13. MS BSS MSC VLR HLR PSTN 1 Equipment ID Request < SDCCH> 2 ID Response < SDCCH> IMEI) EIR Equipment Identification
14. MS BSS MSC VLR HLR PSTN 1 Equipment ID Request < SDCCH> 2 ID Response < SDCCH> IMEI) 3 Check IMEI Check IMEI Response EIR Equipment Identification
15. GSM Basic Call Sequence Mobile to Land Sequence Land to Mobile Sequence Mobile Initiated Call Clearing Sequence
16. GSM Basic Call Sequence The process for calling MS and called MS are two independent flow. The calling party begins with channel request and ends with TCH assignment competition. In general, the calling party includes following several stages: access process, authentication and ciphering process, TCH assignment process. So, we take the sequence from mobile to land as example, in this sequence, we mainly devote to the calling party.
17. Mobile to Land Sequence MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN SIGNALING LINK ESTABLISHED PSTN
18. MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC PSTN Mobile to Land Sequence
19. MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE PSTN Mobile to Land Sequence
20. MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE 4 SET-UP < SDCCH> Call Info PSTN SFOC Mobile to Land Sequence
21. MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE 4 SET-UP < SDCCH> Call Info 5 EQUIP. ID REQ. PSTN SFOC Mobile to Land Sequence
22. MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE 4 SET-UP < SDCCH> Call Info 5 EQUIP. ID REQ. 6 COMPLETE CALL CALL PROCEEDING < SDCCH> PSTN SFOC Mobile to Land Sequence
23. Mobile to Land Sequence 7 ASSIG. COMMAND < SDCCH> ASSIG. COMPLETE circuit < FACCH> MS BSS MSC VLR HLR PSTN
24. 7 ASSIG. COMMAND < SDCCH> ASSIG. COMPLETE Address Complete(ACM) Alerting circuit < FACCH> Initial and Final Address 8 Message (IFAM) MS hears ring tone from land phone < FACCH> MS BSS MSC VLR HLR PSTN Mobile to Land Sequence
25. 7 ASSIG. COMMAND < SDCCH> ASSIG. COMPLETE Address Complete(ACM) Alerting < FACCH> 9 Answer (ANS)Connect circuit < FACCH> Initial and Final Address 8 Message (IFAM) MS hears ring tone from land phone < FACCH> Ring tone stops MS BSS MSC VLR HLR PSTN Mobile to Land Sequence
26. 7 ASSIG. COMMAND < SDCCH> ASSIG. COMPLETE Address Complete(ACM) Alerting < FACCH> 9 Answer (ANS)Connect 10 Connect Acknowledge < FACCH> circuit < FACCH> < TCH> Initial and Final Address 8 Message (IFAM) MS hears ring tone from land phone < FACCH> Ring tone stops HELLO! MS BSS MSC VLR HLR PSTN BILLING STARTS Mobile to Land Sequence
28. Answer MS BSS MSC VLR HLR 1 CHANNEL REQUEST < RACH> < AGCH> DCCH ASSIGN < SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE 4 SET-UP < SDCCH> Call Info 5 EQUIP. ID REQ. 6 COMPLETE CALL CALL PROCEEDING < SDCCH> PSTN SFOC Call Barred
29. GSM Basic Call Sequence For the called party, the flow for the called party begins when MSC sends paging command to the called party, ends when two party start talk. In general, this call flow includes several stages: access process, authentication and ciphering process, TCH assignment process, talk process, release process.
