LTE 5G-NR Dual Connectivity Non-Standalone Access Signaling Messages

This document details messages involved in the 5G non-standalone access attach and bearer setup procedure. These messages are referenced from the 5G Non-Standalone Access Sequence Diagrams.

Message Path
LTE SIB2
PLMN-InfoList-r15
MN-eNB ➔ UE
LTE Preamble UE ➔ MN-eNB
PDCCH DCI Format 1A
Format 1A - CRC Scrambled with RA-RNTI
MN-eNB ➔ UE
LTE Random Access Response
LTE MAC PDU
 └LTE MAC Payload for Random Access Response
  └LTE RAR UL Grant
MN-eNB ➔ UE
RRC Connection Request UE ➔ MN-eNB
PDCCH DCI Format 1A
Format 1A - CRC Scrambled with C-RNTI
MN-eNB ➔ UE
RRC Connection Setup MN-eNB ➔ UE
PDCCH DCI Format 0
Format 0 - CRC Scrambled with C-RNTI
MN-eNB ➔ UE
RRC Connection Setup Complete
Attach Request
PDN Connectivity Request
UE ➔ MN-eNB
Initial UE Message
Attach Request
PDN Connectivity Request
MN-eNB ➔ MME
Authentication Request MME ➔ UE
Authentication Response UE ➔ MME
NAS Security Mode Command MME ➔ UE
NAS Security Mode Complete UE ➔ MME
Initial Context Setup Request
Attach Accept
 └Activate Default EPS Bearer Context Request
MME ➔ MN-eNB
UE Capability Enquiry MN-eNB ➔ UE
UE Capability Information
UE-MRDC-Capability
SupportedBandListNR-r15
UE ➔ MN-eNB
UE Capability Info Indication MN-eNB ➔ MME
AS Security Mode Command MN-eNB ➔ UE
AS Security Mode Complete UE ➔ MN-eNB
RRC Connection Reconfiguration
Attach Accept
 └Activate Default EPS Bearer Context Request
MeasConfig
 └MeasObjectToAddModList
  └MeasObjectNR-r15
MN-eNB ➔ UE
RRC Connection Reconfiguration Complete UE ➔ MN-eNB
Attach Complete
Activate Default EPS Bearer Accept
UE ➔ MME
Measurement Report
MeasResults
UE ➔ MN-eNB
SgNB Addition Request MN-eNB ➔ SN-gNB
SgNB Addition Request Acknowledge
CG-Config
SN-gNB ➔ MN-eNB
RRC Connection Reconfiguration for 5G-NR Bearer
CG-Config
MN-eNB ➔ UE
RRC Connection Reconfiguration Complete for 5G-NR Bearer
NR RRCReconfigurationComplete
UE ➔ MN-eNB
SgNB Reconfiguration Complete
NR RRCReconfigurationComplete
MN-eNB ➔ SN-gNB
SN Status Transfer MN-eNB ➔ SN-gNB
NR PSS SN-gNB ➔ UE
NR SSS SN-gNB ➔ UE
NR PBCH (MIB) SN-gNB ➔ UE
NR Preamble UE ➔ SN-gNB
NR PDCCH DCI Format 1_0
Format 1_0 - CRC Scrambled with RA-RNTI
SN-gNB ➔ UE
NR Random Access Response
MAC PDU
 └MAC Payload for Random Access Response
  └RAR UL Grant
SN-gNB ➔ UE
PDCCH DCI Format 1_0
Format 1_0 - CRC Scrambled with C-RNTI
SN-gNB ➔ UE
NR MAC PDU SN-gNB ➔ UE
PDCCH DCI Format 0_0
Format 0_0 - CRC Scrambled with C-RNTI
SN-gNB ➔ UE
NR MAC PDU UE ➔ SN-gNB
Dual Connectivity PHR MAC CE UE ➔ MN-eNB
Measurement Report
MeasResults
UE ➔ MN-eNB
RRC Transfer MN-eNB ➔ SN-gNB
Secondary RAT Data Usage Report
Secondary RAT Usage Report list
SN-gNB ➔ MN-eNB
gNB Status Indication SN-gNB ➔ MN-eNB

LTE SIB2

MN-eNB ➔ UE

TS 36.331

The SIB2 broadcast from the eNB signals the presence of 5G-NR PLMNs via the PLMN-InfoList-r15.

SystemInformationBlockType2 ::= SEQUENCE { ac-BarringInfo SEQUENCE { ac-BarringForEmergency BOOLEAN, ac-BarringForMO-Signalling AC-BarringConfig OPTIONAL, -- Need OP ac-BarringForMO-Data AC-BarringConfig OPTIONAL -- Need OP } OPTIONAL, -- Need OP radioResourceConfigCommon RadioResourceConfigCommonSIB, ue-TimersAndConstants UE-TimersAndConstants, freqInfo SEQUENCE { ul-CarrierFreq ARFCN-ValueEUTRA OPTIONAL, -- Need OP ul-Bandwidth ENUMERATED {n6, n15, n25, n50, n75, n100} additionalSpectrumEmission AdditionalSpectrumEmission }, mbsfn-SubframeConfigList MBSFN-SubframeConfigList OPTIONAL, -- Need OR timeAlignmentTimerCommon TimeAlignmentTimer, ..., lateNonCriticalExtension OCTET STRING (CONTAINING SystemInformationBlockType2-v8h0-IEs) OPTIONAL, [[ ssac-BarringForMMTEL-Voice-r9 AC-BarringConfig OPTIONAL, -- Need OP ssac-BarringForMMTEL-Video-r9 AC-BarringConfig OPTIONAL -- Need OP ]], [[ ac-BarringForCSFB-r10 AC-BarringConfig OPTIONAL -- Need OP ]], [[ ac-BarringSkipForMMTELVoice-r12 ENUMERATED {true} OPTIONAL, -- Need OP ac-BarringSkipForMMTELVideo-r12 ENUMERATED {true} OPTIONAL, -- Need OP ac-BarringSkipForSMS-r12 ENUMERATED {true} OPTIONAL, -- Need OP ac-BarringPerPLMN-List-r12 AC-BarringPerPLMN-List-r12 OPTIONAL -- Need OP ]], [[ voiceServiceCauseIndication-r12 ENUMERATED {true} OPTIONAL -- Need OP ]], [[ acdc-BarringForCommon-r13 ACDC-BarringForCommon-r13 OPTIONAL, -- Need OP acdc-BarringPerPLMN-List-r13 ACDC-BarringPerPLMN-List-r13 OPTIONAL -- Need OP ]], [[ udt-RestrictingForCommon-r13 UDT-Restricting-r13 OPTIONAL, -- Need OR udt-RestrictingPerPLMN-List-r13 UDT-RestrictingPerPLMN-List-r13 OPTIONAL, -- Need OR cIoT-EPS-OptimisationInfo-r13 CIOT-EPS-OptimisationInfo-r13 OPTIONAL, -- Need OP useFullResumeID-r13 ENUMERATED {true} OPTIONAL -- Need OP ]], [[ unicastFreqHoppingInd-r13 ENUMERATED {true} OPTIONAL -- Need OP ]], [[ mbsfn-SubframeConfigList-v1430 MBSFN-SubframeConfigList-v1430 OPTIONAL, -- Need OP videoServiceCauseIndication-r14 ENUMERATED {true} OPTIONAL -- Need OP ]], [[ plmn-InfoList-r15 PLMN-InfoList-r15 OPTIONAL -- Need OP ]], [[ cp-EDT-r15 ENUMERATED {true} OPTIONAL, -- Need OR up-EDT-r15 ENUMERATED {true} OPTIONAL, -- Need OR idleModeMeasurements-r15 ENUMERATED {true} OPTIONAL, -- Need OR reducedCP-LatencyEnabled-r15 ENUMERATED {true} OPTIONAL -- Need OR ]], [[ mbms-ROM-ServiceIndication-r15 ENUMERATED {true} OPTIONAL -- Need OR ]] }

