multimedia over dsl
Download
Skip this Video
Download Presentation
Multimedia over DSL

Loading in 2 Seconds...

play fullscreen
1 / 12

Multimedia over DSL - PowerPoint PPT Presentation


  • 135 Views
  • Uploaded on

Multimedia over DSL . By Phil Moy. Agenda. DSL Forum Working Text 80 - Multiservice Architecture & Framework Requirements DSL Forum Working Text 81 - Architecture Requirements for the Support of QOS Enabled IP Services BRAS (Broadband Remote Access Server) Packet Processing

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Multimedia over DSL' - arlo


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
agenda
Agenda
  • DSL Forum Working Text 80 - Multiservice Architecture & Framework Requirements
  • DSL Forum Working Text 81 - Architecture Requirements for the Support of QOS Enabled IP Services
  • BRAS (Broadband Remote Access Server)
    • Packet Processing
    • Differentiated Services
  • Current Industry Trends
bras architecture overview
BRAS Architecture Overview

ATM

Central Office Wiring Center

PSTN

ISPs / Internet

Class 5

Voice Gateway

ATM or Ethernet

L3 Switch /IPSS

Applications(eg, VPN)

BRAS

Video Server

Storage

ATM DSLAMs

Communications Portal

RT DSLAMs

MTU DSLAMs

wt 080 multiservice architecture framework requirements
WT-080 Multiservice Architecture & Framework Requirements
  • IP QOS
    • Guaranteed QOS
      • ATM CAC (Call Admission Control)
        • CBR
        • VBR
      • RSVP reservation
  • Bandwidth On Demand, “Turbo Button”
    • DSL Trained to maximum, allows dynamic control of rate
  • Many To Many Access
  • Content Distribution
    • Caching
    • IP Multicasting
wt 080 multiservice architecture framework requirements cont
WT-080 Multiservice Architecture & Framework Requirements (cont)
  • 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
wt 081 dsl evolution architecture requirements for the support of qos enabled ip services
WT-081 DSL Evolution - Architecture Requirements for the Support of QOS Enabled IP Services
  • Many to Many supported by TVR (Transparent Virtual Routing)
  • QOS - Diffserv
    • DSCP Marking of IP Header TOS Byte (6 bits)
      • AF - Assured Forwarding
      • EF - Expedited Forwarding
      • BE - Best Effort
  • Hierarchical Scheduling
    • Schedule Traffic Downstream taking into account all physical links to subscriber
  • Fragmentation
    • Fragment Low Priority Packets to minimize delay/jitter
bras packet processing
BRAS: Packet Processing

Per VC decision:

SAR

SAR

Cell, PPP frame, PPPoE frame, L2TP frame, Ethernet frame, IP datagram

Header

AAL2

Mask

PPPoE

IP Gaming

IP Video

Relevant Bits

  • Diff Serv Classification
    • Best Effort
    • Expedited Forwarding
  • Metering
  • Priority Scheduling

Integrated Forwarding/ Scheduling Process

. . .

Ingress

Cells

Egress

bras differentiated services
BRAS: Differentiated Services

Video Server

DS3

BRAS

Switch

Aggregation Group 1(IP)

ATM WAN

DSL

CPE Router with NAT, or Ethernet Modem,

or IAD

DSL

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

OC-3

Aggregation Group 3

Best effort to Serv Provider 1

Guaranteed to Serv Provider 1

Best effort to Serv Provider 2

Voice over IP

current industry trends
Current Industry Trends
  • BRAS space is new with products developed from Alcatel, Cisco, Copper Mountain, Juniper, and Redback
  • RFPs for BRAS currently out from ILECs with scheduled roll out as early as 4th quarter 2003 but probably next year
acknowledgments
Acknowledgments
  • Copper Mountain Networks
  • DSL Forum
conclusion
Conclusion
  • 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.
  • Questions?
ad