Estimating the effect of Wavelength Selective Switch latency on optical flow switching performance

Shakeri, Ali; Wang, Xue; Razo, Miguel; Fumagalli, Andrea; Alabarce, Miquel Garrich; Oki, Eiji; Yamanaka, Naoaki

doi:10.1109/hpsr.2017.7968681

Cited by 3 publications

(3 citation statements)

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“…Results reported in Fig. 4(b) are the average of ten experiments in two WSS devices and exhibit a linear dependence on the number of channels to be configured with minimal standard deviation (confidence intervals using vertical lines are not reported for the sake of legibility) as in [31]. The curve indicates that the time required to complete the adjustment of the WSS-applied attenuation is proportional to the number of wavelengths for which the attenuation is being adjusted.…”

Section: Analytical Evaluation Of Tsomentioning

confidence: 97%

“…In order to evaluate the impact of the configuration time of the WSS devices on the lightpath disruption time, we review our recently reported experimental results [28], [31]. In particular, a SDN controller makes use of a standard protocol (e.g., a REST interface) to communicate with the firmware of the WSS (Fig.…”

Section: Analytical Evaluation Of Tsomentioning

confidence: 99%

“…(b) Time required for a single WSS operation vs. the number of wavelengths. Empty squares report manufacturer specifications (upper bound for the WSS hardware configuration time) and solid squares report experimental measurements of a complete operation cycle, i.e., service time (average of ten experiments in two WSS devices)[28],[31].…”

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confidence: 99%

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Experimental Validation of Time-Synchronized Operations for Software-Defined Elastic Optical Networks

Bravalheri

Alabarce

Muqaddas

et al. 2017

J. Opt. Commun. Netw.

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Elastic Optical Networks (EON) have been proposed as a solution to efficiently exploit the spectrum resources in the physical layer of optical networks. Moreover, by centralizing legacy Generalized Multi-Protocol Label Switching (GMPLS) control-plane functionalities and providing a global network view, Software Defined Networking (SDN) enables advanced network programmability valuable to control and configure the technological breakthroughs of EON. In this paper, we review our recent proposal [1] of time-synchronized operations (TSO) to minimize disruption time during lightpath reassignment in EON. TSO have been recently standardized in SDN and here we discuss its implementation using NETCONF and OpenFlow in optical networks. Subsequently, we update our analytical model considering an experimental characterization of the WSS operation time. Then, we extend our previous work with an experimental validation of TSO for lightpath reassignment in a five-node metropolitan optical network test-bed. Results validate the convenience of our TSO-based approach against a traditional asynchronous technique given its reduction of disruption time while both techniques maintain a similar network performance in terms of optical signal-to-noise ratio (OSNR) and optical power budget.

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Section: Analytical Evaluation Of Tsomentioning

confidence: 97%

Section: Analytical Evaluation Of Tsomentioning

confidence: 99%