A Scalable Model for the Performance Evaluation of ROADMs with Generic Switching Capabilities |
In order to evaluate the performance of Reconfigurable Optical Add/Drop Multiplexers (ROADMs) consisting of a single large switch, in circuit switched Wavelength-Division Multiplexing (WDM) networks, a theoretical Queuing Network Model (QNM) is developed, which consists of two M/M/c/c loss systems each of which is analyzed in isolation. An overall analytical blocking probability of a ROADM is obtained. This model can also be used for the performance optimization of ROADMs with a single switch capable of switching all or a partial number of the wavelengths being used. It is demonstrated how the proposed model can be used for the performance evaluation of a ROADM for different number of wavelengths inside the switch, in various traffic intensity conditions producing an exact blocking probability solution. The accuracy of the analytical results is validated by simulation.
Tsokanos A, Mouchos H, Giacoumidis E, Tang JM