Increasing the cost-constrained availability of WDM networks with degree-3 structured topologies

Abstract

This paper studies the impact of node degree distribution to availability and capital and deployment expenditure of optical WDM transport networks. Three structured degree-3 graphs with fair node degree distribution are proposed in this context. Using a realistic network optimization framework based on genetic algorithms, we evaluate the performance of structured topologies and compare it against a practical topology (NSFNET). The results manifest that nodal degree fairness leads to increased availability compared to conventional topologies, while not incurring higher capital and deployment cost.

Cost and availability analysis of 2- and 3-connected WDM networks physical interconnection

“…The objective function used in this process is minimum deployment cost, similar strategies can be found in [6].…”

“…This method has been used in [6] and [9] to design the physical interconnection as organized topologies. In this work this approach is used for optimizing the interconnection as a ring topology.…”

“…The deployment costs are calculated based on the model described in [6]. Basically, this model considers the costs for trenching, fiber spans, and switching nodes.…”

“…The natural evolution is to move from the mentioned physical rings (degree 2) to degree 3 interconnections at backbone and distribution levels. Several of these types of organized networks have been proposed for future physical backbone interconnection in [6].…”

Strategies on 3-connected graphs optimization search for future ICT infrastructure

“…The authors have been working with similar problems in [3] and [4], by designing the interconnection following specific topologies, i.e. degree 3, 3-connected among others.…”