IMS Overview

IMS Overview Training

The IMS overview training provides general knowledge of the architectures, functions and protocols in the IP Multimedia Subsystem, IMS. In addition to this, the background and reasons for introducing IMS are detailed.

In terms of the technical content, the course commences by investigating IP, Internet Protocol as well as, and real-time media over IP in particular. Session Initiation Protocol, SIP is also described along with its use within IMS.

In order to understand how they are used, some IMS signalling flow traffic cases are investigated. Issues including quality of service, QoS and various service provisioning are discussed. The IMS overview course also outlines IMS role for fixed mobile convergence.

IMS Introduction with Network Overview

• Network architecture for service provisioning with IMS control: nodes and interfaces and protocols

• Types of IMS services

• Interworking with existing service platforms

Transport Networks

• Various IP-CANs: GERAN, UTRAN, UMA/GAN, E-UTRAN/LTE

IP-based information transfer

• IP stack introduction

• End-to-end transport over IP

• Client-server model

Real-time multimedia over IP using SIP

• Introduction of the SIP protocol

• SIP methods

• Session and Dialog

• SDP, RTP and RTCP

• Basic SIP traffic case

IMS Registration and Subscription

• IMS subscription

• Public and Private User Identities

• User profiles and Filter Criteria

• IMS registration

• Registration traffic case

• Roles of P-CSCF, I-CSCF, S-CSCF, SLF, HSS/UPSF and AS

IMS Invitation

• Invitation traffic case between two IMS users

• IMS and basic SIP cases comparison

• SDP offer/answer model

PSTN Interworking

• Interworking with PSTN

• Roles of BGCF, MGCF and IM-MGW

IMS Services

• Service provisioning in IMS

• Service invocation over ISC

• Service examples: Presence, Conferencing, Push to talk, Messaging

Quality of Service, QoS

• QoS overview

• Provision of QoS in IMS

• Role of PCRF, P-CSCF and S-CSCF for QoS

Charging

• IMS Charging principles

• Online and Offline charging

• Charging in association with roaming

Pre-Requisites:

To ensure that the maximum benefit can be gained from the IMS overview training course, a general knowledge of the architecture of telecommunications networks, mode of operation and terminologies is recommended.

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