ITU-T Workshop on Security Seoul (Korea), 13-14 May 2002 Telecommunication network reliability Dr. Chidung LAC.

Slides:



Advertisements
Similar presentations
MPLS and GMPLS Li Yin CS294 presentation.
Advertisements

Requirements Based Evaluation of BPL for Power System Sensing, Command and Control Applications Erich W. Gunther EnerNex Corporation
Object-Oriented Design and Implementation of Fault Management Function for MPLS network Sung-Jin Lim, Ryung-Min Kim, and Young-Tak Kim Advanced Networking.
APNOMS03 1 A Resilient Path Management for BGP/MPLS VPN Jong T. Park School of Electrical Eng. And Computer Science Kyungpook National University
All rights reserved © 2006, Alcatel Grid Standardization & ETSI (May 2006) B. Berde, Alcatel R & I.
1 Introducing the Specifications of the Metro Ethernet Forum.
SOA for EGovernment 1 Emergency Services Enterprise Framework: A Service-Oriented Approach Sukumar Dwarkanath COMCARE Michael Daconta Oberon Associates.
Optical Control Plane Activities in IETF and OIF L. Ong 9 July 2002 L. Ong 9 July 2002
Thema: Menü Ansicht, Master, Folien-Master 1 ITU - IP Telephony Workshop June Standards for IP-telephony P.A.Probst, External Relations Swisscom.
NTT 2002 © 1 General Principles and Requirements for OAM Functions July 10, 2002 Hiroshi Ohta (NTT, Q.3/13 rapporteur)
Q5/13: Network Interworking Including, IP Multiservices Networks
ITU-T Workshop on IP/Optical Chitose, 9-11 July 2002 Session Network Performance N eal Seitz, Chair SG 13/WP 4 IP Performance Specifications: Progress.
Network Protection and Restoration Session 5 - Optical/IP Network OAM & Protection and Restoration Presented by: Malcolm Betts Date:
International Telecommunication Union Practical Issues In Managing Optical Networks by Wesam Alanqar and Tammy Ferris ITU-T Workshop IP/Optical (Chitose,
ITU-T Solutions Session 2 – Switched Optical Networks Presented by: Stephen Shew Date:
Japan Telecom Information & Communication Labs
Satoshi NARIKAWA NTT (G.8032 Acting Co-editor)
1 The Metro Ethernet Forum Helping Define the Next Generation of Service and Transport Standards Ron Young Chairman of the Board
Slide title minimum 48 pt Slide subtitle minimum 30 pt Service Resiliency - ITU-T SG15 Q9 Activities Ghani Abbas Ericsson 25 th.,June, 2012 Geneva Workshop.
Multi-service Architecture: Evolution of Network Architecture Keith Knightson Khalid Ahmad Carrier Data Networks Nortel Networks, Canada IP-Networking/Mediacom.
Presentation to the Informal Forum Summit Meeting Geneva, Switzerland, 3-4 December 2001 David Drury President & Chairman
Data over Transport with ASON Session 12 – Optical Network Clients and Services Presented by: Stephen Shew Date:
0 - 0.
All rights reserved © 2005, Alcatel Grid services over IP Multimedia Subsystem  Antoine Pichot, Olivier Audouin, Alcatel  GridNets ’06.
Video Services over Software-Defined Networks
1 EL736 Communications Networks II: Design and Algorithms Class1: Introduction Yong Liu 09/05/2007.
Generalized Multiprotocol Label Switching: An Overview of Signaling Enhancements and Recovery Techniques IEEE Communications Magazine July 2001.
1 Quality of Service Issues Network design and security Lecture 12.
Chapter 9 Introduction to MAN and WAN
1 Improving TCP Performance over Mobile Networks HALA ELAARAG Stetson University Speaker : Aron ACM Computing Surveys 2002.
S Licentiate course on Telecommunications Technology (4+1+3 cr.) Course Topic Spring 2000: Routing Algorithms in the DiffServ MPLS Networks Introduction.
1 Introduction to Network Layer Lesson 09 NETS2150/2850 School of Information Technologies.
Addition 1’s to 20.
Protection and Restoration in Optical Network
1 EL736 Communications Networks II: Design and Algorithms Class3: Network Design Modeling Yong Liu 09/19/2007.
Optical communications & networking - an Overview
December 20, 2004MPLS: TE and Restoration1 MPLS: Traffic Engineering and Restoration Routing Zartash Afzal Uzmi Computer Science and Engineering Lahore.
Lappeenranta University of Technology Valery Naumov Telecommunications Laboratory Tel: “Why Do We Need WDM Networks?”
Asynchronous Transfer Mode (ATM)
Introduction to Protection & Restoration for OBS Copyright, 2000, SUNY, Univ. at Buffalo Presented by Zaoyang Guo & Dahai Xu.
A General approach to MPLS Path Protection using Segments Ashish Gupta Ashish Gupta.
Control and Traffic Management Paper: Banerjee et al.: ” Generalized multiprotocol label switching: an overview of signaling enhancements and recovery.
1 Introduction to Optical Networks. 2 Telecommunications Network Architecture.
NTNU Protection switching TTM1: Optical transport and access networks By Steinar Bjørnstad 2014.
Workshop IP/Optical; Chitose, Japan; 9-11 July 2002 OTN Equipment and Deployment in Today’s Transport Networks Session 5 Dr. Ghani AbbasQ9/15 Rapporteur.
May 2001GRNET GRNET2 Designing The Optical Internet of Greece: A case study Magda Chatzaki Dimitrios K. Kalogeras Nassos Papakostas Stelios Sartzetakis.
1 Protection Mechanisms for Optical WDM Networks based on Wavelength Converter Multiplexing and Backup Path Relocation Techniques Sunil Gowda and Krishna.
IST Project LION 2 Outline IST-project LION –Layers Interworking in Optical Networks –Overview – objectives –Testbed Progress: 2 examples –Recovery experiments.
November 18, Traffic Grooming in Optical WDM Networks Presented by : Md. Shamsul Wazed University of Windsor.
SONET Survivability Mechanisms CSC/ECE 772: Survivable Networks Spring, 2009, Rudra Dutta.
SMUCSE 8344 Protection & Restoration of Optical Networks.
Routing in Optical Networks Markus Isomäki IP and MPLS in Optical Domain.
1 Dynamic Service Provisioning in Converged Network Infrastructure Muckai Girish Atoga Systems.
CSC Survivability Anuj Dewangan Parinda Gandhi.
Survivable Traffic Grooming with Differentiated End-to-End Availability Guarantees in WDM Mesh Networks Proceedings of the 13th IEEE Workshop on Local.
(Slide set by Norvald Stol/Steinar Bjørnstad
1 Why Optical Layer Protection? Optical layer provides lightpath services to its client layers (e.g., SONET, IP, ATM) Protection mechanisms exist in the.
Section #7: Getting Data from Point A to Point B.
Challenges in the Next Generation Internet Xin Yuan Department of Computer Science Florida State University
1 Protection in SONET Path layer protection scheme: operate on individual connections Line layer protection scheme: operate on the entire set of connections.
RESILIENT PACKET RING NETWORK(RPR).  The nature of the public network has changed. Demand for Internet Protocol(IP)data is growing at a compound annual.
Multiprotocol Label Switching (MPLS) Routing algorithms provide support for performance goals – Distributed and dynamic React to congestion Load balance.
Prof.Veeraraghavan Prof.Karri Haobo Wang:
Network Survivability
The Business Value of MPLS VPNs
IP and NGN Projects in ITU-T Jean-Yves Cochennec France Telecom SG13 Vice Chair Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002.
Optical Layer Protection Schemes
Chapter 9. Circuit Switching
SURVIVABILITY IN IP-OVER-WDM NETWORKS (2)
Optical communications & networking - an Overview
Presentation transcript:

