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Internet and Telecom Network Integration in 1999

Explore the technology behind the interconnection of the internet and telecom networks in 1999, covering topics such as internet access, multi-service switching, and different network types.

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Internet and Telecom Network Integration in 1999

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  1. 인터넷과 Telecom망의 연동 기술 1999. 2. 4. ETRI MPLS시스템팀 전 병천

  2. 순서 • Internet Access over Public Networks • Multi-service Switching Architecture • Next Generation Public Network

  3. Data Network (F/R,X.25) 인터넷 액세스 형태 ISP Network Backbone Network Headend Carrier Network DSLAM Access Network 광가입자 망 CATV PSTN/ISDN 전용선 F/R X.25 xDSL PSTN ISDN LAN Cable Modem 가정 가입자 기업 가입자 전용선 F/R X.25 ADSL PSTN ISDN CATV 56K~155M 56K~2M ~56K ~155M 1M~8M ~56K ~128K 10~30M

  4. Roles in the Internet Market Access Server Application Server Public Telecom Network ISP’s View Internet User Internet Service Provider or Corporate Intranet Telecom Operator Access Server Application Server Public Telecom Network Telco’s View Internet Access Service Provider (Telecom Operator) Internet User Internet Service Provider or Corporate Intranet Ericsson Review 1998

  5. Corporate Intranet PSTN Data Network (FR/ATM) xDSL ISP Network Access Server Mobile ISP POP Network Topology for Internet Access Teleco Network - Residential User - Business User

  6. ISP-1 ISP-2 ISP-3 Dial-up and xDSL Access PSTN/ISDN IAS Modem POP POP Data Network POP DSLAM ADSL Modem IAS: Internet Access Server DSLAM: DSL Access Multiplexer

  7. Data Network Data Network 이용형태 - Internet access - Intranet 구축 56K~2Mbps Frame Relay ATM - Internet Access Server - DSLAM Access Router - Cable Modem Access Server - Remote Access Server(RAS) - Enterprise Access Router - ISP POP Network Provider Area 2~622Mbps FR-ATM Interworking - Network Interworking - Service Interworking

  8. ISP Network Case 1 ATM/SONET/FR/Etc. ISP Network Network Service Provider ATM/SONET/FR Internet Service Provider Network • ATM based Data Service • Data Network • ISP Network • Access Protocol • ATM PVC • Classical IP over ATM • NHRP • MPLS Case 2

  9. ATM+IP related functions ATM only function IP Service Models Overlay Model o Traffic driven shortcut - QoS problem - Signaling overhead o Protocol - LANE, MPOA - IPOA, NHRP PVC Integrated Model o Topology/traffic driven shortcut - Closely related with ATM QoS - Minimize control overhead o Protocol - MPLS, I-PNNI, PAR

  10. Average Duration of Internet Calls ISS’97 Notel Bellcore 1997

  11. Internet Traffic Impacts on Carrier Networks • Increased call blocking • Increased dial-tone delay • Increased cost/little revenue Internet Local Switch Tandem Switch Local Switch ISP POP Internet Traffic Voice Traffic Local Switch

  12. Internet Traffic Offload Architecture Tandem Switch Trunk Distributed Approach IAS Packet Network ISP POP Internet IAS Local Switch IAS: Internet Access Server Tandem Switch Trunk Centralized Approach Internet Access Server ISP POP Internet Packet Network Trunk for Internet Traffic Local Switch

  13. Centralized Approach(Bellcore) Local Switch SS7 No.7 Signaling Netwok ISP POP Internet SS7 ICR Node - Call routing - Traffic Management - Call setup Signaling gateway Trunk T1/E1 Call Controller ICR: Internet Call Routing Packet Network PSTN (Circuit Switching) Internet Access Server Data Network (Packet Switching) Source: Bellcore

  14. IP-PSTN/ISDN Integration PSTN/ISDN Switch Central Office Switch Core Internet Internet POP Server Call Control Internet Processing Application Subscriber data

