Content for TS 23.292 Word version: 18.0.0

1… 4… 5… 7… 7.2… 7.3… 7.3.2.2… 7.3.2.2.4… 7.4… 7.4.2.2… 7.4.2.2.3… 7.4.2.2.7… 7.5… 7.6… 7.6.1.2.2.6… 7.6.1.2.3… 7.6.1.2.3.5… 7.6.1.2.3.6… 7.6.2… 7.6.2.7 7.6.2.8… 7.6.2.11… 7.6.3… 7.7… 7.7.2… 7.9… 7.9.2… 7.9.2.4 7.9.2.5 8… A… G… H… H.5… H.5.3…

7.9.2.5 Addition/Removal of video media flow through redial using I1 Reference Point
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7.9.2.5 Addition/Removal of video media flow through redial using I1 Reference Point p. 112

Figure 7.9.2.5-1 describes how a video media flow is added to an ongoing speech session through redial for the ICS UE which is attached to the MSC Server enhanced for ICS over the I1 reference point. Change from multimedia (i.e. speech and video) to speech can be achieved in a similar way.

Copy of original 3GPP image for 3GPP TS 23.292, Fig. 7.9.2.5-1: Addition of video media flow for ICS UE via the MSC Server enhanced for ICS through redial using I1 reference point

Figure 7.9.2.5-1: Addition of video media flow for ICS UE via the MSC Server enhanced for ICS through redial using I1 reference point
(⇒ copy of original 3GPP image)

Step 1.

The ICS UE A sends a Call MODIFY message that offers the adding of the video media to the ongoing speech session to the SCC AS.

Step 2.

The SCC AS sends a Call MODIFY Response message to the ICS UE A.

Step 3.

The ICS UE A sends a CS call disconnect message to the MSC server to release the existing CS access leg.

Step 4.

The MSC server sends the BYE message to the S-CSCF.

Step 5.

The S-CSCF forwards the BYE message to the SCC AS.

Step 6.

Completion of the CS access leg release procedure.

Step 7.

The ICS UE A sends a CS call setup message to the MSC server to establish a new CS access leg supporting video and speech media.

Step 8.

The MSC server sends the INVITE to the S-CSCF.

Step 9.

The S-CSCF sends the INVITE to the SCC AS.

Step 10.

The SCC AS sends a re-INVITE to the S-CSCF that offers the adding of the video media to the ongoing speech session to update the remote leg.

Step 11.

The S-CSCF sends the re-INVITE to UE B.

Step 12.

Completion of the session and bearer setup procedures, where upon the establishment of the multimedia connection, the MSC Server shall perform the video codec negotiation and set up the multimedia bearer based on the procedures defined in TS 29.163.

Figure 7.9.2.5-2 describes how a video media flow is added to an ongoing speech session through redial for the ICS UE which is attached to the MSC Server not enhanced for ICS over the I1 reference point. Change from multimedia (i.e. speech and video) to speech can be achieved in a similar way.

Copy of original 3GPP image for 3GPP TS 23.292, Fig. 7.9.2.5-2: Addition of video media flow for ICS UE via the MSC Server not enhanced for ICS through redial using I1 reference point

Figure 7.9.2.5-2: Addition of video media flow for ICS UE via the MSC Server not enhanced for ICS through redial using I1 reference point
(⇒ copy of original 3GPP image)

Step 1.

The ICS UE A sends a Call MODIFY message that offers the adding of the video media to the ongoing speech session to the SCC AS.

Step 2.

The SCC AS sends a Call MODIFY Response message to the ICS UE A.

Step 3.

The ICS UE A sends a CS call disconnect message to the MSC Server to release the existing CS access leg.

Step 4.

The MSC Server sends a REL message to the MGCF.

Step 5.

The MGCF sends a BYE message to the S-CSCF.

Step 6-8.

Steps 6-8 in Figure 7.9.2.5-2 are identical to Steps 5-7 in Figure 7.9.2.5-1.

Step 9.

The MSC Server sends an IAM message to the MGCF.

Step 10.

The MGCF sends the INVITE to the S-CSCF.

Step 11-13.

Steps 11-13 in Figure 7.9.2.5-2 are identical to Steps 9-11 in Figure 7.9.2.5-1.

Step 14.

Completion of the session and bearer setup procedures, where upon the establishment of the multimedia connection, the MGCF/IMS-MGW shall perform the procedures as specified in TS 29.163 to set up the multimedia bearer.