Availability Improvement of WDM System Using Ring Structures

This work deals with modelling and availability analysis for the different systems, which are based on WDM (Wavelength Division Multiplying) technology. In the introduction the reasons are stated because of which the high availability of the system is important. Furthermore, the basic terms are introduced pertaining to the availability with particular review of the parallel structure. Then the availability of the system of the various WDM systems is analyzed: point-point, chain and ring with 1 + 1 protection of the wave channel as well as the influence of the availability of the nodes and links on the total availability of the analyzed systems. The data on defects intensity and medium repair time of certain components were taken from literature. We assumed in the analysis that it is about WDM system with 16 wave lengths and with 2.5 Gb/s as a basic capacity carried by the wave channel. At the end of paper the results are presented of the calculation and comparisons of the availability of the various WDM systems as well as a proposal for improvement of its availability.