PLMN-InfoList-r15

Presence of PLMN-InfoList-r15 signals that PLMNs supporting 5G-NR services are available.

PLMN-InfoList-r15 ::= SEQUENCE (SIZE (1..maxPLMN-r11)) OF PLMN-Info-r15 PLMN-Info-r15 ::= SEQUENCE { upperLayerIndication-r15 ENUMERATED {true} OPTIONAL -- Need OR }

LTE Preamble

UE ➔ MN-eNB

TS 36.213, TS 36.321, TS 36.211

The UE picks a random preamble. The preamble is referenced with the Random Access Preamble Id (RAPID). The preamble transmission is a Zadoff-Chu sequence.

Each preamble transmission is associated with an RA-RNTI.

LTE RA-RNTI

The RA-RNTI associated with the PRACH in which the Random Access Preamble is transmitted, is computed as:

RA-RNTI= 1 + t_id + 10 × f_id

Where:

Identifier Description
t_id The index of the first subframe of the specified PRACH (0≤ t_id <10)
f_id The index of the specified PRACH within that subframe, in ascending order of frequency domain (0≤ f_id< 6)

PDCCH DCI Format 1A

MN-eNB ➔ UE

TS 36.212

DCI Format 1_0 is used to assign downlink resources.

Format 1A - CRC Scrambled with RA-RNTI

In response to a PRACH transmission, a UE attempts to detect a DCI Format 1A with PDCCH CRC scrambled by the RA-RNTI corresponding to the RACH transmission. The UE looks for message during a configured window of length ra-ResponseWindow.

The RA-RNTI scrambled DCI message signals the frequency and time resources assigned for the transmission of the Transport Block containing the Random Access Response message.

The following information is transmitted by means of the RA-RNTI scrambled DCI Format 1A:

Field Bits
Carrier Indicator 0 or 3
Format Discriminator 1 (should be 1 for Format 1A)
Localized/Distributed VRB assignment flag 1 (should be set to 0 for random access)
Resource block assignment ⌈log2(NRBDL(NRBDL + 1)/2)⌉
NRBDL is the system bandwidth expressed in RBs
Preamble Index 6
PRACH Mask Index 4

Format 1A - CRC Scrambled with C-RNTI

The following information is transmitted by a DCI Format 1A with PDCCH CRC scrambled by the assigned C-RNTI:

Field Bits
Carrier Indicator 0 or 3
Format Discriminator 1 (should be 1 for Format 1A)
Localized/Distributed VRB assignment flag 1
Resource block assignment ⌈log2(NRBDL(NRBDL + 1)/2)⌉
NRBDL is the system bandwidth expressed in RBs

LTE Random Access Response

MN-eNB ➔ UE

TS 36.213, TS 36.321

  1. The UE listens on the PDCCH addressed by the RA-RNTI.
  2. Once the PDCCH with the RA-RNTI is decoded, the UE uses the RB resources in the message to receive the downlink transport block.
  3. The downlink transport block contains the MAC PDU.

LTE MAC PDU

Field Description
LTE MAC Header MAC header containing subheaders for each MAC PDU
LTE MAC Random Access Response 1 Random access response for UE 1
LTE MAC Random Access Response 2 Random access response for UE 2
LTE MAC Random Access Response ... Random access response for UE ...
LTE MAC Random Access Response n

LTE MAC Header

MAC subheader 1 bit 1 bit 6-bit
MAC subheader 1 E T RAPID 1
MAC subheader 2 E T RAPID 2
MAC subheader 3 E T RAPID 3

LTE MAC Payload for Random Access Response

Field Description Bits
R Reserved bit (set to "0") 1
Timing Advance Command The Timing Advance Command field indicates the index value TA used to control the amount of timing adjustment that the MAC entity must apply in TS 36.213. 11
LTE RAR UL Grant The Uplink Grant field indicates the resources to be used on the uplink in TS 36.213 20
Temporary C-RNTI The Temporary C-RNTI field indicates the temporary identity that is used by the MAC entity during Random Access. 16

LTE RAR UL Grant

RAR grant field Number of bits
Hopping flag 1
Fixed size resource block assignment 10
Truncated modulation and coding scheme 4
TPC command for scheduled PUSCH 3
UL Delay 1
CSI request 1

RRC Connection Request

UE ➔ MN-eNB

TS 36.331

RRCConnectionRequest ::= SEQUENCE { criticalExtensions CHOICE { rrcConnectionRequest-r8 RRCConnectionRequest-r8-IEs, rrcConnectionRequest-r15 RRCConnectionRequest-5GC-r15-IEs } } RRCConnectionRequest-r8-IEs ::= SEQUENCE { ue-Identity InitialUE-Identity, establishmentCause EstablishmentCause, spare BIT STRING (SIZE (1)) } RRCConnectionRequest-5GC-r15-IEs ::= SEQUENCE { ue-Identity InitialUE-Identity-5GC, establishmentCause EstablishmentCause-5GC, spare BIT STRING (SIZE (1)) } InitialUE-Identity ::= CHOICE { s-TMSI S-TMSI, randomValue BIT STRING (SIZE (40)) } InitialUE-Identity-5GC ::= CHOICE { ng-5G-S-TMSI-Part1 BIT STRING (SIZE (40)), randomValue BIT STRING (SIZE (40)) } EstablishmentCause ::= ENUMERATED { emergency, highPriorityAccess, mt-Access, mo-Signalling, mo-Data, delayTolerantAccess-v1020, mo-VoiceCall-v1280, spare1} EstablishmentCause-5GC ::= ENUMERATED { emergency, highPriorityAccess, mt-Access, mo-Signalling, mo-Data, mo-VoiceCall, spare2, spare1}

