Comparative Study of IP Backbone Network Modeled Optimally and through Bandwidth Overprovision

Abstract

Due to high traffic variability and significant contribution to CAPEX and OPEX, and expected high
reliability, it is no longer practical to construct IP backbone networks by connecting many standalone components
without careful planning and design as it is commonly done with the bandwidth overprovision approach. Innovation is
required to support growth and proliferation of services and devices while enabling greater efficiencies that drive
consolidation and reduction in costs. In this paper, a comparative study on the optimally designed and bandwidth
overprovision models of IP backbone network is carried out. Both models were developed by a combination of proper
traffic model selection and analysis, and the use of computer modelling and simulating tools in the framework of a
doctoral thesis. Riverbed Modeler was first used to optimally design the IP backbone network topology for Benue State in
Nigeria. Then, the topology of the IP backbone network was developed based on the generic bandwidth overprovision
model and converted into a simulation model also in the Riverbed modeler environment. Then the generalities of the two
models were used to perform comparative analyses of the optimally designed model against the bandwidth overprovision
model. The results of the study verified that the bandwidth overprovision model is predisposed to inefficient utilization of
bandwidth and network resources. This leads to the conclusion that IP backbone networks need to be designed optimally
instead of the bandwidth overprovision approach