λ-Ring System: An Application in Survivable WDM Networks of Interconnected Self-Healing Ring Systems

Yasuhiro MIYAO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E84-B   No.6   pp.1596-1604
Publication Date: 2001/06/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Fiber-Optic Transmission
Keyword: 
network protection,  self-healing ring,  OADM,  

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Summary: 
This paper proposes a λ-ring system that is a wavelength-based self-healing-ring application unlike ordinary fiber-based ones. To design survivable networks of interconnected such self-healing ring systems, a virtual mesh network scheme is used, in which wavelength assignment in virtual links can be considered according to the λ-ring-system or fiber-ring-system applications of the bidirectional wavelength-path switched architecture. Integer-programming-based design problems are then formulated that minimize the total fiber length in these self-healing-ring applications. Numerical examples show that the λ-ring-system application is always superior to 4-fiber and 2-fiber-ring-system applications and 1+1 end-to-end path protection.