Schedule: Timing Topic - Oracle€¦ · Online Mediation Controller 4 - 1 Schedule: Timing Topic minutes Lecture minutes Practice minutes Total

Online Mediation Controller 4 - 1

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The diagram illustrates Online Mediation Controller, acting as an Online Charging Function

(OCF), managing Diameter based charging events and responses in an IMS network.

Diameter messages coming from network elements, like:

• a Gateway GPRS Support Node (GGSN)

• an IMS Call Session Control Function (CSCF)

• an Application Function (AF)

are mediated to either:

• a third party Online Charging System (OCS)

or:

• an Oracle Billing and Revenue Management system (BRM) using the optimized Portal

Communications Protocol (PCP)


Explanations

• OE stands for Orchestration Engine.

• IM stands for Interworking Module

• R-IM stands for Reversed Interworking Module and refers to Interworking Modules that

communicates with network elements.

• SM stands for Supplementary Module.

• PME stands for Parameter Mapping Engine.

• SM-PME is a flexible XML-based engine that manipulates parameters in the headers and

body of internal messages.

• Gateway GPRS Support Node (GGSN) is a General Packet Radio Service (GPRS)

solution that enable mobile wireless operators to provide packet data service to their

mobile subscribers.

• Session and Event based charging:

- Event Charging with Unit Reservation (ECUR) and Session Charging with Unit

Reservation (SCUR) charging events are session-based involving interrogations to

reserve units and report actual used units.

- Immediate Event Charging (IEC) is used for credit authorization and direct debiting.

This is a one-time event, a single transaction that performs a debit, in which no

session state is maintained.

Highly Extensible

All solutions built on top of Online Mediation Controller are highly extensible since you can:

• Configure the OE to conditionally route messages differently depending of type and

content. This includes involving an external application that may run in an external

application server.

• Use SM-PME to modify the data in the message

• Build internal applications that can do anything possible in Java and SIP


As the diagram shows, the Online Mediation Controller can be configured to use the RADIUS

interface for communication with a Network Access Server (NAS).

From the standpoint of the BRM system, the Online Mediation Controller looks like an IMS

Offline Charging Function (OFCF) and communicates over Portal Communications Protocol

(PCP).

Supported authentication methods include:

• MD5, TLS and TTLS which all are part of the Extensible Authentication Protocol.

• Challenge Handshake Authentication Protocol (CHAP) method which uses an

incrementally changing identifier and a variable challenge-value.

• Password Authentication Protocol (PAP) which is the weakest of supported

authentication methods and is using a simple password authorization.

The diagram illustrates Online Mediation Controller and Service Controller managing SIP based

charging events and responses in an IMS network. In this example the Service Controller looks

like an Application Server to the IMS network. Therefore an IMS Media Resource Function

(MRF) can be used to interact with users pre, mid and post session announcements, over SIP.


The diagram indicates that Online Mediation Controller can give an Intelligent Networks

(IN) access to Oracle Communications Billing and Revenue Management (BRM). A

Mobile Switching Center (MSC) might send a request through Wireless Intelligent

Network (WIN) to BRM via Online Mediation Controller. In another scenario a Service

Control Point (SCP) might be connected to a Service Switching Point (SSP) which

communicates over Intelligent Network Application Part (INAP) and through Online

Mediation Controller to BRM.

SCPs may also communicate with an intelligent peripheral (IP) or Specialized Resource

Function (SRF) to play voice messages, or prompt for information to the user, such as

prepaid long distance using account codes. Online Mediation Controller supports these

same interactions.

The supported services, for both session and event based charging, are: • GPRS

• Voice calls

• SMS


The diagram gives examples of some of the interactions Online Mediation Controller integrated with Service Controller has with applications and networks.

Application facing Interworking Modules: IM-OCF - Online Charging Function interworking module

IM-OFCF - Offline Charging Function interworking module

IM-SSF - Service Switching Function interworking module

IM-WS – Web Services interworking module (both application and network facing )

Network facing Interworking Modules: R –IM-OCF – Reverse Online Charging Function interworking module

R –IM-OFCF – Reverse Offline Charging Function interworking module

IM-SCF - Service Control Function interworking module

IM-WS – Web Services interworking module (both application and network facing )

Network domain and application facing components: BI – Business Intelligence application

SMSC – Short message service center

CTF - Charging Trigger Function

NAS - Network Access Server

SSP -Service Switching Point

MSC - Mobile Switching Center



Explanations • Backhaul – In a hierarchical telecommunications network the backhaul portion of the

network comprises the intermediate links between the core network, or backbone, of the

network and the small subnetworks at the "edge" of the entire hierarchical network.

• UMTS stands for Universal Mobile Telecommunications System which is often referred

to as the third generation mobile technology or 3G.


Applications: OCCAS – Oracle Communications Converged Application Server

Protocols: WIN – Wireless Intelligent Network

CAMEL(CAP) – mobile variant of INAP. CAMEL is a means of adding intelligent applications to mobile

networks.

SIP – Session Initiation Protocol

Network components: MSC – Mobile Switching Center

PDSN – A packet data serving node is a required component in every 3G CDMA 2000 data network..

GGSN – Gateway GPRS Support Node.

CSCF – Call Session Control Function

AAA – Authentication, Authorization, Accounting: A function of Diameter which is part of the IMS

standard.

Networks: CDMA – Code Division Multiple Access

UMTS – Universal Mobile Telecommunications System: often referred to as the third generation mobile

technology or 3G.

IMS – IP Multimedia Subsystem

ISP – Internet Service Provider




Answer: a, c, d, e



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Schedule: Timing Topic - Oracle€¦ · Online Mediation Controller 4 - 1 Schedule: Timing Topic minutes Lecture minutes Practice minutes Total