Determination of Traffic Characteristics of Elastic Optical Networks Nodes with Reservation Mechanisms

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.

Simulation Studies of 3-Stage Clos Switching Network with Prioritization Mechanism Used in Flexible Wavelength-Division Multiplexing Network Nodes

“…In the case of multi-service switching networks, a comprehensive modeling approach involves the utilization of Erlang, Engset, and Pascal call streams [17,18], particularly focusing on Erlang-type traffic in this research. The switching network offered is Erlang traffic streams.…”

“…The termination of call service event indicates the completion of service for a specific call, leading to the release of the system's resources. The simulation program executes the handling of these events through dedicated functions, which are elaborated in other publications [17,18]. The overall block diagram of the simulation algorithm is depicted in Figure 5.…”

Advanced Considerations Concerning Impact of Applied Call Admission Control Mechanisms on Traffic Characteristics in Elastic Optical Network Nodes

“…The considered switching network may work with one of two selection path algorithms: point-to-group (Algorithm 1) and point-to-point (Algorithm 2) [32]- [34].…”

“…The simulator may be also used as an optimization tool. Detailed information on the simulator can be found in [32], [33], where the implemented algorithms and call servicing functions are described as well.…”

Research on Urban Road Network Evaluation Based on Fractal Analysis

“…In addition, previous studies focused on theoretical abstraction and qualitative description. It is difcult to give accurate quantitative analysis results based on the urban road network's overall situation, making it impossible for diferent urban studies to compare horizontally on a collaborative research platform [25][26][27]. At the same time, the qualitative research model also makes the conclusion vague.…”