Virtual topology reconfiguration For optical wdm mesh networks

Abstract

Optical fiber providing large bandwidth with low transmission loss newlineis the solution to the high bandwidth demand of todays data centric newlinebandwidth intensive applications Wavelength Division Multiplexing WDM newlinetechnology exploits the large bandwidth available in an optical fiber by newlinesimultaneous transmission of optical signals on different wavelengths over a newlinesingle fiber There is an extensive deployment of wavelength routed circuit newlineswitched optical WDM networks in telecommunication networks Routing in newlinethe optical domain is carried out using Optical Cross Connects OXC newlineIn a wavelength routed optical network it is possible to establish newlineLightpaths which are all optical paths between the source and destination node newlinePairs The traffic over a lightpath is carried without any Optical Electronic newlineOptical O E O conversions at the intermediate nodes The nodes between newlinewhich a lightpath is established will become neighbours irrespective of their newlinephysical locations The set of all lightpaths forms the virtual topology which newlineis the topology seen by the higher layers of the network The virtual topology newlineis designed to optimize the network performance The traffic demand in the newlinenetwork is dynamic newline newline