GSM
`TECHNICAL
`SPECIFICATION
`
`GSM 04.08
`
`December 1995
`
`Version 5.0.0
`
`Source: ETSI TC-SMG
`
`Reference: TS/SMG-030408Q
`
`ICS: 33.060.50
`
`Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
`
`Digital cellular telecommunications system (Phase 2+);
`Mobile radio interface layer 3 specification
`(GSM 04.08)
`
`ETSI
`
`European Telecommunications Standards Institute
`
`ETSI Secretariat
`
`Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
`Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
`X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
`
`Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
`
`Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
`foregoing restriction extend to reproduction in all media.
`
`© European Telecommunications Standards Institute 1995. All rights reserved.
`
`Page 1
`
`New presentation - see History box
`
`

`

`GSM
`TECHNICAL
`SPECIFICATION
`
`GSM 04.08
`
`December 1995
`
`Version 5.0.0
`
`Source: ETSI TC-SMG
`
`Reference: TS/SMG-030408Q
`
`ICS: 33.060.50
`
`Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
`
`Digital cellular telecommunications system (Phase 2+);
`Mobile radio interface layer 3 specification
`(GSM 04.08)
`
`ETSI
`
`European Telecommunications Standards Institute
`
`ETSI Secretariat
`
`Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
`Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
`X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
`
`Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
`
`Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
`foregoing restriction extend to reproduction in all media.
`
`© European Telecommunications Standards Institute 1995. All rights reserved.
`
`Page 1
`
`New presentation - see History box
`
`

`

`Page 2
`GSM 04.08 version 5.0.0 December 1995
`
`Whilst every care has been taken in the preparation and publication of this document, errors in content,
`typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
`"ETSI Editing and Committee Support Dept." at the address shown on the title page.
`
`

`

`Page 3
`GSM 04.08 version 5.0.0 December 1995
`
`Contents
`
`Foreword ......................................................................................................................................... 19
`
`0 Scope ........................................................................................................................................... 21
`0.1 Scope of the Technical Specification ................................................................................... 21
`0.2 Application to the interface structures.................................................................................. 21
`0.3 Structure of layer 3 procedures .......................................................................................... 22
`0.4 Test procedures ................................................................................................................ 22
`0.5 Use of logical channels....................................................................................................... 22
`0.6 Overview of control procedures .......................................................................................... 23
`0.6.1 List of procedures............................................................................................. 23
`
`1 Normative references ..................................................................................................................... 25
`
`2 Definitions and abbreviations........................................................................................................... 30
`2.1 Random values.................................................................................................................. 30
`2.2 Vocabulary........................................................................................................................ 30
`
`3 Radio Resource management procedures........................................................................................ 31
`3.1 Overview/General.............................................................................................................. 31
`3.1.1 General ........................................................................................................... 31
`3.1.2 Services provided to upper layers ...................................................................... 31
`3.1.2.1 Idle mode................................................................................... 31
`3.1.2.2 Establishment and release of a RR connection .............................. 31
`3.1.2.3 RR connected mode.................................................................... 32
`3.1.3 Services required from data link and physical layers............................................ 32
`3.1.4 Change of dedicated channels ........................................................................... 32
`3.1.4.1 Change of dedicated channels using SAPI = 0............................... 32
`3.1.4.2 Change of dedicated channels using other SAPIs than 0 ................ 33
`3.1.4.3 Sequenced message transfer operation........................................ 33
`3.1.4.3.1 Variables and sequence numbers ...................... 33
`3.1.4.3.1.2 Send sequence number N(SD)........................ 33
`3.1.4.3.2 Procedures for the initiation, transfer execution
`and termination of the sequenced
`message transfer operation ................ 33
`3.1.4.3.2.2 Transfer Execution......................................... 34
`3.1.5 Procedure for Service Request and Contention Resolution................................... 34
`3.2 Idle mode procedures ........................................................................................................ 35
`3.2.1 Mobile station side............................................................................................ 35
`3.2.2 Network side.................................................................................................... 35
`3.2.2.1 System information broadcasting.................................................. 35
`3.2.2.2 Paging 36
`3.3 RR connection establishment.............................................................................................. 36
`3.3.1 RR connection establishment initiated by the mobile station: immediate
`assignment procedure ............................................................................ 36
`3.3.1.1 Permission to access the network ................................................ 36
