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Transcript of All rights reserved © 2005, Alcatel 1 Quality of Service in IP Networks Scott Nelson.
1
All rights reserved © 2005, Alcatel
Quality of Service in IP Networks
Scott Nelson
Page 2
All rights reserved © 2005, Alcatel
Triple Play NGN Architecture
User Service Centers
ULL Site
I P-DSLAM
GEth
POP
WANIP/MPLS
CWDM+
Ethernet
GEth Video Platf orm
MANGEth Aggregation
ADSL2+
TV Client (STB)
PC
SI P- IP
SI P- IP
Service Routing VoI P
Platf ormResidential Gateway
End- to- End ApplicationManagement
User Service Centers
ULL Site
I P-DSLAM
GEth
POP
WANIP/MPLS
CWDM+
Ethernet
GEth Video Platf orm
MANGEth Aggregation
ADSL2+
TV Client (STB)
PC
SI P- IP
SI P- IP
Service Routing VoI P
Platf ormResidential Gateway
End- to- End ApplicationManagement
Page 3
All rights reserved © 2005, Alcatel
Triple Play Service Delivery Architecture
Distributed BNG (as shown) Subscriber management in BSA (7450) L2 forwarding with L3 QoS/security Full routing in the BSR (7750) Network architecture for lowest capex Collapses residential, business L2, and
business L3 service aggregation on common elements
No extra hops or boxes and supports local VOD PIM multicast trees reduced
BNG Routed termination Subscriber management and routing in BSR Access nodes terminate into BSRs directly,
or via Ethernet Aggr/Packet-Ring (1850TSS) backhaul
Layer 3 Business services supported everywhere
BSR (7750) also supports L2-VPNs for business
HomeGateway
BTVBTV
...
BroadbandAccess Node
BroadbandServiceRouter
Broadband Network Gateway (BNG) as per DSL Forum WT-101
BroadbandService
Aggregation
IASPPartners
IP Backbone
SubscriberPublicInternet
ADSL2+VDSL2GPON
Page 4
All rights reserved © 2005, Alcatel
Triple Play Service Delivery Architecture
Address Scale and Reduce Cost Scalable subscriber management and QoS
Improve Resiliency Non-Stop Services, subscriber-state
resiliency, etc.
Fully address subscriber, network, and application security
Secured Ethernet, lawful interception, etc
Provide an operational model for mass deployment
Auto-configuration, simple OSS integration
Improve Subscriber policy control H-QoS, L4-L7 policy control, etc
Optimize for Applications Multicast handling, service admission
control, etc
Ability to consolidate business services on a common infrastructure
L2-VPNs, L3-VPNs, Broadband services, Virtual Ethernet services, peering, etc
BroadbandServiceRouter
BroadbandService
Aggregation
HomeGateway
BTVBTV
...
BroadbandAccess Node
IASPPartners
IP Backbone
SubscriberPublicInternet
ADSL2+VDSL2GPON
Page 5
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IP Based Triple Play
Triple Play of VoIP, IP Video and Internet Network Bandwidth dominated by IP Video Access, Metro and Core
Internet Bandwidth
ICC Bandwidth
PiP Bandwidth
VoD Bandwidth
MulticastBandwidth
Business Case Assumptions
0
10,000
20,000
30,000
40,000
50,000
60,000
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
Mb
ps
VoIP Bandw idth
Internet Bandw idth
ICC Bandw idth
PiP Bandw idth
VoD Bandw idth
Multicast Bandw idthkb
ps
IP Video
Internet
VoIP
0
30,000
60,000
90,000
120,000
150,000
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
Mb
ps
0
Based on modelling for NA Operator
Internet traffic - Internet Core
IP Traffic in the IP “Core” (behind BSR - 7750) Assumes centralised VoD and D-server
Page 6
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IP Video and Network Transformation
Aggregation Service RouterAccessHome
1.5 .1 .1 .05VoIP BW
HSI BW
1.5M .1M .1M .05M Total BW
{
30x Scale Increase30x100x~15x
Today’sBandwidth Needs per user
Core
10G~300 users
100G~8k users
200G~50k users
3M.3M
.2M
2M
Total BW1.5M10M20M
VoIP BW.2M.2M.2MHSI BW
IP Video BW
.3M
9M
.3M3M*
1M16MTriple PlayBandwidth Needsper user
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IP Quality of Service
What do we mean by IP Quality of Service? Quality - Meeting the customers expectation Manage services at the IP layer
Individual IP flows Multiservice IP networks
Network Design plays a key role Network Dimensioning
