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—In translucent (or managed reach) WDM optical networks, regenerators are employed at specific nodes. Some of the connections in such networks are routed transparently, while others have to go through a sequence of 3R regenerators that serve as " refueling stations " to restore their quality of transmission (QoT). We extend an online multicost algorithm for(More)
We consider the energy minimization problem in optical networks from an algorithmic perspective. Our objective is to plan optical WDM networks so as to minimize the energy expended, by reducing the number of energy-consuming components, such as amplifiers, regenerators, add/drop terminals, optical fibers, etc. We initially present an algorithm for solving(More)
—We design and implement a multicost impairment-aware routing and wavelength assignment algorithm for online traffic. In transparent optical networks the quality of a transmission degrades due to physical layer impairments. To serve a connection, the proposed algorithm finds a path and a free wavelength (a lightpath) that has acceptable signal quality(More)
* To make future tactical battlefield networks more agile, flexible and robust, nodes must rapidly configure themselves with little or no human intervention; moreover they must reconfigure automatically as the environment changes. We present our approach to configuring and reconfiguring an entire network domain, possibly consisting of tens of thousands of(More)
We consider the offline version of the routing and wavelength assignment (RWA) problem in transparent all-optical networks. In such networks and in the absence of regenerators, the signal quality of transmission degrades due to physical layer impairments. Because of certain physical effects, routing choices made for one lightpath affect and are affected by(More)
We consider the problem of planning a mixed line rates (MLR) WDM transport optical network. In a MLR network, the interference between different modulation format/line rate connections affect the transmission reach of these connections. We present algorithms to plan a MLR network that take into account the variation of the transmission reach according to(More)
—We propose and evaluate an impairment-aware multi-parametric routing and wavelength assignment algorithm for online traffic in transparent optical networks. In such networks the signal quality of transmission degrades due to physical layer impairments. In the multi-parametric approach, a vector of cost parameters is assigned to each link, from which the(More)
We consider the offline version of the routing and wavelength assignment problem in transparent all-optical networks. In such networks and in the absence of regenerators, the signal quality of a transmission degrades due to physical layer impairments. Certain physical effects cause choices for one lightpath to affect and be affected by the choices made for(More)