RRC Connection Setup

MN-eNB ➔ UE

TS 36.331

RRCConnectionSetup ::=SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE { rrcConnectionSetup-r8RRCConnectionSetup-r8-IEs, spare7 NULL, spare6 NULL, spare5 NULL, spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionSetup-r8-IEs ::= SEQUENCE { radioResourceConfigDedicated RadioResourceConfigDedicated, nonCriticalExtensionRRCConnectionSetup-v8a0-IEs OPTIONAL } RRCConnectionSetup-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtensionSEQUENCE {} OPTIONAL }

PDCCH DCI Format 0

MN-eNB ➔ UE

TS 36.212

DCI Format 0 is used to assign uplink resources to the UE.

Format 0 - CRC Scrambled with C-RNTI

The following information is transmitted by a DCI Format 0 with PDCCH CRC scrambled by the assigned C-RNTI:

Field Bits
Carrier indicator 0 or 3
Identifier of DCI formats 1
Frequency hopping flag 1
Resource block assignment ⌈log2(NRBUL(NRBUL + 1)/2)⌉
NRBUL is the size of the uplink bandwidth expressed in RBs.
PUSCH 2
Modulation and coding scheme and redundancy version 5
New data indicator 1
HARQ process number 3
TPC command for scheduled PUSCH 2
Cyclic shift for DM RS 3
CSI Request 1 or 2
SRS Request 0 or 1

RRC Connection Setup Complete

UE ➔ MN-eNB

TS 36.331

The message also carries:

RRCConnectionSetupComplete ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ rrcConnectionSetupComplete-r8 RRCConnectionSetupComplete-r8-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionSetupComplete-r8-IEs ::= SEQUENCE { selectedPLMN-Identity INTEGER (1..maxPLMN-r11), registeredMME RegisteredMME OPTIONAL, dedicatedInfoNAS DedicatedInfoNAS, nonCriticalExtension RRCConnectionSetupComplete-v8a0-IEs OPTIONAL } RRCConnectionSetupComplete-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1020-IEs OPTIONAL } RRCConnectionSetupComplete-v1020-IEs ::= SEQUENCE { gummei-Type-r10 ENUMERATED {native, mapped} OPTIONAL, rlf-InfoAvailable-r10 ENUMERATED {true} OPTIONAL, logMeasAvailable-r10 ENUMERATED {true} OPTIONAL, rn-SubframeConfigReq-r10 ENUMERATED {required, notRequired} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1130-IEs OPTIONAL } RRCConnectionSetupComplete-v1130-IEs ::= SEQUENCE { connEstFailInfoAvailable-r11 ENUMERATED {true} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1250-IEs OPTIONAL } RRCConnectionSetupComplete-v1250-IEs ::= SEQUENCE { mobilityState-r12 ENUMERATED {normal, medium, high, spare} OPTIONAL, mobilityHistoryAvail-r12 ENUMERATED {true} OPTIONAL, logMeasAvailableMBSFN-r12 ENUMERATED {true} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1320-IEs OPTIONAL } RRCConnectionSetupComplete-v1320-IEs ::= SEQUENCE { ce-ModeB-r13 ENUMERATED {supported} OPTIONAL, s-TMSI-r13 S-TMSI OPTIONAL, attachWithoutPDN-Connectivity-r13 ENUMERATED {true} OPTIONAL, up-CIoT-EPS-Optimisation-r13 ENUMERATED {true} OPTIONAL, cp-CIoT-EPS-Optimisation-r13 ENUMERATED {true} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1330-IEs OPTIONAL } RRCConnectionSetupComplete-v1330-IEs ::= SEQUENCE { ue-CE-NeedULGaps-r13 ENUMERATED {true} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1430-IEs OPTIONAL } RRCConnectionSetupComplete-v1430-IEs ::= SEQUENCE { dcn-ID-r14 INTEGER (0..65535) OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1530-IEs OPTIONAL } RRCConnectionSetupComplete-v1530-IEs ::= SEQUENCE { logMeasAvailableBT-r15 ENUMERATED {true} OPTIONAL, logMeasAvailableWLAN-r15 ENUMERATED {true} OPTIONAL, idleMeasAvailable-r15 ENUMERATED {true} OPTIONAL, flightPathInfoAvailable-r15 ENUMERATED {true} OPTIONAL, connectTo5GC-r15 ENUMERATED {true} OPTIONAL, registeredAMF-r15 RegisteredAMF-r15 OPTIONAL, s-NSSAI-list-r15 SEQUENCE(SIZE (1..maxNrofS-NSSAI-r15)) OF S-NSSAI-r15 OPTIONAL, ng-5G-S-TMSI-Bits-r15 CHOICE { ng-5G-S-TMSI-r15 NG-5G-S-TMSI-r15, ng-5G-S-TMSI-Part2-r15 BIT STRING (SIZE (8)) } OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1540-IEs OPTIONAL } RRCConnectionSetupComplete-v1540-IEs ::= SEQUENCE { gummei-Type-v1540 ENUMERATED {mappedFrom5G} OPTIONAL, guami-Type-r15 ENUMERATED {native, mapped} OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL } RegisteredMME ::= SEQUENCE { plmn-Identity PLMN-Identity OPTIONAL, mmegi BIT STRING (SIZE (16)), mmec MMEC } RegisteredAMF-r15 ::= SEQUENCE { plmn-Identity-r15 PLMN-Identity OPTIONAL, amf-Identifier-r15 AMF-Identifier-r15 }

Attach Request

UE ➔ MME

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Attach request message identity Message type M
EPS attach type EPS attach type M
NAS key set identifier NAS key set identifier M
EPS mobile identity EPS mobile identity M
UE network capability UE network capability M
ESM message container - PDN Connectivity Request ESM message container M
Old P-TMSI signature P-TMSI signature O
Additional GUTI EPS mobile identity O
Last visited registered TAI Tracking area identity O
DRX parameter DRX parameter O
MS network capability MS network capability O
Old location area identification Location area identification O
TMSI status TMSI status O
Mobile station classmark 2 Mobile station classmark 2 O
Mobile station classmark 3 Mobile station classmark 3 O
Supported Codecs Supported Codec List O
Additional update type Additional update type O
Voice domain preference and UE's usage setting Voice domain preference and UE's usage setting O
Device properties Device properties O
Old GUTI type GUTI type O
MS network feature support MS network feature support O
TMSI based NRI container Network resource identifier container O
T3324 value GPRS timer 2 O
T3412 extended value GPRS timer 3 O
Extended DRX parameters Extended DRX parameters O
UE additional security capability UE additional security capability O
UE status UE status O
Additional information requested Additional information requested O