`3.3.1.2 Initiation of the immediate assignment procedure........................... 37
`3.3.1.3 Answer from the network............................................................. 38
`3.3.1.3.1 On receipt of a CHANNEL REQUEST message.. 38
`3.3.1.3.2 Assignment rejection......................................... 39
`3.3.1.4 Assignment completion................................................................ 40
`3.3.1.5 Abnormal cases.......................................................................... 40
`3.3.2 Paging procedure ............................................................................................. 41
`3.3.2.1 Paging initiation by the network .................................................... 41
`3.3.2.2 Paging response......................................................................... 42
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`3.3.2.3 Abnormal cases ..........................................................................42
`3.4 RR connection transfer phase.............................................................................................43
`3.4.1 SACCH procedures...........................................................................................43
`3.4.1.1 General 43
`3.4.1.2 Measurement report....................................................................43
`3.4.2 Transfer of messages and link layer service provision..........................................43
`3.4.3 Channel assignment procedure ..........................................................................44
`3.4.3.1 Channel assignment initiation........................................................44
`3.4.3.2 Assignment completion ................................................................46
`3.4.3.3 Abnormal cases ..........................................................................46
`3.4.4 Handover procedure..........................................................................................47
`3.4.4.1 Handover initiation .......................................................................48
`3.4.4.2 Physical channel establishment.....................................................49
`3.4.4.2.1 Finely synchronized cell case.............................49
`3.4.4.2.2 Non synchronized cell case................................50
`3.4.4.2.3 Pseudo-synchronised cell case ..........................51
`3.4.4.2.4 Pre-synchronised cell case................................51
`3.4.4.3 Handover completion ...................................................................51
`3.4.4.4 Abnormal cases ..........................................................................52
`3.4.5 Frequency redefinition procedure .......................................................................53
`3.4.5.1 Abnormal cases ..........................................................................53
`3.4.6 Channel mode modify procedure ........................................................................54
`3.4.6.1 Initiation of the channel mode modify procedure.............................54
`3.4.6.2 Completion of channel mode modify procedure..............................54
`3.4.6.3 Abnormal cases ..........................................................................54
`3.4.7 Ciphering mode setting procedure......................................................................55
`3.4.7.1 Ciphering mode setting initiation ...................................................55
`3.4.7.2 Ciphering mode setting completion ...............................................55
`3.4.8 Additional channel assignment procedure............................................................56
`3.4.8.1 Additional assignment procedure initiation .....................................56
`3.4.8.2 Additional assignment procedure completion ................................. 56
`3.4.8.3 Abnormal cases ..........................................................................56
`3.4.9 Partial channel release procedure ......................................................................57
`3.4.9.1 Partial release procedure initiation ................................................57
`3.4.9.2 Abnormal cases ..........................................................................57
`3.4.10 Classmark change procedure...........................................................................57
`3.4.11 Classmark interrogation procedure ...................................................................58
`3.4.11.1 Classmark interrogation initiation ................................................58
`3.4.11.2 Classmark interrogation completion ............................................58
`3.5 RR connection release procedure .......................................................................................58
`3.5.1 Normal release procedure .................................................................................58
`3.5.1.1 Channel release procedure initiation..............................................58
`3.5.1.2 Abnormal cases ..........................................................................59
`3.5.2 Radio link failure ...............................................................................................59
`3.5.2.1 Mobile side.................................................................................59
`3.5.2.2 Network side ..............................................................................59
`3.5.3 RR connection abortion .....................................................................................60
`3.6 Receiving a RR STATUS message by a RR entity................................................................60
`
`4 Elementary procedures for Mobility Management .............................................................................61
`4.1 General.............................................................................................................................61
`4.1.1 Type of MM procedures ....................................................................................61
`4.1.2 MM sublayer states ..........................................................................................62
`4.1.2.1 MM sublayer states in the Mobile Station......................................62
`4.1.2.1.1 Main states ......................................................62
`4.1.2.1.2 Substates of the MM IDLE state........................65
`4.1.2.2 The update Status.......................................................................66
`4.1.2.3 MM sublayer states on the network side.......................................67
