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Migration to All-IP Networks: Directions and Deployment

Customers’ Event Crete, May 2007. Migration to All-IP Networks: Directions and Deployment. Presented by: Dr. Yuri Gittik Chief Strategy Officer. Outline. All-IP” Networks: The Approach IP Transformation Focus on Access and Metro

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Migration to All-IP Networks: Directions and Deployment

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  1. Customers’ Event Crete, May 2007 Migration to All-IP Networks: Directions and Deployment Presented by: Dr. Yuri Gittik Chief Strategy Officer

  2. Outline • All-IP” Networks: The Approach • IP Transformation • Focus on Access and Metro • Incremental Deployment – Leveraging Existing Infrastructures

  3. Towards “All-IP” Networks • IP traffic prevails the applications– IP for voice and data services • VoIP and soft-switches for voice services • Internet access and IP VPN services • Pseudowire solutions for Ethernet and legacy Layer 1/2 services • New IP-based services: IPTV, N-play • Fixed-mobile convergence • “Access-agnostic” services for wireline and mobile customers • IMS SIP-based services (“push-to-x”) • IP/MPLS infrastructure • IP DSLAMs, PSN backhaul, metro and core networks • It’s all about money: €conomy- not technology! • Reduced opex with high economy of scale • Reduce the number of different networks and infrastructures • Flexibility with existing and new services

  4. BT’s 21CN Network Evolution • From multi-networks to a multi-service network • Fewer network elements • Simpler service management • Rapid implementation

  5. More for Less Drivers for the 21st Century Network Power to Customers –increased flexibility and greater reliability Speed to Market - innovative services Investing now for future £1B annual cash savings Cost Transformation - significant reduction in operating costs

  6. Migration to “All-IP” Networks:Still Open Issues • IP transformation • Maintain legacy traffic (mainly business and mobile) • Focus on access and metro • From DSLAM to MSAN • Ethernet metro • Incremental deployment – leveraging existing infrastructures • First of all, SDH infrastructure • And many others…

  7. Outline • All-IP” Networks: The Approach • IP Transformation • Focus on Access and Metro • Incremental Deployment – Leveraging Existing Infrastructures

  8. IP Transformation: Legacy over PSN Network Core Access/Backhaul Services/CPE Legacy Services Existing Equipment • Maintain legacy traffic over new packet-switched infrastructures • TDM, ATM, voice, … • A broad traffic range: residential and business services, 2G/3G mobile traffic • Domestic and international coverage ATM DSLAM 2G BTS 3G NodeB Legacy Networks SDH, ATM New Services and Equipment New Packet-Switched Networks GbE, MPLS, IP IP RAN 4G NodeB IP DSLAM

  9. "Classic" Edge-to-Edge Pseudowires • Emulation of native Layer 1/Layer 2 services, such as TDM, Frame Relay, ATM or Ethernet, over a packet-switched core network (IP/MPLS) • Enables transport of a native service over IP/MPLS tunnels • Emulation is performed by provider edge devices (PE) • The individual service emulations in this approach are termed pseudowires • RAD pioneered “pre-pseudowire” TDMoIP in 1999 and leads the pseudowire standardization and implementation PW Encapsulation Function PW Encapsulation Function Customer Premises Customer Premises PE PE IP/MPLS CPE CPE Attachment Circuit Native Service Attachment Circuit Native Service PW PW

  10. “Classic” Pseudowires Extended Pseudowires/Emulation Broadening the Pseudowire Approach Network Segment Access Core IP/MPLS Infrastructure Platforms Ethernet IAD+DSLAM (MSAN) Note:Metro segment could be considered as a part of the access network, or, alternatively, associated with the core network

  11. 3GPP Development: More IP/MPLS RAN Core

  12. Mobile Backhauling:Towards IP-centric Infrastructure Milestone 1. Legacy (TDM and ATM-based) cellular voice+data traffic over PSN infrastructure including backhauling • Pseudowire solutions with optional clock recovery • Incremental migration to “all-IP” and IMS solutions • Mainly in the core, not backhaul infrastructure, yet with some impact on backhauling Milestone 2. IP-based cellular voice+data traffic over PSN infrastructure including backhauling • Regular IP solutions with some cellular-specific implementations • IMS solutions are expanding into the multi-technology access • TISPAN is adding functional sub-system for enhanced control of network resources “Grey area”

  13. Backhaul Evolution Towards IP  • Evolution steps • Pre-provisioned (w/o control plane) traffic-agnostic transport (TDM, ATM) • Pre-provisioned (w/o control plane) traffic-aware transport • Abis optimization, data compression, … • [Traffic-aware] transport with control plane • Network control plane (IP/MPLS-based), optionally service-aware • Service control plane (IP/IMS-based) • Next steps? • Access “collapsing” when controller nodes (not entities!) are eliminated • From Backhaul (radio sites-controller)+ Aggregation (controllers-edge node) to Access (radio sites-edge/core node)  ? ? ? ?