UE Network Capability

TS 24.301

UE sets the DCNR bit in octet 9 to signal that it supports EN-DC dual connectivity

Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
EEA0 128-EEA1 128-EEA2 128-EEA3 EEA4 EEA5 EEA6 EEA7 octet 3
EIA0 128-EIA1 128-EIA2 128-EIA3 EIA4 EIA5 EIA6 EIA7 octet 4
UEA0 UEA1 UEA2 UEA3 UEA4 UEA5 UEA6 UEA7 octet 5
UCS2 UIA1 UIA2 UIA3 UIA4 UIA5 UIA6 UIA7 octet 6
ProSe-dd ProSe H.245-ASH ACC-CSFB LPP LCS 1xSRVCC NF octet 7
ePCO HC-CP CIoT ERw/oPDN S1-U data UP CIoT CP CIoT Prose-relay ProSe-dc octet 8
15 bearers SGC N1mode DCNR CP backoff RestrictEC V2X PC5 multipleDRB octet 9

PDN Connectivity Request

UE ➔ MME

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
EPS bearer identity EPS bearer identity M
Procedure transaction identity Procedure transaction identity M
PDN connectivity request message identity Message type M
Request type Request type M
PDN type PDN type M
ESM information transfer flag ESM information transfer flag O
Access point name Access point name O
Protocol configuration options Protocol configuration options O
Device properties Device properties O
NBIFOM container NBIFOM container O
Header compression configuration Header compression configuration O
Extended protocol configuration options Extended protocol configuration options O

Initial UE Message

MN-eNB ➔ MME

TS 36.413

IE/Group Name Presence Description
Message Type M
eNB UE S1AP ID M
NAS-PDU - Attach Request M
TAI M Indicating the Tracking Area from which the UE has sent the NAS message.
E-UTRAN CGI M Indicating the E-UTRAN CGI from which the UE has sent the NAS
RRC Establishment Cause M
S-TMSI O
CSG Id O
GUMMEI O
Cell Access Mode O
GW Transport Layer Address O Indicating GW Transport Layer Address if the GW is collocated with eNB.
Relay Node Indicator O Indicating a relay node.
GUMMEI Type O
Tunnel Information for BBF O Indicating HeNB’s Local IP Address assigned by the
SIPTO L-GW Transport Layer Address O Indicating SIPTO L-GW Transport Layer Address if the SIPTO L-GW is collocated with eNB.
LHN ID O
MME Group ID O
UE Usage Type O
CE-mode-B Support Indicator O
DCN ID O
Coverage Level O
UE Application Layer Measurement Capability O Each bit in the bitmap indicates an UE Application layer measurement capability.
EDT O

Authentication Request

MME ➔ UE

TS 24.301

Information element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Authentication request message type Message type M
NAS key set identifierASME NAS key set identifier M
Spare half octet Spare half octet M
Authentication parameter RAND (EPS challenge) Authentication parameter RAND M
Authentication parameter AUTN (EPS challenge) Authentication parameter M

Authentication Response

UE ➔ MME

TS 24.301

Information element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Authentication response message type Message type M
Authentication response parameter Authentication response parameter M

NAS Security Mode Command

MME ➔ UE

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Security mode command message identity Message type M
Selected NAS security algorithms NAS security algorithms M
NAS key set identifier NAS key set identifier M
Spare half octet Spare half octet M
Replayed UE security capabilities UE security capability M
IMEISV request IMEISV request O
Replayed nonceUE Nonce O
NonceMME Nonce O
HashMME HashMME O
Replayed UE additional security capability UE additional security capability O

NAS Security Mode Complete

UE ➔ MME

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Security mode complete message identity Message type M
IMEISV Mobile identity O
Replayed NAS message container Replayed NAS message container O

Initial Context Setup Request

MME ➔ MN-eNB

TS 36.413

IE/Group Name Presence
Message Type M
MME UE S1AP ID M
eNB UE S1AP ID M
UE Aggregate Maximum Bit Rate M
E-RAB to Be Setup List

E-RAB to Be Setup Item IEs [E-RAB ID]

IE/Group Name Presence
E-RAB ID M
E-RAB Level QoS Parameters M
Transport Layer Address M
GTP-TEID M
NAS-PDU - Attach Accept O
Correlation ID O
SIPTO Correlation ID O
Bearer Type O
IE/Group Name Presence
UE Security Capabilities M
Security Key M
Trace Activation O
Handover Restriction List O
UE Radio Capability O
Subscriber Profile ID for RAT/Frequency priority O
CS Fallback Indicator O
SRVCC Operation Possible O
CSG Membership Status O
Registered LAI O
GUMMEI O
MME UE S1AP ID 2 O
Management Based MDT Allowed O
Management Based MDT PLMN List O
Additional CS Fallback Indicator C-ifCSFBhighpriorit y
Masked IMEISV O
Expected UE Behaviour O
ProSe Authorized O
UE User Plane CIoT Support Indicator O
V2X Services Authorized O
UE Sidelink Aggregate Maximum Bit Rate O
Enhanced Coverage Restricted O
NR UE Security Capabilities O
CE-mode-B Restricted O
Aerial UE subscription information O
Pending Data Indication O
Subscription Based UE Differentiation Information O

Attach Accept

MME ➔ UE

TS 24.301

Information Element Presence
Protocol discriminator M
Security header type M
Attach accept message identity M
EPS attach result M
Spare half octet M
T3412 value M
TAI list M
ESM message container - Activate Default EPS Bearer Context Request M
GUTI O
Location area identification O
MS identity O
EMM cause O
T3402 value O
T3423 value O
Equivalent PLMNs O
Emergency number list O
EPS network feature support O
Additional update result O
T3412 extended value O
T3324 value O
Extended DRX parameters O
DCN-ID O
SMS services status O
Non-3GPP NW provided policies O
T3448 value O
Network policy O
T3447 value O
Extended emergency number list O
Ciphering key data O

