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IPTV-01: How To Implement IPTV Networks Franchesca Walker Director, Enterprise Solutions Foundry Networks, Inc

IPTV-01: How To Implement IPTV Networks Franchesca Walker Director, Enterprise Solutions Foundry Networks, Inc. Table of Contents. IPTV, Multi-Play Service Bundle: Why, What? Components of an IPTV Network IPTV Network Demands Designing An IPTV Capable Network Closing Thoughts.

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IPTV-01: How To Implement IPTV Networks Franchesca Walker Director, Enterprise Solutions Foundry Networks, Inc

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  1. IPTV-01: How To Implement IPTV NetworksFranchesca WalkerDirector, Enterprise SolutionsFoundry Networks, Inc

  2. Table of Contents • IPTV, Multi-Play Service Bundle: Why, What? • Components of an IPTV Network • IPTV Network Demands • Designing An IPTV Capable Network • Closing Thoughts

  3. IPTV,Multi-Play Service Bundle:Why,What?

  4. Challenges Facing Telcos Today • Increasing competition from cable operators • Voice is close to free • Need to reduce customer churn • Develop ways to grab a greater share of the customer wallet • Cautious capital outlays after the bursting of the bubble

  5. IPTV: A Silver Bullet For Telcos? • The good news of high broadband adoption • >181 million broadband subscribers in OECD countries * • Value-added services possible through IPTV • Single bill for consumers • Extensive data on user viewing habits • Targeted ad insertion increases appeal to advertisers • More for less • Better utilization of installed infrastructure conserves cap-ex and op-ex • Telco operators have been busy pursuing a FTTx strategy to facilitate higher speeds to the consumer * Source: OECD Broadband Statistics

  6. Components of an IPTV Network

  7. BNG BNG Reference Architecture for IPTV SHE for national content insertion POP RHE Aggregation Ring Access Ring National Network for Content Distribution Access Ring Aggregation Ring RHE Access node (PON OLT, DSLAM) Legend RHE: Regional Head End SHE: Super Head End Media Server Farm POP Interaction with network (E.g. Multicast Join/Leave) Middleware client-server interaction

  8. Major Players In The IPTV Market Today

  9. IPTV Network Demands

  10. IPTV Network Demands (1 of 3) • Need for high bandwidth • Standard Definition (SDTV) video: • Requires about 4 Mbps per stream (MPEG-2) • High Definition (HDTV) video: • Requires 14-18 Mbps per stream (MPEG-2) • Importance of latency • High latency negatively affects user experience directly: • IPTV involves procedures such as DRM authorization, channel zapping, • Interactive applications such as VoD, content search under interactive TV / network PVR etc. • IGMP Join Latency

  11. IPTV Network Demands (2 of 3) • Quality of Service • IPTV co-exists with other services such as high-speed Internet access, VoIP and interactive gaming • Optimization of channel change time in some middleware by sending a burst of unicast traffic before streaming multicast traffic • Wire-speed performance without packet loss an absolute requirement • Resiliency • Subscriber’s expectations of high availability are table stakes • High Density • Trend in access networks: compact platforms close to the subscriber

  12. IPTV Network Demands (3 of 3) • Future-proof Infrastructure • IPTV is expected to accelerate the shift to IPv6 • Flexibility in Service Delivery Models • Centralized transport through a BRAS • Network Infrastructure Security • Detect and prevent malicious attempts to take over the network

  13. RHE Media Server Farm Sequence Of Actions During A Channel Zap Operation • Channel zap/channel surfing has an important bearing on user experience when watching IPTV Access + Aggregation Network 1 Multicast stream User changes channel to watch the new channel 2 3 IGMP Leave of old channel IGMP Leave Latency 4 Stop multicast of old channel 5a Digital Rights Management Checks for new channel 5b DRM response 6a IGMP Join of new channel 6b Issue IGMP Join / PIM Join through Network if needed IGMP Join Latency 7 New Multicast stream New channel delivered to user TV Set-top box processing delays (e.g. jitter buffer delay, MPEG decoder delay etc) 8

  14. Problem Statement for IPTV Networks • How do we economically scale and future-proof aggregation networks to ensure high performance guarantees? • Many aggregation networks built to date have focused on best-effort service delivery • What happens if the above is not met? • Packet loss due to poor router/switch performance has visibly negative effects Example of a pixelized image (Source: Packet Loss Recovery for Streaming Video, http://nms.csail.mit.edu/papers/pv2002.pdf)

