CSFB信令流程

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Index	Device	Time	Events	Direction	Signaling
1	UE1	07:14.7	ATE ITEM BEGIN
2	UE1	07:15.0	FTP control msg
3	UE1	07:15.0	FTP error
4	UE1	07:15.0	FTP server logon failed
5	UE1	07:15.0	ATE ITEM END
6	UE1	07:18.7		Up	Extended Service Request
7	UE1	07:18.7	CSFB MO start
8	UE1	07:18.7		Up	RRCConnectionRequest
9	UE1	07:18.7	Prach: Msg1 (RA)
10	UE1	07:18.7	Prach: Msg2 (RAR)
11	UE1	07:18.7	Prach: Msg3 (UE ID)
12	UE1	07:18.7	Prach: Msg4
13	UE1	07:18.7	Random access success
14	UE1	07:18.7		Down	RRCConnectionSetup
15	UE1	07:18.7		Up	RRCConnectionSetupComplete
16	UE1	07:18.7	RRC setup success
17	UE1	07:18.8		Down	RRCConnectionRelease
18	UE1	07:18.8	RRC release
19	UE1	07:18.8	IRAT L->G redirect start
20	UE1	07:19.4		Down	System Information Type 3
21	UE1	07:19.6		Down	System Information Type 4
22	UE1	07:19.6		Down	Paging Request Type 1
23	UE1	07:19.9		Down	System Information Type 1
24	UE1	07:20.1		Down	System Information Type 2
25	UE1	07:20.1		Down	Paging Request Type 1