Activate Default EPS Bearer Context Request

MME ➔ UE

TS 24.301

Information Element Type Presence
EPS bearer identity EPS bearer identity M
Procedure transaction identity Procedure transaction identity M
Activate default EPS bearer context request message identity Message type M
EPS QoS EPS quality of service M
Access point name Access point name M
PDN address PDN address M
Transaction identifier Transaction identifier O
Negotiated QoS Quality of service O
Negotiated LLC SAPI LLC service access point identifier O
Radio priority Radio priority O
Packet flow Identifier Packet flow Identifier O
APN-AMBR APN aggregate maximum bit rate O
ESM cause ESM cause O
Protocol configuration options Protocol configuration options O
Connectivity type Connectivity type O
WLAN offload indication WLAN offload acceptability O
NBIFOM container NBIFOM container O
Header compression configuration Header compression configuration O
Control plane only indication Control plane only indication O
Extended protocol configuration options Extended protocol configuration options O
Serving PLMN rate control Serving PLMN rate control O
Extended APN-AMBR Extended APN aggregate maximum bit rate O

UE Capability Enquiry

MN-eNB ➔ UE

TS 36.331

UECapabilityEnquiry ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE { ueCapabilityEnquiry-r8 UECapabilityEnquiry-r8-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } UECapabilityEnquiry-r8-IEs ::= SEQUENCE { ue-CapabilityRequest UE-CapabilityRequest, nonCriticalExtension UECapabilityEnquiry-v8a0-IEs OPTIONAL } UE-CapabilityRequest ::= SEQUENCE (SIZE (1..maxRAT-Capabilities)) OF RAT-Type

RAT-Type

The IE RAT-Type is used to indicate the radio access technology (RAT), including E UTRA, of the requested/ transferred UE capabilities. A separate value applies for some EUTRA-NR capabilities that are transferred by a separate UE capability container, used in case of EN-DC.

RAT-Type ::= ENUMERATED { eutra, utra, geran-cs, geran-ps, cdma2000-1XRTT, nr, eutra-nr, spare1, ...}

UE Capability Information

UE ➔ MN-eNB

TS 36.331

The message contains:

UECapabilityInformation ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ ueCapabilityInformation-r8 UECapabilityInformation-r8-IEs, spare7 NULL, spare6 NULL, spare5 NULL, spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } UECapabilityInformation-r8-IEs ::= SEQUENCE { ue-CapabilityRAT-ContainerList UE-CapabilityRAT-ContainerList, nonCriticalExtension UECapabilityInformation-v8a0-IEs OPTIONAL } UE-CapabilityRAT-ContainerList ::=SEQUENCE (SIZE (0..maxRAT-Capabilities)) OF UE-CapabilityRAT-Container UE-CapabilityRAT-Container ::= SEQUENCE { rat-Type RAT-Type, ueCapabilityRAT-Container OCTET STRING }

UE-MRDC-Capability

TS 38.331

UE-MRDC-Capability ::= SEQUENCE { measAndMobParametersMRDC MeasAndMobParametersMRDC OPTIONAL, phy-ParametersMRDC-v1530 Phy-ParametersMRDC OPTIONAL, rf-ParametersMRDC RF-ParametersMRDC, generalParametersMRDC GeneralParametersMRDC-XDD-Diff OPTIONAL, rlc-Parameters RLC-Parameters OPTIONAL, mac-Parameters MAC-Parameters OPTIONAL, phy-Parameters Phy-Parameters, rf-Parameters RF-Parameters, measAndMobParameters MeasAndMobParameters OPTIONAL, fdd-Add-UE-NR-Capabilities UE-NR-CapabilityAddXDD-Mode OPTIONAL, tdd-Add-UE-NR-Capabilities UE-NR-CapabilityAddXDD-Mode OPTIONAL, fr1-Add-UE-NR-Capabilities UE-NR-CapabilityAddFRX-Mode OPTIONAL, fr2-Add-UE-NR-Capabilities UE-NR-CapabilityAddFRX-Mode OPTIONAL, featureSets FeatureSets OPTIONAL, featureSetCombinations SEQUENCE (SIZE (1..maxFeatureSetCombinations)) OF FeatureSetCombination OPTIONAL, lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension UE-NR-Capability-v1530 OPTIONAL } UE-NR-Capability-v1530 ::= SEQUENCE { fdd-Add-UE-NR-Capabilities-v1530 UE-NR-CapabilityAddXDD-Mode-v1530 OPTIONAL, tdd-Add-UE-NR-Capabilities-v1530 UE-NR-CapabilityAddXDD-Mode-v1530 OPTIONAL, dummy ENUMERATED {supported} OPTIONAL, interRAT-Parameters InterRAT-Parameters OPTIONAL, inactiveState ENUMERATED {supported} OPTIONAL, delayBudgetReporting ENUMERATED {supported} OPTIONAL, nonCriticalExtension UE-NR-Capability-1540 OPTIONAL } UE-NR-Capability-1540 ::= SEQUENCE { sdap-Parameters SDAP-Parameters OPTIONAL, overheatingInd ENUMERATED {supported} OPTIONAL, ims-Parameters IMS-Parameters OPTIONAL, fr1-Add-UE-NR-Capabilities-v1540 UE-NR-CapabilityAddFRX-Mode-v1540 OPTIONAL, fr2-Add-UE-NR-Capabilities-v1540 UE-NR-CapabilityAddFRX-Mode-v1540 OPTIONAL, fr1-fr2-Add-UE-NR-Capabilities UE-NR-CapabilityAddFRX-Mode OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL } UE-NR-CapabilityAddXDD-Mode ::= SEQUENCE { phy-ParametersXDD-Diff Phy-ParametersXDD-Diff OPTIONAL, mac-ParametersXDD-Diff MAC-ParametersXDD-Diff OPTIONAL, measAndMobParametersXDD-Diff MeasAndMobParametersXDD-Diff OPTIONAL } UE-NR-CapabilityAddXDD-Mode-v1530 ::= SEQUENCE { eutra-ParametersXDD-Diff EUTRA-ParametersXDD-Diff } UE-NR-CapabilityAddFRX-Mode ::= SEQUENCE { phy-ParametersFRX-Diff Phy-ParametersFRX-Diff OPTIONAL, measAndMobParametersFRX-Diff MeasAndMobParametersFRX-Diff OPTIONAL } UE-NR-CapabilityAddFRX-Mode-v1540 ::= SEQUENCE { ims-ParametersFRX-Diff IMS-ParametersFRX-Diff OPTIONAL }

