Palestrante: Prof. Deep Medhi, Computer Science & Electrical Engineering Department, 

University of Missouri-Kansas City, USA

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For a number of years, multilayer networking has been a topic of great interest among researchers due to do the inherent nature of

multilayer topological structure in deployed networks. For example, there have been many works on IP over DWDM to show how IP raffic is carried over DWDM networks. Such works usually consider the design and interaction between two adjacent layers, namely P and DWDM. With the deployment of MPLS, there has been also work on IP/MPLS over DWDM.

 

A recent entrant to multilayer networking is OTN (optical transport network) technology. What OTN allows is to provide a digital wrapper functionality between IP and DWDM (which runs in analog mode), thus creating a three-layer network with IP/MPLS over  TN over DWDM.  Thus, with the introduction of OTN and its various modular capability at different rates, it becomes necessary to understand how a network can be designed when the multi-layer architecture is formed of three layers: IP/MPLS, OTN, and DWDM. Furthermore, since OTN allows the possibility to have sublayer signals that can be used for aggregation, there is a need to develop  odels that accurately capture such features. However, there has been very limited work on understanding how to design three layer  etworks such as IP/MPLS over OTN over DWDM.

 

With such multilayering, it is very important to understand how a failure may be propagated among the layers. In addition, a failure at the DWDM layer may percolate through both OTN and IP/MPLS layers because of dependency caused by shared risk link groups  SRLG). Thus, it is important to develop network protection model that can capture theses issues. 

 

Our work addresses a protection mechanism at each layer while considering the technological constraints of each layer to develop an  ntegrated protection design model, especially considering the OTN layer, which has not been explicitly considered before. We have developed an optimization model and a heuristic approach to observations based on varying several network parameters to  nderstand their impacts on protection capacity and the overall network cost. In particular, we will discuss the situations when  rotection is not incorporated in every layer.

 

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Deep Medhi is Curators' Professor in the Department of Computer Science and Electrical Engineering at the University of Missouri-  ansas City, USA. He received B.Sc. in Mathematics from Cotton College, Gauhati University, India, M.Sc. in Mathematics from the  niversity of Delhi, India, and his Ph.D. in Computer Sciences from the University of Wisconsin-Madison, USA. Prior to joining UMKC in  989, he was a member of the technical staff at AT&T Bell Laboratories. He was an invited visiting professor at the Technical  niversity  f Denmark, a visiting research fellow at Lund Institute of Technology, Sweden, and a Fulbright Senior Specialist. He is the Editor-in- hief of Springer’s Journal of Network and Systems Management, and is on the editorial board of IEEE/ACM Transactions on  etworking, IEEE Transactions on Network and Service Management, and IEEE Communications Surveys & Tutorials. He has  ublished over a hundred papers, and is co-author of the books, Routing, Flow, and Capacity Design in Communication and  omputer  etworks (2004) and Network Routing: Algorithms, Protocols, and Architectures (2007), both published by Morgan Kaufmann  ublishers. 

 

 

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Responsável: Prof. Dr. Nelson Luis Saldanha da Fonseca

IC / Unicamp

E-mail: nfonseca@ic.unicamp.br

Fone: (019) 3521-5878

 

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