3GPP TS 38.331 V15.0.0 (2017-12)
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`Technical Specification
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`3rd Generation Partnership Project;
`Technical Specification Group Radio Access Network
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`Radio Resource Control (RRC) protocol specification
`(Release 15)
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`The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP..
`The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented.
`This Specification is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification.
`Specifications and Reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.
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`3GPP TS 38.331 V15.0.0 (2017-12)
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`Release 15
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`3GPP
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`Postal address
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`3GPP support office address
`650 Route des Lucioles - Sophia Antipolis
`Valbonne - FRANCE
`Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
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`Internet
`http://www.3gpp.org
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`Copyright Notification
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`No part may be reproduced except as authorized by written permission.
`The copyright and the foregoing restriction extend to reproduction in all media.
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`© 2017, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
`All rights reserved.
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`UMTS™ is a Trade Mark of ETSI registered for the benefit of its members
`3GPP™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
`LTE™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
`GSM® and the GSM logo are registered and owned by the GSM Association
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`3GPP
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`Release 15
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`3
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`3GPP TS 38.331 V15.0.0 (2017-12)
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`Contents
`Foreword ...................................................................................................................................................... 8
`1
`Scope .................................................................................................................................................. 9
`2
`References .......................................................................................................................................... 9
`3
`Definitions, symbols and abbreviations ............................................................................................. 10
`3.1
`Definitions ................................................................................................................................................. 10
`3.2
`Abbreviations............................................................................................................................................. 10
`4
`General ............................................................................................................................................. 11
`4.1
`Introduction ............................................................................................................................................... 11
`4.2
`Architecture ............................................................................................................................................... 12
`4.2.1
`UE states and state transitions including inter RAT................................................................................ 12
`4.2.2
`Signalling radio bearers ........................................................................................................................ 14
`4.3
`Services ..................................................................................................................................................... 14
`4.3.1
`Services provided to upper layers .......................................................................................................... 14
`4.3.2
`Services expected from lower layers...................................................................................................... 14
`4.4
`Functions ................................................................................................................................................... 14
`5
`Procedures ........................................................................................................................................ 15
`5.1
`General ...................................................................................................................................................... 15
`5.1.1
`Introduction .......................................................................................................................................... 15
`5.1.2
`General requirements ............................................................................................................................ 16
`5.2
`System information .................................................................................................................................... 16
`5.2.1
`Introduction .......................................................................................................................................... 16
`5.2.2
`System information acquisition ............................................................................................................. 17
`5.2.2.1
`General UE requirements................................................................................................................. 17
`5.2.2.2
`SI validity and need to (re)-acquire SI .............................................................................................. 17
`5.2.2.2.1
`SI validity .................................................................................................................................. 18
`5.2.2.2.2
`SI change indication and PWS notification ................................................................................. 18
`5.2.2.3
`Acquisition of System Information .................................................................................................. 18
`5.2.2.3.1
`Acquisition of MIB and SIB1 ..................................................................................................... 18
`5.2.2.3.2
`Acquisition of an SI message...................................................................................................... 19
`5.2.2.3.3
`Request for on demand system information ................................................................................ 20
`5.2.2.4
` Actions upon receipt of SI message................................................................................................. 20
`5.2.2.4.1
`Actions upon reception of the MasterInformationBlock .............................................................. 20
`5.2.2.4.2
`Actions upon reception of the SystemInformationBlockType1 .................................................... 21
`5.2.2.4.3
`Actions upon reception of SystemInformationBlockTypeX ......................................................... 21
`5.2.2.5
`Essential system information missing............................................................................................... 21
`5.3
`Connection control ..................................................................................................................................... 21
`5.3.1
`Introduction .......................................................................................................................................... 22
`5.3.2
`Paging .................................................................................................................................................. 22
`5.3.3
`RRC connection establishment .............................................................................................................. 22
`5.3.4
`Initial security activation ....................................................................................................................... 22
`5.3.5
`RRC reconfiguration ............................................................................................................................. 22
`5.3.5.1
`General ........................................................................................................................................... 22
`5.3.5.2
`Initiation ......................................................................................................................................... 23
`5.3.5.3
`Reception of an RRCReconfiguration by the UE .............................................................................. 23
`5.3.5.4
`Secondary cell group release ............................................................................................................ 24
`5.3.5.5