ITU-T Workshop on Security Seoul (Korea), May 2002 Telecommunication network reliability Dr. Chidung LAC

france telecom R&D 2 ITU-T Workshop on Security Seoul (Korea), May 2002 Outline Dependability and survivability Availability assessment Recovery mechanisms Physical layer ATM network IP level From random non-intentional to provocated failures

france telecom R&D 3 ITU-T Workshop on Security Seoul (Korea), May 2002 Dependability and survivability (1/2) Quality of Service Accessibility Service continuity SecurityEase of useBilling AvailabilityPerformances Degraded state Nominal state Survivability

france telecom R&D 4 ITU-T Workshop on Security Seoul (Korea), May 2002 Dependability and survivability (2/2) Unavailability Reliability Maintenance support Maintainability Traffic engineering System capacity Offered traffic Grade of service Failures Congestion Abnormal situations Natural disasters (Safety) Man-made events (Security) Dependability Network elements

france telecom R&D 5 ITU-T Workshop on Security Seoul (Korea), May 2002 Availability assessment methodology Identification of elements contributing to the services unavailability (equipments, cable infrastructure, OAM errors, …) Block diagram representation (series, parallel) of these elements taking into account network architecture (redundancy, …) Allocation of a failure rate and a repair time MTTR to each element Estimated values from equipments vendors ( ) Use of field data (, MTTR) Service unavailability and failure rate assessment