  15. Designing An IPTV Capable Network

  16. Major Design Considerations: Access Network (1) • Access considerations: • Access technology • Bandwidth available per home • Number of TV channels • # of concurrent channels per subscriber • Bandwidth per service type per subscriber • Delivery mechanism to the subscriber. Popular choices: • N PVC:1 VLAN model with different services over a single VLAN • N PVC:1 VLAN model with unique VLAN per service • 1 PVC:1 VLAN model: Each service of each subscriber mapped to a unique VLAN • All of the above models assume 1 ATM PVC to the subscriber.

  17. Major Design Considerations: Access Network (2) • Subscriber management and encapsulation. 2 most common choices: • DHCP • PPPoE for data with IPTV traffic delivered over a separate VLAN. • Increasing number of IPTV deployments are moving away from PPPoE to DHCP for data service also • For operators currently using PPPoE, a recommended approach: • Use of PPPoE for data service only • Use DHCP for video and voice traffic

  18. Major Design Considerations: Aggregation Network (1) • Aggregation choices: • Access-Aggregation Network interface • Layer 2 or Layer 3 network? • Layout of the network • Location of video content • Bandwidth needs: • Number of broadcast/premium TV channels to be offered over the network • Amount of unicast-based services expected in the network • Using oversubscribed equipment not a good idea

  19. Major Design Considerations: Aggregation Network (2) • Expected viewer habits: • Are some channels heavily watched? If yes, always have these channels delivered to the access node • Premium channels requested on demand • Desired resiliency: • Fast SONET-like (sub-50 millisecond) resiliency? • Are redundant links to access node desired? • Multicast redundancy • Security: • Prevent subscribers from “sourcing” multicast traffic • Encryption of transported video traffic • Ensure that Denial of Service (DoS) guards are in place in aggregation network

  20. BNG Access device (e.g. DSLAM, PON OLT etc) Broadband Network Gateway BNG Design 1: IPTV Network DesignLayer 2 Aggregation Network With Ring Topology Aggregation network Subscribers

  21. Switch1 Switch4 Switch2 Switch3 Design 2: IPTV Network DesignLayer 3 Aggregation Network Video source RP1 R1 RP2 Aggregation network R4 Subscribers R2 R3 Note: Topology of the aggregation network may be any generic mesh Subscribers

  22. Switch1 4 2 3 Design 3: IPTV Network DesignMulticast Overlay On Top of MPLS Network Video source RP1 R1 RP2 Aggregation network R4 Subscribers R2 R3 Note: Topology of the aggregation network may be any generic mesh Subscribers

  23. Design 4: IPTV Network DesignMulticast Distribution Using VPLS Video source R2 All routers R1 .. R6 are part of a common VPLS instance R1 R3 VPLS In The Aggregation network R4 Subscribers R6 R5 Note: Topology of the aggregation network may be any generic mesh End-points of the VPLS Subscribers

  24. PIM-SSM and IGMPv3: Why Source Specific Multicast? • Challenges with Any Source Multicast (ASM): • Poor access control in “traditional” Any Source Multicast (ASM) model • Inefficient handling of well-known sources • Limited multicast address space and address allocation

  25. How to Implement IPTV Networks Closing Thoughts

  26. Explosive Subscriber Growth in IPTV • Explosive world-wide subscriber growth in this segment in the coming years • 2008 is the year the hockey stick effect takes shape! Source: Infonetics Research, “IPTV Equipment, Services and Subscribers Market Share and Forecast”, October 2006

  27. Tremendous Growth Potential World-wide! • Demand for world-wide edge routing and switching equipment for IPTV expected to grow 34% this year and 20+% over the next 2 years Source: Infonetics Research, “IPTV Equipment, Services and Subscribers Market Share and Forecast”, October 2006

  28. What to look for in an IPTV Solution • Guaranteed wire-speed performance independent of packet size • Advanced QoS architecture required for multi-play services • Low latency architecture assures better user experience • High Availability Architecture that minimizes service downtime • High Density solutions available in a variety of cost optimal configurations • Future-proof infrastructure with readiness for 100-GbE • The only IPTV aggregation platform with true 100-GbE readiness today • High infrastructure security

  29. How to Implement IPTV Networks Thank you

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