`Cell Group configuration ................................................................................................................. 24
`5.3.5.5.1
`General ...................................................................................................................................... 24
`5.3.5.5.2
`Reconfiguration with sync .......................................................................................................... 25
`5.3.5.5.3
`RLC bearer release ..................................................................................................................... 26
`5.3.5.5.4
`RLC bearer addition/modification .............................................................................................. 26
`5.3.5.5.5
`MAC entity configuration .......................................................................................................... 27
`5.3.5.5.6
`RLF Timers & Constants configuration ...................................................................................... 27
`5.3.5.5.7
`SpCell Configuration ................................................................................................................. 27
`5.3.5.5.8
`SCell Release ............................................................................................................................. 27
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`Release 15
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`5.3.5.5.9
`5.3.5.6
`5.3.5.6.1
`5.3.5.6.2
`5.3.5.6.3
`5.3.5.6.4
`5.3.5.6.5
`5.3.5.7
`5.3.5.9
`5.3.5.9.1
`5.3.5.9.2
`5.3.5.9.3
`5.3.6
`5.3.7
`5.3.8
`5.3.9
`5.3.10
`5.3.11
`5.3.11.1
`5.3.11.2
`5.3.11.3
`5.3.12
`5.3.13
`5.4
`5.5
`5.5.1
`5.5.2
`5.5.2.1
`5.5.2.2
`5.5.2.3
`5.5.2.4
`5.5.2.5
`5.5.2.6
`5.5.2.7
`5.5.2.8
`5.5.2.9
`5.5.2.10
`5.5.3
`5.5.3.1
`5.5.3.2
`5.5.3.3
`5.5.4
`5.5.4.1
`5.5.4.2
`5.5.4.3
`5.5.4.4
`5.5.4.5
`5.5.4.6
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`5.5.4.7
`5.5.5
`5.5.5.1
`5.5.5.2
`5.6
`5.6.1
`5.7
`5.7.1
`5.7.2
`5.7.3
`5.7.3.1
`5.7.3.2
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`4
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`3GPP TS 38.331 V15.0.0 (2017-12)
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`SCell Addition/Modification ...................................................................................................... 27
`Radio Bearer configuration .............................................................................................................. 28
`General ...................................................................................................................................... 28
`SRB release ............................................................................................................................... 28
`SRB addition/ modification ........................................................................................................ 28
`DRB release ............................................................................................................................... 29
`DRB addition/ modification ....................................................................................................... 29
`Full configuration ............................................................................................................................ 30
`Reconfiguration failure .................................................................................................................... 32
`Integrity check failure ................................................................................................................ 32
`Inability to comply with RRCReconfiguration ............................................................................ 32
`T304 expiry (Reconfiguration with sync Failure) ........................................................................ 32
`Counter check ....................................................................................................................................... 33
`RRC connection re-establishment.......................................................................................................... 33
`RRC connection release ........................................................................................................................ 33
`RRC connection release requested by upper layers ................................................................................ 33
`Radio resource configuration ................................................................................................................ 33
`Radio link failure related actions ........................................................................................................... 33
`Detection of physical layer problems in RRC_CONNECTED .......................................................... 33
`Recovery of physical layer problems................................................................................................ 33
`Detection of radio link failure .......................................................................................................... 34
`UE actions upon leaving RRC_CONNECTED ...................................................................................... 34
`UE actions upon PUCCH/SRS release request ....................................................................................... 35
`Inter-RAT mobility .................................................................................................................................... 35
`Measurements ............................................................................................................................................ 35
`Introduction .......................................................................................................................................... 35
`Measurement configuration ................................................................................................................... 37
`General ........................................................................................................................................... 37
`Measurement identity removal ......................................................................................................... 38
`Measurement identity addition/ modification ................................................................................... 38
`Measurement object removal ........................................................................................................... 38
`Measurement object addition/ modification ...................................................................................... 39
`Reporting configuration removal ..................................................................................................... 40
`Reporting configuration addition/ modification ................................................................................ 40
`Quantity configuration ..................................................................................................................... 41
`Measurement gap configuration ....................................................................................................... 41
`Reference signal measurement timing configuration ......................................................................... 41
`Performing measurements ..................................................................................................................... 41
`General ........................................................................................................................................... 41
`Layer 3 filtering .............................................................................................................................. 43
`Derivation of measurement results ................................................................................................... 43
`Measurement report triggering .............................................................................................................. 44
`General ........................................................................................................................................... 44
`Event A1 (Serving becomes better than threshold) ........................................................................... 46
`Event A2 (Serving becomes worse than threshold) ........................................................................... 46
`Event A3 (Neighbour becomes offset better than PCell/ PSCell) ...................................................... 47
`Event A4 (Neighbour becomes better than threshold) ....................................................................... 47
`Event A5 (PCell/ PSCell becomes worse than threshold1 and neighbour becomes better than
`threshold2) ...................................................................................................................................... 48
`Event A6 (Neighbour becomes offset better than SCell) ................................................................... 49
`Measurement reporting ......................................................................................................................... 50
