Transcript Presentations

FORUM ON NEXT GENERATION STANDARDIZATION
(Colombo, Sri Lanka, 7-10 April 2009)
Migration Towards Converged
Networks
Dr. Ghassem Koleyni
Colombo, Sri Lanka, 7-10 April 2009
Content
 Telecommunications
network
 Network
evolution
 Needs and expectations
 What is NGN?
 PSTN & ISDN evolution to NGN
 Standardization activities
 Conclusion
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Telecommunications Network
Core Network
Home
Access
Network Network
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Home
Access
Network Network
3
Network Evolution
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IP: Mid to late 1970’s (No QoS guaranteed)
Ethernet: 1973-1975 at Xerox
ISDN: Mid to late 1980’s (QoS guaranteed
while increasing the bandwidth, many new
services )
X.25: Mid to late 1980’s (transmission of data
without loss nor duplication)
FR: Mid to late 1980’s (QoS guaranteed while
increasing the bandwidth)
ATM: Early 1990’s (guaranteed QoS, increased
bandwidth, combined switching and transport
capability with high level of performance and
scalability)
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Vertically-Integrated Networks
Voice
Services
Data
Services
Video
Services
Voice
Services
Network
Data
Services
Network
Video
Services
Network
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Expectations (I)
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Reduced expenses
Fewer core switches and transit exchanges
Reduced CAPEX & OPEX
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Faster return on investment
Increased network efficiency and utilisation
Reduced deployment time
Fast and open service creation platform
One-stop shop for billing
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A set of management functions shared between
different services
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Open services architecture
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Expectations (II)
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Interoperable networks
Standardized interfaces and protocols
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Faster service deployment
Multimedia services support
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Guaranteed QoS and QoS differentiation
Access agnostic (copper, cable, fibre, wireless)
Service continuity between fixed and mobile
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Terminal portability
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Increased bandwidth availability
Secure, reliable and simple (ease of use)
Affordable
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The Evolution Trend
Switching
Circuitswitched
Packetswitched
Services
Telephone
services
Multimedia
services
Transmission
TDM based
SDH, PDH, etc.
Interfaces
Proprietary
Standardized
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NGN standardization in
ITU-T
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Chronology of NGN Standardization in
ITU-T

First workshop on NGN in ITU-T convened in
Geneva, 9-10 July 2003
Meeting convened with cooperation from SGs
11, 13, 16 and SSG (predecessor to SG 19)
Presentations from different interest groups
SG 13 was tasked to lead study group on NGN
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First JRG-NGN meeting, 29 September to 2
October 2003
Four draft Recommendations were generated
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NGN Focus Group was formed in May 2004
Study Group 13 (NGN SG) established by
WTSA-04 as the lead SG for NGN studies
NGN-GSI started in 2006 and is continuing
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Next Generation Network (NGN)
A packet-based network able to provide
telecommunication services and able to make
use of multiple broadband, QoS-enabled
transport technologies and in which servicerelated functions are independent from
underlying transport-related technologies. It
enables unfettered access for users to
networks and to competing service providers
and/or services of their choice. It supports
generalized mobility which will allow consistent
and ubiquitous provision of services to users.
Source: ITU-T RecommendationY.2001
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Different aspects of NGN (I)
Packet-based transfer
 Separation of control functions among
bearer capabilities, call/session, and
application/service
 Decoupling of service provision from
transport, and provision of open interfaces
 Support for a wide range of services,
applications and mechanisms based on
service building blocks (including real
time/streaming/non-real time services and
multi-media)
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Different aspects of NGN (II)
Broadband capabilities with end-to-end
QoS and transparency
 Interworking with legacy networks via
open interfaces
 Generalised mobility
 Unfettered access by users to different
service providers
 A variety of identification schemes which
can be resolved to IP addresses for the
purposes of routing in IP networks
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Different aspects of NGN (III)
Unified service characteristics for the
same service as perceived by the user
 Converged services between Fixed and
Mobile networks
 Independence of service-related functions
from underlying transport technologies
 Support of multiple last mile technologies
 Compliant with all Regulatory
requirements, for example concerning
emergency communications and
security/privacy
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In Brief
NGN, a single network providing services agnostic
to the underlying transmission technologies and
through different access networks
•
•
•
•
Simplicity
Increased productivity
Increase customer satisfaction
Increased revenue
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Horizontally Integrated Network
Management plane
Control
User plane
NGN Services Stratum
Management plane
Control
User plane
NGN Transport Stratum
NGN Basic Reference Model (NGN BRM)
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Separation of Services from Transport in
NGN
e.g., Video services (TV, movie, etc.)
