Performance Improvement of Deflection Routing in Optical Burst Switching Networks

Lee, Sukyoung; Sriram, Kotikalapudi; Kim, Hyun‐Sook; Song, JooSeok

doi:10.1007/3-540-44863-2_44

Cited by 3 publications

(7 citation statements)

References 4 publications

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“…Indeed the general problem of deflection routing in buffer-less OBS networks is over-utilization of link resources, what happens if a deflected path has more hops than a primary path. Hence, since first proposals were based on the static route calculation and selection (e.g., [41]), in the next step the authors proposed an optimisation calculation of the set of alternative routes (e.g., [60,65]) as well as an adaptive selection of paths (e.g., [19]). The assignment of lower priorities to deflected bursts is another important technique which preserves from excessive burst losses on primary routes [11].…”

Section: Introduction and State-of-the-artmentioning

confidence: 99%

Performance Issues in Optical Burst/Packet Switching

Careglio

Aracil

Azodolmolky

et al. 2009

Towards Digital Optical Networks

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Esta es la versión de autor de la comunicación de congreso publicada en: This is an author produced version of a paper published in: Abstract. This chapter summarises the activities on optical packet switching (OPS) and optical burst switching (OBS) carried out by the COST 291 partners in the last 4 years. It consists of an introduction, five sections with contributions on five different specific topics, and a final section dedicated to the conclusions. Each section contains an introductive state-of-the-art description of the specific topic and at least one contribution on that topic. The conclusions give some points on the current situation of the OPS/OBS paradigms.

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Section: Introduction and State-of-the-artmentioning

confidence: 99%

Performance Issues in Optical Burst/Packet Switching

Careglio

Aracil

Azodolmolky

et al. 2009

Towards Digital Optical Networks

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“…Some of these studies claim that using particular deflection routing policies may reduce blocking probabilities by more than one order of magnitude. Efforts have also been devoted to dynamically optimizing deflection routes based on network state information [27]. Several approaches of resolving wavelength contention, including deflection routing, have been compared in terms of blocking probabilities via simulation studies [18], [55].…”

mentioning

confidence: 99%

“…We are interested in determining if deflection routing may also destabilize OBS. This issue has been glossed over in most of the recent literature treating deflection routing in OBS [13], [18], [26], [27], [50]. Although OBS is in many ways different from circuit switching as well as optical packet switching, it does not seem unreasonable to suspect that deflection routing may destabilize OBS.…”

mentioning

confidence: 99%

Stabilizing deflection routing in optical burst switched networks

Zalesky

Rosberg

et al. 2007

IEEE J. Select. Areas Commun.

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Abstract-This paper studies the blocking performance of optical burst switching (OBS) networks using a sequential office control (SOC) state-independent deflection routing policy. We show that unprotected deflection routing may destabilize OBS resulting in higher blocking probabilities than if bursts were not deflected but simply blocked. This study was motivated by the well-known destabilizing effect that alternative routing has on circuit switching in classical telephony networks. We propose two forms of protection to guard against destabilization: 1) wavelength reservation, which is analogous to trunk reservation in circuit switching; and, 2) preemptive priority, which is a new form of protection where bursts that have not been deflected are given preemptive priority over bursts that have been deflected. Our main contribution is a one-moment reduced-load approximation to evaluate the blocking performance of OBS networks using deflection routing protected by either wavelength reservation or preemptive priority. Our reduced-load approximation relies on the usual assumptions of link independence and Poisson distributed link arrivals. We quantify the error admitted in making these two assumptions via simulation. Using our reducedload approximation, we evaluate the blocking performance of protected and unprotected deflection routing in several randomly generated networks. The chief conclusion of our study is that deflection routing in OBS should be given some form of protection to avoid destabilization resulting from upward load variations, and in terms of blocking performance, preemptive priority is the best form of protection for OBS. We use simulation to verify that our conclusions remain valid for a realistic traffic scenario.

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“…Among them, the deflection routing is much more promising because of its lower requirements for optical components. However, the existing deflection routing algorithms [3]- [5] have some drawbacks in the control strategy and the path optimization. Motivated by the situations, the paper proposes a new contention resolution scheme, called Adaptive Parameter Deflection Routing (APDR for short), which features largely in the adaptivity to the traffic load and the QoS requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, many approaches [1]- [5] are proposed to resolve the burst contentions for OBS networks. Among them, the deflection routing is much more promising because of its lower requirements for optical components.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Parameter Deflection Routing to Resolve Contentions in OBS Networks

Long

Yang

Huang

et al. 2006

NETWORKING 2006. Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile A

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Abstract. Currently, the contention resolution is one of research focuses for optical burst switching (OBS). The paper presents a new contention resolution scheme, named as adaptive parameter-based deflection routing, which can control the deflection according to the time-varying traffic load and the QoS requirements. Compared with other schemes, the simulation results show that it can improve the overall BLP and the individual BLP of each class burst, and alleviate the offset-time deficit on QoS guarantee.

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Performance Improvement of Deflection Routing in Optical Burst Switching Networks

Cited by 3 publications

References 4 publications

Performance Issues in Optical Burst/Packet Switching

Performance Issues in Optical Burst/Packet Switching

Stabilizing deflection routing in optical burst switched networks

An Adaptive Parameter Deflection Routing to Resolve Contentions in OBS Networks

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