30. Land to Mobile Sequence MS BSS MSC VLR HLR GMSC ( MSISDN) Initial and Final 1 Address Message PSTN
31. MS BSS MSC VLR HLR GMSC ( MSISDN) ( MSISDN) ( IMSI) Initial and Final 1 Address Message PSTN 2 Send Routing Info Land to Mobile Sequence
32. MS BSS MSC VLR HLR GMSC ( MSISDN) ( MSISDN) ( IMSI) ( MSRN) Initial and Final 1 Address Message PSTN ( MSRN) ( MSRN) 2 Send Routing Info 3 Routing Info Ack Initial and Final Address Message Land to Mobile Sequence
33. MS BSS MSC VLR HLR GMSC ( MSISDN) ( MSISDN) ( IMSI) ( MSRN) ( MSRN) Initial and Final 1 Address Message PSTN ( MSRN) ( MSRN) 2 Send Routing Info 3 Routing Info Ack Initial and Final Address Message 4 Send Info For I/C Call Setup Land to Mobile Sequence
34. MS BSS MSC VLR HLR GMSC ( MSISDN) ( MSISDN) ( IMSI) ( MSRN) ( MSRN) ( LAI & TMSI) ( TMSI) ( TMSI) Initial and Final 1 Address Message PSTN ( MSRN) ( MSRN) 2 Send Routing Info 3 Routing Info Ack Initial and Final Address Message 4 Send Info For I/C Call Setup 5 Page Paging Request < PCH> Land to Mobile Sequence
35. 6 Channel Request DCCH Assign Signaling Link Established Page Response *Authentication <RACH> <AGCH> <SDCCH> <SDCCH> (TMSI) (TMSI & Status) (Status) CR Land to Mobile Sequence MS BSS MSC VLR HLR GMSC PSTN
36. 6 Channel Request DCCH Assign Signaling Link Established Page Response *Authentication 7 Complete Call Setup <RACH> <AGCH> <SDCCH> <SDCCH> (TMSI) (TMSI & Status) (Status) < TMSI> <SDCCH> CR MS BSS MSC VLR HLR GMSC PSTN Land to Mobile Sequence
37. 6 Channel Request DCCH Assign Signaling Link Established Page Response *Authentication 7 Complete Call Setup 8 Call Confirmation <RACH> <AGCH> <SDCCH> <SDCCH> (TMSI) (TMSI & Status) (Status) < TMSI> <SDCCH> <SDCCH> CR MS BSS MSC VLR HLR GMSC PSTN Ring Tone at the land phone Land to Mobile Sequence
38. ( channel) ( circuit) < FACCH> 9 Assignment Command Assignment Complete Alert < TCH> Address Complete Land to Mobile Sequence MS BSS MSC VLR HLR GMSC PSTN Ring Tone at the land phone
39. < FACCH> ( channel) ( circuit) < FACCH> 9 Assignment Command Assignment Complete Alert < TCH> < FACCH> 10 Connect Connect ACK ANS < TCH> Hello... Address Complete MS BSS MSC VLR HLR GMSC PSTN Billing starts Ring Tone at the land phone Ringing stops at land phone Subscriber picks up Land to Mobile Sequence
40. Questions Please give the sequence: 1.The called MS is powered off. 2.The called MS activates the CFU to a PSTN No. 3.The called MS has been barred all incoming call. 4.The Called MS are not known at HLR
41. 1. The called MS is powered off MS BSS MSC VLR HLR GMSC ( MSISDN) ( MSISDN) ( IMSI) Initial and Final 1 Address Message 2 Send Routing Info 3 Routing Info Ack PSTN Subscriber Absent The Land hears the announcement of mobile is powered off Answers
42. 2. The called MS activates the CFU to a PSTN No. (MSISDN) (MSISDN) CFN 4 IFAM Answers MS BSS MSC VLR HLR GMSC PSTN Initial and Final 1 Address Message 2 Send Routing Info 3 Routing Info Ack
43. Answers 3. The called MS has been barred all incoming call. Call Barred MS BSS MSC VLR HLR GMSC (MSISDN) (MSISDN) Initial and Final 1 Address Message 2 Send Routing Info 3 Routing Info Ack PSTN
44. Answers 4. The Called MS are not known at HLR Unknown Subscriber MS BSS MSC VLR HLR GMSC (MSISDN) (MSISDN) Initial and Final 1 Address Message 2 Send Routing Info 3 Routing Info Ack PSTN
45. MS BSS MSC VLR HLR < FACCH> < FACCH> 1 Disconnect PSTN PSTN Release Mobile Release Mobile Initiated Call Clearing Sequence
46. MS BSS MSC VLR HLR < FACCH> < FACCH> < FACCH> 1 Disconnect PSTN PSTN Release Mobile Release 2 PSTN Release Complete Mobile Release Complete MS-MSC Signalling Released Mobile Initiated Call Clearing Sequence
47. MS BSS MSC VLR HLR < FACCH> < FACCH> < FACCH> < FACCH> 1 Disconnect PSTN PSTN Release Mobile Release 2 PSTN Release Complete Mobile Release Complete MS-MSC Signalling Released 3 Clear Command Channel Release Mobile Initiated Call Clearing Sequence
48. Mobile Initiated Call Clearing Sequence < FACCH> <FACCH> 4 DISC UA Clear Complete MS BSS MSC VLR HLR PSTN
49. Mobile Initiated Call Clearing Sequence < FACCH> <FACCH> 4 DISC UA Clear Complete 5 RLSD Release Complete MS BSS MSC VLR HLR PSTN
50. Brief Introduction to Location Update Location Update Sequence Several Typical Location Update Sequences
51. The types of Location Update : Brief Introdution to Location Update Periodic Location Update IMSI Attach/Detach Normal Location Update
53. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
54. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign 2 Location Update Request <SDCCH> HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
55. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign 2 Location Update Request <SDCCH> LAI & TMSI 3 Authentication & Ciphering HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
56. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign 2 Location Update Request <SDCCH> LAI & TMSI 3 Authentication & Ciphering 4 Forward New TMSI Location Update Accept < TMSI> <SDCCH> <TMSI> HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
57. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign 2 Location Update Request <SDCCH> LAI & TMSI 3 Authentication & Ciphering 4 Forward New TMSI Location Update Accept < TMSI> <SDCCH> <TMSI> 5 TMSI Reallocate Complete TMSI ACK < SDCCH> HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
58. Intra-VLR Location Update Sequence MS BSS MSC VLR <RACH> 1 Channel Request <AGCH> DCCH Assign 2 Location Update Request <SDCCH> LAI & TMSI 3 Authentication & Ciphering 4 Forward New TMSI Location Update Accept < TMSI> <SDCCH> <TMSI> 5 TMSI Reallocate Complete TMSI ACK < SDCCH> 6 Clear Command Clear Complete < SDCCH> < SDCCH> HLR Only sent to HLR if this is the first time the MS has Location Updated in this VLR
59. Location Update via IMSI Location Update via TMSI Inter-VLR Location Update Sequence
74. The mobile originated short message transfer procedure is separated from mobile terminated. The basic short message sequence consists of two parts: MO SMS Transfer and MT SMS Transfer. Short Message Sequence
75. MS BSS MSC VLR Interworking MSC 1 CHANNEL REQUEST <RACH> <AGCH> DCCH ASSIGN SIGNALING LINK ESTABLISHED SC MO SMS Transfer
76. MS BSS MSC VLR Interworking MSC 1 CHANNEL REQUEST <RACH> <AGCH> DCCH ASSIGN <SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC SC MO SMS Transfer
77. MS BSS MSC VLR Interworking MSC 1 CHANNEL REQUEST <RACH> <AGCH> DCCH ASSIGN <SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE SC MO SMS Transfer
78. MS BSS MSC VLR Interworking MSC 1 CHANNEL REQUEST <RACH> <AGCH> DCCH ASSIGN <SDCCH> SIGNALING LINK ESTABLISHED 2 REQ. FOR SERVICE CR CC 3 AUTHENTICATION SET Cipher MODE SC 4 RP_MO_DATA SIF_MO_SMS SIF_MO_SMS-Ack MO SMS Transfer
79. 5 MO_Forward_SM Short_Message MO_Forward_SM_Ack Short_Message_Ack (SC_No.) MO SMS Transfer MS BSS MSC VLR Interworking MSC SC
80. 5 MO_Forward_SM Short_Message MO_Forward_SM_Ack Short_Message_Ack 6 RP_ACK (SC_No.) MO SMS Transfer MS BSS MSC VLR Interworking MSC SC "Send Successfully" is displayed on the mobile
81. MT SMS Transfer For Forwarding a Short Message For Forwarding Several Short Message
82. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT SMS Transfer (A Message)
83. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page MT SMS Transfer (A Message)
84. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page 3 Paging Response Authentication and Ciphering MT SMS Transfer (A Message)
85. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM 2 SIF_MT_SMS Page Page Request 3 Paging Response Authentication and Ciphering 4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack MT SMS Transfer (A Message)
86. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT SMS Transfer (Several Messages) MT_Forward_SM (The More message To Send Flag is True)
87. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT SMS Transfer (Several Messages) MT_Forward_SM (The More message To Send Flag is True) 2 SIF_MT_SMS Page Paging Request
88. MS Servicing MSC VLR HLR Gateway MSC SC 1 Short Message SRI_For_SM SRI_For_SM_Ack MT_Forward_SM MT SMS Transfer (Several Messages) MT_Forward_SM (The More message To Send Flag is True) 2 SIF_MT_SMS Page Paging Request 3 Paging Response Authentication and Ciphering
89. MS Servicing MSC VLR HLR Gateway MSC SC 4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack MT SMS Transfer (Several Messages)
90. MS Servicing MSC VLR HLR Gateway MSC SC 4 Short_Message Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack MT SMS Transfer (Several Messages) 5 Short_Message MT_Forward_SM MT_Forward_SM (The More message To Send Flag is False) Short_Message_Ack MT_Forward_SM_Ack Short_Message_Ack Short_Message
91. What is the sequence when the originating subscriber sets the wrong SC No. in the mobile station. Question
92. MO_Forward_SM Short_Message MO_Forward_SM_Ack Short_Message_Ack RP_ACK (SC_No.) MS BSS MSC VLR Interworking MSC SC "Send Not Successfully" is displayed on the mobile Answer Illegal Subscriber Illegal Subscriber
110. MSC/VLRA MSC/VLRB 7 Process Access Signal Send End Signal Forward Access Signal Process Access Signal 8 Clear Forward Release Guard Send End Signal_Ack Basic Inter-MSC handover
111. MSC/VLRA MSC/VLRB 7 Process Access Signal Send End Signal Forward Access Signal Process Access Signal 8 Release Release Complete Send End Signal_Ack Basic Inter-MSC handover
112. MSC/VLRA MSC/VLRB HLRA 9 SendAuth. Info Auth Info Update Location InsertSubs.Data InsertSubs.Data_Ack UpdateLocation_Ack Cancellocation Cancellocation_Ack Basic Inter-MSC handover