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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
Radio Resource Control (RRC);
Protocol specification
(3GPP TS 25.331 version 15.4.0 Release 15)
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3GPP TS 25.331 version 15.4.0 Release 15 1 ETSI TS 125 331 V15.4.0 (2018-10)
Reference
RTS/TSGR-0625331vf40
Keywords
UMTS
ETSI
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ETSI
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3GPP TS 25.331 version 15.4.0 Release 15 2 ETSI TS 125 331 V15.4.0 (2018-10)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 25.331 version 15.4.0 Release 15 3 ETSI TS 125 331 V15.4.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 40
1 Scope . 41
2 References . 41
3 Definitions and abbreviations . 44
3.1 Definitions . 44
3.2 Abbreviations . 47
4 General . 50
4.1 Overview of the specification . 50
4.2 RRC Layer Model . 51
4.3 Protocol specification principles . 54
5 RRC Functions and Services provided to upper layers . 54
5.1 RRC Functions . 54
5.2 RRC Services provided to upper layers . 55
5.3 Primitives between RRC and upper layers . 55
6 Services expected from lower layers . 55
6.1 Services expected from Layer 2 . 55
6.2 Services expected from Layer 1 . 55
6.3 Signalling Radio Bearers . 55
7 Protocol states . 56
7.1 Overview of RRC States and State Transitions including GSM and E-UTRA . 56
7.2 Processes in UE modes/states . 57
7.2.1 UE Idle mode . 57
7.2.2 UTRA RRC Connected mode . 57
7.2.2.1 URA_PCH or CELL_PCH state . 57
7.2.2.2 CELL_FACH state . 58
7.2.2.3 CELL_DCH state . 59
8 RRC procedures . 60
8.1 RRC Connection Management Procedures . 61
8.1.1 Broadcast of system information . 61
8.1.1.1 General . 62
8.1.1.1.1 System information structure . 62
8.1.1.1.2 System information blocks . 62
8.1.1.1.3 Segmentation and concatenation of system information blocks . 70
8.1.1.1.4 Re-assembly of segments . 71
8.1.1.1.5 Scheduling of system information . 72
8.1.1.2 Initiation . 73
8.1.1.3 Reception of SYSTEM INFORMATION messages by the UE . 73
8.1.1.4 Void. 73
8.1.1.5 Actions upon reception of the Master Information Block and Scheduling Block(s) . 73
8.1.1.6 Actions upon reception of system information blocks . 78
8.1.1.6.1 System Information Block type 1 . 80
8.1.1.6.2 System Information Block type 2 . 80
8.1.1.6.3 System Information Block type 3 . 81
8.1.1.6.4 System Information Block type 4 . 86
8.1.1.6.5 System Information Block type 5 and 5bis . 86
8.1.1.6.6 System Information Block type 6 . 92
8.1.1.6.7 System Information Block type 7 . 95
8.1.1.6.8 Void . 95
8.1.1.6.9 Void . 95
ETSI
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3GPP TS 25.331 version 15.4.0 Release 15 4 ETSI TS 125 331 V15.4.0 (2018-10)
8.1.1.6.10 Void . 95
8.1.1.6.11 System Information Block type 11 . 95
8.1.1.6.11a System Information Block type 11bis . 97
8.1.1.6.11b System Information Block type 11ter . 97
8.1.1.6.12 System Information Block type 12 . 98
8.1.1.6.13 System Information Block type 13 . 99
8.1.1.6.14 System Information Block type 14 . 100
8.1.1.6.15 System Information Block type 15 . 100
8.1.1.6.15.0 System Information Block type 15bis . 100
8.1.1.6.15.1 System Information Block type 15.1 . 100
8.1.1.6.15.1a System Information Block type 15.1bis . 101
8.1.1.6.15.1b 101
8.1.1.6.15.2 System Information Block type 15.2 . 101
8.1.1.6.15.2a System Information Block type 15.2bis . 101
8.1.1.6.15.2b System Information Block type 15.2ter . 102
8.1.1.6.15.3 System Information Block type 15.3 . 102
8.1.1.6.15.3a System Information Block type 15.3bis . 103
8.1.1.6.15.4 System Information Block type 15.4 . 103
8.1.1.6.15.5 System Information Block type 15.5 . 104
8.1.1.6.15.6 System Information Block type 15.6 . 104
8.1.1.6.15.7 System Information Block type 15.7 . 104
8.1.1.6.15.8 System Information Block type 15.8 . 104
8.1.1.6.16 System Information Block type 16 . 104
8.1.1.6.17 System Information Block type 17 . 105
8.1.1.6.18 System Information Block type 18 . 105
8.1.1.6.19 System Information Block type 19 . 106
8.1.1.6.20 System Information Block type 20 . 107
8.1.1.6.21 System Information Block type 21 . 107
8.1.1.6.22 System Information Block type 22 . 108
8.1.1.6.23 System Information Block type 23 . 108
8.1.1.6.24 System Information Block type 24 . 108
8.1.1.6.25 System Information Block type 25 . 109
8.1.1.7 Modification of system information . 110
