A framework for deterministic delay guarantee in OBS networks

A framework for deterministic delay guarantee in OBS networks In OBS networks, the delay of control packets in the switch control unit (SCU) of core nodes influences burst loss performance in the optical switching and should be constrained. Furthermore, the end-to-end (E2E) delay requirements of premium services need queueing delay guarantee in network nodes throughout the transmission path. For this purpose, a framework for deterministic delay guarantee is proposed in this article. It incorporates the deterministic delay model in the ingress edge node as well as in the SCUs of core nodes. On this basis, the configuration of the assembler and the offset time is addressed by means of an optimization problem under the delay constraints. Scenario studies are carried out with reference to realistic transport network topologies. Compared to statistical delay models in the literature, the deterministic model has advantages in rendering robust absolute delay guarantee for individual FEC flows, which is especially appreciated in the provisioning of premium services. By performance evaluation in comparison with the statistical models, it is shown that the adopted deterministic delay models lead to practical delay bounds in a magnitude that is close to the delay estimations by stochastic analysis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

A framework for deterministic delay guarantee in OBS networks

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Publisher
Springer Journals
Copyright
Copyright © 2010 by The Author(s)
Subject
Computer Science; Characterization and Evaluation of Materials; Electrical Engineering; Computer Communication Networks
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-010-0268-9
Publisher site
See Article on Publisher Site

Abstract

In OBS networks, the delay of control packets in the switch control unit (SCU) of core nodes influences burst loss performance in the optical switching and should be constrained. Furthermore, the end-to-end (E2E) delay requirements of premium services need queueing delay guarantee in network nodes throughout the transmission path. For this purpose, a framework for deterministic delay guarantee is proposed in this article. It incorporates the deterministic delay model in the ingress edge node as well as in the SCUs of core nodes. On this basis, the configuration of the assembler and the offset time is addressed by means of an optimization problem under the delay constraints. Scenario studies are carried out with reference to realistic transport network topologies. Compared to statistical delay models in the literature, the deterministic model has advantages in rendering robust absolute delay guarantee for individual FEC flows, which is especially appreciated in the provisioning of premium services. By performance evaluation in comparison with the statistical models, it is shown that the adopted deterministic delay models lead to practical delay bounds in a magnitude that is close to the delay estimations by stochastic analysis.

Journal

Photonic Network CommunicationsSpringer Journals

Published: Aug 11, 2010

References

  • Terabit burst switching
    Turner, J.S.
  • Optimized combination of converter pools and FDL buffers for contention resolution in optical burst switching
    Gauger, C.M.
  • An absolute QoS framework for loss guarantees in optical burst-switched networks
    Phung, M.; Chua, K.; Mohan, G.; Motani, M.; Wong, D.
  • Edge node buffer usage in optical burst switching networks
    Li, H.; Thng, I.L.-J.
  • Deterministic delay guarantee in OBS edge node for premium services
    Hu, G.; Raffaelli, C.; Perin, A.

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