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Intelligent Networks
Contents 1. Introduction 2. IN Architecture Architecture 3. IN Call Flow 4. IN Services Examples
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Contents
1. Introduction 2. IN Architecture 3. IN Call Flow 4. IN Services Examples
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Introduction
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What does IN mean?
•
What is the purpose of the IN?
•
How did IN evolve?
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What does IN mean? The term “Intelligent Network” means a network capable of meeting market demands for new services in a flexible and cost effective way.
POTS Layer
IN Service Layer
(Plain Old Telephone Service)
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What is the purpose of the IN?
Fast Introduction of new services to the market
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How did IN evolve?
New Service
Service Deployment Service Design Service Specification
Service Analysis 7/13
Contents 1. Introduction
2. IN Architecture 3. IN Call Flow 4. IN Services Examples
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Introduction SDP (Service Data Point)
INAP, CS1+
CCN (Charging Control Node)
INAP,CAP
HLR
MSCs/SSF
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Introduction [Cont’d]
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SDP (Service Data Point): •Holds the subscribers data base
•
CCN (Charging Control Node): •Holds the service logic
•
MSCs (SSF- Service Switching Function): •Controls the IN
triggering
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Contents 1. Introduction 2. IN Architecture
3. IN Call Flow 4. IN Services Examples
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Originating Charged Call (CS1+)
1. The call is initiated from the subscriber. The OICK of the subscriber in the VLR routes the call to the SSF. 2. The SSF collects data about the call and triggers the CCN. 3. The data collected in Step 2 is sent in a First Interrogation to the SDP where the Service Scenario of the account is checked and a preliminary Charging Analysis takes place. Number Lists are also checked at this stage. Optionally, CCN performs an MNP lookup
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Originating Charged Call (CS1+) ( cont.)
4.The SDP reserves money from the account and sends the calculated call time together with other call data such as announcements to be played to the CCN. 5.The CCN orders the SSF to play announcements if this has been requested by the SDP. Further on the CCN orders the SSF to setup the call and to supervise it based on the call time calculated by the SDP.
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Originating Charged Call (CS1+) ( cont.)
6. If the call lasts longer than the call time sent to the SSF, the SSF notifies the CCN. 7. The CCN requests the SDP to make another reservation from the account with an Intermediate Interrogation. 8. The SDP will make a new Charging Analysis and update the account. If there is still money left on the subscriber’s account the SDP
will send down a new call time to the CCN.
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Originating Charged Call (CS1+) ( cont.)
9. The CCN passes the new call time on to the SSF. Note: Step 6 to 9 can be repeated several times. In this example steps 10-17 describes what happens when the money on the subscriber’s account
will reach the account empty limit. 10.The call lasts longer than the call time sent to the SSF and the SSF notifies the CCN. 15/13
Originating Charged Call (CS1+) ( cont.) 11.
The CCN requests the SDP to make another reservation from the account with an Intermediate Interrogation.
12.
SDP makes a new charging analysis and updates the account. The charging analysis shows that there is not enough money on the account to cover the requested period. SDP sends the calculated call time to CCN together with an indication that there is no money left on the account and that a call cutoff warning announcement is to be played. The time between the warning announcement and call cutoff can be configured. For this example 30 seconds is used.
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Originating Charged Call (CS1+) ( cont.)
13. CCN uses the 30 seconds indication from SDP and the time between call cutoff warning and call cutoff is excluded from the new call time. CCN then passes the new call time on to the SSF. 14.The SSF notifies the CCN that the time sent down in step 13 has expired. 15.The CCN sends down the remaining 30 seconds and orders the SSF to play the call cut off warning announcement.
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Originating Charged Call (CS1+) ( cont.)
16.The SSF notifies the CCN that the final 30 seconds has expired. 17.The CCN orders the SSF to play the call cut off announcement and to thereafter disconnect the call. 18. The SSF notifies the CCN of the call disconnection. 19. A Final Report is sent from the CCN to the SDP. It contains the total duration of the call as well as the duration for the last period used. The SDP performs final charging of the call.
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Originating Charged Call (CS1+) ( cont.)
20.The SDP sends a final report reply back to the CCN.
21.The CCN sends a call release to the MSC/SSF.
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Contents 1. Introduction 2. IN Architecture 3. IN Call Flow
4. IN Services Examples
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IN services examples
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Pre-paid service
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VPN (Virtual Private Network)
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IN services examples [Cont’d] Pre-paid service
Call to 868, 858
IVR
AIR
VS
SDP Rating Accounts
Traffic Call
MSC
CCN
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VPN Introduction
“ A VPN is a telecommunications service that works as a private network, but that makes use of the existing public telecom infrastructure. “
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