Ralf Huelsermann

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In this paper, a new shared protection mechanism for meshed optical networks is presented. Significant network design cost reductions can be achieved in comparison to the well-known 1 + 1 protection scheme. Demand-wise Shared Protection (DSP) is based on the diversification of demand routings and exploits the network connectivity to restrict the number of(More)
In this paper, we investigate the connection availabilities for the new protection scheme Demand-wise Shared Protection (DSP) and describe an appropriate approach for their computation. The exemplary case study on two realistic network scenarios shows that in most cases the availabilities for DSP are comparable with that for 1+1 path protection and better(More)
This paper evaluates different architectures for multilayer IP transport networks. The evaluation is based on an exemplary network dimensioning of a reference IP backbone network topology, connecting 63 points of presence (PoPs) in Germany. The network dimensioning results are used for a techno-economic analysis of the different network architectures,(More)
In this paper we first report on an optimization process for assessing the sensitivity on CAPEX of the most important parameters of IP-aggregation / IP-core and WDM transport networks. We then combine resulting transport network topologies with content delivery functions placed in caches. We analyze their impact on network CAPEX and optimize content(More)
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