Coping with bursty nature of IP flows IP classifcation and differentiation of different service types
– Video, VoIP, High Speed Internet Service and Network Availability
Network resiliency High Service Availability in the Network Equipment
PerSub
VLAN
VoIPVoIPVideoVideoHSIHSI
GE
Per SubVLAN
VoIPVideoHSI
PerSub
VLAN
VoIPVoIPVideoVideoHSIHSI
GE
Per SubVLAN
VoIPVideoHSI
This QoS Enabled IP Network is not the Internet
HSI - High Speed Internet
Page 8
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Video BurstVideo BurstIP
VoIPVoIP
VODVOD
Best Effort DataBest Effort Data
Preferred DataPreferred Data
10GE7450 ESS
or 7750 SR
PerSub
VLAN
VoIPVoIP
VideoVideo
HSIHSI 7750SR
GE
VoIPVoIP
HSIHSI
MultiSub
VLAN
VoIPVoIP
HSIHSI
VoIPVoIPVideoHSIHSI
Video
Video
Per SubVLAN
VoIPVideoHSI
End-to-End QoS Model
Per-sub-per-service (basic) QoS at DSLAM
Prioritization:802.1pQueueing:4 queues per sub & ingress policingCoS queuing to net.Multicast injectionMarking:802.1p marking
Per-sub-per-service (advanced) QoS at Subscriber Mngmt Edge
Prioritization:L2-L4, DSCPQueueing/Shaping:Hierarchical QoSPer-sub, per-service queuing, scheduling & shapingMarking:802.1p downstreamDSCP upstream
Class-based QoS at Core with fair BW partitioning /reuse
Prioritization:L2-L4, DSCPQueueing/Shaping:Application/content queues with shapingMarking/re-marking:DSCP downstreamDSCP upstream
Class-based QoS at Eth-Aggr/Packet-Ring with fair BW partitioning/re-use
Prioritization:802.1pQueueing/Shaping:MEF policing (EVC+CoS)CoS scheduling & shaping Fair ring-wide load balancing
Page 9
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Leveraging the QoS Evolution for Improved High Speed Internet Services
Alcatel 7750 SRService Router
Cisco 7K SeriesMulti-protocol Routers
Juniper M seriesInternet Routers
Multi-protocol Routingfor Enterprise Networks
Internet Routing for ISPsand Telcos
Service Routingfor Carrier Networks
Market Opportunity
Product
• ASIC-based IP forwarding• OC-48 OC-192 line
rates (2.5 10Gb/s)• Stable, scalable & inter-
operable routing protocols
Market Trend
• Office desktop networking• TCP/IP, AppleTalk, Novell• Low-speed leased-line /
FR WAN connectivity
• Business & consumerconnectivity to Internet
• IP becomes dominant• Build-out of large ISPs
• Ethernet and IP-based services for Enterprises
• IP TV, Triple Play for consumers
KeyTechnologies
• Cisco masters SW/protocol complexitywith IOS
• General purpose CPUfor control and forwarding
• 10 Gb/s Network Processor/Traffic Manager
• Evolution of IP/MPLS protocols & services
1993-1997 1998-2002 2004-2008
Cisco GSR, Juniper M/TInternet Routers
Cisco 7500Multi-protocol Router
Alcatel 7750 SRService Router
Cisco 7K SeriesMulti-protocol Routers
Juniper M seriesInternet Routers
Multi-protocol Routingfor Enterprise Networks
Internet Routing for ISPsand Telcos
Service Routingfor Carrier Networks
Market Opportunity
Product
• ASIC-based IP forwarding• OC-48 OC-192 line
rates (2.5 10Gb/s)• Stable, scalable & inter-
operable routing protocols
Market Trend
• Office desktop networking• TCP/IP, AppleTalk, Novell• Low-speed leased-line /
FR WAN connectivity
• Business & consumerconnectivity to Internet
• IP becomes dominant• Build-out of large ISPs
• Ethernet and IP-based services for Enterprises
• IP TV, Triple Play for consumers
KeyTechnologies
• Cisco masters SW/protocol complexitywith IOS
• General purpose CPUfor control and forwarding
• 10 Gb/s Network Processor/Traffic Manager
• Evolution of IP/MPLS protocols & services
1993-1997 1998-2002 2004-2008
Cisco GSR, Juniper M/TInternet Routers
Cisco 7500Multi-protocol Router
Triple Play is Driving a QoS-based InfrastructureWe can leverage this Infrastructure for HSI Service Value
Classification utilizes the QoS Infrastructure
Increasing classification intelligence through application awareness
Utilizing an integrated network level QoS Solution
Page 10
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Beyond Triple Play – Adding Value to Internet