  15. Hybrid Network Service • Subscriber Controlled Input via Internet • E-Mail Waiting Indication • Call Completion on Internet-busy • Call Waiting Internet • Call Set up from an Internet session • VoIP service with simplified access authentication, and charging methods of the local exchange

  16. xDSL Application Areas Applications Internet Service Provider Individual User Internet Access Telecommuting LAN Extension Small Business Corporate Network Telco Network DSL Service Aggregated Traffic Branch Office

  17. xDSL Customer Premises Telco or PTT (NAP) ISP, Corporate LAN (NSP) DSL local loop DSLAM: DSL termination, ATM aggregation Backbone: ATM/SONET cell transport, Layer 2 Aggregation Remote Access Server: routing, security Internet, Private LANs, Local Servers DSL Line Encoding ATM Signaling and ILMI Data Encapsulation, Traffic Shaping, Security Flow Control, Application Software, Content

  18. xDSL Encapsulation PC xDSL Modem Local Loop Ethernet Bridging Application Software RFC 1483 Ethernet Packet Forwarding TCP/IP Ethernet AAL5/ATM Ethernet ADSL IP Routing Application Software Encapsulation IP Packet Forwarding TCP/IP Ethernet AAL5/ATM Ethernet ADSL Application Software End-to-End ATM Connection TCP/IP ATM Cell Forwarding Encapsulation AAL5/ATM25 ATM25 ADSL

  19. Router(ISP-2) IP/PPP L3/L2 LLC/SNAP AAL5 ATM PHY (SDH) PHY ISP Selection • Fixed ISP connectivity • PPP over ATM DSLAM PC Router xDSL Modem ATM xDSL IP L3/L2 IP Ethernet LLC/SNAP LLC/SNAP Ethernet AAL5 AAL5 PVC ATM ATM ATM ATM PHY PHY PHY (xDSL) PHY (xDSL) PHY (SDH) PHY (SDH) PHY Router(ISP-1) PC IP/PPP ATM Switch xDSL Modem DSLAM AAL5 SVC SVC ATM ATM ATM ATM ATM PHY (25M) PHY (25M) PHY (xDSL) PHY (xDSL) PHY (SDH) SDH xDSL ATM25 Router(ISP-3)

  20. Ethernet PHY AAL5 ATM PHY (xDSL) ISP Selection • PPP with ISP selection Telco Network ISP-1 DSLAM PC Router xDSL Modem ATM Network ISP-2 ATM xDSL ISP-3 PC IP IP Router PPP PPTP L2TP PPTP TCP UDP xDSL Modem TCP IP IP IP Ethernet DSLAM Ethernet AAL5 AAL5 PVC ATM ATM ATM ATM PHY PHY (xDSL) PHY (SDH) PHY (SDH) PHY

  21. Multiservice Switching Architecture • ATM-capable Multiservice Switching System Architecture • Architecture that separates the control and user/data plane • Open intra-switch interfaces Source: MSF

  22. Multiservice Switching System • Support integrated voice, video, data, and multimedia switching and call processing • Suitable for high availability networks • Scalable to large port counts, aggregate bandwidth and high transaction rates • Support a broad range of ATM-capable, reserved bandwidth, guaranteed QoS connection types • Define a consistent set of protocols for controlling and interworking services, including voice, ATM PVCs/SVCs, Frame Relay PVCs/SVCs, IP, etc. • Support the development of more efficient and flexible networks Source: MSF

  23. Multiservice Switching and Controller-Switch Interface VSI(Virtual Switch Interface) Source: MSF

  24. Controller-Switch Interface Protocol Stack Transport Voice IP Switching Fabric ATM Frame Relay CES Voice(POTS/PRI) IP Controlled Elements TDM IP ATM COPS MPLS IS-IS BGP VSI Adaptation Extension VoATM Extension Controlling Protocols MGCP UDP TCP Communications Infrastructure IP LLC/SNAP ATM/AAL5 Ethernet 10/100/1000Mbps Physical Layer(STM1, STM4, …) Source: MSF