8.1.1.7.1 Modification of system information blocks using a value tag . 110
8.1.1.7.2 Synchronised modification of system information blocks . 111
8.1.1.7.3 Actions upon system information change . 111
8.1.1.7.4 Actions upon expiry of a system information expiry timer . 112
8.1.1.8 Reception of System Information Container by the UE . 113
8.1.2 Paging . 113
8.1.2.1 General . 113
8.1.2.2 Initiation . 113
8.1.2.3 Reception of a PAGING TYPE 1 message by the UE . 114
8.1.3 RRC connection establishment . 115
8.1.3.1 General . 116
8.1.3.2 Initiation . 116
8.1.3.3 RRC CONNECTION REQUEST message contents to set . 117
8.1.3.4 Reception of an RRC CONNECTION REQUEST message by the UTRAN . 120
8.1.3.5 Cell re-selection, T300 or T318 timeout . 120
8.1.3.5a Abortion of RRC connection establishment . 122
8.1.3.6 Reception of an RRC CONNECTION SETUP message by the UE . 122
8.1.3.7 Physical channel failure or cell re-selection . 128
8.1.3.8 Invalid RRC CONNECTION SETUP message, unsupported configuration or invalid
configuration . 129
8.1.3.9 Reception of an RRC CONNECTION REJECT message by the UE . 130
8.1.3.10 Invalid RRC CONNECTION REJECT message . 133
8.1.3.11 Logging of failed RRC Connection Establishment . 134
8.1.4 RRC connection release . 135
8.1.4.1 General . 135
8.1.4.2 Initiation . 135
8.1.4.3 Reception of an RRC CONNECTION RELEASE message by the UE . 135
8.1.4.4 Invalid RRC CONNECTION RELEASE message . 137
8.1.4.5 Cell re-selection or radio link failure . 138
ETSI
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3GPP TS 25.331 version 15.4.0 Release 15 5 ETSI TS 125 331 V15.4.0 (2018-10)
8.1.4.6 Expiry of timer T308, unacknowledged mode transmission . 138
8.1.4.7 Void. 139
8.1.4.8 Reception of an RRC CONNECTION RELEASE COMPLETE message by UTRAN . 139
8.1.4.9 Unsuccessful transmission of the RRC CONNECTION RELEASE COMPLETE message,
acknowledged mode transmission . 139
8.1.4.10 Detection of loss of dedicated physical channel by UTRAN in CELL_DCH state . 139
8.1.4.11 Failure to receive RRC CONNECTION RELEASE COMPLETE message by UTRAN . 139
8.1.4a RRC connection release requested by upper layers . 139
8.1.4a.1 General . 139
8.1.4a.2 Initiation . 139
8.1.5 Void . 140
8.1.6 Transmission of UE capability information . 140
8.1.6.1 General . 140
8.1.6.2 Initiation . 140
8.1.6.3 Reception of a UE CAPABILITY INFORMATION message by the UTRAN . 144
8.1.6.4 Reception of the UE CAPABILITY INFORMATION CONFIRM message by the UE . 144
8.1.6.5 Invalid UE CAPABILITY INFORMATION CONFIRM message . 144
8.1.6.6 T304 timeout . 145
8.1.7 UE capability enquiry . 145
8.1.7.1 General . 145
8.1.7.2 Initiation . 145
8.1.7.3 Reception of a UE CAPABILITY ENQUIRY message by the UE . 146
8.1.7.4 Invalid UE CAPABILITY ENQUIRY message . 146
8.1.8 Initial Direct transfer . 146
8.1.8.1 General . 146
8.1.8.2 Initiation of Initial direct transfer procedure in the UE . 146
8.1.8.2a RLC re-establishment or inter-RAT change . 149
8.1.8.2ab Inter-RAT handover from UTRAN to GERAN Iu mode . 149
8.1.8.2b Abortion of signalling connection establishment . 149
8.1.8.2c Inter-RAT handover from UTRAN to E-UTRAN . 149
8.1.8.3 Reception of INITIAL DIRECT TRANSFER message by the UTRAN . 149
8.1.9 Downlink Direct transfer . 150
8.1.9.1 General . 150
8.1.9.2 Initiation of downlink direct transfer procedure in the UTRAN . 150
8.1.9.3 Reception of a DOWNLINK DIRECT TRANSFER message by the UE . 150
8.1.9.3a No signalling connection exists . 150
8.1.9.4 Invalid DOWNLINK DIRECT TRANSFER message . 151
8.1.10 Uplink Direct transfer . 151
8.1.10.1 General . 151
8.1.10.2 Initiation of uplink direct transfer procedure in the UE . 152
8.1.10.2a RLC re-establishment or inter-RAT change . 152
8.1.10.2b Inter-RAT handover from UTRAN to GERAN Iu mode . 153
8.1.10.2c Inter-RAT handover from UTRAN to E-UTRAN . 153
8.1.10.3 Reception of UPLINK DIRECT TRANSFER message by the UTRAN . 153
8.1.11 UE dedicated paging . 153
8.1.11.1 General . 153
8.1.11.2 Initiation . 153
8.1.11.3 Reception of a PAGING TYPE 2 message by the UE . 153
8.1.11.4 Invalid PAGING TYPE 2 message . 154
8.1.12 Security mode control . 154
8.1.12.1 General . 154
8.1.12.2 Initiation . 155
8.1.12.2.1 Ciphering configuration change . 155
8.1.12.2.2 Integrity protection configuration change. 156
8.1.12.3 Reception of SECURITY MODE COMMAND message by the UE . 157
8.1.12.3.1 New ciphering and integrity protection keys .
...