Presentation on theme: "Migration to All-IP Networks: Directions and Deployment"— Presentation transcript:
1 Migration to All-IP Networks: Directions and Deployment Customers’ EventCrete, May 2007Migration to All-IP Networks: Directions and DeploymentPresented by:Dr. Yuri GittikChief Strategy Officer
2 Outline All-IP” Networks: The Approach IP Transformation Focus on Access and MetroIncremental Deployment – Leveraging Existing Infrastructures
3 Towards “All-IP” Networks IP traffic prevails the applications– IP for voice and data servicesVoIP and soft-switches for voice servicesInternet access and IP VPN servicesPseudowire solutions for Ethernet and legacy Layer 1/2 servicesNew IP-based services: IPTV, N-playFixed-mobile convergence“Access-agnostic” services for wireline and mobile customersIMS SIP-based services (“push-to-x”)IP/MPLS infrastructureIP DSLAMs, PSN backhaul, metro and core networksIt’s all about money: €conomy- not technology!Reduced opex with high economy of scaleReduce the number of different networks and infrastructuresFlexibility with existing and new services
4 BT’s 21CN Network Evolution From multi-networks to a multi-service networkFewer network elementsSimpler service managementRapid implementation
5 Drivers for the 21st Century Network Power toCustomers – increased flexibility and greater reliabilitySpeed to Market- innovativeservicesInvesting now for future £1B annual cash savingsCost Transformation- significant reduction in operating costsforMoreLess
6 Migration to “All-IP” Networks: Still Open Issues IP transformationMaintain legacy traffic (mainly business and mobile)Focus on access and metroFrom DSLAM to MSANEthernet metroIncremental deployment – leveraging existing infrastructuresFirst of all, SDH infrastructureAnd many others…
7 Outline All-IP” Networks: The Approach IP Transformation Focus on Access and MetroIncremental Deployment – Leveraging Existing Infrastructures
8 IP Transformation: Legacy over PSN Network CoreAccess/BackhaulServices/CPELegacy Services Existing EquipmentATM DSLAMLegacyNetworksSDH, ATM2G BTS3G NodeBNew Services and EquipmentNewPacket-SwitchedNetworksGbE, MPLS, IPIP DSLAMIP RAN4G NodeBMaintain legacy traffic over new packet-switched infrastructuresTDM, ATM, voice, …A broad traffic range: residential and business services, 2G/3G mobile trafficDomestic and international coverage
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 tunnelsEmulation is performed by provider edge devices (PE)The individual service emulations in this approach are termed pseudowiresRAD pioneered “pre-pseudowire” TDMoIP in 1999 and leads the pseudowire standardization and implementationPW Encapsulation FunctionPW Encapsulation FunctionCustomerPremisesCustomerPremisesPEPECPEIP/MPLSAttachment CircuitNative ServiceAttachment CircuitNative ServiceCPEPWPW
10 Broadening the Pseudowire Approach Network SegmentAccessCoreN/AExtended Pseudowires/Emulation“Classic” PseudowiresIP/MPLSInfrastructurePlatformsEthernetIAD+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 RANCoreRevisionsControl EntityIub TNLIucs TNLIups TNLVoice CoreData CoreR99Separate RNCATMATM/TDMIP/MPLSRev.4IPRev.5ATM or IPRev.6Rev Not finalDistributed functionality between separate NodeB and RNCLTE: Rev.8+ Not finalNo separate control nodes
12 Mobile Backhauling: Towards IP-centric Infrastructure Milestone 1. Legacy (TDM and ATM-based) cellular voice+data traffic over PSN infrastructure including backhaulingPseudowire solutions with optional clock recoveryIncremental migration to “all-IP” and IMS solutionsMainly in the core, not backhaul infrastructure, yet with some impact on backhaulingMilestone 2. IP-based cellular voice+data traffic over PSN infrastructure including backhaulingRegular IP solutions with some cellular-specific implementationsIMS solutions are expanding into the multi-technology accessTISPAN is adding functional sub-system for enhanced control of network resources“Grey area”
13 Backhaul Evolution Towards IP Evolution stepsPre-provisioned (w/o control plane) traffic-agnostic transport (TDM, ATM)Pre-provisioned (w/o control plane) traffic-aware transportAbis optimization, data compression, …[Traffic-aware] transport with control planeNetwork control plane (IP/MPLS-based), optionally service-awareService control plane (IP/IMS-based)Next steps?Access “collapsing” when controller nodes (not entities!) are eliminatedFrom 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 MetroIncremental Deployment – Leveraging Existing Infrastructures
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 CPELow importance of fiber accessBasic services (voice, Internet access)Next Stage: Broadening the focusMore focus on business customersAccess over DSL and fiberMaintaining traditional services (leased lines, ATM)Dedicated smart NTU and multiservice CLE for new and traditional servicesCellular backhaul applicationsAnd now adding IPTV services…Just to add more details about FCD-155. This product allows to enhance SDH networks with NG ADM capabilities: GFP, virtual concatenation with LCAS.
