Abstract

A novel coarse granular routing scheme for elastic optical networks is proposed in this paper, together with a node architecture and a network design algorithm. The proposed scheme allows any combination of optical paths to be routed together, and each bundle of paths, named “flexible waveband,” is routed as an entity. The flexibility in bundled paths differentiates the proposed routing scheme from optical path hierarchies proposed so far and is especially appropriate for elastic optical path networks in which frequency bandwidths of optical paths are not necessarily uniform. Path bundling at each input port of a node is realized with a small port count flexible grid wavelength selective switch (WSS), while flexible waveband routing is done by other optical switches, i.e., two-stage routing. These WSSs are only responsible for the path bundling, and their degrees need not be changed even if the number of fibers connected to a node, i.e., node fiber degree, is changed. Moreover, the number of WSSs increases linearly as the node fiber degree increases. The proposed network design algorithm resolves the routing and frequency slot assignment problem while considering specific constraints imposed by the routing scheme. Numerical experiments on several real and regular topologies confirm that the routing performance degradation caused by the coarse granularity of the routing is small while the number of WSSs is substantially reduced.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Compact OXC architecture, design and prototype development for flexible waveband routing optical networks

Tomohiro Ishikawa, Yojiro Mori, Hiroshi Hasegawa, Suresh Subramaniam, Ken-ichi Sato, and Osamu Moriwaki
Opt. Express 25(14) 15838-15853 (2017)

Highly spectral efficient networks based on grouped optical path routing

Yuki Terada, Yojiro Mori, Hiroshi Hasegawa, and Ken-ichi Sato
Opt. Express 24(6) 6213-6228 (2016)

Spectral Efficiency Maximization of Grouped Routing Optical Networks With Shared Protection

Tomohiro Ishikawa, Yojiro Mori, Hiroshi Hasegawa, and Ken-ichi Sato
J. Opt. Commun. Netw. 9(10) 864-875 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (18)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription