Broadband Network Architecture
Options for the Delivery of IPTV
Curtis Sherbo, P.Eng
TELECOM@NAB2007
April 17, 2007
Agenda
    Background
    Access Network Architecture Options
    Multicast & Subscriber Options
    Summary & Next Steps
...
Background

     Redback Networks and its
     flagship product, the SmartEdge
     Multi-Service Edge Router
     support...
TR-101 Migration to Ethernet Based DSL
          Aggregation


ASP/Service
   Node
                    A10-ASP

          ...
TR-101 Components
        NSP Network

            NSP-1
                      IP, ATM or
                       Ethernet
...
Agenda
    Background
    Access Network Architecture Options
    Multicast & Subscriber Options
    Summary & Next Steps
...
Multi-Edge Architecture
      Home/
                     Access       Metro Edge        Services Edge           IP Core   ...
Single Edge Architecture
      Home/
                     Access             Broadband IP Edge               IP Core   Ser...
Consolidated Edge Architecture
      Home/
                     Access                  Broadband IP Edge                 ...
Agenda
     Background
     Access Network Architecture Options
     Multicast & Subscriber Options
     Summary & Next St...
Multicast Replication in the Access Network
                                   Multicast VLAN                        PC

 ...
IGMP Control Traffic Option 1
                              .1   24
                          1.1
                      00...
IGMP Control Traffic Option 2
                                   24             PPPoE Session
                            ...
Service Intelligence in Option 1
                                                                                         ...
Service Intelligence in Option 2
                                                                                         ...
Agenda
     Background
     Access Network Architecture Options
     Multicast & Subscriber Options
     Summary & Next St...
Summary
                                         Metro
                                          Metro            Service
...
Architecture Evolution

      WT-146 IP Sessions
        – Specification of a Subscriber Session based on DHCP
          i...
More Information

      Redback Networks Inc.
       – www.redback.com
       – TELECOM Supplier Exhibits N231/233


     ...
References

      TR-101 Migration to Ethernet Based DSL
      Aggregation
       – http://www.dslforum.org/techwork/tr/TR...
Thank You.
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Broadband Network Architecture Options for the Delivery of IPTV