17 To Ensure Really Multiservice MSAN Customer PremisesSingle/multipleCopper FiberIADPBXCO/POP3G NodeBEthernetMetroIP/MPLSATMAccessGatewaySingle/multipleCopperngDSLAMMSANTDM2G BTSRadio SiteCustomer PremisesNTU/CLEPBXFiberAdding a range of smart NTU/CLE products to the MSAN platformAccess over xDSL and fiber linksOptional pseudowire technologies to support legacy trafficMore focus on direct (fiber) access to Metro EthernetPoint-to-point and point-to-multipoint (GPON)
18 Ethernet Metro: Too Many Options? Ethernet over legacy networks (SDH, ATM)MPLS-based Ethernet metroNew alternative [emerging] technologiesTransport 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 servicesSmart termination and service demarcation are essentialEthernet OAM, traffic handling, protection, …E-NTU
19 Outline All-IP” Networks: The Approach IP Transformation Focus on Access and MetroIncremental Deployment – Leveraging Existing Infrastructures
20 Leveraging Existing Infrastructure Network CoreAccess/BackhaulServices/CPELegacy Services Existing EquipmentATM DSLAMLegacyNetworksSDH, ATM2G BTS3G NodeBNew Services and EquipmentNewPacket-SwitchedNetworksGbE, MPLS, IPIP DSLAMIP RAN4G NodeBHow to take advantage of existing infrastructures?Ethernet/IP services over:SDH: Ethernet over SDH (DTAG, Telenor, …)ATM: Ethernet over ATM (FT, DTAG, …)
22 Telenor: “All-IP 2010” Network DistributionEthernet/ngSDHCoreIP/MPLSHigher capacityFewer technologiesSeamless servicesIP-based service platform with open standards and common interfacesCommon service edgeEthernet interfacesAll access typesSDHPoint-to-pointradio or fiberAreas with late IP/MPLSdistribution rollout80xnodesBase StationEthernetCWDMExisting structure developed for telephoneMoving from narrowband to broadbandMoving from static allocation to flexibilityMoving from complexity to simplicityDSL will remain the dominating broadband technology in terms of volume.Wireless broadband will be used as complementary technology.Fiber to business locations will be deployed in established and new areas. FTTP will mainly be used in new build areas.Ethernet will be the dominating technology for connecting the access network to the distribution network,DSLDistributionFTTPFiberNew build areasVDSL2ADSLADSL2+SHDSLHigh capacity DSL areasCore routerDistribution routerDSLAM or Ethernet switchngSDH nodeAccess
23 Ethernet over SDH: Options Ethernet traffic (services) over pure SDH infrastructurengSDH, MSPP (Multi-Service Provisioning Platform)“Old generation” SDH with external Ethernet-over-SDH capabilitiesGFP, Virtual concatenation for “fat pipes”, LCAS, etc.Ethernet traffic over combined SDH & PSN infrastructuresHow to bridge two worlds in a most efficient way?EgateChannelizedSTM-1SDHMetroEthernetIP/MPLSGbE
24 SummaryVariety of “All-IP” networks implementation: “One size does not fit all”Increasing importance of intelligent multiservice access over diverse mediaMore technological alternatives are under way… driven by economics
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