Information
and Communication
Networks
Network Evolution towards profitable services
January 22, 2003
Copyright (C) Siemens AG - All Rights Reserved - Confidential
The road towards full convergence
Yesterday
Today
Voice-centric
Low bandwidth
Dial-in to data
N Data network
Different technologies
(ATM, FR, X.25, IP)
Best effort Internet Access
N PLMN (GSM)
Voice, SMS
Terminal mobility
Low bandwidth
N NGN fixed network
Voice / data
High bandwidth
QoS
N QoS data network
Pure IP
High bandwidth
Diffserv, Intserv, MPLS
N NGN PLMN (UMTS)
Terminal mobility
Voice / data
Broadband
QoS
Information and Communication Networks
Tomorrow
N Converged services and
networks
QoS data network
High bandwidth
SS7, SIP, H.248
User mobility
(mobile and fixed)
O&M
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1/15/2003 10/02, BT Benchmarking .ppt page 2
N PSTN / ISDN
Siemens' vision of 21st Century network architecture
SCP
some time
Softswitch, (Call Agent,
MSC-S,
CSCF, MGCF)
N Co-existence with
NGN
N Gradual migration of customers
Access
On
the
Move
UMTS/
UMTS/
GSM
GSM
WLAN WLAN
BS
PSTN
POTS/ISDN
Home
Broadband
Home,
SME
Corporate &
High End
SME
Open
I/f
Parlay, CORBA
N PSTN and PLMN will be about for
Call
Contr.
CDN
Appl.
IN
Signaling
VLR
(STP, SGW, GTT, LNP) HLR
Service Control
N Who owns the intelligence
wins the revenue
!
COPS,
…
SIP, MGCP / MEGACO
PSTN / PLMN
Mobile
Mobile
Access
Access
Gateway
Gateway
• Open interfaces
elementenvironment
N Openbetween
service creation
layer andNOSS
Agnostic to deliveryIPnetworks
Core
• Customer centric view
• Customer access to management
IP / Ethernet Metro
N Multiple access technologies (WLAN, xDSL,
VPN
GE, …)
• Multi-Service
Integration on the
N DSLAM is evolving into the prime
multi-service
VoTDM
VoTDM
GE gateway
optical layer
access
ATM/
ATM/
Data, VoIP
VoIP
Data,
• Dynamic assignment of
Ethernet
Ethernet
Voice
RPR / MPLS
Multi Service
Service
Multi
Edge
(MPLS)
capacity
xDSL
xDSL
Acc. Gatew.
Gatew.
Acc.
Gateway
Router
Core
HGW
N Low end CPE - a commodity
N High end CPE - multi service platform,
• Becomes commodity
mobility, security and managed
• GE and Lambda products in metro
N Customer lock-in by delivering managed
• Legacy ATM access
Ethernet // services
Ethernet
NG
Multi-Service
Optical
Networking Platform
LL // VPN
VPN
LL
• QoS
support
Customer
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 3
of multiple control architectures.
Resource Control / Self Managing Network
Management / OSS
Applications /
Content • Co-existence and interworking
1/15/2003 10/02, BT Benchmarking .ppt page 4
Customer Premise
Equipment
Information and Communication Networks
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Evolution of CPE devices
Support of
different
service
quality
Remotely Managed
& Upgradable
Connectivity
to Multiple devices
on Home Network
Networking
Within the
home
Broadband
Connectivity
to One Device
Modem
1999
Internet
Enabled
devices
Router
2000
2001
Information and Communication Networks
Service gateways
2002
2003
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1/15/2003 10/02, BT Benchmarking .ppt page 5
Mobility
&
Security
Dynamic Delivery
Of New Services
Intelligent Services Gateway
The Interface to different Application Domains
Home Gateway
External
BB network
Home Management
Communications,
Information,
Work-At-Home,
Education
Information and Communication Networks
Entertainment
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1/15/2003 10/02, BT Benchmarking .ppt page 6
Home Security
Wireless Connectivity
1/15/2003 10/02, BT Benchmarking .ppt page 7
Access
Information and Communication Networks
Copyright (C) Siemens AG - All Rights Reserved - Confidential
Access networks
The evolution to broadband is the most demanding challenge
Investment is focused towards these access solutions
Mass rollouts of ADSL
SHDSL as LL replacement and with VoDSL (BLES) – OLOs, mainly
VDSL field trials – central office and cabinet-based solutions
Upgrade of Cable TV networks with cable modem technologies, mainly
in US – however, signs of growth in Europe
Niche solutions
N Point-to-multi-point radio systems
N Fiber-to-the home / building evolves slowly, mainly due to high
costs of civil works
N Power line systems
N Broadband satellite systems
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 8
N
N
N
N
Multiservice access
The DSLAM grows up!
