Title: Energy-efficient and spectral-efficient mixed line rate optical WDM networks: a comparison

Authors: Rochak Bajpai; Sridhar Iyer; Shree Prakash Singh; Sujata Sengar

Addresses: Division of ECE, Netaji Subhas Institute of Technology, Azad Hind Fauj Marg, Sector-3, Dwarka, 110078, New Delhi, India ' Department of ECE, Jain College of Engineering, T.S. Nagar-Machhe, Belagavi, Karnataka, 590014, India ' Division of ECE, Netaji Subhas Institute of Technology, Azad Hind Fauj Marg, Sector-3, Dwarka, 110078, New Delhi, India ' Division of ECE, Netaji Subhas Institute of Technology, Azad Hind Fauj Marg, Sector-3, Dwarka, 110078, New Delhi, India

Abstract: The tremendous increase in volume and heterogeneity of traffic has resulted in significant innovations in telecommunication networks. In view of optical networks, by adopting a mixed line rate (MLR) strategy, wavelength division multiplexed networks can cost-effectively respond to diverse variety of traffic requirements which have heterogeneous service demands. From existing studies on MLR networks, it can be inferred that depending upon channel configuration, modulation format and link length, a spectral-efficient network can outperform a power-efficient network. In the current work, we compare the performance of a MLR network which is spectral-efficient and power-efficient. We conduct extensive simulations considering realistic parameters and physical layer impairments. To the network designers, our study advocates a MLR network which is spectrally efficient since; our results demonstrate that, in addition to achieving close packing of the channels, a spectrally-efficient MLR network is also able to achieve close performances to that shown by power-efficient MLR network.

Keywords: mixed line rate; MLR; single line rate; power-efficiency; sub-band spacing; spectral-efficiency.

DOI: 10.1504/IJCNDS.2020.107459

International Journal of Communication Networks and Distributed Systems, 2020 Vol.24 No.4, pp.339 - 356

Received: 18 Sep 2018
Accepted: 23 Dec 2018

Published online: 24 Apr 2020 *

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