e.g., Data services (WWW, e-mail, etc.)
e.g., voice telephony services (audio, fax, etc.)
NGN services
CO-CS, CO-PS and CLPS layer technologies
NGN transport
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General NGN Functional Model
Infrastructural, application,
middleware and baseware services
Services
NGN
Service
Resources
Transport management
functions
Transport control
functions
NGN
Transport
Resources
Service control functions
Service management
functions
Transfer functional area
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Applications
ANI
Management Functions
Application Support Functions & Service Support Functions
Service User
Profiles
Service Control
Functions
Service stratum
Transport User
Profiles
Network
Attachment
Control Functions
Resource and
Admission
Control Functions
Transport Control Functions
End-User
Functions
Other
Networks
Transport Functions
UNI
NNI
Transport stratum
Management
Media
Control
19
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Re-distribution of Service Intelligence
Migration of
Service Intelligence
User Access
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Core
Access
User
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PSTN & ISDN
Evolution to NGN
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What to consider when evolving
PSTN/ISDN to NGN
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Transport
Signalling and control
Management
Services
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Operation, administration and maintenance
(OAM)
Naming, numbering and addressing
Accounting, charging and billing
Inter-working
National regulations
Emergency telecommunications
Security aspects
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Bearer services
Supplementary services
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Different Approaches
 Call
server (CS)-based
Equipment re-use
Service continuity
 IP
multimedia sub-system
(IMS)-based
Immediate migration
Access to new services
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NGN: CS-based
Call Server
Cable, IAD, xDSL
PSTN
Packet
Switched
Network
Private Lines
Wireless
AN
PABX
ISDN
signalling
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Example of PSTN/ISDN Evolution
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NGN: IMS-based
IMS
Packet
Switched
Network
Other
networks
Other
networks
signalling
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PSTN/ISDN Emulation & Simulation
PSTN/ISDN emulation
Provides PSTN/ISDN service capabilities
and interfaces using adaptation to an IP
infrastructure.
PSTN/ISDN simulation
Provides PSTN/ISDN-like service
capabilities using session control over
IP interfaces and infrastructure.
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Emulation, Simulation, Interoperability and
Interworking with NGN
User
Equipment
NGN
(Carrier Y)
PLMN
User
Equipment
NNI
UNI
UNI
NGN
(Carrier X)
UNI
UNI
NNI
PSTN/ISDN
SIMULATION
Public IP
NETWORK
User
Equipment
EMULATION
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Evolution Strategy
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Transition cost
Business model
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Customer expectation
Are customers ready for changes?
If higher expenses are involved, are
customerst ready to pay?
