Intelligent Networks

1
Intelligent Networks

• Park Jung Wan
• (jwpark77_at_kaist.ac.kr)
• Kang Tai Hun
• (thkang_at_cnr.kaist.ac.kr)

lt Telephone Internet Telephony Networks gt
2
Contents

• Introduction
• Related standard
• Operation procedure
• Technical issues
• The method of performance evaluations of the
  systems
• Others

3
Introduction

• System which is attractive to subscriber and
  create new earnings can be introduced quickly?
• Smallest change of network?
• Adaptive System to subscribers taste which is
  changed?

• Specification have started from early in 1990
• Wired communication network is first adapted
• Introduction in Korea
• - KT?SST?SKT?KTF?HST?LGT

SC

• There is no solution, because network is composed
  of MSC which is difficult to be changed quickly
• Survival solution in extreme competition
  circumstance is quick and adaptive service to
  subscriber
• Service network delivered easily is needed

Intelligent Network
BTS
TCP/IP
MS
HLR
SMP
TCP/IP
STP
No.7
No.7
SCP
BSC
MSC
No.7
No.7/ISUP
No.7/ISUP
IP
Intelligent Network Introduction!
SSP
SMP Service Management Point SCP Service
Control Point IP Intelligent Peripheral SC
Subscriber Center BTS Base station Transceiver
Subsystem BSC Base Station Controller STP
Signal Transfer Point HLR Home Location
Register SSP Service Switching Point MSC
Main Switching Center MS Mobile Station
ISUP ISDN User Part
4
Related Standard (1)

• IN Standard History

Europe
SMG GSM MAP
UMTS CAMEL
NA6 INAP
CTM INAP
ITU-T
SG 11/6 IN CS-1
IN CS-2
IN CS-3
SG 11/8 FPLMTS
North America
SG 11/6 IN CS-1
ANSI IN Phase 1
ANSI IN Phase x
SG 11/8 IS-41
WIN Phase 1
WIN Phase x
Cellular
PCS/PCN
3G
GSM Global System for Mobile communication
MAP Mobile Application Part Intelligent
Network Application Protocol CS Capability Set
UMTS Universal Mobile Telecommunication
System IN Intelligent Network ANSI American
National Standard Institute IS International
Standard FPLMTS Future Public Land Mobile
Telecommunication System WIN Wireless
Intelligent Network PCS Personal
Communication Service CAMEL Customized
Applications for Mobile network Enhanced Logic
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Related Standard (2)

• Dual Stack Architecture

• Adapted IN Standard

ITU-T WIN CAMEL
IN CS-1 (Q. 121x) IN CS-2 (Q. 122x) Phase 1 TIA/EIA/IS-771 TIA/EIA/IS-826, IS-848 Release 1999 Phase 3 3G TS 22.078, 23.078, 29.078
PDSN Packet Data Serving Node AAA
Authentication Authorization Accounting SMSC
Short Message Service Center SGSN Serving GPRS
Support Node GGSN Gateway GPRS Support Node
IMX IMT2000 Mobile Exchange CA CAMEL
Application Part
6
Operation Procedure (1)

• IN Service Registration

Creation of subscriber information in HLR,
SMP(SCP) DB
(2)
(4)
(1)
SMP
SC
(2)
SCP
Service registration request
HLR

• MS Location Registration

Location of MS is registration in HLR and
Intelligent Service Information of subscriber is
delivered from HLR to VLR
(1)
(2)
HLR
MSC/VLR
BTS
BSC
STP
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Operation Procedure (2)

• IN Service Origination

for example ) Prepaid voice call origination
MSC/SSP
Origination MS
Triggering and Event report
Call control command
Resource control command
SCP
Announcement Delivering and connection release
to gather DTMF
Command achievement result
Termination MS
MSC
IP
(1) Call of prepaid subscriber is triggering to
SCP (2) SCP authenticates intelligent
subscriber (3) Deliver announcement prepaid
remainder to MS (4) SCP commands progressing
call routing to termination MSC will page
connect to termination MS (5) If MS requests to
release call, MSC reports call release to SCP
(6) SCP account and update DB (charge deduction
in prepaid remainder for this call)
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Technical issues

• Security issue
• Evolution toward IP network
• Cost effective
• Flexibility
• Security problem
• easy to access system

• Load balancing issue
• SCP A not available
• ?
• SCP B single SCP
• Dual SCP (active active)
• DB sync.

No. 7
IP
SCP A
SCP B
DB
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The method of performance evaluations of the
systems

• Performance evaluation of AIN (Advanced
  Intelligent Networks) supporting mobile
  communications
• (Y.W Chung, M.Y Chung, Y,H Kwon, and D.K
  Sung, IEEE, 1997)
• AIN architectures supporting mobile communication
• Functional reference model
• AIN architecture scenario
• Signaling procedures
• Performance evaluation
• Signaling load
• Processing load
• Processing delay

10
AIN architectures supporting mobile communication
(1)

• Functional reference model
• Functional (logical) entity

11
AIN architectures supporting mobile communication
(2)

• AIN architecture scenario
• Functional (logical) entity ? physical entity
• Comparison of network architectures

12
Signaling procedures

• Mobility related
• Location update (Intra-SSP, Inter-SSP)
• Handoff (Intra-BSC, Inter-BSC, Inter-SSP)
• Call related
• Call origination
• Call termination
• Call release
• UPT outgoing and incoming calls

13
Performance evaluation (1)

• Signaling load
• Comparison of signaling load on various links
  (messages / sec)

14
Performance evaluation (2)

• Processing load
• Comparison of processing load on various physical
  entities (messages / sec)

15
Performance evaluation (3)

• Processing delay
• Assumption
• Each functional entity is simply modeled by an
  M/M/1 queueing model.
• The propagation delay on each signaling link is
  ignored.

• Processing delay in the case of intra-SSP
  location update

Network 1,3,5
Network 2,4
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Others OSA (Open Service Architecture) / Parlay
(1)

• Current problem Deploying new Service

• Improving way using SDP

• Each new service accesses systems in its own way
• It makes systems complex and spends high cost
  much time
• Especially, if MA occurs, this architecture
  gives much load to operator

• Each new service accesses systems in a standard
  way
• Systems are connected into standard SDP
• System can be changed without affecting services
  that use the system
• Time Cost Effective !!

• SDP
• Introduction

SDP Service Delivery Platform
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Others OSA / Parlay (2)

• OSA/Parlay is the common term used to refer to an
  industry-standard that underpins many SDPs now in
  development.
• The OSA/Parlay standard defines an API that aids
  the rapid creation of telecommunications services
  by enabling IT application developers to create
  telecom services

The Parlay APIs What do they offer?
Call Control User Interaction Mobility Availability management and presence
Policy management Terminal Messaging Content based Charging
General Common Data Definitions Framework Data Session Control
Account Management Connectivity Management
API Application Programming Interface