1. Multimedia over DSL By Phil Moy

2. May 14, 2015 2 Agenda n DSL Forum Working Text 80 - Multiservice Architecture & Framework Requirements n DSL Forum Working Text 81 - Architecture Requirements for the Support of QOS Enabled IP Services n BRAS (Broadband Remote Access Server) – Packet Processing – Differentiated Services n Current Industry Trends

3. May 14, 2015 3 Central Office Wiring Center BRAS Architecture Overview ATM ATM DSLAMs RT DSLAMs MTU DSLAMs Communications Portal Storage Applications (eg, VPN) ISPs / Internet L3 Switch /IPSS Voice Gateway ATM or Ethernet PSTN Class 5 BRAS Video Server

4. May 14, 2015 4 WT-080 Multiservice Architecture & Framework Requirements n IP QOS – Guaranteed QOS n ATM CAC (Call Admission Control) CBR VBR n RSVP reservation n Bandwidth On Demand, “Turbo Button” – DSL Trained to maximum, allows dynamic control of rate n Many To Many Access n Content Distribution – Caching – IP Multicasting

5. May 14, 2015 5 WT-080 Multiservice Architecture & Framework Requirements (cont) n Bandwidth – ADSL - 8 Mbps up to 10,000 feet – ADSL2 - will provide 8 Mbps with a longer range – ADSL2+ - doubles the bandwidth over ADSL but with half the range – VDSL - 12.96Mbps at 1000 ft, 51.84 Mbps at 4500 ft

6. May 14, 2015 6 WT-081 DSL Evolution - Architecture Requirements for the Support of QOS Enabled IP Services n Many to Many supported by TVR (Transparent Virtual Routing) n QOS - Diffserv – DSCP Marking of IP Header TOS Byte (6 bits) n AF - Assured Forwarding n EF - Expedited Forwarding n BE - Best Effort n Hierarchical Scheduling – Schedule Traffic Downstream taking into account all physical links to subscriber n Fragmentation – Fragment Low Priority Packets to minimize delay/jitter

7. May 14, 2015 7 BRAS: Packet Processing Cells... Cell, PPP frame, PPPoE frame, L2TP frame, Ethernet frame, IP datagram Header Per VC decision: Ingress Egress SAR Mask Relevant Bits Integrated Forwarding/ Scheduling Process n Diff Serv Classification n Best Effort n Expedited Forwarding n Metering n Priority Scheduling SAR AAL2 PPPoE IP Gaming IP Video

8. May 14, 2015 8 BRAS: Differentiated Services DS3 DSL OC-3 ATM WAN BRAS Switch CPE Router with NAT, or Ethernet Modem, or IAD Best effort to Serv Provider 1 Guaranteed to Serv Provider 1 Best effort to Serv Provider 2 Voice over IP Aggregation Group 3 Aggregation Group 2 New gaming service One VC serves multiple subscribers ATM QoS thru backbone Policies determine which subscribers can access service IP DiffServ CoS mapped to ATM QoS Aggregation Group 1 (IP) Video Server

9. May 14, 2015 9 Demo System

10. May 14, 2015 10 Current Industry Trends n BRAS space is new with products developed from Alcatel, Cisco, Copper Mountain, Juniper, and Redback n RFPs for BRAS currently out from ILECs with scheduled roll out as early as 4th quarter 2003 but probably next year

11. May 14, 2015 11 Acknowledgments n Copper Mountain Networks n DSL Forum

12. May 14, 2015 12 Conclusion n BRAS Architecture enables Multimedia over DSL – BRAS allows multimedia over “Dumb” DSLAMs. – Congestion usually only found in the last mile can now be avoided – Turbo Button allows video on demand by dynamically boosting bandwidth up when a user purchases a movie – Diffserv allows high priority multimedia traffic to coexist with low priority web traffic. n Questions?