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NOBEL Technical Audit WP1 Objectives & Achievements March 08, 2006 Workpackage 1 Architectural aspects for end-to-end services Andrea Di Giglio NOBEL Objectives To define requirements, architecture and solutions for core-metro IPWP1 over-optical networks for broadband end-to-end services To study advanced network functionalities such as multi-layer traffic engineering and multi-layer resilience To make techno- and socio-economic analysis of core and metro case-studies To find packet/burst switching techniques and technologies To discover innovative solutions for the three network planes: management, control and transmission To define multi-service/multi-layer node architectures and to prototype the implementation of some selected node functionalities To assess existing technologies, components and sub-systems To integrate some test beds where to validate the project results All rights reserved © 2006, A. Di Giglio, TILAB 2 NOBEL Innovation To define requirements, architecture and solutions for core-metro IP-overoptical networks for broadband end-to-end services objective Main Areas State-of-Art and Open Issues Innovation by NOBEL 1. Network architecture and solutions for core metro In the last decade Network Providers largely deployed Sonet/SDH in core and metro transport networks. Further investments have been made in the last few years for introducing WDM point-to-point systems in the core long-haul networks. Nevertheless these network were basically designed for leased lines and voice service. Now all applications are migrating to IP. The NOBEL vision is based on ASON/GMPLS network solutions maybe integrated in the future with innovative burst/packet switching techniques. The NOBEL solutions will allow a full integration of data, voice and video transport (fixed and mobile) reducing costs, increasing the operational efficiency and improving the quality of end-to-end broadband services. 2. Multi-layer Network Advanced functionalities: Multi-layer network resilience A cohesive resilience approach is missing and this is causing in current multi-layer networks contentions among layers and inefficiencies. NOBEL is proposing multi-layer resilience solutions to optimize the allocation of network spare resources (thus reducing CAPEX), and to avoid contentions among layers. 2. Multi-layer Network Advanced functionalities: Multi-layer Traffic Engineering Current networks don’t allow an integrated multi-layer resource and QoS optimization, thus resulting in waste of CAPEX and reduced efficiency. NOBEL is proposing Multi-layer Traffic Engineering concepts to optimize resource and avoid congestions. 3. Network Management and Control Current networks are managed through long and rather unefficient provisioning procedures, with a negative impact on OPEX and Customers’ satisfaction. The NOBEL control plane solutions will allow automatic provisioning of connections and automatic network discovery (OPEX reduction). Also, the inter-working between control and management Planes will allow a more efficient management of the network. 4. Transmission aspects Until now, the full exploitation of (true) optical transparency has been prevented by the difficulty of the dynamic esthablishment of optical paths. The NOBEL control plane will enable the dynamic configuration and esthablishment of transparent, adaptive optical paths through the transport network. 5. Network Services Bandwidth on demand services are desirable but not easily compatible with existing network technology. The NOBEL control plane will enable the offering of a new class of services: e.g. Bandwidth on Demand and Dynamic Optical VPN network services, etc WP1 All rights reserved © 2006, A. Di Giglio, TILAB 3 WP1 detailed objectives to identify, from the perspective of the services as perceived from the end customer, the main drivers for the evolution of core and metro optical networks supporting end-to-end broadband services; to derive technical requirements from the above results; to define the architectural requirements for transparent core and metro optical networks; to define evolutionary network scenarios for a seamless inter-working between core, metro and access network segments for the transport and management/control planes; to identify cost-effective, high-quality architectures and network solutions based on an optimum combination of packets (such as IP, Ethernet,...) and circuits (such as SDH, OTN,...) thus collapsing/simplifying the network hierarchy; to study the functional requirements and the applicability of automatic provisioning, switching routing and discovery in multilayer/domain/service networks (for example in GMPLS); to contribute on the above issues to the related standardisation bodies (e.g. ITU SG15, OIF and IETF) All rights reserved © 2006, A. Di Giglio, TILAB 4 WP1 activities Analysis and definition of drivers and network requirements for core and metro networks supporting end-to-end broadband services for all Definition of network scenarios and solutions for core and metro networks supporting end-to-end broadband services for all Definition of requirements, network scenarios and solutions for extending optical transparency All rights reserved © 2006, A. Di Giglio, TILAB 5 WP1 Deliverables D6 - Preliminary definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all (M8) D11 - Preliminary definition of network scenarios and solutions supporting broadband services for all (M12) D21 - Definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all (M18) D30 - Definition of network scenarios and solutions supporting broadband services for all (M24) All rights reserved © 2006, A. Di Giglio, TILAB 6 WP1: working methodology (Y2) networks. Mesh mesh networks genete traffic traffic Generated TRAFFIC EVOLUTION ARCHITECTURE MODIFICATIONS ADVANCED NETWORK + DEVICES AVAILABILITY ROADM, OxC, etc. ROADM,OXC,etc. CONTROL PLANE CONTROL PLANE DEVELOPMENT DEVELOPEMENT Moredistributed distributed intelligence More intelligence Main applications’ requirements Main available network services Architectures for services Available & future technologies Important Bottlenecks Fixed-Mobile Convergence Network Scenarios Network project rules Network design All rights reserved © 2006, A. Di Giglio, TILAB 7 D21: “Definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all ” Environmental drivers - reflect changes that have been happening in the telecommunication business environment over the past decade and a half. In this period, the global telecommunications industry as a whole has been gradually moving away from the model of state-owned and/or regulated monopolies to that of a competitive industry operating in an open market Service/market drivers - reflect the continuously expanding set of capabilities and features customers in various markets demand to satisfy their constantly evolving set of personal and professional needs, as either end users of services (consumers) or intermediaries (wholesalers) who enhance the acquired services and offer them to their customers. Technology drivers - include all the technological enablers a service provider, in partnership with its vendors, can take advantage of in the process of architecting and composing its service portfolio. All rights reserved © 2006, A. Di Giglio, TILAB 8 D21: “Definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all ” QoS parameters Set up time Maximum delay Mean delay Packet loss rate High Network availability Medium Blocking probability BW Low < 0.1% > 99.99% <1s < 50 ms * < 5 E-5 < 0.1% > 99.9% <1s <1s * < 1 E-3 < 1% > 99% <3s <1s < 200 ms < 1 E-2 * * * * * * QoS Real time Streaming Legacy and Gaming IP telephony UMTS Transactional e-buy Best effort e-mail, domotics, VoIP Video conference, grid computing Remote backup, network supervision TV and Video Broadcast Telnet SAN p2p file exchange, Data acquisition VoD All rights reserved © 2006, A. Di Giglio, TILAB 9 D21: “Definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all ” data plane Customer view RC CC Network services (Nobel Classification since D6): RC CC RC CC Control plane ccc ncc ccc Public IP Business IP RC CC ccc RC CC VPN on layer 1 VPN on layer 2 VPN on layer 3 Customer created VPNs Provider created VPNs data plane Operator view data plane Customer view RC CC RC CC RC CC RC CC Control plane RC CC data plane Operator view All rights reserved © 2006, A. Di Giglio, TILAB 10 D21: “Definition of drivers and requirements for core and metro networks supporting end-to-end broadband services for all ” The migration toward the future transport infrastructure should protect and leverage current multi-service and IP networking investment to offer carriers a competitive advantage. IP-centric infrastructure and performance, providing an overall solution that delivers QoS support, traffic engineering capability, and robust control for IP networking is essential for the realization of the envisioned IP-orientation for capacity expansion and cost reduction. Efficient transport layers at Layer 2 and layer 1, allowing the necessary transport technology for the IP-centric infrastructure. The interworking of multi-service switched networks and IP routed networks, which coexist at both the access and backbone, demands a flexible, robust solution in the evolution phases. All rights reserved © 2006, A. Di Giglio, TILAB 11 D30: “Definition network scenarios and solutions supporting broadband services for all” Medium-term 2009-2010 End to End (SIP etc) Routing (signalling) Signalling per domain vendor specific signalling for restoration only End to End (SIP etc) Routing (signalling) Signalling End to End Signalling (routing) Per domain End to End (SIP etc) Per Domain Per Layer Per Domain Per Layer Per Domain Per Layer Per Domain Per Layer SDH MPLS L2/L1 IP/MPLS L2/L1 All rights reserved © 2006, A. Di Giglio, TILAB OTH Integrated Routing & signalling (End to End) Per Domain Across Layers Data plane NextGen. Layer L2 Control plane Ethernet Protocol agnostic adaptation SDH OTH Protocol agnostic adaptation Session IP Long-term 2011-2015 Mgmt plane Short-term 2006-2008 12 D30: “Definition network scenarios and solutions supporting broadband services for all” Term Year Focused network service evolution Network evolution 2006 - 2008 2009 - 2010 L1, L2, L3 VPN, Broadband on Demand Data aware control plane at multiple layers. Management integration across layers. Data aware control plane integration. Possibly migration towards OBS-like solutions in some areas of the network. Multilayer traffic engineering and resilience mechanisms L3 VPN Medium Increasing of mesh domains Data-aware data plane (IP and protocol agnostic L1 interfaces) Deployment of 40G technology. Dynamic wavelength routing. Vertically integrated control plane Short Increased bandwidth availability: increase of link and node capacity (with no dramatic change in architecture). Increased flexibility in the optical layer by ROADM. Increased optical