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We propose two novel adaptive spectrum defragmentation algorithms in elastic optical networks by properly rerouting existing connections based on the evaluation of current network status, and numerical evaluation shown to be resource efficient.
As the survivable mapping is critical in IP-over-wavelength-division-multiplexing (WDM) network to guarantee the restorability of IP layer, provisioning survivability in network with dynamic traffic is essential. However, survivable mapping problem for dynamic traffic shows more complexity than that for static traffic: 1) How to guarantee a survivable mapping since the lightpath is established and...
As a key problem in wavelength switched optical networks (WSON) in which wavelengths are the most important resources, routing and wavelength assignment (RWA) problem has been researched extensively. Due to the advantages of path computation in multi-layer and multi-domain networks, especially in multi-constraints scenarios, path computation element (PCE) has been introduced into WSON, which provides...
A cost-effective capacity planning method of WDM networks is proposed for increase of traffic load. An improved cost-based ant colony algorithm is presented from pheromone increase and update mechanisms to solve the planning problem. Simulation results show the applicability of our planning method.
Translucent WDM networks use a set of sparsely but strategically placed 2R or/and 3R regenerators to overcome physical impairments and wavelength collision introduced by fully transparent networks. In this paper, we concentrate on the study of control architectures and management approaches for connection establishment in translucent networks. A hybrid OCP (optical control plane) has been proposed,...
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