The Intelligent Network

“The IN is a cash register.” --RZ

What is IN? The Intelligent Network (IN) is an “additional

network” built on the basis of the existing telecom network, which creates new services rapidly, effectively, flexibly and cost-effectively.

In Sun Cellular, the IN is in charge of all prepaid-related services

DMPI IN History 2003 – 2006 Alcatel IN August 2006 upto present – Huawei IN

Main Idea of IN

Intelligent layer

Signaling network

Switch & Transmission layer

SS7

TCP/IP IN separates service control function

from switching function

The newly introduced

network

The existing network

Why IN? Efficient use of high-developed technologies Use of existing resources efficiently Modularization and reusability of IN functions Flexible allocation of IN network functions Standardized management of service logic Controls subscriber-specified service

attributes Controls user-specified service attributes

IN Architecture

SS7

SSP/IP

SCP

SMP

SMAP

SCETCP/IP

SSP/IP

SAU

MML API

VC

EVC

Main IN Functional Entities Service Switching Point (SSP) – responsible for

detecting special conditions during call processing that cause a query for instructions to be issued to the SCP.

Service Control & Data Unit (SCDU) Service Control Point (SCP) – stores the service

provider instructions and data that direct switch processing & provide call control.

Service Data Point (SDP) – stores IN subscriber data. Service Management Point (SMP) – performs

activities involved with service deployment, provisioning, control, monitoring & billing.

Other IN Elements Advanced Intelligent Peripheral (AIP) – houses

the Interactive Voice Response (IVR) Record Billing Interface (RBI) – contains CDRs

for billing & validation purposes. Voucher Center (VC) – stores scratch cards. Electronic Voucher Center (EVC) – special

wallet for Expressload (applies to Sun Cellular IN).

EVPN (Enhanced Virtual Private Network) GDR (Geographical Disaster Recovery)

IN SpecificationsCAPACITIES: SCP – Currently we have 8 SCPs which can accommodate

21M subscribers EVC – 2M subscribers EVPN – 500k subscribers VC – 33M

LOCATION: Libis Pioneer RPR

Functions and Capabilities

CALL SUPERVISIONThe PPS service supervises calls according to the following: Checks to ensure the minimum credit is available to

make a call (i.e. if the credit is sufficient to establish a call according to the tariff). If not, the subscriber receives a fault announcement.

Real time supervision. The remaining credit is checked in real time during a call. The call is disconnected if the credit limit is reached

Functions and Capabilities

ACCOUNT PROFILEThe PPS service is based on a profile concept. This

enables the Service Provider to define a service adapted to specific market segments.

Each prepaid account has an account profile. The account profile contains parameters which are automatically set in the account at its creation and used at activation. These parameters are the default language, initial credit andactivity and inactivity durations. The account profile also contains information on the tariff scheme, warning thresholds and parameters for the handling of short messages and announcements. The account profile contains specificinformation for the screening and charging of fax/data calls.

Account profiles must be defined before any accounts are created.

Functions and Capabilities

SCRATCHCARDS

To refill their account using a scratch card bought from a retailer, the subscriber calls a special Voice access code from their mobile or third party phone, selects the option to recharge and enters the refill code found on the card after scratching. The amount on the card is transferred to the subscribers account and the active/inactive durations linked to the card are taken into account.

Subscriber can also refill/rechare their account by dialing a USSD access code together with the scratchcard pin.

Functions and CapabilitiesSCRATCH CARD PROFILE

The scratch card profile contains the characteristics of the scratch cards that belong to the same profile, i.e. credit amount, active/inactive durations of the refill and bonus amounts.

ACCOUNT LIFECYCLE

A Digitel Prepaid account moves through a series of lifecycle states starting with the production of a SIM card until the card is purged from the system.

Functions and CapabilitiesCHARGING PRINCIPLES

The charging of calls is based on the following criteria:

the rate plan — associated with the Account Profile and Account object. Characterises the pricing policy applied to one or more accounts.

the rate code — according to the time of day and day of call.

the charging class — according to the origin and the destination of the call.

the call duration

IN Features, Products & Services

Call Flow (SMS – MO)

SCP/USAU MSCSMSCMobile Phone

Charge Request

Charge Request

Charge Request Response

SMS

SMS

SMS to called number

IN-SMSCProtocol: CAP1Charge Request Parameter: msisdn, called number

Call Flow (MO – Call)

IN/USAU MSC

IDP

RRBE

AC

Continue

AC_R

ERB

Release Call

Description:IDP – Initial Detection PointRRBE – Request Report BCSM EventAC – Apply ChargingACR – Apply Charging ReportERB- Event Report BCSM

USAU - MSCProtocol: CAP2IDP Parameter: calling number, called number, location number, cell id