Transcript Traditional Networks

MATERI KULIAH 6
SP 2005
PENJASTEL
Next Generation
Networks
( NGN )
Adapted from PT. INTI internal
documents for teaching purposes
Next-G networks: Definitions
Realization of Convergence of the
telecommunication networks
 Using Distributed Control Architecture
instead of Traditional common control
architecture

Traditional Networks
Separated Networks
SS7
Network
IMT
IMT
CL5 Switch
CL5 Switch
PSTN
CL4 Switch
PRI
C4 Switch
Corp PBX
CL5 Switch
MSC
PSTN
CL5 Switch
ISP RAS
ISP RAS
ISP

Internet
ISP
Traditional Networks: Separated Networks
– Distinct services: voice, mobile, data
– Different equipment for different services
– Different regulations
Traditional Networks
Access
Switch
DLC
Central Office Switch
PSTN

Separated Networks
Point of Presence
PSPDN
PSTN uses a circuit-switched network to carry voice
– Proven, reliable, QoS, feature rich, intelligence is in network

PSPDN uses a packet-switched network to carry data
– Open interfaces, flexible bandwidth, lower costs, intelligence
is in CPE
Traditional Networks

Problems
This situation is expensive and inefficient:
– Many solutions are proprietary
– Many resources are duplicated and cannot be shared
– Separate management system for each network

The future belongs to data networks but the
money is in voice! The Data Network expands,
but voice is still the main revenue-generator
Data: Superior “Traffic Volume”
Total Average Bit rate (Gbit/s)
150000
100000
50000
0
1990
1995
2000
2005
Data network traffic
2010
2015
2020
PSTN traffic
Source: Siemens
Voice: Key “Revenue Generator”
Operator Revenues (billion DM )
20 %
29 %
334
406
976
1002
994
1993
1998
2003
244
Non-Voice
Voice
25 %
Source: Siemens
Definition
Convergence Network
End Office
Switch
End Office
Switch
Corporate
Network
IMT
Internet
IMT
PRI
PRI
ISP RAS
ATM
Convergence
Switch
PSTN
Convergence
Switch
Corp PBX
ATM Core
IAD

The next-generation network seamlessly blends the
public switched telephone network (PSTN) and the
public switched packet data network (PSPDN),
creating a single multi-service network. This is
called convergence
Missing Link
Convergence
Multimedia Service
Platform
Feature Rich
Flexible bandwidth
QoS
OpenI I/F
Reliable
Lower costs
Proven
Voice
Networks
Switch

Intelligence
is in network
Switch
Intelligence
is in CPE
Data
Networks
Switch
To fill the missing link between voice & data networks, you
need wirespeed, cost efficient mediation devices at the
junction points of networks, controlled by centralized
...
intelligence of a powerful call and feature server
Distributed Control Architecture
IP TDM
ATM
Intelligence

Intelligence
Old Architecture:
– Larger
– Centralized (common)
– Expensive
– Proprietary

New Architecture:
– Smaller
– Distributed
– Cheaper
– Open
Distributed Control Architecture
Common Control Architecture
– Proprietary H/W and S/W
– Wait for generic S/W release to
launch application/services
– Long application development
time
Open Distributed Architecture
IP TDM
ATM
– More applications, more revenues
– Service creation at network edge,
close to the customer
– Lower cost, faster application
development
APIs for 3rd party
app development
Central Service Server
Call Server
Control Signal
to SS7 GW
Core Network GW
(SS7 Network)
Gateway
Control Signal
to Internet GW
Interconnect GW
to the Internet
Packet Network
IP or IP over ATM
Access GW
Mobile
Phone
WAP
CATV
CATV AN
Fixed
PSTN
Voice-data Int access
Access Layer
OSS
Transport &
Connectivity
Layer
App Server
Softswitch
Service & Control
Layer
ITU Layer Model of Next-G Network
Circuit-switch vs. Softswitch
The Softswitch will play a strategic role in the next-generation public
network infrastructure for voice, video and data communications
Circuit-Switched
P
R
O
P
R
I
E
T
A
R
Y
Services &
Applications
Soft-Switched
Services, Applications & Features
(Management, Provisioning and
Back Office)
Call Control &
Switching
Open
Transport
Hardware
Open
Protocols
APIs
Softswitch Call Control
Softswitch Objectives
 Flexible distribution of switching functionality
 Interoperability among functional elements
 Carrier selection of best-in-class components
 Rapid introduction of innovative new services
Protocols
APIs
Transport Hardware