ngn next generation network
TRANSCRIPT
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NGNNext Generation Network
Concepts
Havar Bathaee
University of Tehran
December 7, 2014
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Agenda
Introduction
NGN Definition
NGN Standardization
NGN Conceptual Model
Convergence Towards NGN
NGN Softswitch-Base Architecture
NGN Configuration and Topology
Conclusion
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Introduction
Today, telephony, the Internet, and the cellular mobile
networks continue to be different domains, each has its own
protocols and services.
PSTN
INTERNET MOBILE
NGN
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Others…
All-IP Network
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Introduction General Idea
Packets
Voice
Data
Multimedia
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IntroductionHistory
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NGN Definition
NGN is a packet-based network able to provide
Telecommunication Services to users and able to make use of
multiple broadband, QoS-enabled transport technologies and in
which service-related functions are independent of the
underlying transport-related technologies. It enables unfettered
access for users to networks and to competing service providers
and services of their choice. It supports generalized mobility
which will allow consistent and ubiquitous provision of services to
users.
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NGN Definition
Unified Global Networking Platform
Packet-Based Network
Provides Telecommunication Services to Users
QoS-enabled Transport Technologies
(Delay, Throughput, and Reliability)
Services are Independent of Transport Technologies
Unfettered Access for Users to Networks and Services
Generalized Mobility Which Allow Consistent and
Ubiquitous Provision of Services to Users
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Characteristics
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3GPP
NGN StandardizationKey Players
ITU-T
ITU Telecommunication
Standardization Sector
ITU-TNGN-GSI
ATISNGN FG
ETSITISPAN
ATIS
Alliance for Telecom.
Industry
ETSI
European Telecom.
Standards Institute
3GPP
3rd Generation Partnership
Project
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NGN StandardizationKey Players (continued)
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NGN StandardizationProblems
Within the NGN concepts the standardization institutions are still
working on the following issues and problems:
• Existing networks migration towards NGN
• Development in the field of access technologies
• Connection of other networks to IP networks
• Provision of services and development of new ones
• Interworking in the area of addressing
• Interworking of signaling systems
• Roaming a mobility
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NGN Conceptual Model
Fixed, Data, Cable,
Wireless fixed, Mobile,
Satellite
Transmission Packet
network, VOIP, Media
gateways, Signalling
gateway, Core Packet
network
MGC, Softswitch, Call
Agent, Gatekeeper
NGN applications and
services, application
server, features server,
media server
Access to
NGN
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In the NGN it is required that the network control is not determined
only by the terminal equipment applications, but that the network
intelligence may carry out control over the network at all levels.
Management layer
Management layer tasks:
Resource management (capacity, ports, and physical elements)
and QoS in access to the network and the transport network
Various media processing, encoding, data transfer (information
flows)
Management of calls and connection. Management and
interworking of all elements of the reference architecture
Service control
NGN Conceptual Model
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Convergence towards NGN
Today’s network is divided into:
• Public Switched Telephone Network
• Packet Switched Networks (LAN, WAN,…)
• Cellular Mobile Networks
Convergence is the process of interconnection of traditional switched
circuit networks (PSTN and Mobile Networks) and packet-base
networks that use IP (Internet Protocol).
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Migration scenarios of different types of networks platforms are
based on the idea to integrate TDM (Time Division Multiplexing)
and IP (Internet Protocol) platforms into one converged NGN
platform (from the point of network infrastructure, as well as
services).
Evolutional scenarios
TDM
IP
NGN
Convergence towards NGN
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Evolutional scenarios (continued)
Convergence towards NGN
PSTN & IntelligentNetworks
Internet & DataNetworks
Cable Networks
Wireless & Mobile Networks
InternetTelephony
HybridNetworks
VoIPNetworks
VoCATV
GSM GPRS UMTS
NGN
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From Vertical Silos to Horizontal NGN Architecture
Convergence towards NGN
Transport
Service
Control
Application
Access
End Points
Mob
ile
Net
work
s
PS
TN
/IS
DN
Data
/IP
Net
work
s
Cab
le/T
erre
stri
al
TV
Vertical Silo Architecture
per service
Services
Existing and Newly Emerging
Services
Horizontal Layered
Multi-Service Architecture
Services & Network Control
(QoS, Security, IP Mobility)
Multi-Service IP Backbone
Wireless
AccessWireline
Access
Services
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Comparing the Features of PSTN/IN, Internet, and NGN
Convergence towards NGN
PSTN/IN Internet NGN
Multimedia Services NO YES YES
QoS support YES NO YES
Network Intelligence YES NO YES
Intelligent Terminal Equipment NO YES YES
Integrated Supervision & Control YES NO YES
Reliability High Low High
Service Creation Complex ad-hoc Systematic
Simplicity of Services use Medium High High
Modularity Low Medium High
Time of Service Introduction Long Short Short
Openness of Architecture Small High High
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NGN Softswitch-Base Architecture
Access
Network
PSTN /
IN
RTP
RTCP
VoIP
IP / MPLS
MGCP
H.323
SIP
Trunking
Gateway
(MGW)
TDM RTP/RTCP
Access
Gateway
Media
ServerApplication
ServerSIG
T
M
Signaling
Gateway
Media
Gateway
Controller
SIP
SIP
MGCP
H.248
MGCP
H.323
SIP
MGCP
H.248
Media Gateway ControllerSIP-T, BICC
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AG
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NGN Softswitch-Base ArchitectureComponents
M
Media Gateway
Controller
Generally serves as components for controlling of communication
relations of users and other network components; provides call
routing, network signaling, billing, and other logical functions.
Call Agent Softswitch
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NGN Softswitch-Base ArchitectureComponents
T
Media Gateway
Operate within transport plane, perform all function related to media
physical transport between different networks, media processing
functions (transcoding, echo cancellation, jitter managing), tones
processing and management of information transport.
Trunking gateways: interface between the PSTN/PLMN and VoIP
Residential gateway: provide traditional analog (RJ11) interface to VoIP
Access gateway: provide traditional analog or PBX interface to VoIP
Signaling network: provide change of signalization systems between
PSTN/PLMN to VoIP
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NGN Softswitch-Base ArchitectureComponents
Application
Server
Application server is implemented to perform functionalities specific
to certain service, perform specialized service logic call control, also
includes more functionalities in terms of user web interface, end-
points management, etc. For example it can provide specific
videoconferencing service, Call Center service or IP Centrex service.
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NGN Softswitch-Base ArchitectureComponents
Media
Server
Media server provides functionalities allow interaction between
calling party and application using end-point device. It provides
Media Resource Functions (tones detection, speech synthesis and
recognition, compressions, media mixing, etc.) and Media Control
Functions that control of media functions (voice message play
management, conference bridge, fax message management, etc.)
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NGN Configuration and Topology
INNI: Internal Network-Network Interface
NNI: Network-Network Interface
UNI: User Network Interface
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Conclusion
Other Architectures
• IMS and entities (P-CSCF, I-CSCF,…)
• TISPAN NGN
• GSM
• …
NGN Protocols
• SIP (Session Initiation Protocol)
• SDP (Session Description Protocol)
• RTP (Real Time Transport Protocol)
• ...
NGN Standards
Services and QoS
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Thank You
Any Question?
Havar Bathaee
University of Tehran