7.4.1 Functional requirements of serving MSC

23.0183GPPBasic call handlingRelease 15Technical realizationTS

7.4.1.1 Process Subs_FSM

One instance of the process Subs_FSM runs for each subscriber who is involved in at least one call. It monitors the state of any ongoing calls for that subscriber. The individual call control processes OCH_MSC and ICH_MSC submit supplementary service requests received from the MS to the process Subs_FSM, which then responds appropriately.

The process Subs_FSM interacts with the processes OCH_MSC and ICH_MSC as specified in subclauses 7.1.1 and 7.3.1.

Sheet 5, sheet 6, sheet 7, sheet 8, sheet 9, sheet 11, sheet 12, sheet 15: processing on this page will occur only if the VMSC supports HOLD.

Sheet 8: the procdure Handle_MPTY is specific to MPTY; it is specified in 3GPP TS 23.084 [17].

Sheet 8: the procedure Handle_ECT_Active is specific to ECT; it is specified in 3GPP TS 23.091 [22].

Sheet 10: processing on this page will occur only if the VMSC supports Multicall.

Sheet 12: the procedure Handle_ECT_Alerting is specific to ECT; it is specified in 3GPP TS 23.091 [22].

Sheet 13, sheet 14: processing on this page will occur only if the VMSC supports both HOLD and Multicall.

7.4.1.1.1 Macro Check_Ongoing_Calls
7.4.1.1.2 Macro Update_Non_Speech_Calls_Status
7.4.1.1.3 Macro Increment_Call_Counter
7.4.1.1.4 Macro Decrement_Call_Counter

Figure 83a: Process Subs_FSM (sheet 1)

Figure 83b: Process Subs_FSM (sheet 2)

Figure 83c: Process Subs_FSM (sheet 3)

Figure 83d: Process Subs_FSM (sheet 4)

Figure 83e: Process Subs_FSM (sheet 5)

Figure 83f: Process Subs_FSM (sheet 6)

Figure 83g: Process Subs_FSM (sheet 7)

Figure 83h: Process Subs_FSM (sheet 8)

Figure 83i: Process Subs_FSM (sheet 9)

Figure 83j: Process Subs_FSM (sheet 10)

Figure 83k: Process Subs_FSM (sheet 11)

Figure 84l: Process Subs_FSM (sheet 12)

Figure 84m: Process Subs_FSM (sheet 13)

Figure 84n: Process Subs_FSM (sheet 14)

Figure 84o: Process Subs_FSM (sheet 14)

Figure 84p: Process Subs_FSM (sheet 14)

Figure 84q: Process Subs_FSM (sheet 14)

Figure 84r: Process Subs_FSM (sheet 14)

Figure 85: Macro Check_Ongoing_Calls

Figure 86: Macro Update_Non_Speech_Calls_Status

Figure 87: Macro Increment_Call_Counter

Figure 88: Macro Decrement_Call_Counter