`4.2 Behaviour in MM IDLE State...............................................................................................67
`4.2.1 Primary Service State selection .........................................................................68
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`4.2.1.1 Selection of the Service State after Power On. ............................. 68
`4.2.1.2 Other Cases............................................................................... 69
`4.2.2 Detailed Description of the MS behaviour in MM IDLE State. ............................... 69
`4.2.2.1 Service State, NORMAL SERVICE .............................................. 69
`4.2.2.2 Service State, ATTEMPTING TO UPDATE. .................................. 70
`4.2.2.3 Service State, LIMITED SERVICE ............................................... 70
`4.2.2.4 Service State, NO IMSI............................................................... 70
`4.2.2.5 Service State, SEARCH FOR PLMN, NORMAL SERVICE ............. 71
`4.2.2.6 Service State, SEARCH FOR PLMN ............................................ 71
`4.2.3 Service state when back to state MM IDLE from another state ............................ 71
`4.3 MM common procedures.................................................................................................... 72
`4.3.1 TMSI reallocation procedure.............................................................................. 72
`4.3.1.1 TMSI reallocation initiation by the network .................................... 73
`4.3.1.2 TMSI reallocation completion by the Mobile Station ....................... 73
`4.3.1.3 TMSI reallocation completion in the network.................................. 73
`4.3.1.4 Abnormal cases.......................................................................... 73
`4.3.2 Authentication procedure ................................................................................... 75
`4.3.2.1 Authentication request by the network .......................................... 75
`4.3.2.2 Authentication response by the Mobile Station............................... 75
`4.3.2.3 Authentication processing in the network....................................... 75
`4.3.2.4 Ciphering key sequence number................................................... 76
`4.3.2.5 Unsuccessful authentication ......................................................... 76
`4.3.2.6 Abnormal cases.......................................................................... 77
`4.3.3 Identification procedure..................................................................................... 77
`4.3.3.1 Identity request by the network .................................................... 77
`4.3.3.2 Identification response by the Mobile Station................................. 77
`4.3.3.3 Abnormal cases.......................................................................... 78
`4.3.4 IMSI detach procedure ..................................................................................... 78
`4.3.4.1 IMSI detach initiation by the Mobile Station ................................... 78
`4.3.4.2 IMSI detach procedure in the network .......................................... 78
`4.3.4.3 IMSI detach completion by the Mobile Station ............................... 79
`4.3.4.4 Abnormal cases.......................................................................... 79
`4.3.5 Abort procedure ............................................................................................... 79
`4.3.5.1 Abort procedure initiation by the network ...................................... 79
`4.3.5.2 Abort procedure in the Mobile Station........................................... 79
`4.4 MM specific procedures..................................................................................................... 80
`4.4.1 Location updating procedure.............................................................................. 80
`4.4.2 Periodic updating.............................................................................................. 81
`4.4.3 IMSI attach procedure ...................................................................................... 82
`4.4.4 Generic Location Updating procedure................................................................. 83
`4.4.4.1 Location updating initiation by the Mobile Station ........................... 83
`4.4.4.1a Network Request for Additional MS Capability Information ........... 83
`4.4.4.2 Identification request from the network ......................................... 83
`4.4.4.3 Authentication by the network ...................................................... 83
`4.4.4.4 Ciphering mode setting by the network ......................................... 83
`4.4.4.5 Attempt Counter ......................................................................... 84
`4.4.4.6 Location updating accepted by the network................................... 84
`4.4.4.7 Location updating not accepted by the network ............................. 85
`4.4.4.8 Release of RR connection after location updating .......................... 86
`4.4.4.9 Abnormal cases on the Mobile Station side ................................... 86
`4.4.4.10 Abnormal cases on the network side .......................................... 87
`4.5 Connection management sublayer service provision.............................................................. 88
`4.5.1 MM connection establishment............................................................................ 88
`4.5.1.1 MM connection establishment initiated by the mobile station ........... 88
`4.5.1.2 Abnormal cases.......................................................................... 91
`4.5.1.3 MM connection establishment initiated by the network ................... 92
`4.5.1.4 Abnormal cases.......................................................................... 92
`4.5.1.5 MM connection establishment for emergency calls......................... 93
`4.5.1.6 Call re-establishment................................................................... 94
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`4.5.1.6.1 Call re-establishment, initiation by the mobile
`station ...............................................94
`4.5.1.6.2 Abnormal cases................................................96
`4.5.1.7 Forced release during MO MM connection establishment...............97
`4.5.2 MM connection information transfer phase..........................................................97