transparency. Horizontal integration of the WDM layer by static by-pass of nodes. Migration to an initial mesh architectures, mainly realized by ROADMs; the mesh topology, probably appears as cells/ domains Fixed and mobile convergence over IP networks Single layer control plane implementations Next-generation SONET/SDH for sub-GigE services Ethernet transport L2, L3 VPN 2011 - 2015 Long All rights reserved © 2006, A. Di Giglio, TILAB 13 Key points of network vision The IP layer is the convergence layer of the core. Ethernet is a candidate for being convergence layer in access and metro segments. Ethernet services and Ethernet transport will become increasingly important. The NOBEL long term vision includes: • A fully integrated control plane (vertically and horizontally) based on the ASON architecture and the GMPLS protocols. • Optically transparent networks with wavelength routing (supporting LSPs with fibre and lambda encoding type). • GMPLS controlled L2 (Ethernet) switching OBS/OPS is part of an extended long term scenario All rights reserved © 2006, A. Di Giglio, TILAB 14 D30: “Definition network scenarios and solutions supporting broadband services for all” Bottleneck to solve Technology Options Reduction of complexity – today's plethora of IP/Ethernet as dominant technologies and protocols technologies must be reduced Reduction of OEO Reduction of OEO conversions order conversions in in order to reduce Optical transparency the numberthe of expensive to reduce number Optical transparency transponders of expensive The provisioning time of transponders bandwidth adjustment switching has to be reduced Discovering and (partly) control of network resources GMPLS/ASON control plane is done manually, therefore the cost of management is very high Complexity of management increases. Downtime of network in case of failures should be Resilience (self healing) minimized The cost per bit has to be reduced. Increase in transport efficiency e.g.: better modulation formats, optical Bandwidth utilization of burst/packet switching, higher packet-over-SDH is not bitrates, denser wavelength efficient. channels Need for fast and flexible bandwidth adjustment Influence on CAPEX OPEX A single dominant technology A single dominant technology will cause cost reduction due will reduce cost for training of to effect of large quantities the required qualified staff New services Seamless services can be created more easily, especially if IPv6 comes into play Broadband services Decrease of CAPEX neutral Broadband services (like Decrease of CAPEX since neutral (like L1VPN) less OEO L1VPN) lesssince OEO conversions are needed conversions are - needed Increase in CAPEX will be over-compensated by OPEX savings Massive savings due to easier installation procedures and easier management procedures - New hardware needed, Massive savings due to semimoderate increase of cost for automatic network operation software New services will be possible New hardware will be needed, neutral due to reduced price tag however, the relative cost for Flexible broadband services new equipment will be can be created reduced All rights reserved © 2006, A. Di Giglio, TILAB 15 D30: “Definition network scenarios and solutions supporting broadband services for all” Metro networks Icons meaning DSLAM GE-DBORN Aggregation ring Passive Optical Ethernet A/ D nodes IP/ MPLS service Router 1GE upstream I/ f (working+ protect.) 1GE downstream I/ f (working+ protect.) Pros Pros • Optical transparency • Multiplexing • Asymmetric Traffic • Reduction costs (about 15% on CapEx respects to RPR) • • High Scalability Very fast resilience (50ms) Cons • High costs Cons • Low scalability for shared media All rights reserved © 2006, A. Di Giglio, TILAB 16 D30: “Definition network scenarios and solutions supporting broadband services for all” Backbone networks Network Costs (CAPEX) Network Costs (CapEX) 350 IP/WDM IP/OTN 300 costs [cost units] 250 IP/WDM 200 150 100 50 0 X1 X2 X4 traffic trafficamount amount Routing transit traffic Routing transit traffic IP/OTN percentage of traffic switched by routers 80,00% IP/WDM IP/OTN 70,00% 60,00% 50,00% 40,00% 30,00% 20,00% 10,00% 0,00% X1 All rights reserved © 2006, A. Di Giglio, TILAB X2 traffic traffic amount amount X4 17 Conclusions WP1 reached the objectives defined for Year 2. – D21 and D30 completed the preliminary results presented on D6 and D11 on: • Characterization of emerging applications in terms of QoS parameters and requirements • Definition of L3-L2 and L1 network services for the end-to-end delivery of applications (according to certain QoS requirements) to the Customers (both residential and Business - Wholesale and Retailed) • Architectural guidelines for metro and core network for medium- and long- term evolution – Development of particular themes like: • Optical transparency • Virtual Private Networks – reinforcing EU position in Standardisation Bodies and Fora (ITU, OIF, IETF); creating a consensus view on a common European network vision with advanced and innovative solutions for B4all. The analysis of architectures and solutions will constitute an important share of NOBEL Ph.2 WP1, concentrating the effort in: – definition of architectural solutions for transport networks supporting both fixed and mobile services to perform a complete study on fixed and mobile convergence – Cost effective, flexible, scalable network architectures with new L2 (burst/packet) techniques. All rights reserved © 2006, A. Di Giglio, TILAB 18