A.3 Deactivation for non-supporting MSs

24.0933GPPCompletion of Calls to Busy Subscriber (CCBS)Release 17Stage 3TS

MS A shall send a REGISTER message to the network, with the Facility information element, indicating ProcessUnstructuredSS-Request. Different MMI is required (as specified in 3GPP TS 22.030) for the three different deactivation operations, although each deactivation operation uses the USSD mechanism to transport the information to the network.

MS A NETWORK
REGISTER
——————————————————————————————————————————–>
Facility (Invoke = ProcessUnstructuredSS-Request (ussd-DataCodingScheme, ussd-String))

RELEASE COMPLETE
<——————————————————————————————————————————–
Facility (Return Result = ProcessUnstructuredSS-Request (ussd-DataCodingScheme, ussd-String))

RELEASE COMPLETE
<- – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Facility (Return Error (Error))

RELEASE COMPLETE
<- – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Facility (Reject (Invoke_Problem))

Figure A.3: Deactivation of all CCBS requests, the last or a single CCBS Request for non supporting MSs