  14. Outline • All-IP” Networks: The Approach • IP Transformation • Focus on Access and Metro • Incremental Deployment – Leveraging Existing Infrastructures

  15. 21CN Network Architecture • CMSAN – Copper MSAN • FMSAN – Fiber MSAN

  16. ngDSLAM/MSAN: Typical Deployment Scenario • Initial Stage: DSLAM platform with strong focus on residential services (and optional PSTN migration) • Use standard commodity IAD and CPE • Low importance of fiber access • Basic services (voice, Internet access) • Next Stage: Broadening the focus • More focus on business customers • Access over DSL and fiber • Maintaining traditional services (leased lines, ATM) • Dedicated smart NTU and multiservice CLE for new and traditional services • Cellular backhaul applications • And now adding IPTV services…

  17. To Ensure Really Multiservice MSAN Customer Premises Single/multiple Copper Fiber IAD • Adding a range of smart NTU/CLE products to the MSAN platform • Access over xDSL and fiber links • Optional pseudowire technologies to support legacy traffic • More focus on direct (fiber) access to Metro Ethernet • Point-to-point and point-to-multipoint (GPON) PBX CO/POP 3G NodeB Ethernet Metro IP/MPLS ATM Access Gateway Single/multiple Copper ngDSLAM MSAN TDM 2G BTS Customer Premises Radio Site NTU/CLE Fiber PBX

  18. Ethernet Metro: Too Many Options? • Ethernet over legacy networks (SDH, ATM) • MPLS-based Ethernet metro • New alternative [emerging] technologies • Transport MPLS (T-MPLS) – Alcatel, more? • PBB-TE (former PBT) – Nortel, BT, NSN, (RAD?) • Yet a clear consensus on the requirements for end-to-end Ethernet services • Smart termination and service demarcation are essential • Ethernet OAM, traffic handling, protection, … E-NTU

  19. Outline • All-IP” Networks: The Approach • IP Transformation • Focus on Access and Metro • Incremental Deployment – Leveraging Existing Infrastructures

  20. Leveraging Existing Infrastructure Network Core Access/Backhaul Services/CPE Legacy Services Existing Equipment • How to take advantage of existing infrastructures? • Ethernet/IP services over: • SDH: Ethernet over SDH (DTAG, Telenor, …) • ATM: Ethernet over ATM (FT, DTAG, …) ATM DSLAM 2G BTS 3G NodeB Legacy Networks SDH, ATM New Services and Equipment New Packet-Switched Networks GbE, MPLS, IP IP RAN 4G NodeB IP DSLAM

  21. T-COM: Bottom Up from SDH

  22. Core router Distribution router DSLAM or Ethernet switch ngSDH node Telenor: “All-IP 2010” Network Distribution Ethernet/ngSDH Core IP/MPLS • Higher capacity • Fewer technologies • Seamless services • IP-based service platform with open standards and common interfaces • Common service edge • Ethernet interfaces • All access types SDH Point-to-point radio or fiber Areas with late IP/MPLS distribution rollout 80x nodes Base Station Ethernet CWDM DSL Distribution FTTP Fiber VDSL2 New build areas ADSL ADSL2+ SHDSL High capacity DSL areas Access

  23. Ethernet over SDH: Options • Ethernet traffic (services) over pure SDH infrastructure • ngSDH, MSPP (Multi-Service Provisioning Platform) • “Old generation” SDH with external Ethernet-over-SDH capabilities • GFP, Virtual concatenation for “fat pipes”, LCAS, etc. • Ethernet traffic over combined SDH & PSN infrastructures • How to bridge two worlds in a most efficient way? Egate Channelized STM-1 Ethernet IP/MPLS SDH Metro GbE

  24. Summary • Variety of “All-IP” networks implementation: “One size does not fit all” • Increasing importance of intelligent multiservice access over diverse media • More technological alternatives are under way… driven by economics

  25. Thank you for your attention Yuri Gittik yuri_g@rad.com www.rad.com

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