  1. 1. Broadband Network Architecture Options for the Delivery of IPTV Curtis Sherbo, P.Eng TELECOM@NAB2007 April 17, 2007
  2. 2. Agenda Background Access Network Architecture Options Multicast & Subscriber Options Summary & Next Steps 2
  3. 3. Background Redback Networks and its flagship product, the SmartEdge Multi-Service Edge Router support more than 50 million of today's Broadband subscribers DSL Forum is a consortium of approximately 200 leading industry players covering telecommunications, equipment, computing, networking and service provider companies. Source: DSL Forum 2007 3
  4. 4. TR-101 Migration to Ethernet Based DSL Aggregation ASP/Service Node A10-ASP Live Media L2TP NSP1 L2TS A10-NSP User1 BB Access IP Network IP - QoS Network Ethernet Node MDF Access NID CPE NSP2 IP Aggregation Loop A10-NSP Gateway (DSLAM) User2 T Operator TV via On-Demand - QoS IP V Access ASP 1 Media STB Customer Prem. Net A10-ASP Operator NetworkNetwork Access Regional Broadband U Network Headend Aggregation Network Source: DSL Forum 2007 4
  5. 5. TR-101 Components NSP Network NSP-1 IP, ATM or Ethernet NSP-2 EAN BNG AN PC RG TV Set-Top IP ASP Network Broadband Network Gateway Ethernet Aggregation Node Access Node Residential Gateway •PPPoE and/or IP/DHCP •Ethernet/VLAN aggregation •ATM-Ethernet •xDSL Access Device services •QoS interworking •Network Address •Bandwidth/QoS policy •Multicast / IGMP •VLAN handling Translation (NAT) enforcement •Potential for separate •Security •QoS •Security multicast content injection •QoS •Multicast/IGMP •Multicast control point •Multicast/IGMP •OAM •Operation Administration •OAM •OAM Maintenance (OAM) •Resiliency 5
  6. 6. Agenda Background Access Network Architecture Options Multicast & Subscriber Options Summary & Next Steps 6
  7. 7. Multi-Edge Architecture Home/ Access Metro Edge Services Edge IP Core Services Business PC Internet TV RG DSLAM Data Set-Top Networks PC MPLS BNG(BRAS) VPN RG Wi-Fi/WiMAX TV Set-Top PC EAN TV RG IPTV FTTx Network Set-Top BNG(Video) VoIP & PC PSTN TV RG • Requires a BNG per service • Operationally complex 3G/Wi-Fi/ Set-Top • No real-time service intelligence, i.e. variable WiMAX bandwidth control • Relies heavily on functionality at the AN 7
  8. 8. Single Edge Architecture Home/ Access Broadband IP Edge IP Core Services Business PC Internet Integrated, Edge Routing, BRAS TV RG DSLAM Data Set-Top BNG Networks PC EAN MPLS VPN RG Wi-Fi/WiMAX TV Set-Top PC TV RG IPTV FTTx Network Set-Top •• One BNG for all services One BNG for all services VoIP & PC • Real-time service intelligence, • Real-time service intelligence, PSTN such as variable bandwidth such as variable bandwidth TV RG control, policy management, control, policy management, statistics gathering per subscriber statistics gathering per subscriber 3G/Wi-Fi/ Set-Top • Simpler to manage WiMax • Simpler to manage 8
  9. 9. Consolidated Edge Architecture Home/ Access Broadband IP Edge IP Core Services Business PC Internet Integrated Aggregation, Edge Routing, BRAS TV RG DSLAM Data Set-Top BNG Networks PC MPLS VPN RG Wi-Fi/WiMAX TV Set-Top PC TV RG IPTV Cable HE Network Set-Top •• Single Service Control Point Single Service Control Point •• Direct Connect Model Direct Connect Model VoIP & PC •• Significant Operational Savings PSTN Significant Operational Savings •• Real-time service intelligence, such as Real-time service intelligence, such as TV RG variable bandwidth control, policy variable bandwidth control, policy management, statistics gathering per management, statistics gathering per 3G/Wi-Fi/ Set-Top subscriber subscriber WiMax 9
  10. 10. Agenda Background Access Network Architecture Options Multicast & Subscriber Options Summary & Next Steps 10
  11. 11. Multicast Replication in the Access Network Multicast VLAN PC No Subscriber Traffic RG Only IGMP Traffic and TV Set-Top Multicast Stream AN NSP Network RG NSP-1 TV AN Set-Top IP, ATM or Ethernet NSP-2 EAN BNG AN RG AN TV Set-Top IP RG TV AN Set-Top ASP Network RG TV Set-Top EAN RG: AN: EAN: BNG: AN RG TV • IGMP Snooping/Proxy Proxy Set-Top • Per EAN or AN Replication Receiver Replication RG Replication AN Replication • Multiple Multicast Functionality Support IGMP on PPPoE Immediate Leave VLANs Session, IPoE Encapsulation, Both Simultaniously • Immediate Leave Functionality priority Enforce 802.1p QoS, set IGMP QoS in 802.1p AN RG TV • Set 802.1p priority 0.0.0.0 MC traffic Source MC Traffic from Subscribers Restrict IGMP with bits on Set-Top • Per subscriber multicast statistics 11
