Evaluation of Reservation Mechanisms for Optical Burst Switching

Dolzer, Klaus; Gauger, Christoph M.; Späth, Jan; Bodamer, Stefan

doi:10.1078/1434-8411-00004

Cited by 203 publications

(116 citation statements)

References 8 publications

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“…Second, in circuit switching, allocated resources are exclusively available to the end-to-end connection for its entire duration, while in OBS, the reserved resources at each switch and output link port are held only for the duration they are needed for switching and transmission of individual bursts. It is worth noting that in OBS networks, where link propagation delay is significantly larger than burst-transmission time, multiple bursts could simultaneously propagate not only the same route but also along the same link and wavelength [2].…”

mentioning

confidence: 99%

Performance analyses of optical burst-switching networks

Rosberg

Zukerman

et al. 2003

IEEE J. Select. Areas Commun.

142

111

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Abstract-This paper provides a scalable framework for analysis and performance evaluation of optical burst-switching (OBS) networks. In particular, a new reduced load fixed point approximation model to evaluate blocking probabilities in OBS networks is introduced. The model is versatile enough to cover known OBS reservation policies such as just-enough-time, just-in-time, burst segmentation, and route-dependent priorities. The accuracy of the model is confirmed by simulation and the various policies are compared.Index Terms-Optical burst-switching (OBS), Erlang fixed point approximation, reduced load, queueing model, loss probability.

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mentioning

confidence: 99%

Performance analyses of optical burst-switching networks

Rosberg

Zukerman

et al. 2003

IEEE J. Select. Areas Commun.

142

111

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“…We use the mathematical model given in [22] to perform this analysis. In this model, there are two classes of traffic, one of which is sent using a QoS offset.…”

Section: Analysis Of Effect Of Qos Offset On Completion Timementioning

confidence: 99%

“…Since the loss probabilities of the grid and best-effort traffic are interdependent, these equations have to be solved iteratively, as described in [22].…”

Section: Analysis Of Effect Of Qos Offset On Completion Timementioning

confidence: 99%

Joint resource and network scheduling with adaptive offset determination for optical burst switched grids

Koseoglu

Karasan

2010

Future Generation Computer Systems

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a b s t r a c tOptical burst switching (OBS) is a promising technology for optical grids with short-lived and interactive data communication requirements. On the other hand, burst losses are in the nature of the OBS protocol and these losses severely affect the grid job completion times. This paper first proposes a joint grid resource and network provisioning method to avoid congestion in the network in order to minimize grid job completion times. Simulations show that joint provisioning significantly reduces completion times in comparison to other methods that perform network provisioning after grid scheduling. An adaptive extra offset based quality of service (QoS) mechanism is also proposed in order to reduce grid burst losses in case of network congestion. Results show that this adaptive mechanism significantly reduces grid completion times by exploiting the trade-off between decreasing loss probability and increasing delay introduced by the extra offset time.

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“…Furthermore, due to reservations, OBS bursts use the path links in a time-synchronized manner, while packets use them asynchronously. It is worth noting that in OBS networks, where link propagation delay is significantly larger than burst transmission time, multiple bursts could simultaneously propagate not only along the same route but also along the same link and wavelength [4].…”

Section: Introductionmentioning

confidence: 99%