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Different routing schemes for multi-layer and multidomain optical networks are analyzed, and a novel routing architecture is described in the paper. Cooperation models between dual routing engine in large-scale multi-layer and multidomain optical networks are researched, and an optimal model is proposed and simulated. Then the scalability of dual routing engine architecture is validated on DRE testbed.
In automatically restorable optical networks, the control plane has to detect a failure and send traffic through recovery paths. A successful restoration is guaranteed if an appropriate number of spare resources is available in the network. Usually a quality of transmission (QoT) estimator helps estimate the number of opto-electronic devices to guarantee transparent connection, within a given confidence...
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...
This paper discusses two challenges, failure recovery enhancement and scalability enhancement, on optical network control plane. These challenges enable us to provide optical networks with high reliability and lower operational cost.
We propose a novel hierarchical optical path network design algorithm ensuring wavelength path protection. The effectiveness of the waveband networks that adopt waveband or wavelength path protection are elucidated compared to single layer optical networks.
In this paper, we propose a new heuristic algorithm, protection based on survivable integrated auxiliary graph (PSIAG), to tolerate the single-link failure in waveband switching optical networks. The survivable integrated auxiliary graph (SIAG) contains single virtual topology layer and multiple waveband-plane layers, and it can well solve the routing and waveband assignment. In PSIAG, we can well...
To guarantee a high switching speed, routing in vertically stacked optical banyan (VSOB) networks needs special attention so that connections are established as fast as possible. Previously proposed Pruned Vertically Stacked Optical banyan (P-VSOB) networks used Plane Fixed Routing (PFR) algorithm, and has O(log2N) time complexity. Blocking probability has also been analyzed for these kinds of networks...
This paper discusses two challenges, multiple failure recovery and scalability enhancement, on GMPLS control plane. These challenges enable to provide high reliability and lower operational cost on future optical networks.
This paper deals with the problem of survivable routing and wavelength assignment in layer 1 virtual private networks (VPNs). The main idea is link-disjointly routing the selected lightpaths specified by the customer. The customer identifies some sites or some connections, and their related lightpaths are routed link-disjointly through the providerpsilas network. Selective survivability gives the...
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