Transcript Soft Switching and Gateways

Enzo Garetti
Maurizio Siviero
Paolo Senesi
Corrado Moiso
Telecom Italia Lab
2nd May 2001
Next Generation Services &
Next Generation Networks Soft Switching & Gateways
Content
• 1 Presentation
•
•
•
•
Market Evolution
Next Generation Services
Soft Switching & Gateways
Next Generation Networks
• 2 Annex
•
•
•
•
Market Evolution - Details
Next Generation Services - Details
Soft Switching & Gateways - Further details
Next Generation Networks – Details & Applications
NGN – Soft Switching & Gateways
2
2
Market Evolution
• Telecommunication Services
• Voice & Data Services
• Fixed & Mobile Services
• Networks & Equipment
• Fixed & Mobile Switched
Networks for Voice & Data
• Switching & Networking
Equipment
Datamonitor forecasts:
• Growth of data traffic
• Pessimistic, optimistic, probable
• Value of traffic
• Voice very expensive, Data very cheap
• Traffic revenues
• Steady voice revenues, growth of Data
revenues
Europe (history):
• Saturation of PSTN lines
• Growth of mobile subscribers
• Growth of data traffic
• ISDN, PCs, Internet accesses
Europe (history):
• Growth of the service market
• Steady equipment market
• 85% services, 15% equipment
Nokia forecasts - Growth of:
• the global market
• cellular subscribers
• PCs connected to Internet
• mobile accesses to Internet
• Mobile Internet/Intranet services
OVUM forecasts:
• Growth of NGN access lines
• Steady fixed telephone lines
• Partnerships, Acquisitions, Rationalisation
• New Telecom Service Providers, Carriers’ Carriers, Consolidation
• New Architectures, Optical Solutions, Multi-Service Systems
Dittberner (structural trends):
NGN – Soft Switching & Gateways
3
3
Next Generation Services
• Evolution of Service Control:
• New Services & Applications
• IP – based packet networks
– Telephone Exchange
– IN, AIN, Service Nodes
• Converged Services:
– Telecommunications & Internet
– Voice & Data, Fixed & Mobile
– SS7 Signalling Network
• Evolution towards the Information Society:
– Exchange of messages (Anyhow,
Anytime, Anywhere)
• Next Generation Services:
• voice, data and multimedia traffic
– Advanced management
– High level of personalisation
– Exploiting any interaction mean (Sound,
words, text, images)
– Decoupling the user from the terminal
and the connection used
• Diversification of the roles
in the value chain:
–
–
–
–
–
–
Content
Application
Service
Caching
Intermediation
Network
NGN – Soft Switching & Gateways
• Progressive integration of
Telecommunication & IP functions
• Integrated IP/Telecom Services
• Paradigm Shift:
• Networking of Servers
–Telephone approach
– long term planning
–Internet approach –
try and error
4
4
Soft Switching & Gateways
• Servers for IP Telephony:
– H.323 standards
– Gateways
• Gatekeeper functions:
– Address translation
– Telephone numbers – IP addresses
– Interworking with PSTN
– Admission control
– Interworking with IP nodes &
terminals
– Other gatekeeper functions
– Gatekeeper (Softswitch)
– Processing of call set-up
information
– Call control signalling
– Call authorisation
– Call management
• Servers:
– Instructions for IP packet routing
–
–
–
–
– RAS (Registration, Admission and
Status) protocol (H.225)
• SS7 and IP:
• Feature Server:
– H.323, H.225, H.245 standards
– Signalling translation within Gateway + Gatekeeper
– SCP/SSP functions & Service Nodes
– TCAP over IP
NGN – Soft Switching & Gateways
Directory services
Registration
Authorisation
Policy services
– Database look-up
– SCP
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5
Next Generation Networks
Users of the
platform
Intelligent
Network
ASP
Directory
Start-up /
Incubator
Application Servers
Corporate
Clients
High
Residential / SME
!