Choice of technology
 Products and services to be offered
 Domestic regulations
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NGN Recommendations, Y Series
Frameworks and functional architecture
models
Y.2000–Y.2099
Quality of Service and performance
Y.2100–Y.2199
Service aspects: Service capabilities and
service architecture
Y.2200–Y.2249
Service aspects: Interoperability of services
and networks in NGN
Y.2250–Y.2299
Numbering, naming and addressing
Y.2300–Y.2399
Network management
Y.2400–Y.2499
Network control architectures and protocols
Y.2500–Y.2599
Security
Y.2700–Y.2799
Generalized mobility
Y.2800–Y.2899
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NGN Recommendations, Q Series
General
Q.3000–Q.3029
Network signalling and control functional
architecture
Q.3030–Q.3099
Network data organization within the NGN
Q.3100–Q.3129
Bearer control signalling
Q.3130–Q.3179
Signalling and control requirements and
protocols to support attachment in NGN
environments
Q.3200–Q.3249
Resource control protocols
Q.3300–Q.3369
Service and session control protocols
Q.3400–Q.3499
Service and session control protocols –
supplementary services
Q.3600–Q.3649
NGN applications
Q.3700–Q.3849
Testing for NGN networks
Q.3900–Q.3999
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Conclusion
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Substantial progress has been made in the
preparation of specifications addressing
evolution of networks to NGN
Good progress on signalling and protocol
work
More work needs to be done, specifically on
the OAM, management and control &
signalling aspects
Compliance to global standards
would reduce procurement costs and
promote inter-operability
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ADF
AG
AN
ANI
ATM
CAPEX
CO-CS
CO-PS
CLPS
CS
DSL
DTE
FR
IAD
IMS
IP
ISDN
IWF
LE
NGN
NNI
List of Acronyms )
Adaptation Function
Access Gateway
Access Network
Application Network
Interface
Asynchronous Transfer
Mode
CAPital EXpenditure
connection-oriented circuitswitched
connection-oriented
packet- switched
connectionless packetswitched
Call Server
Digital Subscriber Line
Data Terminal Equipment
Frame Relay
Integrated Access Device
IP Multimedia Sub-system
Internet Protocol
Integrated Services Digital
Network
Inter-working Function
Local Exchange
Next Generation Network
Network Network Interface
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OAM
OPEX
PABX
PBX
PDH
PLMN
PSPDN
PSTN
QoS
REV
SDH
SG
SIP
TDM
TE
TMG
TV
UAM
UNI
WWW
Operation, Administration,
Maintenance
OPerating EXpenditure
Private Automatic Branch
eXchange
Private Branch eXchange
Plesiochronous Digital
Hierarchy
Public Land Mobile Network
Packet Switched Public Data
Network
Public Switched Telephone
Network
Quality of Service
Reverse Charging
Synchronous Digital
Hierarchy
Signalling Gateway
Session Initiation Protocol
Time Division Multiplexing
Transit Exchange
Trunking Media Gateway
Television
User Access Module
User-Network Interface 33
World Wide Web
Thank you for your attention
Dr. Ghassem Koleyni
Email: [email protected]
Tel: +1 613 592 5344
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Back up slides
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ITU-T NGN Related Recommendations (Q Series)
Q.3030
Signalling architecture for the NGN service control plane
Q.3150
Use of virtual trunks for ATM/MPLS client/server control plane
interworking
Q.3151
ATM and frame relay/MPLS control plane interworking: Clientserver
Q.3201
EAP-based security signalling protocol architecture for network
attachments
Q.3201.1
Q.3300
Authentication protocols based on EAP-AKA for interworking
among 3GPP, WiMax, and WLAN in NGN
Architectural framework for the Q.33xx series of
Recommendations
Q.3301.1 Resource control protocol - Protocol at the Rs interface
Q.3302.1 Resource control protocol - Protocol at the Rp interface
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ITU-T NGN Related Recommendations (Q Series)
Q.3303.0
Protocol at the interface between a Policy Decision Physical Entity
(PD-PE) and a Policy Enforcement Physical Entity (PE-PE) (Rw
interface): Overview
Q.3303.1
Protocol at the interface between a Policy Decision Physical Entity
(PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS
Alternative
Q.3303.2
Protocol at the interface between a Policy Decision Physical Entity
(PD-PE) and a Policy Enforcement Physical Entity (PE-PE) (Rw
