Performance Comparison of Dynamic Elastic Optical Networks with Optical Regeneration

  • Lê Hải Châu Posts and Telecommunications Institute of Technology
  • Đặng Hoài Bắc Posts & Telecommunications Institute of Technology
Keywords: Optical regenerator, routing, modulation format and spectrum assignment, network control algorithm, elastic optical network

Abstract

We have investigated optical regeneration issues and application in elastic optical networks that are capable of providing dynamically optical paths with flexible bandwidths. We have analyzed the impact of optical regeneration in elastic optical networks and clarified various usage scenarios. We have then evaluated and compared the performance, in terms of the overall blocking probability and the total accommodated traffic volume, of three possible network scenarios with regeneration capability including (i) no regeneration, (ii) 3R regeneration, and (iii) 4R regeneration for practical network topologies. Numerical simulation proved that deployment of optical regeneration devices can exploit elastic optical networking to enhance the network performance for provisioning dynamically bandwidth-flexible lightpath services. It is also demonstrated that using re-modulation function while regenerating optical signals (4R regeneration) can further improve the network performance. However, due to the high cost of optical regeneration devices, especially all-optical ones, and more functional regenerators, the trade-off between the performance enhancement and the necessary number of regenerating devices needs to be carefully considered.

Author Biography

Lê Hải Châu, Posts and Telecommunications Institute of Technology
Hai-Chau Le received the B.E. degree in Electronics and Telecommunications Engineering from Posts and Telecommunications Institute of Technology (PTIT) of Vietnam in 2003, and the M.Eng. and D.Eng. degrees in Electrical Engineering and Computer Science from Nagoya University of Japan in 2009 and 2012, respectively. From 2003 to 2006, he worked at Telecommunications Faculty of PTIT as a lecturer. He was a researcher in Nagoya University from 2012 to 2014. He then became a research scientist at University of California, Davis. Now, he is a lecturer/researcher at PTIT. He is an IEEE member.

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Published
2019-07-26
Section
Articles