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This paper considers the problem of logical topology selection in an IP-over-WDM network, with the objective to minimize the total power consumption used to support the traffic demands. While there are several power consuming devices in a backbone WDM network, it is assumed that major power consumption occurs at IP router ports, which are termination points of optical connections or lightpaths. The...
This work proposes a distributed and adaptive mechanism for saving energy in IP/MPLS over WDM networks by switching off router line cards according to the traffic variability in the network. The proposed mechanism optimizes the traffic routing and adapts the IP topology to the traffic that is actually carried in the network. This is done by re- computing the path of each traffic flow several times...
The Internet explosion has drastically increased the bandwidth demand of modern telecommunication networks and as optical networks provide an opportunity for the future Internet, it is expected that Internet providers will gradually replace their infrastructures with optical networks. The Internet is a decentralized set of networks (more than 29.000) known as domains or Autonomous Systems on a well-known...
We present an novel analytical framework for modeling current IP offloading schemes and show their comparative performance. We analyze relevant parameters, including IP routing re-convergence time, the number of affected IP routes, and the cost of circuit capacity used for offloading. Our results show that emerging offloading solutions based on invisible bypasses can better maintain network stability...
The ICT and network services economy has exhibited large growth rates with global IP traffic expected to reach 64 exabytes per month in 2014. In addition to operational challenges in managing this traffic load, it is widely recognized that new energy saving approaches will be critical to the ICT sector for sustaining growth. In this paper, we use the optical bypass technique - which is a novel network...
In IP-over-WDM networks, wavelength circuits are often protected by dedicated backup circuits. Especially with future deployment of 100 G transmission systems, there will be huge under-utilization of backup resources. Network utilization can be boosted by loaning the idle backup circuits to preemptible IP/packet services. In the event of a failure, IP traffic can be pre-empted and wavelength backup...
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