Broadband Network Architecture Options for the Delivery of IPTV
Curtis Sherbo, PEng TELECOM@NAB2007 April 17, 2007
Agenda
Background
AccessNetworkArchitectureOptions Multicast&SubscriberOptions Summary&NextSteps
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
TR-101MigrationtoEthernetBasedDSL Aggregation
ASP/Service  
Node  
A10-ASP  
Live  
Media  L2TP  
NSP1  L2TS  
A10-NSP  
IPNetwork  User1  
NSP2  IP-QoS A10-NSP  IP  BB Network Gateway  Ethernet Aggregation  Access Node (DSLAM)  MDF  Access Loop  NID  CPE  
On-Demand Media ASP1 A10-ASP IP-QoS  Operator Headend RegionalBroadband Network  Operator Access NetworkAccessNetwork V  U  TV
via
  STB
CustomerPremNet User2T  
AggregationNetwork  
Source:DSLForum2007  
TR-101 Components
NSP Network
NSP-1
IP, ATM or Ethernet
NSP-2 IP
ASP Network
Broadband Network Gateway

PPPoE and/or IP/DHCP services

Bandwidth/QoS policy enforcement

Security

Multicast control

Operation Administration Maintenance (OAM)
EAN BNG
Ethernet Aggregation Node

Ethernet/VLAN aggregation

QoS

Multicast / IGMP

Potential for separate multicast content injection point

OAM

Resiliency
AN
Access Node

ATM-Ethernet interworking

VLAN handling

Security

QoS

Multicast/IGMP

OAM
PC
RG
TV Set-Top
Residential Gateway

xDSL Access Device

Network Address
Translation (NAT)

QoS

Multicast/IGMP

OAM
Agenda
Background
AccessNetworkArchitectureOptions
Multicast&SubscriberOptions Summary&NextSteps
ConsolidatedEdge Architecture
Home/ Access BroadbandIPEdge IPCore ServicesBusiness
PC
Internet
IntegratedAggregation,EdgeRouting,BRAS
TV RG DSLAM
Data
Set-Top
BNG Networks
MPLS VPN
PC Wi-Fi/WiMAXTV RG
Set-Top
PC
IPTV
TV RG
Network
CableHE
Set-Top

in le ervice ontrol oint
S
ing
leS
erviceC
ontrolP
oint

irect onnect o el VoIP&
D
irectC
onnectM
od
el
PC
S
ig
nificantOp
erationalS
aving
s i nificant erational avin s PSTN

eal-timeserviceintelli ence,sucas
R
eal-timeserviceintellig
ence,such
as
varia le an wi tcontrol, olicy
manag
ement,statisticsg
ath
ering
p
erement,statistics erin er 3G/Wi-Fi/
TV RG variab
leb
and
wid
th
control,p
olicy
mana at
Set-Top WiMax
su scri er
sub
scrib
er
Agenda
Background
AccessNetworkArchitectureOptions
Multicast&SubscriberOptions
Summary&NextSteps
MulticastReplicationinthe Access Network
MulticastVLAN  PC  
NoSubscriberTraffic OnlyIGMPTrafficand MulticastStream  AN  RG  Set-Top  TV  
NSPNetwork  
NSP-1 NSP-2  IP,ATMor Ethernet  BNG  EAN  AN AN  RG  Set-Top  TV  
AN  RG  Set-Top  TV  
IP  RG  TV  
AN  Set-Top  
ASPNetwork  RG  TV  
BN
G:
IGMP
Per
EANorANReplication  
Mu
ltipleMulticastVLANs  
Immedia
teLea
veFunctionality  Se
t8021ppriorit
ybitsonMCtr
affic  Persubscribermulticaststatistics EANSnooping/Proxy
ANReplication
Immediate
Leave
Functionality
Enforce
QoS in8021p A :
R
G   8021pQoS,setIGMPprio
rity R strictMCTrafficfromSubsc ibers RGPr xy eceiverReplication S pportIGMPonPPPoESession, IPoEEnc psul tion,BothSimultan usly ourceIGMPw h0000  EAN  AN AN  RG RG  Set-Top Set-Top Set-Top  TV TV  
IGMP Control Traffic Option 1
PPPoE Session AN BNG
RG
“IPoE Session”
Source 0000
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
IGMP Control Traffic Option 2
PPPoE Session
AN
BNG
RG
“IPoE Session”
Source 0000
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
Service Intelligence in Option 1
BNG
RG
AN
PPPoE,
Subscriber sessions
Subscriber VLAN
Options: BNG
1) 1 VLAN per Subscriber ?
IPoE,
Multicast Service VLAN
2) Shared Subscriber VLAN ? 3) 1 or more Multicast VLANs
Multicast VLAN
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
Service Intelligence in Option 2
BNG
PPPoE, RG AN Subscriber sessions
Subscriber VLAN
BNG
Options:
IPoE,
Multicast Service VLAN
1) 1 VLAN per Subscriber ? 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 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
Agenda
Background AccessNetworkArchitectureOptions Multicast&SubscriberOptions
Summary&NextSteps
Summary
tr
rv
ice
Se
Me
tro
r i ri
Se
rv
ices
Home Access
r ti
Agg
rega
tion Edge
RT
PolicyManagement
Server
Internet
DSLAM
FTTx
SmartEdge
SinglePointtoControlallBWto
theHome(Unicast andMulticast)
Multi-ServiceEdgeRouter IPTVNetwork

SinglePointforPolicyManagement attheEdge

ServicePrioritywithnoOSS SingleService VoIP signalingorintegration
ControlPoint
DSLAMautoadjustmentofsync rate
PolicyManagementAPI&Radiusintegrationfor
applicationtonetworkpolicyenforcement
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
Redback Networks Inc

wwwredbackcom

TELECOM Supplier Exhibits N231/233
DSL Forum

wwwdslforumorg

csherbo@redbackcom
Curtis Sherbo TR-101 Migration to Ethernet Based DSL Aggregation
http://wwwdslforumorg/techwork/tr/TR-101pdf
Driving Quality IPTV Deployments

Laurie Gonzalez, Marketing Director, DSL Forum

Gavin Young, Technical Committee Chair, DSL Forum
Architecture Evolution Overview
Thank You