For the Service Provider Tiered HSI Revenue Opportunities to increase ARPU
Gaming, Peer-to-peer, URL filtering, iVoIP, iVideo Fairness: Align usage of HSI network resources with
revenue on a per subscriber basis Enable an IASP “eco-system” to enable
competing IASPs to differentiate themselves
For the C/ASP Differentiate your offering by improving
your customers’ HSI experience
For the Subscriber Gain a better HSI experience Pay only for the value that you need
GEGEPerPerSubSub
PerPerSubSub
PerPerSubSub
Gen 1:SubPipe
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
Gen 2:Multi-Service
GamingGamingP2PP2P
iVoIPiVoIPiVideoiVideo
Gen 3:Multi-App
GEGEPerPerSubSub
PerPerSubSub
PerPerSubSub
Gen 1:SubPipe
GEGEPerPerSubSub
PerPerSubSub
PerPerSubSub
GEGEPerPerSubSub
PerPerSubSub
PerPerSubSub
Gen 1:SubPipe
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
Gen 2:Multi-Service
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
VoIPVoIPVideoVideoHSIHSI
Gen 2:Multi-Service
GamingGamingP2PP2P
iVoIPiVoIPiVideoiVideo
Gen 3:Multi-App
GamingGamingP2PP2P
iVoIPiVoIPiVideoiVideo
GamingGamingP2PP2P
iVoIPiVoIPiVideoiVideo
Gen 3:Multi-App
Page 11
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Neutrality, Fairness and Service Improvement
Net Neutrality (FCC August 2005 Principles) Access the internet content of choice Run applications and use services of choice Connect their choice of devices that do no
harm Enjoy competition among service, application
and content providers
Fairness Ensure best-effort network resources are
allocated in a just and equitable fashion
Service Improvement Enables subscribers and content/application
providers to improve their experiences over the public internet
Service Expansion Delivers a Better Internet ExperienceEnsures Fairness and Maintains the Principles of Neutrality
Page 12
All rights reserved © 2005, Alcatel
Triple Play Networks
QoS Enabled IP Networks Basis for Triple Play Networks Underlying IP Infrastructure for IMS Architecture determined by IP Video needs
Common architectures Different Implementations
Remaining challenges Wholesaling models
Beyond ULL Bit stream access
Net Neutrality Requires creative and close co-operation between service
providers, equipment vendors and regulators
HomeGateway
BTVBTV
...
BroadbandAccess Node
IASPPartners
IP Backbone
SubscriberPublicInternet
ADSL2+VDSL2GPON
HomeGateway
BTVBTV
...
BroadbandAccess Node
IASPPartners
IP Backbone
SubscriberPublicInternet
ADSL2+VDSL2GPON
Page 13
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www.alcatel.com
Page 14
All rights reserved © 2005, Alcatel
High Availability for Residential & Business Services
VPLS7450
Sub-50msFast Reroute
7750
Non-stop routingNon-stop service means node stays up
7450
7450
Dual-homed customer
Single-homed DSLAM with LAG
Spoke SDP to 7750 means Fast reroute to a routed interface instead of slower VRRP failover
Non-stop routingNon-stop service means node stays up
Policy VRRP provides service-aware choice of master gateway router. IPoE and VRRP provide hot standby reslience.
7750
Hot-Standby IP edge router redundancy with IPoE/DHCP Rapid restoration with VPLS and sub-50ms fast-reroute, no spanning tree
DHCP state persistence in 7450 and 7750 for all lease-related state Link redundancy options with 802.3ad link aggregation and active/standby options High-availability with non-stop routing/non-stop service
Page 15
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Routed BNG Connectivity Models- Per-Sub VLAN & Multi-Sub VLAN
Subnet spans many subscribers and multiple OLTs Retains same OLT connectivity model Enables persistent context for each subscriber
Subnet can span multiple DSLAMs Subscriber identified by option 82
Subscriber policy and queues dynamically assigned
FTTx
7750
73xx
BTV
FTTx
73xxBTV
Per-sub
Per-sub
Per-subscriber Q-tagged circuits are sub-interfaces grouped into one common subnet
IP: 1.2.3/24
FTTx
7750
73xx
BTV
FTTx
73xxBTV
Multi-sub
Multi-sub
Option for Multi-subscriber VLANs with bridging in DSLAM. VLAN group interface to extend subnet
IP: 1.2.3/24