`4.5.2.1 Sending CM messages................................................................97
`4.5.2.2 Receiving CM messages .............................................................98
`4.5.2.3 Abnormal cases ..........................................................................98
`4.5.3 MM connection release .....................................................................................98
`4.5.3.1 Release of associated RR connection...........................................99
`4.6 Receiving a MM STATUS message by a MM entity..............................................................99
`
`5 Elementary procedures for circuit-switched Call Control .................................................................. 100
`5.1 Overview......................................................................................................................... 100
`5.1.1 General.......................................................................................................... 100
`5.1.2 Call Control States.......................................................................................... 103
`5.1.2.1 Call states at the Mobile Station side of the interface................... 103
`5.1.2.1.1 Null (State U0)................................................ 103
`5.1.2.1.2 MM Connection pending (U0.1)........................ 103
`5.1.2.1.3 Call initiated (U1) ............................................ 103
`5.1.2.1.4 Mobile originating call proceeding (U3) ............. 103
`5.1.2.1.5 Call delivered (U4) .......................................... 103
`5.1.2.1.6 Call present (U6) ............................................ 103
`5.1.2.1.7 Call received (U7) ........................................... 103
`5.1.2.1.8 Connect Request (U8)..................................... 104
`5.1.2.1.9 Mobile terminating call confirmed (U9).............. 104
`5.1.2.1.10 Active (U10) ................................................. 104
`5.1.2.1.11 Disconnect request (U11) .............................. 104
`5.1.2.1.12 Disconnect indication (U12)............................ 104
`5.1.2.1.13 Release request (U19) .................................. 104
`5.1.2.1.14 Mobile originating modify (U26)...................... 104
`5.1.2.1.15 Mobile terminating modify (U27)..................... 104
`5.1.2.2 Network call states.................................................................... 105
`5.1.2.2.1 Null (State N0)................................................ 105
`5.1.2.2.2 MM connection pending (N0.1) ........................ 105
`5.1.2.2.3 Call initiated (N1) ............................................ 105
`5.1.2.2.4 Mobile originating call proceeding (N3) ............. 105
`5.1.2.2.5 Call delivered (N4) .......................................... 105
`5.1.2.2.6 Call present (N6) ............................................ 105
`5.1.2.2.7 Call received (N7) ........................................... 105
`5.1.2.2.8 Connect request (N8)...................................... 106
`5.1.2.2.9 Mobile terminating call confirmed (N9).............. 106
`5.1.2.2.10 Active (N10) ................................................. 106
`5.1.2.2.11 {Not used}.................................................... 106
`5.1.2.2.12 Disconnect indication (N12)............................ 106
`5.1.2.2.13 Release request (N19) .................................. 106
`5.1.2.2.14 Mobile originating modify (N26)...................... 106
`5.1.2.2.15 Mobile terminating modify (N27)..................... 106
`5.1.2.2.16 Connect Indication (N28) ............................... 107
`5.2 Call establishment procedures .......................................................................................... 107
`5.2.1 Mobile originating call establishment................................................................. 108
`5.2.1.1 Call initiation ............................................................................. 108
`5.2.1.2 Receipt of a setup message ...................................................... 109
`5.2.1.3 Receipt of a CALL PROCEEDING message ............................... 110
`5.2.1.4 Notification of progressing mobile originated call .......................... 111
`5.2.1.4.1 Notification of interworking in connection with
`mobile originated call establishment ... 111
`5.2.1.4.2 Call progress in the PLMN/ISDN environment.... 111
`5.2.1.5 Alerting 112
`5.2.1.6 Call connected .......................................................................... 112
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`5.2.1.7 Call rejection............................................................................. 113
`5.2.1.8 Transit network selection........................................................... 113
`5.2.1.9 Traffic channel assignment at mobile originating call establishment 113
`5.2.1.10 Call queuing at mobile originating call establishment................... 113
`5.2.2 Mobile terminating call establishment................................................................ 114
`5.2.2.1 Call indication ........................................................................... 114
`5.2.2.2 Compatibility checking ............................................................... 114
`5.2.2.3 Call confirmation ....................................................................... 114
`5.2.2.3.1 Response to SETUP....................................... 114
`5.2.2.3.2 Receipt of CALL CONFIRMED and ALERTING
`by the network ................................. 115
`5.2.2.3.3 Call failure procedures .................................... 116
`5.2.2.3.4 Called Mobile Station clearing during mobile
`terminating call establishment............ 116
`5.2.2.4 Notification of interworking in connection with mobile terminating
`call establishment ......................................................... 116
`5.2.2.5 Call accept ............................................................................... 117
`5.2.2.6 Active indication ........................................................................ 117
`5.2.2.7 Traffic channel assignment at mobile terminating call establishment117
`5.2.2.8 Call queuing at mobile terminating call establishment.................... 118
`5.2.2.9 User connection attachment during a mobile terminating call......... 118
`5.3 Signalling procedures during the "active" state ................................................................... 118
`5.3.1 User notification procedure.............................................................................. 118
