Design of Wavelength Division Multiplexed Networks for Delay-Bound Multicasting

摘要

We address the problem of real-time delay-bounded multicasting in wavlength-division multiplexed networks, to avoid problems of synchronization between video and audio frames. We describe a technique to synthesize WDM network topologies that can. with a very high degree of confidence, assure that the multicast traffic is delivered in user-specified limits on time. Unlike existing approaches to WDM network design, we first find a virtual topology that can meet the delay constraints. An embedding of virtual links into physical link is then carried out, followed by an assignment of wavelengths to virtual links. Our design paradigm can accommodate both the design styles that have existed in the past, namely, those that use the wavelength continuity principle and those which make use of wavelength converters. We describe quantitative and qualitative results obtained by using our software tool on several benchmark examples.