`General ........................................................................................................................................... 50
`Reporting of beam measurement information ................................................................................... 52
`UE capabilities ........................................................................................................................................... 52
`UE capability transfer ........................................................................................................................... 52
`Other ......................................................................................................................................................... 53
`DL information transfer ........................................................................................................................ 53
`UL information transfer ........................................................................................................................ 53
`SCG failure information ........................................................................................................................ 53
`General ........................................................................................................................................... 53
`Initiation ......................................................................................................................................... 54
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`3GPP TS 38.331 V15.0.0 (2017-12)
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`Release 15
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`Failure type determination ............................................................................................................... 54
`5.7.3.3
`Setting the contents of FailureReportSCG-ToOtherRAT ................................................................... 55
`5.7.3.4
`6
`Protocol data units, formats and parameters (ASN.1) ......................................................................... 56
`6.1
`General ...................................................................................................................................................... 56
`6.1.1
`Introduction .......................................................................................................................................... 56
`6.1.2
`Need codes for optional downlink fields ................................................................................................ 56
`6.2
`RRC messages ........................................................................................................................................... 57
`6.2.1
`General message structure ..................................................................................................................... 57
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`NR-RRC-Definitions ........................................................................................................................ 57
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`BCCH-BCH-Message ...................................................................................................................... 58
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`DL-DCCH-Message ........................................................................................................................ 58
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`UL-DCCH-Message ........................................................................................................................ 59
`6.2.2
`Message definitions .............................................................................................................................. 59
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`MIB................................................................................................................................................. 59
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`MeasurementReport ........................................................................................................................ 61
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`RRCReconfiguration........................................................................................................................ 61
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`RRCReconfigurationComplete ......................................................................................................... 63
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`SIB1 ................................................................................................................................................ 64
`6.3
`RRC information elements ......................................................................................................................... 65
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`SetupRelease Information Element ................................................................................................... 65
`6.3.1
`System information blocks .................................................................................................................... 65
`6.3.2
`Radio resource control information elements ......................................................................................... 65
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`DRB-Identity ................................................................................................................................... 65
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`BandwidthPart-Config..................................................................................................................... 66
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`CellGroupConfig ............................................................................................................................. 67
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`CellIndexList ................................................................................................................................... 69
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`ControlResourceIndex ..................................................................................................................... 70
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`CrossCarrierSchedulingConfig ........................................................................................................ 70
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`CSI-MeasConfig .............................................................................................................................. 71
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`FailureReportSCG-ToOtherRAT ...................................................................................................... 78
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`FrequencyInfoUL ............................................................................................................................ 79
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`LogicalChannelConfig..................................................................................................................... 80
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`MAC-CellGroupConfig.................................................................................................................... 81
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`MeasConfig ..................................................................................................................................... 86
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`MeasId ............................................................................................................................................ 87
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`MeasIdToAddModList ..................................................................................................................... 88
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`MeasObjectEUTRA ......................................................................................................................... 88
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`MeasObjectId .................................................................................................................................. 88
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`MeasObjectNR ................................................................................................................................ 89
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`MeasObjectToAddModList .............................................................................................................. 94
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`MeasResults .................................................................................................................................... 95
