The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper addresses offline virtual topology design in transparent optical networks under given periodic traffic. We call this planning problem ldquoScheduled Virtual Topology Designrdquo. Two problem variants are considered: for a network based on non-reconfigurable equipment and for a network based on reconfigurable equipment. Two MILP (Mixed Integer Linear Program) formulations are proposed, one...
In two-layer networks there are various ways to improve virtual and physical topology and capacity allocations in terms of cost. One way is introducing bypass links, to reduce the amount of switching in the upper layer. Our approach for finding the bypass links and the corresponding bypass nodes is based on a mixed integer programming approach. Our starting point is a network without bypass functionality...
We propose a linear formulation for traffic routing in optical networks after the virtual topology design (VTD). The formulation maximizes the amount of traffic the network is able to accept, through minimizing the residual capacity in established lightpaths. The results suggest that it is feasible to preserve enough open capacity to avoid disruption of connections and blocking of future traffic demands...
This paper proposes a regenerator placement algorithm specifically designed for dynamic translucent optical networks, where lightpaths are dynamically routed along one of the multiple paths connecting each source destination pair. Just topology and physical layer information is exploited, while no traffic prediction is required.
Optical burst switching (OBS) was proposed as an alternative optical switching paradigm, in order to overcome the limitations of optical circuit and optical packet switching paradigms. In OBS networks, resource reservation protocol plays a key role for better resource allocation along the path from source to destination data transmission. In this paper, we focus and consider some of the relevant one-way...
For a given network physical topology and traffic pattern, our objective is to design the logical topology and the routing algorithm on that topology so as to minimize the Congestion. The virtual topology design problem is a mixed integer linear formulation. Heuristic algorithms for this problem where suggested to relax MILP problem such as Heuristic Topology Design Algorithm (HLDA), the minimum-delay...
An important problem in optical networking is to dimension the network: given the amount of traffic to carry, determine the required amount of network resources (wavelengths). In traditional scenarios, the traffic is specified in terms of a source-destination based traffic matrix. In an optical Grid scenario however, the anycast principle applies: users submit jobs, and generally do not care where...
In this paper, we present a survey comparing different deflection routing based techniques applied to optical burst switching (OBS) networks. For such study we consider the E-OBS architecture proposed in which is an advantageous solution for OBS networks since routing decision can be taken freely inside the network without constraints on the length of the path. Under this environment, several effective...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.