Advanced
residential – SME
Home
gateway
xDSL
POTS
ISDN-BA
ISDN-PRA
V5.x
E1 / LL
WLAN BS
Phase 1: Separate backbones for voice and data
Initial DSL roll-out
Multi-service access combines voice and
data access capabilities in a single backbone
Bundle DSL with a new POTS
proposition and get rid of legacy
features!!!
Phase 2: Packed-based backbone for voice and data
Evolution and gradual DLE replacement
Media Gateway Controller
Signaling Gateway
Call Feature Server
Vo
ice
TDM network
P/
MGC
8
H.24
Dat
a
Voi
ce a
Dat nd
a
IP network
Information and Communication Networks
Any
DSLAM
QoS IP network
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1/15/2003 10/02, BT Benchmarking .ppt page 9
Residential
Splitter /
Modem
Access - Extend the DSL footprint
N Economically extending the
footprint of DSL
N Most cost-effective backhaul
N 4 wire SHDSL
Twice the bandwidth 4.6 Mbps ~3 km reach
Enhance the reach at 2.3 Mbps ~5 km reach
N ADSL+
N Cabinet deployment
N Scalable DSLAMs - micro DSLAM and pizza boxes
N VDSL-CO and cabinet-based (geographical approach)
N ATM and / or GE
ATM for assured services
Today, GE for best effort only
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 10
Our approach / solution
Challenges
1/15/2003 10/02, BT Benchmarking .ppt page 11
Control
Information and Communication Networks
Copyright (C) Siemens AG - All Rights Reserved - Confidential
PSTN evolution
N The classical PSTN market is stagnating
N Obsolescence is not key, but lack of flexibility within current
PSTN network is a limiting factor
N Main threat for PSTN operators:
N Main opportunity for PSTN operators:
Migration of existing infrastructure towards broadband
N Voice drives the revenues of the telcos, but focus for investment
is NGN
N Media gateways, call feature servers, and signaling gateways
are the key building blocks of a multi-service architecture
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 12
Shift of telephony services to other infrastructure providers
The call control challenge
Our approach / solution
Challenges
N Network restructuring &
N
N
N
N Introduction of uniform signaling network
N Underpin signaling network with full SG
capability
N Add network overload protection
N Full carrier grade characteristics on call
control
N Evolution of Service Intelligence Domain
Concept
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 13
N
simplification for cost
effective NGN
infrastructure
Dramatic growth of
signaling entities (n2
problem)
Migrate legacy network
functionality
Bridge between traditional
PSTN and NGN networks
Combine voice control
domain (e.g. SIP)
and data control domain
The SIP challenge
Who's selling the services?
