Preplanned restoration of multicast demands in optical networks |
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| Authors: | Péter Soproni Tibor Cinkler |
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| Affiliation: | 1. Tohoku University, Sendai, Japan;2. Florida International University, Miami, FL, United States;1. MTA-BME Future Internet Research Group, Budapest University of Technology and Economics, Hungary;2. Inter-University Centre of Telecommunications and Informatics (ETIK), Kassai út 26, H-4028 Debrecen, Hungary;3. Dept. of Telematics, Norwegian University of Science and Technology, Norway;1. Bloomberg LP,731 Lexington Ave., New York, NY, 10022, USA;2. Dept. of Electrical and Computer Eng., Iowa State University, Ames, IA 50011, USA;1. School of Electronics and Information Engineering, Xi`an Technological University, Xi’an 710012, China;2. School of Electric and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore |
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| Abstract: | The evolution of multicast applications has speeded up. providers have to offer cheap and reliable services for their customers. One way to achieve this is to use a restoration method that provides relatively fast restoration calculated upon a failure, where nearly the minimal amount of resources is allocated. In this paper we propose a new, faster way of restoring multicast demands after link failure that is based on preplaning. We prove its optimality if a few preconditions hold. To do so a new formalization of the wavelength graph transformation (WGT) is presented. We show, based on simulations, that the beneficial properties of our method hold even when one or more preconditions are not kept. |
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