Author : Shruthi Harve
Publisher :
ISBN 13 : 9781124219639
Total Pages : pages
Book Rating : 4.2/5 (196 download)
Book Synopsis Optical Multicasting in Multi-Line-Rate Ethernet-over-WDM Backbone Networks by : Shruthi Harve
Download or read book Optical Multicasting in Multi-Line-Rate Ethernet-over-WDM Backbone Networks written by Shruthi Harve and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ethernet is the dominant technology for local-area networks (LANs) due to its simplicity, flexibility, and cost efficiency. In order to carry Ethernet traffic over backbone networks of metropolitan-area networks (MANs) and wide-area networks (WANs), the current mode of operation requires the conversion of Ethernet signals to technologies used by the backbone networks using complex and expensive equipment. In order to avoid this sort of unnecessary conversion, efforts are now under way to extend the usage of Ethernet from LANs to carrier-grade Ethernet in backbone networks of different service providers, and to provide a unified platform for transporting traffic. With the advent of muticast applications such as Internet Protocol TV (IPTV) and Video-on-Demand, there is a need for techniques to efficiently route multicast traffic over Ethernet backbone networks. Here, we address the problem of Routing and Wavelength Assignment (RWA) of a set of multicast requests in a Multi-Line-Rate (MLR) Ethernet backbone network with the objective of minimizing the cost of setting up the network, in terms of the Service Provider's Capital Expenditure (CAPEX). We present an Auxiliary Graph-based heuristic algorithm that routes each multicast request on a light-tree structure, and assigns minimum-cost wavelengths along the route. The algorithm utilizes the flexibility extended by MLR wavelength-division-multiplexed (WDM) optical networks used to construct the Ethernet backbone, by re-using channels, and using appropriate weight-assignment schemes to make a cost-efficient choice of wavelengths. We compare the properties of the algorithm to the optimal solution given by a mathematical model formulated as an Integer Linear Program (ILP), and show that they compare very well for small networks. The algorithm is tested on bigger networks, and it is shown that the algorithm is most cost-effective when the incoming traffic requests are processed in descending order of their bandwidth requirements, while using the linear weight-assignment scheme with volume discount.