  25. Requirements of Controller-Switch Interface • Standard at the physical, link, and network layer • Secure communication between the controller and the Switching/Adaptation Plane complexes • High throughput • Low latency • Easy to parse • Support for redundant physical interfaces • Remotely manageable • Widely implemented on computing platforms • Operating system and machine independent

  26. Virtual Switch Interface (VSI) protocol • Connection Processing • Support for pt-pt, pt-mpt, and mpt-pt connection types • Support for all ATM Forum and MPLS connection types • Support for multiple services • Allow implementation of multiple independent services on single switching element • Supports multiple QoS types • Resynchronization • Controller/Switch Independence

  27. Controller Controller VSI Master VSI Master VSI Resource Management VSI Slave Resource Management VSI Slave Switch Interfaces Categories of VSI Messages • VSI Messages • Connection Requests • Connection Request Responses • Interface Information • Switch Information • VSI over ATM • LLC/SNAP Encapsulation • Default Channel: VPI=0, VCI=40+slave-id Source: MSF

  28. Multi-Service Network ATM, Frame Relay, VPN, Internet • Multi- Service switches incorporate IP engines for integrated IP processing • Advanced buffer management and link scheduling capabilities enable QoS promise to become a reality

  29. End- to- End QoS Using A Multi- Service Network • QoS is managed as an End- to- End basis • Virtual leased line services offers support for legacy networks • Cut- through of voice enables toll quality for public communications • Low priority traffic can be guaranteed a minimum throughput

  30. Common ATM Trunking • Service Provider Benefits • Higher multiplexing gain and bandwidth efficiencies • Bandwidth cost savings (especially internationally) • Common platform for interconnections (via Standards) • Trunking uniformity for different Quality of Services • Higher trunking capacity to support higher-speed customer access • Customer Benefits • Better performance at lower cost • Potentially more services and features (Quality of Service) • Easier migration and interconnectivity • Global seamless services (BT, MCI, Concert, Stentor, Avantel) • Consolidation of services under consistent performance

  31. Network Requirements for Multi-services • Maximize Control • QoS(Quality of Service) • Security • Reliability/Availability • Minimize Cost • Use statistically shared WANs • Consolidate links • Use bandwidth efficiently • Virtual Private Networks • Layer 2 VPN: ATM, Frame Relay • Layer 3 VPN: IP VPN

  32. Integrated Virtual Private Network Enterprise Customer - Proof of SLA(Service Level Agreement) Service Provider Network Operations Center ISP Customer - VPN Control CNM Gateway CLEC Customer - Outsourced Network Control Source: NGN’98

  33. Next Generation Internet • Leased line access via switch ports. Carrier class remote access servers • Label Switching(MPLS) • IP aware switched core • High degree of QoS

  34. Internet Traffic Terabyte/day • 인터넷 트래픽의 급격한 증가 • 인터넷에 의한 텔코 서비스 잠식 • Voice, Fax • 기업망 데이터 서비스 • 새로운 망 구조 요구 • DWDM, ADSL, Terabit Router Source: ATM Year’98 AT&T

  35. Integrated IP-ATM Approach Source: NGN’98

  36. Hybrid Backbone Network - Best-effort IP Services - Differentiated IP services - IP VPN, VoIP - Cell relay - Frame relay - Voice, video IP over SDH/WDM IP over ATM Telco Services Network Services ATM IP SDH WDM Optical Fiber

  37. 망 구성 방안 IP over SDH/WDM 트래픽이 매년 200~300% 증가 신속한 망 구성 IP 백본 수익성 위주의 Premium 가입자 트래픽 처리 ATM Backbone Network IP over ATM ATM 백본 액세스 ATM PSTN ISDN FR 전용선 xDSL

  38. Next Generation Networks Will... • Be MultiService (ATM, Frame Relay, IP, Circuit) • Support high degrees of QoS/CoS • Be end-user manageable • Be designed for high-speed transport • Integrate WDM, ATM, Frame Relay and IP technologies • seamlessly

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