Abstract
In this article we present a software to simulate Transparent Optical Networks (SIMTON). SIMTON is an eventdriven simulation software implemented in C++ which takes into account optical device characteristics for the evaluation of network blocking probability in wavelength routed transparent optical networks. The simulator uses a physical layer model that considers the following effects: device losses, fiber attenuation, four wave mixing, residual chromatic dispersion and polarization mode dispersion in optical fibers, gain saturation in optical amplifiers (Erbium Doped Fiber Amplifier), dependence of the amplified spontaneous emission noise with the input power in EDFA, in-band crosstalk in optical switches, and source spontaneous emission noise of the laser transmitter. By using SIMTON it is possible to adjust the parameters of the optical devices, as well as to choose the routing and wavelength assignment algorithm. Moreover, the tool has a graphical interface. We also present some examples of network analysis results obtained from SIMTON.
Highlights
O PTICAL networks are currently the most used technology by the telecommunications carriers for the implementation of their backbones
We have recently presented a simulation tool called simulate Transparent Optical Networks (SIMTON) [12], which considers, in addition to the effects considered by SIMON, the following optical layer impairments: polarization mode dispersion (PMD), residual chromatic dispersion (RCD), four wave mixing (FWM) and the dependence of amplified spontaneous emission noise (ASE) with the Erbium doped fiber amplifier (EDFA) input optical power [13], [14]
This paper is organized as follows: in Section II we declare the SIMTON implementation assumptions; in Section III we present the analytical model used by SIMTON to evaluate the optical physical impairments; in Section IV we show the SIMTON graphical interface; in Section V we present the statistical analysis of the simulator, in Section VI we list its cases of use; in Section VII we show some examples of simulation results and, ; in Section VIII we give our conclusion
Summary
O PTICAL networks are currently the most used technology by the telecommunications carriers for the implementation of their backbones. In order to estimate the impacts of signal degradation in the optical layer, three strategies can be adopted: the use of numerical calculations for wave propagation in optical fibers and devices (numerical solution), the implementation of an optical testbed (experimental solution) or the use computers to simulate the network operation. The tools do not consider the degradation of the signal in the optical layer, which means that they can only be applied to opaque networks In this first group the following projects can be listed: OWNS [6] (extension of the Network Simulator [7]), OPNET [8], NIST Merlin [9], and TONetS [10]. Present the analytical model used by SIMTON to evaluate the optical physical impairments; in Section IV we show the SIMTON graphical interface; in Section V we present the statistical analysis of the simulator, in Section VI we list its cases of use; in Section VII we show some examples of simulation results and, ; in Section VIII we give our conclusion
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