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Two high-level tutorials will be given by professors on Sunday October 7th, 2007 from 14:00 to 18:00 for a limited number of people.
Registration to these tutorials may be made via the on-line registration.
T1: Methods and Principles of Availability Analysis for Survivable Networks
By Wayne D. Grover, IEEE Fellow, Professor, ECE, University of Alberta, Canada and Chief Scientist, TRLabs, Network Systems
In the last decade much progress has been made on mechanisms and design methods for network protection or restoration. These are important advances, but customers and network operators often think about quality in terms of service availability. Obviously the attainment of single-failure survivability enhances individual service path availabilities, but what are the exact details? How do we quantify the link between network survivability and service path availability? Classical reliability and availability analysis are well established, but pertain mostly to static redundant system architectures. So how do we calculate availability when the network is agile and reconfigures itself after fully protecting a first failure? These aspects of networks that are survivable to single failures by design of their capacity and an embedded reconfiguration mechanism require new methods for availability analysis. And some surprising new concepts emerge. The tutorial will show for instance, why the speed of restoration hardly matters to availability: what really matters is the dual failure restorability of the network. In addition, we will see why 1+1 service duplication, despite its high redundancy, is not as high in availability as a priority path in an adaptive mesh network which has far less overall redundancy. Interactions between MTTR and network spare capacity in determining availability will also be developed. Safety factors in providing SLA guarantees will be covered. Specific methods of availability analysis for rings, 1+1, 1:N, SBPP, span restorable mesh and p-cycles will be given. Survivabilityrelated methods to support multiple availability classes, “first-failure protection, second-failure restoration” (1FP-2FR) and multiple Quality of Protection will also be covered. Basic concepts and methods of reliability and availability engineering of redundant systems will also be reviewed, before extending them to survivable networks. This includes reliability block diagrams, algebraic simplifications, tie paths, cut-sets, Markov methods, hidden series elements, etc. Two additional tangible benefits of attending the session include a handout copy of an 51 page previously unpublished book chapter by W. Grover on Availability Analysis and Automatic Protection Switching Systems and a copy of software tools developed at TRLabs for dual-failure analysis of mesh-restorable networks.
Wayne D. Grover is a world-recognized inventor, researcher, educator and consultant in the field of survivable networks and transport technology and network design in general. He is well-known in the DRCN community as the originator of novel networking concepts including the p-cycles and protected working capa cityenvelope concepts and for early work on self-organizing restoration mechanisms. He was also General Chair of DRCN 2003, and co-recipient of a DRCN 2005 Best Paper Award. He received the B.Eng. degree from Carleton University, Canada, an M.Sc. (Telecommunication Systems) from the University of Essex, U.K., and the Ph.D. degree from the University of Alberta. He had ten years of experience at BNR (now Nortel Networks) on fiber optics, switching systems, digital radio, and other areas before joining TRLabs as its founding Technical VP. He now serves as Chief Scientist—Network Systems, TRLabs, and as Professor, Electrical and computer Engineering, at the University of Alberta. He has 32 patented inventions and “highly cited” papers in clock distribution, error-correction coding for fiber optics, digital subscriber loops, and transport network design and survivability. He is a recipient of the IEEE Baker Prize Paper Award and IEEE Fellow cited for work on survivable and self-organizing networks. Among other awards are the IEEE Canada Outstanding Engineer Award, the Alberta Science and Technology Leadership Award, and the the prestigious NSERC Steacie Fellowship. He has received TRLabs Technology Commercialization Awards for the licensing of restoration and network-design-related technologies. He is also author of Mesh-based Survivable Networks, Prentice-Hall PTR, 2004 and a coauthor of Next Generation Transport Networks, Springer Science, 2005.
T2: Ethernet: beyond the LAN?
By Dr. Didier Colle, UGent (INTEC)-IBBT-IMEC (Belgium)
Currently several activities are ongoing for making the Ethernet technology carrier-grade. This tutorial will give a comprehensive overview of these evolutions and will sketch some scenarios on how to deploy Ethernet in the MAN or the WAN. The tutorial will also briefly recapitulate the state-of-the-art in the Ethernet technology as currently deployed in the LAN for those who are unfamiliar with the Ethernet basics.
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The tutorial will address following topics:
1. State-of-the-art in Ethernet technology: what does the Ethernet technology look like as currently adopted in the LAN? What makes Ethernet that attractive? What are its current limitations?
2. Connectionless Carrier-grade Ethernet solutions: what are the connectionless solutions pushed forward in standard bodies (e.g., PB, PBB, SP-Bridges, TRILL)? What are the pros and cons of these solutions? For what applications/services are connectionless carrier-grade Ethernet solutions well suited (e.g., TV broadcast, nVoD, vVoD, VPN, etc)?
3. Connection-oriented Carrier-grade Ethernet solutions: In analogy with the topics on connectionless carrier-grade Ethernet, following issues will be looked at. What are the connection-oriented solutions pushed forward in standard bodies (e.g., PBT, ELS, VLAN XC, T-MPLS)? What are the pros and cons of these solutions? For what applications/services are connectionless carrier-grade Ethernet solutions well suited (e.g., internet access, iVoD, VPN, etc)?
4. Ethernet in the access/aggregation network: what does the network architecture look like (e.g., mixture of both connectionless and connection-oriented modes)? What are potential issues to be addressed when deploying Ethernet in the access/aggregation network (e.g., addressing, OA&M capabilities, resilience support, DSLAM capabilities, etc)?
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Didier Colle received a M. Sc. degree in electrotechnical engineering (option: communications) from the Ghent University in 1997. Since then, he has been working at the same university as researcher in the department of Information Technology (INTEC). He is part of the research group INTEC Broadband Communication Networks, IBCN
, headed by prof: Piet Demeester and part of the newly founded Interdisciplinary Institute for Broadband Technology, IBBT
. His research lead to a Ph.D degree in February 2002. He was granted a postdoctoral scholarship from the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen) in the period 2003-2004. Together with Prof. Mario Pickavet, he is responsible for the research on novel network architectures and techno-economic studies within the IBCN research group. He is and was member of a few technical program committees. He has been representing Flanders (Belgium) as member of the COST technical committee TIST and is currently acting as expert for the COST domain ICT.
His research deals with issues like multi-layer networks, optical networks (both circuit and packet switching), carrier-grade Ethernet networks, network survivability, traffic engineering, control plane issues, network dimensioning, cost modeling, etc. Up till now, he has actively been involved in several IST projects (LION, OPTIMIST, DAVID, STOLAS, NOBEL and LASAGNE), in the COST-action 266 and 291, in the ITEA/IWT TBONES and the CELTIC/IWT TIGER project. His work has been published in more than 100 scientific publications in international conferences and journals.
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