Performance comparison of OCS and OBS switching paradigms

Coutelen, Thomas; Elbiaze, Halima; Jaumard, Brigitte

doi:10.1109/icton.2005.1505788

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…The authors in [10]- [11] showed that under some conditions, the throughput (or goodput) of OBS networks is less than that of OCS networks. Zalesky [12] showed that for some cases, with the same utilization, the blocking probability in OCS networks is lower than that in OBS networks.…”

Section: Introductionmentioning

confidence: 96%

Improving OBS efficiency

Wang

Wong

et al. 2014

2014 16th International Conference on Transparent Optical Networks (ICTON)

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In optical burst switching (OBS), a source node, without reserving network resources end-to-end, transmits bursts in available wavelength channels through a sequence of Optical Cross Connects (OXCs). While it saves time, OBS has a weakness that if for a given burst at a given OXC all the channels in a trunk on its route to its destination are occupied, the burst is either dumped or deflected to longer routes. This may adversely affect efficient use of network resources. This paper describes and compares numerically a range of approaches that improve OBS efficiency by addressing the problem of ineffective utilization.

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Section: Introductionmentioning

confidence: 96%

Improving OBS efficiency

Wang

Wong

et al. 2014

2014 16th International Conference on Transparent Optical Networks (ICTON)

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“…Optical fibers are ideal transfer media for the growing traffic demands in metro and long-haul networks, providing vast capacity and offering steady long-reach transmission [1]. As the most mature optical switching technology, optical circuit switching (OCS) can provide guaranteed quality of service (QoS), but the wavelength utilization is inadequate [2]. Being the ideal optical switching, optical packet switching (OPS) can achieve high utilization; however, the immature optical processing technologies make it impractical.…”

Section: Introductionmentioning

confidence: 99%

Flow Scheduling in OBS Networks Based on Software-Defined Networking Control Plane

Tang¹,

Fan²,

Chen³

2016

KSII TIIS

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The separated management and operation of commercial IP/optical multilayer networks makes network operators look for a unified control plane (UCP) to reduce their capital and operational expenditure. Software-defined networking (SDN) provides a central control plane with a programmable mechanism, regarded as a promising UCP for future optical networks. The general control and scheduling mechanism in SDN-based optical burst switching (OBS) networks is insufficient so the controller has to process a large number of messages per second, resulting in low network resource utilization. In view of this, this paper presents the burst-flow scheduling mechanism (BFSM) with a proposed scheduling algorithm considering channel usage. The simulation results show that, compared with the general control and scheduling mechanism, BFSM provides higher resource utilization and controller performance for the SDN-based OBS network in terms of burst loss rate, the number of messages to which the controller responds, and the average latency of the controller to process a message.

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“…In the Grid over OBS, each Grid job is encapsulated into a burst, and then it is transmitted to a remote site with its corresponding control packet containing requirements such as deadline and necessary storage. The Grid over OBS can be utilized more effectively than lightpath-based optical grid if one of the following conditions holds; (1) the job size is small (on the order of a few megabytes), (2) the job-arrival time is highly unpredictable, and (3) the location of job submissions is highly unpredictable [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

FEC-Based Reliable Transmission for Multiple Bursts in OBS Networks

Satoshi¹,

Tachibana²,

Kaji³

et al. 2007

IEICE Transactions on Communications

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In this paper, we consider consecutive burst transmission with burst loss recovery based on Forward Error Correction (FEC) in which redundant data is transmitted with multiple bursts. We propose two burst generation methods: Out-of Burst Generation (OBG) and In-Burst Generation (IBG). The OBG generates a redundant burst from redundant data, while the IBG reconstructs a burst from an original data block and a part of the redundant data. For both methods, the resulting bursts are transmitted consecutively. If some bursts among the bursts are lost at an intermediate node, the lost bursts can be recovered with the redundant data using FEC processing at the destination node. We evaluate by simulation the proposed methods in a uni-directional ring network and NSFNET, and compare the performances of the proposed methods with the extra-offset time method. Numerical examples show that the proposed methods can provide a more reliable transmission than the extra-offset time method for the OBS network where the maximum number of hops is large. Moreover, it is shown that the end-to-end transmission delay for our proposed methods can be decreased by enhancing the FEC processor or by increasing the number of FEC processors.

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Performance comparison of OCS and OBS switching paradigms

Cited by 14 publications

References 10 publications

Improving OBS efficiency

Improving OBS efficiency

Flow Scheduling in OBS Networks Based on Software-Defined Networking Control Plane

FEC-Based Reliable Transmission for Multiple Bursts in OBS Networks

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