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Content for  TS 23.172  Word version:  18.0.0

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4.3.5.2 Unsuccessful Service Change 

 

4.3.5.2  Unsuccessful Service Change  p. 51

In the case the service change is denied by the UE at the terminating side, the procedures for the unsuccessful Codec Modification as defined in [2] shall be applied to revert to the old medium (speech or multimedia).
The through-connection of terminations shall be performed as described in Subclause 4.3.5.1. The "Codec Modification Failure" message shall interact with the "Modify Bearer Characteristics" procedure and the "Confirm Bearer Characteristics" procedure in the same way as the "Successful Codec Modification" message.
An example sequence is shown in Figure 4.3.5.2-1 to Figure 4.3.5.2-5.
Copy of original 3GPP image for 3GPP TS 23.172, Fig. 4.3.5.2-1:Service Change Rejected
Figure 4.3.5.2-1:Service Change Rejected
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.172, Fig. 4.3.5.2-2:Service Change Rejected (Continued)
Figure 4.3.5.2-2:Service Change Rejected (Continued)
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.172, Fig. 4.3.5.2-3: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user A
Figure 4.3.5.2-3: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user A
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.172, Fig. 4.3.5.2-4: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user B
Figure 4.3.5.2-4: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user B
(⇒ copy of original 3GPP image)
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Copy of original 3GPP image for 3GPP TS 23.172, Fig. 4.3.5.2-5: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user B (continued)
Figure 4.3.5.2-5: Network-initiated service change from speech to MuMe initiated by MSS A, rejected by user B (continued)
(⇒ copy of original 3GPP image)
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