Transcript Next-G Switch - GEOCITIES.ws

NEXT
GENERATION
NETWORK
1
Next-G networks: Definitions
• Realization of Convergence of the
telecommunication networks
• Using Distributed Control
Architecture instead of Traditional
common control architecture
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Separated Networks
Traditional Networks
SS7
Network
CL5 Switch
IMT
IMT
PSTN
CL5 Switch
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
3
Separated Networks
Traditional Networks
Access
Switch
DLC
Central Office Switch
PSTN
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,
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intelligence is in CPE
Problems
Traditional Networks
• 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
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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 6
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 7
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
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Convergence
Multimedia Service
Platform
Feature Rich
Missing Link
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 wire-speed, cost efficient
mediation devices at the junction points of
...
networks, controlled by centralized intelligence
of a
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powerful call and feature server
Distributed Control Architecture
IP TDM
ATM
Intelligence
• Old Architecture:
– Larger
– Centralized
(common)
– Expensive
– Proprietary
Intelligence
• New Architecture:
– Smaller
– Distributed
– Cheaper
– Open
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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
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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
Layer Model of Next-G Network
ITU
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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
Protocols
APIs
Transport Hardware
Softswitch Objectives
•
•
•
•
Flexible distribution of switching functionality
Interoperability among functional elements
Carrier selection of best-in-class components
Rapid introduction of innovative new services
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Next-G Switch: General
Characteristics
•
•
•
•
Extreme Scalability
Service Creation Environment
Remote Management and Diagnostics
High Availability
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Extreme Scalability
Network Level
System Level
Card Level
Card Level
SNMP
• Hardware & software scales to meet the demands of
any network deployment
– Purchase only the capacity that the network
requires
– For additional capacity, insert additional cards
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Service Creation Environment
• Allow carriers to develop,
deploy and pay only for the
services that their customers
require
– No longer need to wait for
a vendor’s next release of
feature software
• Gives a competitive advantage to the carrier
– Competitors may not be able to offer the same
service
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Remote Management &
Diagnostics
• Connect a
distributed network
of intelligent
switches together
and manage them
as a single virtual
switch
• Graphical User Interface (GUI) for
easier management
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Highest Availability
• Hot-swappable, fault-tolerant system
– Switch does not have to be brought
down for hardware upgrades
– New software can be uploaded and
activated while the switch is in service
• Zero downtime
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Vendor Solutions: Siemens
SURPASS
SURPASS
SURPASS hiQ
NetManager
Switch
Remote
Switch
Remote
Switch
Circuit-Switched
Network
Packet-Switched
Network
SURPASS hiG
SURPASS hiA
...
...
Residential
Small-Medium Enterprise
Residential
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Vendor Solutions: ZTE
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Vendor Solutions: Huawei
Softswitch
iNET - Huawei NGN Solution
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Vendor Solutions: Alcatel
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Vendor Solutions: Ericsson
Telephony
Server
Telephony
Server
Q.BICC
H.248
H.248
ACCESS
NODE
AXD301
MEDIA
GATEWAY
LOCAL
EXCHANGE
PBX
AXD301
AXD301
CORE
SWITCH
ACCESS
NODE
LOCAL
EXCHANGE
MEDIA
GATEWAY
PBX
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Summary
• 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.
• Rather than large, centralized, proprietary switch
infrastructures, this next-generation architecture
pushes central-office (CO) functionality to the edge
of the network.
• The result is a distributed network infrastructure
that leverages new, open technologies to reduce the
cost of market entry dramatically, increase flexibility,
and accommodate both circuit-switched voice and
packet-switched data.
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