`5.3.2 Call rearrangements ....................................................................................... 118
`5.3.3 Not used ........................................................................................................ 118
`5.3.4 Support of Dual Services................................................................................. 118
`5.3.4.1 Service Description ................................................................... 119
`5.3.4.2 Call establishment..................................................................... 119
`5.3.4.2.1 Mobile Originating Establishment ..................... 119
`5.3.4.2.2 Mobile Terminating Establishment.................... 120
`5.3.4.3 Changing the Call Mode............................................................. 120
`5.3.4.3.1 Initiation of in-call modification ......................... 121
`5.3.4.3.2 Successful completion of in-call modification ..... 121
`5.3.4.3.3 Change of the channel configuration ................. 121
`5.3.4.3.4 Failure of in-call modification............................ 122
`5.3.4.3.4.2 Mobile Station rejection of in-call modification 122
`5.3.4.3.4.3 Time-out recovery........................................ 122
`5.3.4.4 Abnormal procedures ................................................................ 122
`5.4 Call clearing .................................................................................................................... 124
`5.4.1 Terminology ................................................................................................... 124
`5.4.2 Exception conditions ....................................................................................... 124
`5.4.3 Clearing initiated by the Mobile Station ............................................................. 125
`5.4.3.1 Initiation of call clearing ............................................................. 125
`5.4.3.2 Receipt of a DISCONNECT message from the Mobile Station...... 125
`5.4.3.3 Receipt of a RELEASE message from the network ..................... 125
`5.4.3.4 Receipt of a RELEASE COMPLETE message from the Mobile
`Station......................................................................... 125
`5.4.3.5 Abnormal cases........................................................................ 125
`5.4.4 Clearing initiated by the network ...................................................................... 126
`5.4.4.1 Clearing when tones/announcements provided............................. 126
`5.4.4.1.1 Receipt of a DISCONNECT message with
`progress indicator #8 from the
`network ........................................... 126
`5.4.4.1.2 Expiry of timer T306 ....................................... 126
`5.4.4.2 Clearing when tones/announcements not provided ....................... 127
`5.4.4.2.1 Receipt of a DISCONNECT message without
`progress indicator or with progress
`indicator different from #8 from the
`network ........................................... 127
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`5.4.4.2.2 Receipt of a RELEASE message from the
`Mobile Station .................................. 127
`5.4.4.2.3 Abnormal cases.............................................. 127
`5.4.4.3 Completion of clearing ............................................................... 128
`5.4.4.3.1 Abnormal cases.............................................. 128
`5.4.5 Clear collision ................................................................................................. 128
`5.5 Miscellaneous procedures ................................................................................................ 129
`5.5.1 In-band tones and announcements ................................................................... 129
`5.5.2 Call collisions.................................................................................................. 129
`5.5.3 Status procedures .......................................................................................... 130
`5.5.3.1 Status enquiry procedure........................................................... 130
`5.5.3.2 Reception of a STATUS message by a CC entity ........................ 130
`5.5.3.2.1 STATUS message with incompatible state........ 130
`5.5.3.2.2 STATUS message with compatible state .......... 131
`5.5.4 Call re-establishment, mobile station side ......................................................... 131
`5.5.4.1 Indication from the mobility management sublayer ....................... 131
`5.5.4.2 Reaction of call control .............................................................. 131
`5.5.4.3 Completion of re-establishment .................................................. 132
`5.5.4.4 Unsuccessful outcome ............................................................... 132
`5.5.5 Call re-establishment, network side.................................................................. 132
`5.5.5.1 State alignment......................................................................... 132
`5.5.6 Progress........................................................................................................ 132
`5.5.7 DTMF protocol control procedure..................................................................... 133
`5.5.7.1 Start DTMF request by the Mobile Station .................................. 133
`5.5.7.2 Start DTMF response by the network ......................................... 133
`5.5.7.3 Stop DTMF request by the Mobile Station................................... 133
`5.5.7.4 Stop DTMF response by the network ......................................... 134
`5.5.7.5 Sequencing of subsequent start DTMF requests by the Mobile
`Station ......................................................................... 134
`
`6 Support of packet services. .......................................................................................................... 136
`
`7 Examples of structured procedures ............................................................................................... 137
`7.1 General........................................................................................................................... 137
`7.1.1 Paging request ............................................................................................... 138
`7.1.2 Immediate assignment .................................................................................... 138
`7.1.3 Service request and contention resolution ......................................................... 139
`7.1.4 Authe