Lightpath blocking performance analytical model for a single ROADM node with intra-node add/drop contention

Abstract

In colorless and directionless ROADMs based on broadcast-and-select architectures, due to the intra-node contention, the number of lightpaths that can be added/dropped with the same wavelength is limited by the add/drop contention factor. In this paper, we develop an analytical model to evaluate the lightpath blocking performance for a single ROADM node with intra-node add/drop contention. The study indicates that the model is accurate to effectively predict the simulation results. Also, the add/drop contention factor shows an important impact on the lightpath blocking performance and properly raising contention factor can significantly improve the lightpath blocking performance.

Lightpath blocking analysis for optical networks with ROADM intra-node add-drop contention

“…An alternative approach to analytically predicting lightpath blocking with the intra-node contention is a novel contribution of this paper. As mentioned in general in [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43], this would be more desirable for the design and planning of networks as analytical methods not only give results faster and more conveniently than simulations, they would also allow a better understanding of the underlying behavior of the system. This has been attempted, for the first time in this paper, for ROADM nodes with intra-node contention.…”

“…We present here a model to analyze how the intra-node contention can impact lightpath blocking as this would be of great significance in the overall performance of the system. It should be noted that the assumptions and some equations in the model have extended or reused those in the models developed for the WDM networks in the literature such as [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Our key contribution is to incorporate ROADM intra-node contention to model blocking of lightpaths.…”

Modeling impact of ROADM intra-node Add/Drop contention on a single node lightpath blocking performance

“…A preliminary version of this work was presented on ICCC 2014, Shanghai, China [18]. This work was jointly supported by the National 863 Plans Project of China (2012AA050801), National Natural Science Foundation of China (NSFC) (61172057, ulation results obtained for a 4-degree node both with contention (add/drop contention factor C) and contentionless features.…”