Signalling
Agent
Line
Gateway
Residential / SOHO
Users of the
final service
Policy
Repository
Enabling
Network
Elements
NGN – Soft Switching & Gateways
Unified-messaging
Device
Server
Call/Session
Control
Control Functionalities
R
Billing /
E-Commerce
User/Service
Agent
AAA
Content
Provider
Legacy networks
Mobile
Network
Signalling
Network
Integrated
Networks
PSTN
Policy
Decision
Point
Big Internet
Trunking
Gateway
Edge
Router
Transport Network (TN)
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6
ATM Network
Metropolitan
Networks
Conclusion
• Market Evolution:
– Saturation of fixed lines
– Data overcoming voice
– Mobile overcoming fixed
• Next Generation Services:
– Evolution of Service Control
– Converged Services, NGS
– Integration of
Telecommunication & IP
functions & Services
– Networking of Servers
– Diversification of the roles
– Paradigm Shift
NGN – Soft Switching & Gateways
• Soft Switching & Gateways:
– Servers for IP Telephony:
• H.323 standards
• Gateways
• Gatekeeper (Softswitch)
– SS7 and IP
• Next Generation Networks:
– Application Servers
– Control Functionalities
– Enabling Network Elements
– Transport Network
– Gateways to Legacy Networks
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7
Annex
• 1 Presentation
•
•
•
•
Market Evolution
Next Generation Services
Soft Switching & Gateways
Next Generation Networks
• 2 Annex
•
•
•
•
Market Evolution - Details
Next Generation Services - Details
Soft Switching & Gateways – Further details
Next Generation Networks - Details
NGN – Soft Switching & Gateways
8
8
Market Evolution
• Telecommunication Services
• Voice & Data Services
• Fixed & Mobile Services
Europe (history):
• Saturation of PSTN lines
• Growth of mobile subscribers
• Growth of data traffic
• ISDN, PCs, Internet accesses
NGN – Soft Switching & Gateways
9
9
Market Evolution
• Networks & Equipment
• Fixed & Mobile Switched
Networks for Voice & Data
• Switching & Networking
Equipment
Europe (history):
• Growth of the service market
• Steady equipment market
• 85% services, 15% equipment
OVUM forecasts:
• Growth of NGN access lines
• Steady fixed telephone lines
1200
1000
800
Fixed Telephone Lines
600
Next Generation Network
Access Lines
400
200
0
2000
NGN – Soft Switching & Gateways
Source:
Ovum 1999
2001
2002
10
10
2003
2004
2005
Market Evolution
Rel. Bit
Volume
Traffic Projections for Voice & Data
250
Data
(IP)
200
150
Voice
100
50
1997
1998
1999
2000
2001
Source: Multiple IXC Projections
NGN – Soft Switching & Gateways
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11
Market Evolution
NGN – Soft Switching & Gateways
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12
Market Evolution
Datamonitor forecasts:
• Growth of data traffic
• Pessimistic
• Optimistic
• Probable
• Value of traffic
• Voice very expensive ‘
• Data very cheap
• Traffic revenues
• Steady voice revenues
• Growth of Data revenues
Source: Datamonitor 2000
Source: Datamonitor 2000
Source: Datamonitor 2000
NGN – Soft Switching & Gateways
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13
Market Evolution
Source: Nokia 2000
Nokia forecasts - Growth of:
• the global market
• cellular subscribers
• PCs connected to Internet
• mobile accesses to Internet
• Mobile Internet/Intranet services
Source: Nokia 2000
NGN – Soft Switching & Gateways
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14
Market Evolution – Structural Trends
• More Strategic Partnership:
– Suppliers & Service Providers; Beta trials.
