Abstract
With the ever-increasing demand for bandwidth, appropriate mechanisms that would provide reliable and optimum service level to designated or specified traffic classes during heavy traffic loads in networks are becoming particularly sought after. One of these mechanisms is the resource reservation mechanism, in which parts of the resources are available only to selected (pre-defined) services. While considering modern elastic optical networks (EONs) where advanced data transmission techniques are used, an attempt was made to develop a simulation program that would make it possible to determine the traffic characteristics of the nodes in EONs. This article discusses a simulation program that has the advantage of providing the possibility to determine the loss probability for individual service classes in the nodes of an EON where the resource reservation mechanism has been introduced. The initial assumption in the article is that a Clos optical switching network is used to construct the EON nodes. The results obtained with the simulator developed by the authors will allow the influence of the introduced reservation mechanism on the loss probability of calls of individual traffic classes that are offered to the system under consideration to be determined.
Highlights
The amount of data transmitted over backbone networks is on a continuous increase due to the growing variety and popularity of the services provided in networks of new generation
Each of the services executed in telecommunications networks requires different transmission rates to minimalise the phenomenon of bitrate mismatch between the data stream related to a specific service and the optical layer of the backbone network; it is necessary to appropriately allocate available spectral resources to these services
elastic optical networks (EONs) are used, which have the propriety of elastic bandwidth and adaptive gap between channels [2], and the channel width can be changed dynamically according to the requirements of the transmission bitrate that is necessary for a given service to be executed in the network
Summary
The amount of data transmitted over backbone networks is on a continuous increase due to the growing variety and popularity of the services provided in networks of new generation. Each of the services executed in telecommunications networks requires different transmission rates to minimalise the phenomenon of bitrate mismatch between the data stream related to a specific service and the optical layer of the backbone network; it is necessary to appropriately allocate available spectral resources to these services. The growing number of offered services executed with the application of network resources is clearly observable This causes an increase in network traffic, which in turn defines one of the main traffic problems related to the provision of optimal access to network resources for demands (calls) of different traffic classes.
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