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usama0795
2011-10-26, 01:03 AM
1 BSS Signaling Fundamental....................................................................................................1-1
1.1 A Interface......................................................................................................................................................1-2
1.1.1 A Interface Protocol Model....................................................................................................................1-2
1.1.2 Physical Layer on the A Interface..........................................................................................................1-3
1.1.3 MTP Layer on the A Interface...............................................................................................................1-3
1.1.4 SCCP Layer on the A Interface..............................................................................................................1-6
1.1.5 BSSAP Layer on the A Interface...........................................................................................................1-6
1.2 Abis Interface...............................................................................................................................................1-11
1.2.1 Abis Interface Protocol Model.............................................................................................................1-11
1.2.2 Abis Interface Structure......................................................................................................................1-12
1.2.3 Physical Layer on the Abis Interface ..................................................................................................1-14
1.2.4 LAPD Layer on the Abis Interface.......................................................................................................1-14
1.2.5 L3 Traffic Management Messages on the Abis Interface....................................................................1-15
1.2.6 L3 OM Messages on the Abis Interface...............................................................................................1-18
1.3 Um Interface.................................................................................................................................................1-20
1.3.1 Physical Layer on the Um Interface.....................................................................................................1-20
1.3.2 LAPD Layer on the Um Interface........................................................................................................1-21
1.3.3 L3 Entity on the Um Interface..............................................................................................................1-22
2 BSS Signaling Tracing..............................................................................................................2-1
2.1 Tracing the Messages on the Um Interface.....................................................................................................2-2
2.2 Tracing Messages on the Abis Interface.........................................................................................................2-3
2.2.1 Tracing the RSL Messages on the Abis Interface..................................................................................2-3
2.2.2 Tracing the OML Messages on the Abis Interface.................................................................................2-7
2.2.3 Tracing the ESL Messages on the Abis Interface..................................................................................2-9
2.2.4 Tracing the LAPD Messages on the Abis Interface.............................................................................2-12
2.3 Tracing the Messages on the A Interface......................................................................................................2-15
2.3.1 Tracing the BSSAP Messages on the A Interface................................................................................2-15
2.3.2 Tracing the MTP2 Messages on the Interface......................................................................................2-19
2.3.3 Tracing the MTP3 Messages on the A Interface..................................................................................2-22
2.3.4 Tracing the SCCP Messages on the A Interface..................................................................................2-25
2.4 Tracing Messages on the Pb Interface...........................................................................................................2-28
2.4.1 Tracing the Application Messages on the Pb Interface........................................................................2-28
2.4.2 Tracing the LAPD Messages on the Pb Interface................................................................................2-30
2.5 Tracing the Messages on the BSC-CBC Interface........................................................................................2-32
2.6 Tracing User Messages................................................................................................................................2-33
3 BSS System Information...........................................................................................................3-1
3.1 BSS System Information Type........................................................................................................................3-2
3.1.1 System Information Type 1 ...................................................................................................................3-2
3.1.2 System Information Types 2, 2bis, 2ter, and 2quater.............................................................................3-6
3.1.3 System Information Type 3 ...................................................................................................................3-8
3.1.4 System Information Type 4 .................................................................................................................3-11
3.1.5 System Information Types 5, 5bis, and 5ter.........................................................................................3-12
3.1.6 System Information Type 6 .................................................................................................................3-13
3.1.7 System Information Type 7 .................................................................................................................3-14
3.1.8 System Information Type 8 .................................................................................................................3-14
3.1.9 System Information Type 13 ...............................................................................................................3-14
3.2 Internal BSC Signaling Procedure of the System Information.....................................................................3-15
4 Immediate Assignment.............................................................................................................4-1
4.1 Immediate Assignment Procedure..................................................................................................................4-2
4.2 Internal BSC Signaling Procedure of Immediate Assignment........................................................................4-4
4.3 Abnormal Immediate Assignment Cases........................................................................................................4-4
4.3.1 Failure in Receiving an Establish Indication Message After Channel Activation.................................4-4
4.3.2 BSC Sending an Immediate Assignment Reject Message.....................................................................4-5
5 Classmark Update......................................................................................................................5-1
5.1 Classmark Update Procedure.........................................................................................................................5-2
6 Location Update.........................................................................................................................6-1
6.1 Location Update Procedure............................................................................................................................6-2
6.1.1 Periodic Update Procedure.....................................................................................................................6-2
6.1.2 IMSI Attach Procedure..........................................................................................................................6-3
6.1.3 Generic Location Update Procedure......................................................................................................6-3