Security,
Authentication
MM PC
Session Control Layer
LAN
DSL
Modem
SIP
Proxy
Server
SIP
MM PC
MyService
Applications
SIP
Proxy
Server
3rd party
applications
DSL
Modem
SIP
Call data
IP
IP
IP
PER
IP
Network Layer
PER
IP
IP
Connectivity
Information and Communication Networks
SIP
Phone
SIP
DSL
Modem
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1/15/2003 10/02, BT Benchmarking .ppt page 14
Presence
IM
The SIP Challenge
Ownership of user data for solid business model
MyService
ISP
MM PC
DSL
Modem
3rd party
applications
3rd party
applications
3rd party
applications
SIP
Proxy
Server
LAN
User Database,
Security,
SIP
AuthenProxy
tication
Server
SIP-Phone
UTRAN
UMTS
Information and Communication Networks
PER
Presence
IM
Network Layer
PER
Connectivity
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Applications
1/15/2003 10/02, BT Benchmarking .ppt page 15
DSL
Modem
The move towards value-added services
N Value-added services will become the main differentiator
N Most added value services are based on voice, data, and
mobility convergence and require support beyond best effort
Business vision
IP networking
Transport service
Customer
confidence
Security
Customer
service
QoS
Availability
Reliability
Mission critical business
applications
Business
specific
applications
e-Commerce
Web hosting
IP VPN
Key requirements
Business
leadership
(innovations)
Differentiation: Business opportunity
Commodities
Information and Communication Networks
Operational
leadership
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1/15/2003 10/02, BT Benchmarking .ppt page 16
Services
The service architecture delivers:
N Service models focusing on the experience, not the connection
N Business models that are flexible and easily adaptable
Different services for different markets with different billing
Simultaneously delivery of:
Low volume / high margin services
High volume / lower margin services
N Drive model from bits to experiences
N Product creation and definition for fast market trial
Service Models
Assured experience
VOIP
VPN
GAMING
Better than best effort
INET
Best effort
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 17
The new service architecture
The New Broadband Service Control Architecture
Service Intelligence Domain
N The "IN" of the data network
N Virtualization of the service
Customer-centric view
N Manage services, not bits
N Real time changes to the
Network / service
management
Service Delivery Domain
Access
On the
Move
PSTN
Home
Broadband
home,
SME
Content
domain
IP Core
WLAN WLAN
BS
VPN
POTS
/ ISDN
ATM /
Ethernet
xDSL
HGW
Edge
Router
Information and Communication Networks
(MPLS)
Core
N Delivers scalability and reach
"Any Access"
DSL & WLAN
N Service Resiliency
N Carrier-, not enterprise-focused
N Performance for all traffic types
N Virtualization of the network
N Meditation of legacy systems
N Ease of management
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1/15/2003 10/02, BT Benchmarking .ppt page 18
connection between
Customer and content, or
Customer and customer
Policy management
(service control)
Example: The Turbo Mode - Opera’s ad based
browser talks BRAS
Demand for more Speed
+ User ID
IP Core
Content
domain
Edge
Router
Higher Bandwidth
+ Advertising
(MPLS) Core
BRAS
Opera Browser
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 19
• Opens an Ad Window
• Demands Higher Speed from the Unisphere ERX Router
• Sends Unique User ID Data to the ISP
• ISP Allows more Speed and Sends Targeted Advertising
The New Broadband Service Control Architecture
(Session Control)
other
SIP Apps.
Voice
Softswitch
Service Intelligence
SIP-T
N Architecture allows separation
SIP-T
SIP
Service Selection Control
SIP Proxy
Access
On the
Move
PSTN
Home
Broadband
home,
SME
MGCP/H.248
SIP
Service Delivery Domain
of service selection and service
interaction
N Service interaction most
probably SIP based
N Architecture allows controlled
access of independent service
providers (e.g. gaming, VoD)
N controlled access b/w
N controlled QoS
N billing/accounting
possibilities
IP Core
WLAN WLAN
BS
PSTN / PLMN
VPN
POTS
/ ISDN
ATM /
Ethernet
xDSL
HGW
Edge
Router
Information and Communication Networks
(MPLS)
Core
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1/15/2003 10/02, BT Benchmarking .ppt page 20
Gaming
e.g. VoD
Challenge: IP-QoS & IP-Resilience
Our approach / solution
Challenges
Different approaches for access / metro and core networks:
x Hierarchical and scalable resource management for
access & core
x Access control at the edge – not stateful inside core
o Adaptive and dynamic QoS management
oResearch project AQUILA
Core QoS / Resilience:
x Admission control at edges – no statefull capacity
reservation inside
x Multi path routing for advanced resilience
x Automated, adaptive, autonomous network control
oResearch project KING
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 21
x Guaranteed QoS
o Multimedia real time appl.