interface): H.248 Alternative
Q.3303.3
Protocol at the interface between the policy decision physical entity
(PD-PE) and the policy enforcement physical entity (PE-PE) (Rw
interface): Diameter
Q.3304.1
Resource control protocol no. 4 (rcp4). Protocol at the interface
between a transport resource control physical entity (TRC-PE) and
a transport physical entity (T-PE) (Rc interface): COPS alternative
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ITU-T NGN Related Recommendations (Q Series)
Q.3304.2
Resource control protocol no. 4 SNMP Profile. Protocol at the Rc
interface between a transport resource control physical entity
(TRC-PE) and a transport physical entity (T-PE) (Rc interface)
Q.3305.1
Resource control protocol - Protocol at the Rt interface
Q.3401
NGN NNI signalling profile
Q.3402
NGN UNI signalling profile (Protocol set 1)
Q.3900
Methods of testing and model network architecture for NGN
technical means testing as applied to public telecommunication
networks
Q.3901
Distribution of tests and services for NGN technical means testing
in the model and operator networks
Q.3902
Parameters to be monitored in the process of operation when
implementing NGN technical means in public telecommunication
networks
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ITU-T NGN Related Recommendations (Y Series)
Y.2001
General overview of NGN
Y.2011
General principles and general reference model for Next
Generation Networks
Y.2012
Functional requirements and architecture of the NGN
Y.2014
Network attachment control functions in next generation
networks
Y.2015
General requirements for ID/locator separation in NGN
Y.2021
IMS for Next Generation Networks
Y.2031
PSTN/ISDN emulation architecture
Y.2051
General overview of IPv6-based NGN
Y.2052
Framework of multi-homing in IPv6-based NGN
Y.2053
Functional requirements for IPv6 migration in NGN
Y.2054
Framework to support signalling for IPv6-based NGN
Y.2091
Terms and definitions for Next Generation Networks
Resource and admission control functions in Next
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Generation
Networks
Y.2111
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ITU-T NGN Related Recommendations (Y Series)
Y.2112
A QoS control architecture for Ethernet-based IP access network
Y.2113
Ethernet QoS control for next generation networks
Y.2121
Requirements for the support of flow state aware transport
technology in an NGN
Y.2171
Admission control priority levels in Next Generation Networks
Y.2172
Service restoration priority levels in Next Generation Networks
Y.2173
Management of performance measurement for NGN
Y.2174
Distributed RACF architecture for MPLS networks
Y.2201
NGN release 1 requirements
Y.2211
IMS-based real time conversational multimedia services over NGN
Y.2212
Requirements of managed delivery services
Y.2213
NGN service requirements and capabilities for network aspects of
applications and services using tag-based identification
Y.2232
NGN convergence service model and scenario using Web Services
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ITU-T NGN Related Recommendations (Y Series)
Y.2233
Requirements and framework allowing accounting and charging
capabilities in NGN
Y.2234
Open service environment capabilities for NGN
Y.2235
Converged web-browsing service scenarios in NGN
Y.2261
PSTN/ISDN evolution to NGN
Y.2262
PSTN/ISDN emulation and simulation
Y.2271
Call server based PSTN/ISDN emulation
Y.2401
Principles for the Management of the Next Generation Networks
Y.2601
Fundamental characteristics and requirements of future packet based
networks
Y.2611
High level architecture of future packet based networks
Y.2701
Security requirements for NGN release 1
Y.2801
Mobility management requirements for NGN
Y.2802
Fixed-mobile convergence general requirements
Y.2803
FMC service using legacy PSTN or ISDN as the fixed access network for
mobile network users
Y.2804
Generic framework of mobility management for next generation
networks
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Useful Links
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ITU
http://www.itu.int
NGN Global Standards Initiative (NGN-GSI)
http://www.itu.int/ITU-T/ngn/index.html
SG11 (Signalling & Control Protocols)
http://www.itu.int/ITUT/studygroups/com11/index.asp
SG 13 (Future Networks and NGN)
http://www.itu.int/ITUT/studygroups/com13/index.asp
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