broadband network architecture options for the delivery of iptv
TRANSCRIPT
Broadband Network Architecture Options for the Delivery of IPTV
Curtis Sherbo, P.EngTELECOM@NAB2007April 17, 2007
2
Agenda
2
Background
Access Network Architecture Options
Multicast & Subscriber Options
Summary & Next Steps
3
Background
Redback Networks and its flagship product, the SmartEdgeMulti-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
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TR-101 Migration to Ethernet Based DSL Aggregation
IP Network
Operator Headend
TV via TV via STBSTB
Operator Access Network
Live Media
On-Demand Media
Regional BroadbandNetwork
Access Network
AccessNode
(DSLAM)
Access
LoopMDF
EthernetAggregationIP
BBNetworkGateway
L2TS
IP - QoS
L2TP
Customer Prem. Net
CPE
NSP1
ASP1
A10-ASP
A10-NSP
U
User1
User2T
NIDNSP2
A10-NSP
IP - QoS
A10-ASP
V
ASP/Service Node
Aggregation NetworkSource: DSL Forum 2007
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TR-101 Components
ANEAN
Set-Top
TV
PC
RG
BNG
NSP Network
NSP-1
NSP-2
IP, ATM orEthernet
ASP Network
IP
Broadband Network Gateway•PPPoE and/or IP/DHCP services
•Bandwidth/QoS policy
enforcement
•Security
•Multicast control•Operation Administration
Maintenance (OAM)
Ethernet Aggregation Node•Ethernet/VLAN aggregation•QoS
•Multicast / IGMP
•Potential for separate
multicast content injection
point•OAM
•Resiliency
Access Node•ATM-Ethernet interworking
•VLAN handling
•Security
•QoS
•Multicast/IGMP•OAM
Residential Gateway•xDSL Access Device•Network Address
Translation (NAT)
•QoS
•Multicast/IGMP
•OAM
6
Agenda
6
Background
Access Network Architecture Options
Multicast & Subscriber Options
Summary & Next Steps
7
Multi-Edge Architecture
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG DSLAM
FTTx
Wi-Fi/WiMAX
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG IPTVNetwork
VoIP &PSTN
3G/Wi-Fi/WiMAX
Internet
MPLSVPN
DataNetworks
EAN
Home/Business
Access ServicesIP Core Metro Edge Services Edge
• Requires a BNG per service• Operationally complex• No real-time service intelligence, i.e. variable bandwidth control• Relies heavily on functionality at the AN
BNG(BRAS)
BNG(Video)
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Single Edge Architecture
Integrated, Edge Routing, BRAS
Broadband IP EdgeHome/
BusinessAccess ServicesIP Core
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG DSLAM
FTTx
Wi-Fi/WiMAX
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG IPTVNetwork
VoIP &PSTN
3G/Wi-Fi/WiMax
Internet
MPLSVPN
DataNetworks
• One BNG for all services• Real-time service intelligence, such as variable bandwidth control, policy management, statistics gathering per subscriber• Simpler to manage
• One BNG for all services• Real-time service intelligence, such as variable bandwidth control, policy management, statistics gathering per subscriber• Simpler to manage
EAN
BNG
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Consolidated Edge Architecture
Integrated Aggregation, Edge Routing, BRAS
Broadband IP EdgeHome/
BusinessAccess ServicesIP Core
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG DSLAM
Cable HE
Wi-Fi/WiMAX
Set-Top
TV
PC
RG
Set-Top
TV
PC
RG IPTVNetwork
VoIP &PSTN
3G/Wi-Fi/WiMax
Internet
MPLSVPN
DataNetworks
• Single Service Control Point• Direct Connect Model• Significant Operational Savings• Real-time service intelligence, such as variable bandwidth control, policy management, statistics gathering per subscriber
• Single Service Control Point• Direct Connect Model• Significant Operational Savings• Real-time service intelligence, such as variable bandwidth control, policy management, statistics gathering per subscriber
BNG
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Agenda
10
Background
Access Network Architecture Options
Multicast & Subscriber Options
Summary & Next Steps
11
EAN
Multicast Replication in the Access Network
ANEAN
Set-Top
TV
PC
RG
BNG
NSP Network
NSP-1
NSP-2
IP, ATM orEthernet
ASP Network
IP
Set-Top
TVRG
Set-Top
TVRG
Set-Top
TVRG
Set-Top
TVRG
Set-Top
TVRG
Set-Top
TVRG
BNG:• IGMP• Per EAN or AN Replication• Multiple Multicast VLANs• Immediate Leave Functionality• Set 802.1p priority bits on MC traffic• Per subscriber multicast statistics
EAN:• IGMP Snooping/Proxy• Per AN Replication• Immediate Leave Functionality• Enforce QoS in 802.1p
AN:• IGMP Snooping/Proxy• Per RG Replication• Immediate Leave Functionality• Enforce 802.1p QoS, set IGMP priority• Restrict MC Traffic from Subscribers
RG:• IGMP Proxy• Per Receiver Replication• Support IGMP on PPPoE Session, IPoE Encapsulation, Both Simultaniously• Source IGMP with 0.0.0.0
Multicast VLANNo Subscriber Traffic
Only IGMP Traffic and
Multicast Stream
AN
AN
AN
AN
AN
AN
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IGMP Control Traffic Option 1
AN BNGRG
PPPoE Session
“IPoE Session”
IGMP Join & Leave
Multicast Data
Source 200.1.1.124
Source 0.0.0.0
� 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
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IGMP Control Traffic Option 2
AN BNGRG
PPPoE Session
“IPoE Session”
IGMP Join & Leave
Multicast Data
Source 200.1.1.124
Source 0.0.0.0
� 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
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Service Intelligence in Option 1
AN
BNGRG
� 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.
Multicast VLAN
IGMP Termination
IPoE, Multicast Service VLAN
PPPoE, Subscriber sessions
BNGSubscriber VLAN
Options:
1) 1 VLAN per Subscriber ?
2) Shared Subscriber VLAN ?
3) 1 or more Multicast VLANs
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Service Intelligence in Option 2
AN
BNGRG
� 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.
Options:
1) 1 VLAN per Subscriber ?
2) Shared Subscriber VLAN ?
3) 1 or more Multicast VLANsMulticast VLAN
IGMP Termination
IPoE, Multicast Service VLAN
PPPoE, Subscriber sessions
BNGSubscriber VLAN
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Agenda
16
Background
Access Network Architecture Options
Multicast & Subscriber Options
Summary & Next Steps
17
Summary
DSLAMDSLAM
Internet
IPTV Network
RTRT
FTTxFTTx
VoIP
Policy ManagementServer
Single Service
Control Point
• Single Point to Control all BW to the Home (Unicast and Multicast)•Single Point for Policy Management at the Edge• Service Priority with no OSS signaling or integration• DSLAM auto adjustment of sync rate
Policy Management API & Radius integration for application to network policy enforcement
HomeHome AccessAccess Metro Aggregation
Metro Aggregation
Service Edge
Service Edge
ServicesServices
SmartEdgeMulti-Service Edge Router
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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
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More Information
Redback Networks Inc.
– www.redback.com
– TELECOM Supplier Exhibits N231/233
DSL Forum
– www.dslforum.org
Curtis Sherbo
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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
Thank You.