UE-EUTRA-Capability-v15 IEs

TS 36.331

UE-EUTRA-Capability-v1510-IEs ::= SEQUENCE { irat-ParametersNR-r15 IRAT-ParametersNR-r15 OPTIONAL, featureSetsEUTRA-r15 FeatureSetsEUTRA-r15 OPTIONAL, pdcp-ParametersNR-r15 PDCP-ParametersNR-r15 OPTIONAL, fdd-Add-UE-EUTRA-Capabilities-v1510 UE-EUTRA-CapabilityAddXDD-Mode-v1510 OPTIONAL, tdd-Add-UE-EUTRA-Capabilities-v1510 UE-EUTRA-CapabilityAddXDD-Mode-v1510 OPTIONAL, nonCriticalExtension UE-EUTRA-Capability-v1520-IEs OPTIONAL } UE-EUTRA-Capability-v1520-IEs ::= SEQUENCE { measParameters-v1520 MeasParameters-v1520, nonCriticalExtension UE-EUTRA-Capability-v1530-IEs OPTIONAL } UE-EUTRA-Capability-v1530-IEs ::= SEQUENCE { measParameters-v1530 MeasParameters-v1530 OPTIONAL, otherParameters-v1530 Other-Parameters-v1530 OPTIONAL, neighCellSI-AcquisitionParameters-v1530 NeighCellSI-AcquisitionParameters-v1530 OPTIONAL, mac-Parameters-v1530 MAC-Parameters-v1530 OPTIONAL, phyLayerParameters-v1530 PhyLayerParameters-v1530 OPTIONAL, rf-Parameters-v1530 RF-Parameters-v1530 OPTIONAL, pdcp-Parameters-v1530 PDCP-Parameters-v1530 OPTIONAL, ue-CategoryDL-v1530 INTEGER (22..26) OPTIONAL, ue-BasedNetwPerfMeasParameters-v1530 UE-BasedNetwPerfMeasParameters-v1530 OPTIONAL, rlc-Parameters-v1530 RLC-Parameters-v1530 OPTIONAL, sl-Parameters-v1530 SL-Parameters-v1530 OPTIONAL, extendedNumberOfDRBs-r15 ENUMERATED {supported} OPTIONAL, reducedCP-Latency-r15 ENUMERATED {supported} OPTIONAL, laa-Parameters-v1530 LAA-Parameters-v1530 OPTIONAL, ue-CategoryUL-v1530 INTEGER (22..26) OPTIONAL, fdd-Add-UE-EUTRA-Capabilities-v1530 UE-EUTRA-CapabilityAddXDD-Mode-v1530 OPTIONAL, tdd-Add-UE-EUTRA-Capabilities-v1530 UE-EUTRA-CapabilityAddXDD-Mode-v1530 OPTIONAL, nonCriticalExtension UE-EUTRA-Capability-v1540-IEs OPTIONAL } UE-EUTRA-Capability-v1540-IEs ::= SEQUENCE { phyLayerParameters-v1540 PhyLayerParameters-v1540 OPTIONAL, otherParameters-v1540 Other-Parameters-v1540, fdd-Add-UE-EUTRA-Capabilities-v1540 UE-EUTRA-CapabilityAddXDD-Mode-v1540 OPTIONAL, tdd-Add-UE-EUTRA-Capabilities-v1540 UE-EUTRA-CapabilityAddXDD-Mode-v1540 OPTIONAL, sl-Parameters-v1540 SL-Parameters-v1540 OPTIONAL, irat-ParametersNR-v1540 IRAT-ParametersNR-v1540 OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL }

IRAT-ParametersNR-r15

TS 36.331

IRAT-ParametersNR-r15 ::= SEQUENCE { en-DC-r15 ENUMERATED {supported} OPTIONAL, eventB2-r15 ENUMERATED {supported} OPTIONAL, supportedBandListEN-DC-r15 SupportedBandListNR-r15 OPTIONAL }

SupportedBandListNR-r15

TS 36.331

SupportedBandListNR-r15 ::= SEQUENCE (SIZE (1..maxBandsNR-r15)) OF SupportedBandNR-r15 SupportedBandNR-r15 ::= SEQUENCE { bandNR-r15 FreqBandIndicatorNR-r15 } FreqBandIndicatorNR-r15 ::= INTEGER (1.. maxFBI-NR-r15)

UE Capability Info Indication

MN-eNB ➔ MME

TS 36.431

IE/Group Name Presence
Message Type M
MME UE S1AP ID M
eNB UE S1AP ID M
UE Radio Capability M
UE Radio Capability for Paging O
UE Application Layer Measurement Capability O
LTE-M Indication O

AS Security Mode Command

MN-eNB ➔ UE

TS 36.331

SecurityModeCommand ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ securityModeCommand-r8 SecurityModeCommand-r8-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } SecurityModeCommand-r8-IEs ::= SEQUENCE { securityConfigSMC SecurityConfigSMC, nonCriticalExtension SecurityModeCommand-v8a0-IEs OPTIONAL } SecurityModeCommand-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL } SecurityConfigSMC ::= SEQUENCE { securityAlgorithmConfig SecurityAlgorithmConfig, ... }

AS Security Mode Complete

UE ➔ MN-eNB

TS 36.331

SecurityModeComplete ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { securityModeComplete-r8 SecurityModeComplete-r8-IEs, criticalExtensionsFuture SEQUENCE {} } } SecurityModeComplete-r8-IEs ::= SEQUENCE { nonCriticalExtension SecurityModeComplete-v8a0-IEs OPTIONAL } SecurityModeComplete-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL }

RRC Connection Reconfiguration

MN-eNB ➔ UE

TS 36.331

When configuring the default bearer:

RRCConnectionReconfiguration ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ rrcConnectionReconfiguration-r8 RRCConnectionReconfiguration-r8-IEs, spare7 NULL, spare6 NULL, spare5 NULL, spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionReconfiguration-r8-IEs ::= SEQUENCE { measConfig MeasConfig OPTIONAL, -- Need ON mobilityControlInfo MobilityControlInfo OPTIONAL, -- Cond HO dedicatedInfoNASList SEQUENCE (SIZE(1..maxDRB)) OF DedicatedInfoNAS OPTIONAL, -- Cond nonHO radioResourceConfigDedicated RadioResourceConfigDedicated OPTIONAL, -- Cond HO-toEUTRA securityConfigHO SecurityConfigHO OPTIONAL, -- Cond HO-toEPC nonCriticalExtension RRCConnectionReconfiguration-v890-IEs OPTIONAL } /*---clipped----*/