• Less Reliance on Supplier Internal Resources for Development:
– Acquisitions of “start-up” high technology firms
• Move of Significant Vendors of PSTN Switching Equipment to Provide
Packet Exchanges
• New Telecom Service Providers:
– Next Generation Systems for new entrants; gradual approach for incumbents
• Telecom Operators Undergoing Supplier Rationalisation:
– Reduce the number of suppliers; economies in Maintenance & Operation
– New Major Operators are Introducing New Network Architectures
– TDM, IP, ATM, DWDM; dedicated wavelength (or fibre) for different traffic
– Optical Switching May Reduce Packet Switching Traffic Handling
– Optical cross-connects
– Carriers’ Carriers are Becoming a Significant Factor in Industry
Structure
– Bulk transmission; reducing costs
– Consolidation of Major Service Providers
– Bell Atlantic + Nynex + GTE, Vodaphone + Air Touch + Mannesmann
Source: Dittberner Associates, Inc 2000
NGN – Soft Switching & Gateways
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15
Next Generation Services
• Converged Services:
• Evolution of Service Control:
– Telephone Exchange
– Number translation
– Telecommunications & Internet
– Voice & Data
– Fixed & Mobile
– Switching & Routing
– IN, AIN, Service Nodes
– Database look-up
– SSP & SCP
– SS7 Signalling Network
• New Services & Applications
• IP – based packet networks
• Control issues
NGN – Soft Switching & Gateways
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16
Next Generation Services
• Evolution towards the
Information Society:
– Exchange of messages
– Anyhow Anytime, Anywhere
• Next Generation Services:
– Combining voice, data and
multimedia traffic
– Advanced management
– High level of personalisation
– Exploiting any interaction mean
– Sound, words, text, images
– Decoupling the user from the
terminal and the connection used
• Integrated IP/Telecom Services
• Existing (Internet Call Waiting, Clickto-dial, Web-based Customer
Provision & Billing, Unified
Messaging)
• Advanced (Virtual Environment,
Virtual Presence, Enhanced VPN)
• IP Telephony (Existing offer, cost
reduction claim, management & QoS
issues
NGN – Soft Switching & Gateways
• Progressive integration:
– Functions traditionally offered by the
telephone network
– Functions provided by IP networks
• Networking of Servers
• Convergence of IP & AIN capabilities
• NGS business opportunities:
– Rich, diversified and personalised
service portfolio
– New functions provided by NGN
– Integration of IN & IP functions
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17
Next Generation Services
Application
Provider
Network/
Service
Intermediation
Provider
Final
Client
• Diversification of the roles in the value chain:
– Application Service Provider
– Content Provider
– Caching Provider
• Possibilities of intermediation among the upstream actors
in the value chain and Service Provider/final client:
– communication portal
– new business opportunities with benefits for the final client:
towards the free access to a bundle of services, with usagebased revenues (e-commerce, one-stop shopping, …)
NGN – Soft Switching & Gateways
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Next Generation Services
New approach for the launch of services
Classical telephonic approach: long-term planning
Ideation
Definition of
requirements
Design
Trial
Network
Deployment
18 months
Internet approach: trial and error
A set of services
is launched ...
…some
will succeed!
Focus on single services not as eventual “killer applications”, but as a driver
(requirements, functionalities) for an infrastructure devoted to improve the
modalities of provision of the various services.
NGN – Soft Switching & Gateways
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19
Soft Switching & Gateways
• Servers for IP Telephony:
– H.323 standards
– Gateways
– Interworking with PSTN
– Interworking with IP nodes &
terminals
– Gatekeeper (Softswitch)
– Processing of call set-up
information
– Instructions for IP packet
routing
– RAS (Registration, Admission
and Status) protocol (H.225)
• Gatekeeper functions:
– Address translation
– Telephone numbers – IP addresses
– Admission control
– Gatekeeper discovery
– Endpoint registration
– Endpoint location
– Other gatekeeper functions
– Call control signalling
– Call authorisation
– Call management
Source: Dittberner Associates, Inc 2000
NGN – Soft Switching & Gateways
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Soft Switching & Gateways
• Servers:
• Gatekeeper components:
– Directory database server
– Gatekeeper Manager
– Registration database server
– H.225.0 RAS
– Authorisation database server
– H.225.0 Call Signalling
– H.225 RAS server
– H.225.0 Control Signalling
– Policy server
– Billing Services
• SS7 and IP:
– Directory Services
– Security Services
– H.323, H.225, H.245 standards
– Policy/Call Management
– Signalling translation within
Gateway + Gatekeeper
– Transport Protocols & Network Interface
– SCP/SSP functions & Service Nodes
– TCAP over IP
Source: Dittberner Associates, Inc 2000
NGN – Soft Switching & Gateways
• Feature Server:
– Database look-up
– SCP
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Next Generation Networks
• Concept of Carrier-Class and SLA Management:
– evolution of the Carrier-Class concept;
– mechanisms to support SLA
differentiation/control/management.
