A new proposal to reduce burst contention in optical burst switching networks

Agusti-Torra, A.; Cervelló-Pastor, Cristina

doi:10.1109/icbn.2005.1589730

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Burst contention can be resolved using several approaches, such as wavelength conversion, buffering based on fiber delay line (FDL) or deflection routing. Since deflection cannot eradicate the burst loss, retransmission at the OBS layer has been suggested by Torra et al [5] to avoid resource contention. Another approach, called burst segmentation, resolves contention by dividing the contended burst into smaller parts called segments, so that a segment is dropped rather than the entire burst.…”

Section: Introductionmentioning

confidence: 99%

Graphical Probabilistic Routing Model for OBS Networks with Realistic Traffic Scenario

Lévesque

Elbiaze

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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Burst contention is a well-known challenging problem in Optical Burst Switching (OBS) networks. Contention resolution approaches are always reactive and attempt to minimize the BLR based on local information available at the core node. On the other hand, a proactive approach that avoids burst losses before they occur is desirable. To reduce the probability of burst contention, a more robust routing algorithm than the shortest path is needed. This paper proposes a new routing mechanism for JET-based OBS networks, called Graphical Probabilistic Routing Model (GPRM) that selects less utilized links, on a hop-by-hop basis by using a bayesian network. We assume no wavelength conversion and no buffering to be available at the core nodes of the OBS network. We simulate the proposed approach under dynamic load to demonstrate that it reduces the Burst Loss Ratio (BLR) compared to static approaches by using Network Simulator 2 (ns-2) on NSFnet network topology and with realistic traffic matrix. Simulation results clearly show that the proposed approach outperforms static approaches in terms of BLR.

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Section: Introductionmentioning

confidence: 99%

Graphical Probabilistic Routing Model for OBS Networks with Realistic Traffic Scenario

Lévesque

Elbiaze

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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“…However, as the load increases, deflection routing could lead to performance degradation and network instability. Since deflection can not eradicate the burst loss, retransmission at the OBS layer has been suggested by Torra et al [3].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Hybrid Deflection and Retransmission Routing for Optical Burst-Switched Networks

Lévesque

Elbiaze

Aly

2008

2008 IEEE PhotonicsGlobal@Singapore

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Burst contention is a well known challenging problem in Optical Burst Switching (OBS) networks. Deflection routing is used to resolve contention. Burst retransmission is used to reduce the Burst Loss Ratio (BLR) by retransmitting dropped bursts. Previous works show that combining deflection and retransmission outperforms both pure deflection and pure retransmission approaches. This paper proposes a new Adaptive Hybrid Deflection and Retransmission (AHDR) approach that dynamically combines deflection and retransmission approaches based on network conditions such as BLR and link utilization. Network Simulator 2 (ns-2) is used to simulate the proposed approach on different network topologies. Simulation results show that the proposed approach outperforms static approaches in terms of BLR and goodput.

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A general resource assignment scheme for successful transmission in optical burst switched networks

Agustí

Cervelló-Pastor

Fiol

2008

Optical Switching and Networking

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A new proposal to reduce burst contention in optical burst switching networks

Cited by 7 publications

References 3 publications

Graphical Probabilistic Routing Model for OBS Networks with Realistic Traffic Scenario

Graphical Probabilistic Routing Model for OBS Networks with Realistic Traffic Scenario

Adaptive Hybrid Deflection and Retransmission Routing for Optical Burst-Switched Networks

A general resource assignment scheme for successful transmission in optical burst switched networks

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