Analysis of traffic engineering information dissemination strategies in PCE-based multi-domain optical networks

• Main Authors: Spadaro, S, Perelló, J, Hernandez-Sola, G, Moreno, A, Agraz, F, Comellas, J, Junyent, G
• Format: Conference Proceeding
• Language: English
• Subjects: Computer networks; Electronic mail; Enginyeria de la telecomunicació; Enginyeria del trànsit; Information analysis; Multi-domain; Network topology; Optical communications; Optical fiber communication; Optical fiber networks; Path computation element; Routing; Scalability; Telecommunication traffic; Telecomunicació òptica; Tellurium; Topology abstraction; Traffic engineering; Àrees temàtiques de la UPC
• ISSN: 2162-7339
• DOI: 10.1109/ICTON.2010.5549261

This paper presents and compares different TE information dissemination strategies between Path Computation Elements (PCEs) in multi-domain optical networks. In such network context, recent studies have found that path computation only with local domain visibility yields poor network performance. Accordingly, certain visibility between domains seems necessary. Aiming to fit the confidentiality requirements of the composing domains while improving the final network blocking probability, novel link aggregation techniques have been proposed, which summarize the state of network domains resources efficiently. This aggregated link information is afterwards disseminated to all the remainder domains in the network. To this end, we introduce different update triggering policies to make a good trade-off between routing information scalability and inaccuracy. The performance of all contributions has been supported by illustrative simulation results.