france telecom R&D 6 ITU-T Workshop on Security Seoul (Korea), May 2002 Availability assessment : example (1/2) Optical distribution frame Amplifier ADM Optical fiber WDM ADM

france telecom R&D 7 ITU-T Workshop on Security Seoul (Korea), May 2002 Availability assessment : example (2/2) ADM block diagram representation Unavailability and failure rate calculation U Board i = Board i * MTTR Board i U Serial system = U Board j U Parallel system = U Board k U ADM Serial system = i Parallel system = U 2 U 1 ADM

france telecom R&D 8 ITU-T Workshop on Security Seoul (Korea), May 2002 Pre-WDM networks protection Automatic protection switching

france telecom R&D 9 ITU-T Workshop on Security Seoul (Korea), May 2002 Pre-WDM self-healing rings (1/2) Unidirectional rings

france telecom R&D 10 ITU-T Workshop on Security Seoul (Korea), May 2002 Pre-WDM self-healing rings (2/2) Bidirectional rings

france telecom R&D 11 ITU-T Workshop on Security Seoul (Korea), May 2002 Pre-WDM meshed networks restoration Failure Around the failure Failure End-to-end Failure Local-destination

france telecom R&D 12 ITU-T Workshop on Security Seoul (Korea), May 2002 WDM rings protection 2-fiber bidirectional rings

france telecom R&D 13 ITU-T Workshop on Security Seoul (Korea), May 2002 WDM meshed networks (1/2) Link protection Dedicated approach Shared approach Failure or Failure

france telecom R&D 14 ITU-T Workshop on Security Seoul (Korea), May 2002 WDM meshed networks (2/2) Path protection

france telecom R&D 15 ITU-T Workshop on Security Seoul (Korea), May 2002 ATM network (1/2) ATM v/s SDH-SONET Bandwidth on-demand v/s no dynamic bandwidth control Bursty traffic v/s switched services, private lines Logical v/s physical path structure Variations of VPs and VCs capabilities (from 0 to the physical link rate) v/s fixed capacities Non-hierarchy v/s hierarchy path capacity Separation of capacity allocation and physical route assignment for VPs and VCs OAM bandwidth with allocation on demand delay reduction for restoration message exchange, quicker detection of system degradation Faster detection of soft failure

france telecom R&D 16 ITU-T Workshop on Security Seoul (Korea), May 2002 ATM network (2/2) Automatic protection switching VPs or VCs used as links (protection units) 1+1 : connection switching by the receiver side node (from working to backup link) 1:1 : switching done both by the transmitter side and the receiver side nodes Self-healing network Distributed control restoration scheme More effective resource utilization Dynamic planned scheme : flooding algorithm to locate restoration routes Preplanned scheme : predetermination of the optimal alternate route and pre-assignement of a backup VP to each VP

france telecom R&D 17 ITU-T Workshop on Security Seoul (Korea), May 2002 IP level Recovery mechanisms proposed for MultiProtocol Label Switching Architecture used : Integrated Services with Resource Reservation Protocol (signaling protocol) Differentiated Services Main recovery modes : Link protection 1+1 and 1:1 Path protection Restoration/rerouting : on-demand establishment of Label Switched Paths

france telecom R&D 18 ITU-T Workshop on Security Seoul (Korea), May 2002 From random non-intentional to provocated failures Telcos poor experience in the domain Example of assessment difficulty : how to apply mathematical failure rate distribution ? Possible directions : Infrastructures protection : security reinforcement Logical intrusion : main challenge with actuals networks interfunctioning (operators networks, Internet, …) Behavior modelling : human factors applied to volontary acts Some initiatives : Critical Infrastructure Protection cascading effects due to interdependencies among different domains IEEE DIREN02, New York, June 2002

france telecom R&D 19 ITU-T Workshop on Security Seoul (Korea), May 2002 To probe further IEEE Communications – Issue on Survivable communication networks, August 1999 IEEE Communications – Issue on Resilience in communication networks, January 2002 IEEE Network – Issue on Network and service security, Nov/Dec 2002 ITU-T, Rec. E.800, Terms and definitions related to QoS and network performance including dependability Network reliability steering committee, Alliance for telecommunications industry solutions, T1A1.2 WG on Network Survivability Performance, Reliability/availability framework for IP-based networks and services, Draft technical report, July 2001