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


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


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


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

...


IASPPartners

IP Backbone


ADSL2+VDSL2GPON

Page 5


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


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

Page 7


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


GE

Per SubVLAN

VoIPVideoHSI

This QoS Enabled IP Network is not the Internet

HSI - High Speed Internet

Page 8


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


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


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




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




Gen 2:Multi-Service




Gen 2:Multi-Service

GamingGamingP2PP2P


Gen 3:Multi-App

GamingGamingP2PP2P


GamingGamingP2PP2P


Gen 3:Multi-App

Page 11


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


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

...


IASPPartners

IP Backbone


ADSL2+VDSL2GPON

HomeGateway

BTVBTV

...


IASPPartners

IP Backbone


ADSL2+VDSL2GPON

Page 13


www.alcatel.com

Page 14


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


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

Documents

All rights reserved © 2005, Alcatel 1 Quality of Service in IP Networks Scott Nelson