class-associated parameter. Based on this parameter, called load level, the proposed mechanism differentiates the burst blocking probability experienced by each service class. We develop an analytical model for the proposed mechanism and evaluate its performance for different configurations through mathematical analysis. The results show that the load-level-based mechanism reduces the blocking probability of high-priority bursts by two orders of magnitude or more depending on the analyzed scenario. In addition, compared to other similar mechanisms, the loadlevel-based mechanism effectively differentiates the services in all analyzed configurations, requires less states in optical burst switching (OBS) nodes, and does not suffer from priority inversion.

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Section: Introductionmentioning

confidence: 99%

An efficient admission control mechanism for optical burst-switched networks

et al. 2008

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“…As a burst occupies one wavelength, future bursts may be blocked depending on the load offered to the network. In addition, most of the existing QoS mechanisms proposed for electronic packet switching are based on buffer management [6]. To employ these mechanisms in OBS networks, optical buffers are needed.…”

Section: Introductionmentioning

confidence: 99%

Using the Network Load for Admission Control in OBS Networks: A Multilink Approach

Moraes¹,

Duarte²

2010

J. Opt. Commun. Netw.

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Abstract-In this article, we analyze the performance of the Load-Level-Based Admission Control mechanism (LLAC) for optical burst-switched networks in a multilink scenario. The goal of our mechanism is to differentiate the blocking probability of a given service class according to the network load and a classassociated parameter, called load level. We develop a multilink analytical model based on the reduced load approximation method to analyze the proposed mechanism in more realistic scenarios. The multilink model provides an estimation error up to 13 times lower than the one provided by the single-model for the analyzed configurations. Both are compared with simulation results. In addition, our results show that the load-level-based mechanism effectively differentiates the services in all analyzed configurations, when compared with other similar mechanisms.

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“…Once a burst occupies one wavelength, or a fraction of it, during the transmission, some bursts will be blocked depending on the load offered to the network. In addition, the existing QoS mechanisms are proposed for packet switched networks and, at most, are based on management of electronic buffers [4]. To employ these mechanisms in OBS networks, it is necessary to convert the optical signal to the electronic domain at each edge node, which limits the data transport rate.…”

Section: Introductionmentioning

confidence: 99%

Multilink Performance of the Load-Level-Based Admission Control Mechanism for OBS Networks

Moraes¹,

Duarte²

2008

2008 IEEE International Conference on Communications

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Abstract-In this paper, we analyze the performance of the Load-Level-Based Admission Control mechanism (LLAC) for optical burst-switched networks in a multilink scenario. The goal of this mechanism is to differentiate the blocking probability of a given service class according to the network load and a class-associated parameter, called load level. For the proposed mechanism, we develop a multilink analytical model based on the reduced load approximation method, which provides a more accurate blocking probability estimation than a single-link model. With the multilink model, the performance of the load-levelbased mechanism is even better than using a single-link model. For the analyzed scenarios, high-priority bursts experiences a blocking probability up to 60% lower than the one provided by the single-link model. The results also show that the loadlevel-based mechanism effectively differentiates the services in all analyzed scenarios, when compared to other similar mechanisms.

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Evaluating the expedited forwarding of voice traffic in a differentiated services network

Cited by 9 publications

References 31 publications

An efficient admission control mechanism for optical burst-switched networks

An efficient admission control mechanism for optical burst-switched networks

Using the Network Load for Admission Control in OBS Networks: A Multilink Approach

Multilink Performance of the Load-Level-Based Admission Control Mechanism for OBS Networks

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