Wavelength-transparent IP-over-CWDM network with stackable ROADMs for best effort performance

Authors

  • Md. Nooruzzaman,

    Non-member
    1. Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
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  • Shogo Kawai,

    Non-member
    1. Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
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  • Nguyen Thi Thanh Thuy,

    Non-member
    1. Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
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  • Osanori Koyama,

    Non-member
    1. Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
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  • Yutaka Katsuyama

    Member, Corresponding author
    1. Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
    • Electrical Engineering and Information Science, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
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Abstract

Stackable reconfigurable optical add/drop multiplexers (S-ROADMs) have been proposed for use in IP over coarse wavelength-division multiplexing (CWDM) networks so as to provide capabilities of remote lightpath reconfiguration and manual ROADM reconfiguration under the best effort transmission specified by the service level agreement. The S-ROADM can be constructed by connecting modules with different wavelengths required in the node. The experimental results clarify that the S-ROADM can add/drop or pass through the wavelengths successfully, providing no limit to the passing-through (PT) wavelengths, that is, ensuring the wavelength transparency in the network. The S-ROADMs could remove congestions by adding a lightpath remotely within a recovery time with degraded SLA. The transmission break time was also within the recovery time when adding a module manually to the in-service S-ROADM to increase bandwidth to be provided to new users. As a result, the S-ROADMs provide more flexible CWDM networks in terms of scalability and reconfigurability. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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