Span-Restorable Elastic Optical Networks Under Different Spectrum Conversion Capabilities

• Published in: IEEE transactions on reliability Vol. 63; no. 2; pp. 401 - 411
• Main Authors: Yue Wei, Gangxiang Shen, Bose, Sanjay Kumar
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2014; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bandwidth; Elastic optical networks; flexi-grid; Frequency conversion; Frequency selective surfaces; Indexes; Optical design; Optical fiber networks; span restoration; spectrum continuity; spectrum conversion; Wavelength division multiplexing
• ISSN: 0018-9529; 1558-1721
• DOI: 10.1109/TR.2014.2313806

This paper deals with the design of a span-restorable (SR) elastic optical network under different spectrum conversion capabilities, including 1) no spectrum conversion, 2) partial spectrum conversion, and 3) full spectrum conversion. We develop Integer Linear Programming (ILP) models to minimize both the required spare capacity and the maximum number of link frequency slots used for each of the three spectrum conversion cases. We also consider using the Bandwidth Squeezed Restoration (BSR) technique to obtain the maximal restoration levels for the affected service flows, subject to the limited frequency slot capacity on each fiber link. Our studies show that the spectrum conversion capability significantly improves spare capacity efficiency for an elastic optical network.