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Saravut Charcranoon Tarek S. El-Bawab Jong-Dug Shin Hakki C. Cankaya 《Photonic Network Communications》2006,11(1):99-110
We propose a new burst scheduling mechanism for Optical Burst-Switched (OBS) networks. The new approach is made possible by
gathering data bursts into groups and performing the scheduling decision for each group collectively. In OBS group-scheduling,
bursts will not be considered for scheduling until a pre-defined time period elapses, during which the group of burst header
packets would be gathered. By transforming a set of data bursts into a set of corresponding time intervals, the problem of
scheduling these bursts is transformed into a combinatorial optimization problem. Graph algorithms are applied to obtain the
maximum number of non-overlapping bursts. The proposed OBS group-scheduling scheme is shown to improve the performance of
OBS networks over existing scheduling schemes in terms of burst loss probability and channel utilization. With an extension
through a sequential optimization, using a Branch-and-Bound technique, the proposed scheme can support multiple classes of
service. It is shown that the new scheduling approach has several desired characteristics including fairness and service differentiability
among classes in terms of burst loss probability and channel utilization. 相似文献
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Saravut?Charcranoon Tarek?S.?El-BawabEmail author Jong-Dug?Shin Hakki?C.?Cankaya 《Journal of Network and Systems Management》2005,13(4):387-408
The problem of operation and maintenance (OAM) in optical burst switched (OBS) networks is not addressed by the optical-networking
community even though OBS has been gaining research interest in recent years. In this paper, we introduce a functional model
of OBS networks and an OAM architecture that is designed to meet the operational requirements based on this model. We present
the first framework to realize OAM in OBS networks, including OAM activities, OAM-aware OBS nodes, OAM information and communication
models and protocols. A number of practical examples of possible network failures and the corresponding reactions are presented. 相似文献
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