Authors:
Hehong Fan
;
Mingde Zhang
and
Xiaohan Sun
Affiliation:
Lab of Optical Communications and Photonics, Southeast University, China
Keyword(s):
Network performability, WDM network, link capacity, reliability evaluation, channel-related elements, multiple working-states object (MWSO).
Related
Ontology
Subjects/Areas/Topics:
e-Commerce Security and Reliability Issues
;
Information and Systems Security
Abstract:
A reliability evaluation module is presented for study of WDM network reliability. In this module, WDM networks are assumed to consist of three kinds of network elements - nodes, links and wavelength channel-related elements. And a network performance index – network ‘function value’, was introduced here as a quantitative representation of working-state of WDM network under certain link capacity and hop requirements. In addition, WDM networks here are assumed to be a survivable network, which can operate in a degradative manner against destruction and thus have multiple working-states instead of two opposite states. The reliability evaluation module was used to analyse the reliability of a WDM network with CERNET topology. Simulation results indicate that different link capacity requirement as well as different working-state requirements may lead to different reliability evaluation results, and the differences will enlarge very quickly with the increasing of network element failure r
ates. This implies that the study of WDM network reliability should be performed under multiple working-states assumption and the addition of the new network element kind - a wavelength channel-related element is necessary.
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