6.2 Internal BSC Signaling Procedures of Location Update.................................................................................6-5
6.3 Abnormal Location Update Cases...................................................................................................................6-5
6.3.1 Location Update Not Started or Aborted on the MS Side......................................................................6-5
6.3.2 Location Update Failure on the Network Side.......................................................................................6-6
7 Authentication...........................................................................................................................7-1
7.1 Authentication Principles...............................................................................................................................7-2
7.2 Authentication Procedure...............................................................................................................................7-2
7.3 Authentication Failure....................................................................................................................................7-3
7.4 Internal BSC Signaling Procedure of Authentication.....................................................................................7-4
7.5 Abnormal Authentication Cases......................................................................................................................7-4
7.5.1 RR Connection Failure..........................................................................................................................7-5
7.5.2 Timer T3260 Expiry..............................................................................................................................7-5
7.5.3 SIM Unregistered..................................................................................................................................7-5
8 Ciphering....................................................................................................................................8-1
8.1 Ciphering Procedure.......................................................................................................................................8-2
8.2 Ciphering Mode Change................................................................................................................................8-3
8.3 Internal BSC Signaling Procedure of Ciphering.............................................................................................8-3
8.4 Abnormal Ciphering Cases............................................................................................................................8-4
8.4.1 BSS Sending a Cipher Mode Reject Message.......................................................................................8-4
8.4.2 MS Doing No Processing......................................................................................................................8-4
9 TMSI Reallocation....................................................................................................................9-1
9.1 TMSI Reallocation Procedure........................................................................................................................9-2
9.2 Internal BSC Signaling Procedure of TMSI Reallocation..............................................................................9-2
9.3 Abnormal TMSI Reallocation Cases...............................................................................................................9-3
9.3.1 TMSI Reallocation Caused by RR Connection Failure on the Network Side.......................................9-3
9.3.2 TMSI Reallocation Caused by T3250 Expiry........................................................................................9-3
10 Speech Channel Assignment...............................................................................................10-1
10.1 Speech Channel Assignment Procedure......................................................................................................10-2
10.2 Channel Mode Modification Procedure......................................................................................................10-3
10.3 Internal BSC Signaling Procedure of Speech Channel Assignment...........................................................10-4
10.4 Abnormal Speech Channel Assignment Cases...........................................................................................10-5
10.4.1 BSC Sending an Assignment Failure Message..................................................................................10-5
10.4.2 BSC Receiving a Connection Failure Indication Message................................................................10-6
10.4.3 BSC Receiving an Error Indication Message.....................................................................................10-7
11 Mobile Originating Call Establishment............................................................................11-1
11.1 Mobile Originating Call Establishment Procedure.....................................................................................11-2
11.1.1 Early Assignment Procedure..............................................................................................................11-2
11.1.2 Late Assignment Procedure...............................................................................................................11-4
11.1.3 Very Early Assignment Procedure.....................................................................................................11-6
11.2 Internal BSC Signaling Procedure of Mobile Originating Call Establishment...........................................11-7
11.3 Abnormal Mobile Originating Call Establishment Cases...........................................................................11-7
11.3.1 Calling MS Cannot Be Heard.............................................................................................................11-8
11.3.2 MSC Releasing the Call after Sending a CM Service Reject Message..............................................11-8
11.3.3 Abnormal Procedure Caused by MS in Busy State............................................................................11-9
11.3.4 MSC Sending a Disconnect Message Instead of an Assignment Request Message..........................11-9
11.3.5 Abnormal Procedures Caused by MS Hangup...................................................................................11-9
11.3.6 Abnormal Procedures Caused by MSC Sending a Clear Command Message or a Disconnect Message
....................................................................................................................................................................11-10
11.3.7 LAPD Reporting an Error Indication Message During Call Establishment....................................11-10
12 Mobile Terminating Call Establishment...........................................................................12-1
12.1 Mobile Terminating Call Establishment Procedure....................................................................................12-2
12.2 Internal BSC Signaling Procedure of Mobile Terminating Call Establishment.........................................12-3
12.3 Abnormal Mobile Terminating Call Establishment Cases..........................................................................12-3
12.3.1 No Paging Message on the A Interface..............................................................................................12-3
12.3.2 No Paging Message on the Abis Interface.........................................................................................12-4
12.3.3 No Paging Response on the Abis Interface........................................................................................12-5
12.3.4 No Paging Response on the A Interface.............................................................................................12-6
13 BSC Release............................................................................................................................13-1
13.1 Normal Release Procedure.........................................................................................................................13-2
13.2 Local Release Procedure............................................................................................................................13-4
14 Handover.................................................................................................................................14-1
14.1 Handover Procedure...................................................................................................................................14-2
14.1.1 Intra-BSC Handover Procedure.........................................................................................................14-2
14.1.2 Inter-BSC Handover Procedure.........................................................................................................14-4
14.1.3 Inter-MSC Handover Procedure.........................................................................................................14-6
14.1.4 Inter-System Handover Procedure.....................................................................................................14-7
14.2 Internal BSC Signaling Procedure of Handover.........................................................................................14-9
14.2.1 Internal BSC Signaling Procedure of the Intra-BSC Handover.........................................................14-9
14.2.2 Internal BSC Signaling Procedure of the Inter-BSC Handover.........................................................14-9
14.2.3 Internal BSC Signaling Procedure of the Inter-MSC Handover......................................................14-10
14.2.4 Internal BSC Signaling Procedure of the Inter-System Handover...................................................14-10
14.3 Abnormal Handover Cases........................................................................................................................14-10
14.3.1 No Available Channels in the Target Cell.......................................................................................14-11
14.3.2 Old BSS Not Receiving a Specified Message upon T8 Expiry.......................................................14-11
14.3.3 Inter-Cell Handover Failure (MS Returning to the Old Channel)....................................................14-12
14.3.4 BSC Receiving a Connection Failure Indication Message..............................................................14-12
14.3.5 Forced Handover Failure..................................................................................................................14-13
14.3.6 Handover Failure Caused by CIC Malfunction................................................................................14-13
14.3.7 Handover Failure Caused by MS Access Failure.............................................................................14-13
15 Call Re-Establishment...........................................................................................................15-1
15.1 Call Re-Establishment Procedure................................................................................................................15-2
15.2 Internal BSC Signaling Procedure of Call Re-Establishment.....................................................................15-4
15.3 Abnormal Call Re-Establishment Cases.....................................................................................................15-4
15.3.1 Network Sending a CM Service Reject Message...............................................................................15-4
15.3.2 Call Re-Establishment Not Allowed or Re-Establishment Failure....................................................15-5
15.3.3 RR Connection Failure.......................................................................................................................15-5
16 Directed Retry.........................................................................................................................16-1
16.1 Directed Retry Procedure...........................................................................................................................16-2
16.1.1 Intra-BSC Directed Retry Procedure..................................................................................................16-2
16.1.2 Inter-BSC directed retry procedure....................................................................................................16-4
16.1.3 Inter-MSC directed retry procedure...................................................................................................16-6
16.2 Internal BSC Signaling Procedure of Directed Retry.................................................................................16-7
16.2.1 Internal BSC Signaling Procedure of the Intra-BSC Directed Retry.................................................16-8
16.2.2 Internal BSC Signaling Procedure of the Inter-BSC Directed Retry.................................................16-8
16.2.3 Internal BSC Signaling Procedure of the Inter-MSC Directed Retry................................................16-9
16.3 Abnormal Directed Retry Cases..................................................................................................................16-9
16.3.1 No Available Channels in the Target Cell.........................................................................................16-9
16.3.2 Channel Activation Failure..............................................................................................................16-10
17 BSC Re-Assignment...............................................................................................................17-1
17.1 BSC Re-Assignment Procedure..................................................................................................................17-2
17.2 Internal BSC Signaling Procedure of BSC Re-Assignment........................................................................17-3
17.3 Abnormal BSC Re-Assignment Cases........................................................................................................17-3
17.3.1 BSC Failure in Initiating a Re-Assignment Procedure......................................................................17-3
18 Queuing and Preemption.....................................................................................................18-1
18.1 Queuing Procedure.....................................................................................................................................18-2
18.2 Preemption Procedure................................................................................................................................18-3
18.3 Internal BSC Signaling Procedure of Queuing and Preemption.................................................................18-4
18.4 Abnormal Queuing and Preemption Cases.................................................................................................18-4
18.4.1 BSC Sending the MSC a Clear Request Message..............................................................................18-4
19 Short Message Service...........................................................................................................19-1
19.1 Short Message Transfer Procedure.............................................................................................................19-2
19.1.1 Short Message Sending Procedure Initiated by an Idle MS...............................................................19-2
19.1.2 Short Message Receiving Procedure Initiated by an Idle MS............................................................19-3
19.1.3 Short Message Sending Procedure Initiated by a Busy MS...............................................................19-5
19.1.4 Short message receiving procedure initiated by a busy MS...............................................................19-5
19.2 Internal BSC Signaling Procedure of Short Message Transfer...................................................................19-6
19.3 Abnormal Short Message Transfer Cases...................................................................................................19-7
19.3.1 Short Message Sending Failure due to Authentication and Ciphering Disabled...............................19-7
20 Short Message Service Cell Broadcast...............................................................................20-1
20.1 SMSCB Procedure.....................................................................................................................................20-2
20.1.1 CBC-BSC SMSCB Procedure...........................................................................................................20-2
20.1.2 BSC-BTS SMSCB Procedure............................................................................................................20-5
20.2 Internal BSC Signaling Procedure of the SMSCB......................................................................................20-6
20.3 Abnormal SMSCB Cases...........................................................................................................................20-6
20.3.1 MS Failure in Receiving Cell Broadcast Messages...........................................................................20-7
20.3.2 CBCH Not Configured in a Cell........................................................................................................20-7

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