• Policy-based Networks to support network-based
services:
– QoS control within the network;
– provisioning/customer service management.
• Control Aspects:
– Modalities for call/session acceptance & control
within multi-service networks;
– Evolution of the SoftSwitch to support
innovative/integrated services
• New terminals/CPE/CLE:
– Control modalities;
– manageability, remote maintainability;
– new characterisation modalities
NGN – Soft Switching & Gateways
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NGN - High Performance Data Networks
Data Network Architecture
Enterprises
ACCESS
Server
Server
CORE
ROUTING &
SWITCHING
EDGE
ROUTING
•
•
•
•
•
•
•
•
•
•
•
Packet classification
Access control
Resource management
Security/filtering
Traffic data collection
Profiles/service policy
• Rich, flexible and
evolvable functionalities
• Support to the service
policies of the operator
• Management support
NGN – Soft Switching & Gateways
Consumers
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Performance
Capacity
Scalability
Dependability
Congestion
control
• Very high
performance
• Simplified
functionalities
• Fault tolerance
NGN - New Telephony
Solutions for New Telephony
• Voice as a component of a more articulated
service
• Network-based services
• Infrastructural innovations for a simplicity &
flexibility in the service provision
TECHNOLOGIES
•
•
•
•
• time-to-market reduction, opening towards third
parties, ...
SERVICES
• voice-based
• enabling platform
• Results towards different clients
• ILEC, Vendors, Corporate, ISP, CLEC, ...
TEST BEDS
• focus on services
• coherence with the new business models
• brokering/retailing/reselling, services towards
the other actors of the value chain
• interworking issues with the existing situation
NGN – Soft Switching & Gateways
Architectures
Control/management
Interworking
Terminals/CPE
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24
NGN - New Telephony
Solutions for New Telephony
 Network Architecture
 Interworking Systems
for voice (Media Gateway)
for the signalling
(Signalling Gateway)
Control
Platform
 Signalling protocols &
systems
!
R
 Control Systems
calls
networks/services
resources
xDSL
PSTN
Broadband
Access Network
!
R
DSLAM
IP
BackBone
 Management aspects
 Voice Quality
NGN – Soft Switching & Gateways
Voice
Gateway
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25
NGN - IP Networking
Management Services
Value Added
Networking Services
Proxy
Netw. Cache Directory
&
policy
VAS
Location
User
profile
AAA
Server
Internet core
Internet
backbone
•Network efficiency
•Good peering/transit policy
•Advanced networking services
Corporate & business
•Turn-key solutions
•Vertical integration
•CNM solutions
•Design consulting
NGN – Soft Switching & Gateways
•Content delivery suites
•Application hosting
•VAS (e. g. fax server)
•Networking policies
•Performance monitoring
•SLA management
•Number of users
•Click rate
•Economies of scale
•Low cost solutions
Internet access
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NGN - Enterprise Internet Solutions
 Design & integration of complete solutions:


Data Intranet, IP VPN, Voice-data integrated solutions (VoATM, VoIP)
video communication solutions & multicast audio-video solutions
over Intranet
 Support to operation:

re-dimensioning, management, monitoring
INTERNET
SOHO
IP
network services
ATM/FR
network services
PSTN/ISDN/PLMN
Headquarter
New solutions for corporate networks
NGN – Soft Switching & Gateways
Remote Site
Mobile User
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