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Home > Real-time Mantra > IMS Call Flows > IMS Conference Call Flows
 IMS Conference Call Flow Diagrams

This sequence diagram shows an IMS user creating a conference by using a conference-factory URI. The conference is created at a MRFC-AS of the users home network. The steps involved in the conference scenario covered here are:
  • The conference initiator UE uses the conference factory URI to initiate a conference with the MRFC-AS (Multimedia Resource Function Control/Application Server).
  • The MRFC-AS assigns a conference URI to the conference and configures the MRFP (Multimeda Resource Function Processor).
  • The conference call is setup and the RTP data begins flowing between the conference initiating UE and the MRFP.
  • The conference initiator then uses the refer procedure to add more users to the conference. The new users establish a call to the conference URI passed in the refer message.
  • When the conference is in progress, RTP media streams are being mixed and propagated to all the participants.
  • The conference user drops out of the conference. All users are notified for this exit from the conference.

IMS Conference Call Flow pdf                                
IMS Conference Call Poster (11x17) pdf

The diagrams in this page were generated with EventStudio System Designer 4.0.
The source files for the diagrams can be downloaded from: ims-conference.zip

The call flow is explained below by focusing on a different aspects of the call flow.

Overview
The following diagram provides an overview of the message interactions. Interaction details and remarks are omitted from the diagram.

 IMS Conference Flow Overview pdf   

High Level Summary
The following flow diagram diagrams look at the conference call at a high level.

 Conference Call (IMS network is treated as a black box) pdf
 Conference Call (IMS network components are treated as black boxes) pdf

Conference Initiator User Equipment Role
Conference Initiating UE Role (Sequence Diagram) pdf
Conference Initiating UE Role (Collaboration Diagram) pdf

Conference Initiator S-CSCF Role
Conference Initiator S-CSCF Role (Sequence Diagram) pdf
Conference Initiator S-CSCF Role (Collaboration Diagram) pdf

Multimedia Resource Function (MRF) Role

Multimedia Resource Function Controller Role (Sequence Diagram) pdf
Multimedia Resource Function Controller Role (Collaboration Diagram) pdf
 Multimedia Resource Function Processor Role (Sequence Diagram) pdf
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