x Service Differentiation
o Billing of QoS as service
o Add. revenue
x Subsecond network resilience
o Mission critical appl.
x Efficient network operation
o Reduced OPEX & CAPEX
Access / Metro / Core QoS:
1/15/2003 10/02, BT Benchmarking .ppt page 22
Migration
Information and Communication Networks
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Migration Timeline - Our view
• Drive revenue
Application
Control
QoS
• Move from bandwidth to service revenue
• Uniform access for DSL and WLAN
• Support Service business
and voice
customer
Mobility applications
• Pre-requisite to NGN architecture
• Gateway between ‘new’ and ‘old’ world
Web based applications
networks to enable co-existence
• Gradual evolution and migration of customers
• Introduce network protection
and Control Layer
from PSTN to NGN (obsolescence)
BB Service
surveillance mechanisms.
• Start in small sites
Softswitching
• Introduce combined DSL-POTS ports
Uniform Signalling •Layer
In addition to POTS base line
• Catch SOHO and SME market
• To support derived voice, web-based
• Obsolescence
Multi-Service
access
gateway access gateways
services
& Multi-service
Access
• Catch the VoIP enterprise market
WLAN
• Continue to roll-out WLAN hotspots to
CPE
HGW (derived voice)
capture the market - introduction of
mobility type products
2002
2003
2004
Information and Communication Networks
2005
2006
2007
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2008
1/15/2003 10/02, BT Benchmarking .ppt page 23
Core
Today's Network
Overview
Access
Aggregation
Core
Transit
SW
Servers &
Special Routers
Transit
SW
e.g. ERX
BB-RAS
DMZ
Gwy
FW
Web …
SDH/DWDM
Local
SW
Local
SW
SDH
PBX
POTS/ISDN/PABX
DSL CPE
CPE
LAN
ATM
SOHO
Local-Loop
Enterprise IP
Connection
Single or multi home
PBX
CPE
LAN
PBX
IP Terminals
POTS/ISDN/PABX
Information and Communication Networks
IP Terminals
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TDM
IP
All IP Network
Multi Operator Scenario
Access
Aggregation
Operator B
Core
Core
Backbone
BB-RAS
BB-RAS
VPN: PPP or MPLS
Provider vs CPE
provisioned
POTS
Trunks
DSL CPE
RAS selection
CPE
LAN
IP Terminals
IP Terminals
IP Terminals
Information and Communication Networks
Access
Aggregation
L2:
- Low CAPEX & OPEX
- Fast Failover
QoS:
- Engineering needed
- 801.1p Prio. Ehternet
- No advantage for MPLS
- MPLS needs awareness
throughout the path
Regulatory:
- More Transparency
- e.g. RAS of other OP.
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Operator A
•
L2/L3 Costs
• Full wire speed routing
with L3/L4 MPLS …
• L3 Routing only
•
•
•
•
•
Sophisticated routing functions increase OPEX
and CAPEX
MPLS solves special peering relations but is too
expensive for the mainstream.
Management is expensive for complex routing
L2 provides enough resilience
L2 is cheap to manage
L2 has a limit on hosts in a given LAN.
(Scalability limitations)
• L2 Switching with
resilience
• Simple L2 Switching
OPEX are often more important then the initial
CAPEX.
There is no single solution for all deployment options L2/L3
and MPLS/Diffserv… will all exist in networks
Information and Communication Networks
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1/15/2003 10/02, BT Benchmarking .ppt page 26
All IP Network
L2 Switching / L3 Routing Tradeoff