  12. 12. IGMP Control Traffic Option 1 .1 24 1.1 00. PPPoE Session e2 urc So AN BNG RG “IPoE Session” Source 0.0.0.0 IGMP Join & Leave Multicast Data PPPoE Session for Subscriber Internet Traffic IPoE Encapsulation for Multicast Traffic No DHCP used since Subscriber has IP-address from PPPoE IPCP IGMP Traffic on Both PPPoE and IPoE Encapsulation BNG receives individual subscriber IGMP Joins/Leaves 12
  13. 13. IGMP Control Traffic Option 2 24 PPPoE Session .1.1 00. 1 e2 urc AN So BNG RG “IPoE Session” Source 0.0.0.0 IGMP Join & Leave Multicast Data PPPoE Session for Subscriber Internet Traffic IPoE Encapsulation for Multicast Traffic No DHCP used since Subscriber has IP-address from PPPoE IPCP IGMP Traffic ONLY on the IPoE Encapsulation BNG may or may not see individual subscriber IGMP Joins/Leaves, depending on the IGMP implementation on the Access Node 13
  14. 14. Service Intelligence in Option 1 BNG RG AN PPPoE, Subscriber sessions Subscriber VLAN BNG Options: IPoE, 1) 1 VLAN per Subscriber ? Multicast Service VLAN 2) Shared Subscriber VLAN ? Multicast VLAN 3) 1 or more Multicast VLANs IGMP Termination BNG will receive IPTV IGMP on MC-VLAN, to be used for Forwarding Decision BNG will always receive Subscriber IGMP traffic on PPPoE session BNG can perform Subscriber Rate Control Based on IGMP join/leaves BNG can perform Subscriber Multicast statistic BNG can perform Subscriber Multicast troubleshooting BNG can differentiate Subscriber IGMP traffic, and use IPTV range for Informational purpose, but use ”public” range for Subscriber specific forwarding decision over the PPPoE session. 14
  15. 15. Service Intelligence in Option 2 BNG PPPoE, RG Subscriber sessions AN Subscriber VLAN BNG IPoE, Options: Multicast Service VLAN 1) 1 VLAN per Subscriber ? Multicast VLAN 2) Shared Subscriber VLAN ? IGMP Termination 3) 1 or more Multicast VLANs BNG will receive IPTV IGMP on MC-VLAN, to be used for Forwarding Decision BNG can match IGMP packet MAC-address with Subscriber PPPoE MAC-address If AN is in Transparent Snooping Mode BNG will receive all Subscriber IGMP Traffic BNG can perform Subscriber Rate Control Based on IGMP join/leaves BNG can perform Subscriber Multicast statistic and troubleshooting If AN is in Snoop & Aggregate or Proxy Mode BNG will NOT receive all Subscriber IGMP Traffic BNG can Not perform any Subscriber Multicast functionality. 15
  16. 16. Agenda Background Access Network Architecture Options Multicast & Subscriber Options Summary & Next Steps 16
  17. 17. Summary Metro Metro Service Service Services Home Home Access Access Services Aggregation Aggregation Edge Edge RT Policy Management Server Internet DSLAM FTTx • Single Point to Control all BW to SmartEdge the Home (Unicast and Multicast) Multi-Service Edge Router •Single Point for Policy Management IPTV Network at the Edge • Service Priority with no OSS Single Service VoIP signaling or integration • DSLAM auto adjustment of sync Control Point rate Policy Management API & Radius integration for application to network policy enforcement 17
  18. 18. Architecture Evolution WT-146 IP Sessions – Specification of a Subscriber Session based on DHCP instead of PPP WT-147 Layer 2 Control Mechanism (ANCP) – Mechanism for exchange of information and/or control between Access Nodes and Broadband Network Gateways – L2C usage and functionality being specified in DSLF – ANCP Protocol being defined in IETF WT-144 Multi-Service Architecture Framework & Requirements (TR-58bis) – Business Requirements for WT-145 WT-145 TR-59/TR-101bis – Evolution of TR-101 to meet new business requirements 18
  19. 19. More Information Redback Networks Inc. – www.redback.com – TELECOM Supplier Exhibits N231/233 DSL Forum – www.dslforum.org Curtis Sherbo – csherbo@redback.com 19
  20. 20. References TR-101 Migration to Ethernet Based DSL Aggregation – http://www.dslforum.org/techwork/tr/TR-101.pdf Driving Quality IPTV Deployments – Laurie Gonzalez, Marketing Director, DSL Forum Architecture Evolution Overview – Gavin Young, Technical Committee Chair, DSL Forum 20
  21. 21. Thank You.
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