Abstract
This article proposes an analytical method for determining the traffic characteristics of multi-service switching networks in elastic optical networks. The method takes into consideration the limitations of W-S-W (wavelength-space-wavelength) switching networks in the execution of multi-slot connections in line with the concept of elastic optical networks. The results obtained on the basis of the developed analytical model are compared with the results obtained from the simulation experiments for a selected structure of a switching network. The study confirms the high accuracy of the proposed model. The model can be used to optimize and evaluate the effectiveness of blocking optical switching networks.
Highlights
I N recent years, optical networks, both access and backbone networks, have become the basic solutions offering high-speed bitrates, appropriate resource allocation mechanisms, and a variety of other services
In order to compare the accuracy of the proposed PGBOPT method, developed for W-S-W switching networks in optical networks, with the accuracy provided by the PGBMT method, developed for electronic switching networks, Fig. 11–13 show the results of modeling
This article proposes a new PGB-OPT method that has the advantage of modeling multi-service W-S-W switching networks operating in elastic optical networks (EONs)
Summary
I N recent years, optical networks, both access and backbone networks, have become the basic solutions offering high-speed (communication) bitrates, appropriate resource allocation mechanisms, and a variety of other services. Research and studies on optical switching networks focus mainly on the development of new nonblocking [1]–[5] and rearrangeable [6], [7] optical structures for switching networks. The construction of such systems, involves a huge number of switching points or complex control algorithms for setting up connections. This leaves us with a need to develop an effective solution based on a construction of blocking switching networks in which, depending on the intensity of offered traffic, blocking states can occur. This article aims to propose a new analytical model of multiservice multi-stage blocking switching networks, used in the nodes of EONs, that would make it possible to determine the influence of the traffic characteristics of these networks on the traffic effectiveness of network nodes
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