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`PDCCH-Config ............................................................................................................................... 99
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`PDCP-Config ................................................................................................................................ 102
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`PDSCH-Config ............................................................................................................................. 106
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`PhysCellId .................................................................................................................................... 109
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`PUCCH-Config ............................................................................................................................. 109
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`PUSCH-Config ............................................................................................................................. 112
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`Q-OffsetRange............................................................................................................................... 115
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`QuantityConfig .............................................................................................................................. 115
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`RACH-ConfigCommon .................................................................................................................. 116
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`RACH-ConfigDedicated ................................................................................................................ 118
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`RadioBearerConfig ....................................................................................................................... 119
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`ReportConfigId ............................................................................................................................. 121
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`ReportConfigNR ............................................................................................................................ 121
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`ReportConfigToAddModList .......................................................................................................... 125
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`RLC-Config ................................................................................................................................... 126
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`RLF-TimersAndConstants.............................................................................................................. 128
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`SCellIndex ..................................................................................................................................... 129
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`SchedulingRequest-Config ............................................................................................................. 129
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`SchedulingRequestResource-Config ............................................................................................... 130
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`SDAP-Config ................................................................................................................................ 130
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`3GPP TS 38.331 V15.0.0 (2017-12)
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`Release 15
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`SecurityAlgorithmConfig ............................................................................................................... 131
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`ServCellIndex ................................................................................................................................ 132
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`ServingCellConfigCommon ........................................................................................................... 133
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`ServingCellConfigDedicated.......................................................................................................... 135
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`SRB-Identity .................................................................................................................................. 137
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`SPS-Config .................................................................................................................................... 137
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`SRS-Config .................................................................................................................................... 138
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`SubcarrierSpacing ......................................................................................................................... 140
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`UE capability information elements .................................................................................................... 141
`6.3.3
`BandCombinationList .................................................................................................................... 141
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`RAT-Type ...................................................................................................................................... 141
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`UE-CapabilityRAT-ContainerList .................................................................................................. 142
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`UE-MRDC-Capability ................................................................................................................... 142
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`UE-NR-Capability ......................................................................................................................... 143
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`Other information elements ................................................................................................................. 146
`6.3.4
`RRC multiplicity and type constraint values ............................................................................................. 146
`6.4
`Multiplicity and type constraint definitions .......................................................................................... 146
`–
`Variables and constants ................................................................................................................... 148
`7
`Timers ..................................................................................................................................................... 148
`7.1
`Timers (Informative)........................................................................................................................... 148
`7.1.1
`Timer handling ................................................................................................................................... 148
`7.1.2
`Counters .................................................................................................................................................. 148
`7.2
`Constants ................................................................................................................................................. 148
`7.3
`UE variables ............................................................................................................................................ 149
`7.4
`VarMeasConfig ............................................................................................................................. 149
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`VarMeasReportList ....................................................................................................................... 149
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`Protocol data unit abstract syntax .................................................................................................... 151
`8
`General .................................................................................................................................................... 151
`8.1
`Structure of encoded RRC messages ...........................................................................