1.
NGN
Next Generation Network
Concepts
Havar Bathaee
University of Tehran
December 7, 2014

2.
Agenda
 Introduction
 NGN Definition
 NGN Standardization
 NGN Conceptual Model
 Convergence Towards NGN
 NGN Softswitch-Base Architecture
 NGN Configuration and Topology
 Conclusion
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

3.
Introduction
PSTN
NGN
All-IP Network
INTERNET MOBILE
Others…
Today, telephony, the Internet, and the cellular mobile
networks continue to be different domains, each has its own
protocols and services.
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

4.
Introduction
General Idea
Packets
Voice
Data
Multimedia
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

5.
Introduction
History
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

6.
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.
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

7.
NGN Definition
Characteristics
 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
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

8.
NGN Standardization
Key Players
3GPP
ITU-T
ITU Telecommunication
Standardization Sector
ITU-T
NGN-GSI
ATIS
NGN FG ETSI
TISPAN
ATIS
Alliance for Telecom.
Industry
ETSI
European Telecom.
Standards Institute
3GPP
3rd Generation Partnership
Project
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

9.
NGN Standardization
Key Players (continued)
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

10.
NGN Standardization
Problems
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
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

11.
NGN Conceptual Model
NGN applications and
services, application
server, features server,
media server
MGC, Softswitch, Call
Agent, Gatekeeper
Transmission Packet
network, VOIP, Media
gateways, Signalling
gateway, Core Packet
network
Fixed, Data, Cable,
Wireless fixed, Mobile,
Satellite
Access to
NGN
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

12.
NGN Conceptual Model
Management layer
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 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
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

13.
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).
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

14.
Convergence towards NGN
Evolutional scenarios
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).
TDM
IP
NGN
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

15.
Convergence towards NGN
Evolutional scenarios (continued)
PSTN & Intelligent
Networks
Internet & Data
Networks
Cable Networks
Wireless & Mobile
Networks
Internet
Telephony
Hybrid
Networks
VoIP
Networks
VoCATV
GSM GPRS UMTS
NGN
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

16.
Convergence towards NGN
From Vertical Silos to Horizontal NGN Architecture
Application
Service
Control
Transport
Access
End Points
Mobile Networks
PSTN/ISDN
Data/IP Networks
Cable/Terrestrial TV
Vertical Silo Architecture
per service
Services
Horizontal Layered
Multi-Service Architecture
Existing and Newly Emerging
Services
Services & Network Control
(QoS, Security, IP Mobility)
Multi-Service IP Backbone
Wireless
Access
Wireline
Access
Services
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

17.
Convergence towards NGN
Comparing the Features of PSTN/IN, Internet, and 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
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

18.
NGN Softswitch-Base Architecture
Media
Application Server
Access
Network
PSTN /
IN
RTP
RTCP
VoIP
IP / MPLS
MGCP
H.323
SIP
Media
Gateway
Controller
TDM RTP/RTCP
Trunking
Gateway
(MGW)
Access
Gateway
Server
SIG
T
M
Signaling
Gateway
SIP
SIP
MGCP
H.248
MGCP
H.323
SIP
MGCP
H.248
Media Gateway Controller
SIP-T, BICC
AG
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

19.
NGN Softswitch-Base Architecture
Components
M
Media Gateway
Call Agent Softswitch
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.
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

20.
NGN Softswitch-Base Architecture
Components
T
Media Gateway
Trunking gateways: interface between the PSTN/PLMN and VoIP
Operate Residential within gateway: transport provide plane, traditional perform analog all function (RJ11) related interface to media
to VoIP
physical transport between different networks, media processing
functions Access gateway: (transcoding, provide echo traditional cancellation, analog or jitter PBX managing), interface to VoIP
tones
processing Signaling network: and management provide of change information of signalization transport.
systems between
PSTN/PLMN to VoIP
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

21.
NGN Softswitch-Base Architecture
Components
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.
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

22.
NGN Softswitch-Base Architecture
Components
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.)
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

23.
NGN Configuration and Topology
INNI: Internal Network-Network Interface
NNI: Network-Network Interface
UNI: User Network Interface
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

24.
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
Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

25.
Any Question?
Thank You
Havar Bathaee
University of Tehran