MeasConfig

MeasConfig ::= SEQUENCE { -- Measurement objects measObjectToRemoveList MeasObjectToRemoveList OPTIONAL, -- Need ON measObjectToAddModList MeasObjectToAddModList OPTIONAL, -- Need ON -- Reporting configurations reportConfigToRemoveList ReportConfigToRemoveList OPTIONAL, -- Need ON reportConfigToAddModList ReportConfigToAddModList OPTIONAL, -- Need ON -- Measurement identities measIdToRemoveList MeasIdToRemoveList OPTIONAL, -- Need ON measIdToAddModList MeasIdToAddModList OPTIONAL, -- Need ON -- Other parameters quantityConfig QuantityConfig OPTIONAL, -- Need ON measGapConfig MeasGapConfig OPTIONAL, -- Need ON s-Measure RSRP-Range OPTIONAL, -- Need ON preRegistrationInfoHRPD PreRegistrationInfoHRPD OPTIONAL, -- Need OP speedStatePars CHOICE { release NULL, setup SEQUENCE { mobilityStateParameters MobilityStateParameters, timeToTrigger-SF SpeedStateScaleFactors } } /* ---- clipped ---- */ }

MeasObjectToAddModList

MeasObjectToAddModList ::= SEQUENCE (SIZE (1..maxObjectId)) OF MeasObjectToAddMod MeasObjectToAddMod ::= SEQUENCE { measObjectId MeasObjectId, measObject CHOICE { measObjectEUTRA MeasObjectEUTRA, measObjectUTRA MeasObjectUTRA, measObjectGERAN MeasObjectGERAN, measObjectCDMA2000 MeasObjectCDMA2000, ..., measObjectWLAN-r13 MeasObjectWLAN-r13, measObjectNR-r15 MeasObjectNR-r15 } }

MeasObjectNR-r15

The IE MeasObjectNR specifies information applicable for inter-RAT NR neighboring cells.

MeasObjectNR-r15 ::= SEQUENCE { carrierFreq-r15 ARFCN-ValueNR-r15, rs-ConfigSSB-r15 RS-ConfigSSB-NR-r15, threshRS-Index-r15 ThresholdListNR-r15 OPTIONAL, -- Need OR maxRS-IndexCellQual-r15 MaxRS-IndexCellQualNR-r15 OPTIONAL, -- Need OR offsetFreq-r15 Q-OffsetRangeInterRAT DEFAULT 0, blackCellsToRemoveList-r15 CellIndexList OPTIONAL, -- Need ON blackCellsToAddModList-r15 CellsToAddModListNR-r15 OPTIONAL, -- Need ON quantityConfigSet-r15 INTEGER (1.. maxQuantSetsNR-r15), cellsForWhichToReportSFTD-r15 SEQUENCE (SIZE (1..maxCellSFTD)) OF PhysCellIdNR-r15 OPTIONAL, -- Need OR ..., [[ cellForWhichToReportCGI-r15 PhysCellIdNR-r15 OPTIONAL, -- Need ON deriveSSB-IndexFromCell-r15 BOOLEAN OPTIONAL, -- Need ON ss-RSSI-Measurement-r15 SS-RSSI-Measurement-r15 OPTIONAL, -- Need ON bandNR-r15 CHOICE { release NULL, setup FreqBandIndicatorNR-r15 } OPTIONAL -- Need ON ]] } RS-ConfigSSB-NR-r15 ::= SEQUENCE { measTimingConfig-r15 MTC-SSB-NR-r15, subcarrierSpacingSSB-r15 ENUMERATED {kHz15, kHz30, kHz120, kHz240}, ... } CellsToAddModListNR-r15 ::= SEQUENCE (SIZE (1..maxCellMeas)) OF CellsToAddModNR-r15 CellsToAddModNR-r15 ::= SEQUENCE { cellIndex-r15 INTEGER (1..maxCellMeas), physCellId-r15 PhysCellIdNR-r15 }

RRC Connection Reconfiguration Complete

UE ➔ MN-eNB

TS 36.331

RRCConnectionSetupComplete ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ rrcConnectionSetupComplete-r8 RRCConnectionSetupComplete-r8-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionSetupComplete-r8-IEs ::= SEQUENCE { selectedPLMN-Identity INTEGER (1..maxPLMN-r11), registeredMME RegisteredMME OPTIONAL, dedicatedInfoNAS DedicatedInfoNAS, nonCriticalExtension RRCConnectionSetupComplete-v8a0-IEs OPTIONAL } RRCConnectionSetupComplete-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1020-IEs OPTIONAL } RRCConnectionSetupComplete-v1020-IEs ::= SEQUENCE { gummei-Type-r10 ENUMERATED {native, mapped} OPTIONAL, rlf-InfoAvailable-r10 ENUMERATED {true} OPTIONAL, logMeasAvailable-r10 ENUMERATED {true} OPTIONAL, rn-SubframeConfigReq-r10 ENUMERATED {required, notRequired} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1130-IEs OPTIONAL } /*----clipped----*/

Initial Context Setup Response

MN-eNB ➔ MME

TS 36.413

IE/Group Name Presence
Message Type M
MME UE S1AP ID M
eNB UE S1AP ID M
E-RAB Setup List

E-RAB Setup Item IEs [E-RAB ID]

IE/Group Name Presence
E-RAB ID M
Transport Layer Address M
GTP-TEID M
E-RAB Failed to Setup List O
Criticality Diagnostics O

Attach Complete

UE ➔ MME

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
Security header type Security header type M
Attach complete message identity Message type M
ESM message container - Activate Default EPS Bearer Accept ESM message container M

Activate Default EPS Bearer Accept

UE ➔ MME

TS 24.301

Information Element Type Presence
Protocol discriminator Protocol discriminator M
EPS bearer identity EPS bearer identity M
Procedure transaction identity Procedure transaction identity M
Activate default EPS bearer context accept message identity Message type M
Protocol configuration options Protocol configuration options O
Extended protocol configuration options Extended protocol configuration options O

Measurement Report

UE ➔ MN-eNB

TS 36.331

MeasurementReport ::= SEQUENCE { criticalExtensions CHOICE { c1 CHOICE{ measurementReport-r8 MeasurementReport-r8-IEs, spare7 NULL, spare6 NULL, spare5 NULL, spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } MeasurementReport-r8-IEs ::= SEQUENCE { measResults MeasResults, nonCriticalExtension MeasurementReport-v8a0-IEs OPTIONAL } MeasurementReport-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL }

MeasResults

MeasResults ::= SEQUENCE { measId MeasId, measResultPCell SEQUENCE { rsrpResult RSRP-Range, rsrqResult RSRQ-Range }, measResultNeighCells CHOICE { ..., measResultNeighCellListNR-r15 MeasResultCellListNR-r15 } MeasResultCellListNR-r15::= SEQUENCE (SIZE (1..maxCellReport)) OF MeasResultCellNR-r15 MeasResultCellNR-r15 ::= SEQUENCE { pci-r15 PhysCellIdNR-r15, measResultCell-r15 MeasResultNR-r15, measResultRS-IndexList-r15 MeasResultSSB-IndexList-r15 OPTIONAL, ..., [[ cgi-Info-r15 CGI-InfoNR-r15 OPTIONAL ]] } MeasResultNR-r15 ::= SEQUENCE { rsrpResult-r15 RSRP-RangeNR-r15 OPTIONAL, rsrqResult-r15 RSRQ-RangeNR-r15 OPTIONAL, rs-sinr-Result-r15 RS-SINR-RangeNR-r15 OPTIONAL, ... }

SgNB Addition Request

MN-eNB ➔ SN-gNB

TS 36.423

IE/Group Name Presence
Message Type M
MeNB UE X2AP ID M
NR UE Security Capabilities M
SgNB Security Key M
SgNB UE Aggregate Maximum Bit Rate M
Selected PLMN O
Handover Restriction List O
E-RABs To Be Added List

E-RABs To Be Added Item [E-RAB ID]

IE/Group Name Presence
E-RAB ID M
DRB ID M
EN-DC Resource Configuration M
CHOICE Resource Configuration M

PDCP present in SN

IE/Group Name Presence
Full E-RAB Level QoS Parameters M
Maximum MCG admittable E-RAB Level QoS Parameters C-ifCGandSCGpresent_GBR
DL Forwarding O
MeNB DL GTP TEID at MCG C-ifMCGpresent
S1 UL GTP Tunnel Endpoint M
RLC Mode O

PDCP not present in SN

IE/Group Name Presence
Requested SCG E-RAB Level QoS Parameters M
MeNB UL GTP TEID at PDCP M
Secondary MeNB UL GTP TEID at PDCP O
RLC Mode M
UL configuration C-ifMCGandSCGpresent
UL PDCP SN Length O
DL PDCP SN Length O
Duplication activation O
IE/Group Name Presence
MeNB to SgNB Container M
SgNB UE X2AP ID O
Expected UE Behaviour O
MeNB UE X2AP ID Extension O
Requested split SRBs O
MeNB Resource Coordination Information O
SGNB Addition Trigger Indication O
Subscriber Profile ID for RAT/Frequency priority O
MeNB Cell ID M

SgNB Addition Request Acknowledge

SN-gNB ➔ MN-eNB

TS 36.423

Nested payload::

Container Payload
SgNB to MeNB Container CG-Config
IE/Group Name Presence
Message Type M
MeNB UE X2AP ID M
SgNB UE X2AP ID M
E-RABs Admitted To Be Added List

E-RABs Admitted To Be Added Item [E-RAB ID]

IE/Group Name Presence
E-RAB ID M
EN-DC Resource Configuration M
CHOICE Resource Configuration M

PDCP present in SN

IE/Group Name Presence
S1 DL GTP TEID at the SgNB M
SgNB UL GTP TEID at PDCP C-ifMCGpresent
RLC Mode C-ifMCGpresent
DL Forwarding GTP Tunnel Endpoint O
UL Forwarding GTP Tunnel Endpoint O
Requested MCG E-RAB Level QoS Parameters C-ifMCGandSCGpresent_GBRpresent
UL configuration C-ifMCGandSCGpresent
UL PDCP SN Length O
DL PDCP SN Length O

PDCP not present in SN

IE/Group Name Presence
SgNB DL GTP TEID at SCG M
Secondary SgNB DL GTP TEID at SCG O
LCID O
IE/Group Name Presence
E-RABs Not Admitted List O
SgNB to MeNB Container - CG-Config M
Criticality Diagnostics O
MeNB UE X2AP ID Extension O
Admitted split SRBs O
SgNB Resource Coordination Information O
RRC config indication O

CG-Config

CG-Config ::= SEQUENCE { criticalExtensions CHOICE { c1 CHOICE{ cg-Config CG-Config-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } CG-Config-IEs ::= SEQUENCE { scg-CellGroupConfig OCTET STRING (CONTAINING RRCReconfiguration) OPTIONAL, scg-RB-Config OCTET STRING (CONTAINING RadioBearerConfig) OPTIONAL, configRestrictModReq ConfigRestrictModReqSCG OPTIONAL, drx-InfoSCG DRX-Info OPTIONAL, candidateCellInfoListSN OCTET STRING (CONTAINING MeasResultList2NR) OPTIONAL, measConfigSN MeasConfigSN OPTIONAL, selectedBandCombinationNR BandCombinationInfoSN fr-InfoListSCG FR-InfoList OPTIONAL, candidateServingFreqListNR CandidateServingFreqListNR OPTIONAL, nonCriticalExtension CG-Config-v1540-IEs OPTIONAL } CG-Config-v1540-IEs ::= SEQUENCE { pSCellFrequency ARFCN-ValueNR OPTIONAL, reportCGI-Request SEQUENCE { requestedCellInfo SEQUENCE { ssbFrequency ARFCN-ValueNR, cellForWhichToReportCGI PhysCellId } OPTIONAL } OPTIONAL, ph-InfoSCG PH-TypeListSCG OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL } PH-TypeListSCG ::= SEQUENCE (SIZE (1..maxNrofServingCells)) OF PH-InfoSCG PH-InfoSCG ::= SEQUENCE { servCellIndex ServCellIndex, ph-Uplink PH-UplinkCarrierSCG, ph-SupplementaryUplink PH-UplinkCarrierSCG OPTIONAL, ... } PH-UplinkCarrierSCG ::= SEQUENCE{ ph-Type1or3 ENUMERATED {type1, type3}, ... } MeasConfigSN ::= SEQUENCE { measuredFrequenciesSN SEQUENCE (SIZE (1..maxMeasFreqsSN)) OF NR-FreqInfo OPTIONAL, ... } NR-FreqInfo ::= SEQUENCE { measuredFrequency ARFCN-ValueNR OPTIONAL, ... } ConfigRestrictModReqSCG ::= SEQUENCE { requestedBC-MRDC BandCombinationInfoSN OPTIONAL, requestedP-MaxFR1 P-Max OPTIONAL, ... } BandCombinationIndex ::= INTEGER (1..maxBandComb) BandCombinationInfoSN ::= SEQUENCE { bandCombinationIndex BandCombinationIndex, requestedFeatureSets FeatureSetEntryIndex } FR-InfoList ::= SEQUENCE (SIZE (1..maxNrofServingCells-1)) OF FR-Info FR-Info ::= SEQUENCE { servCellIndex ServCellIndex, fr-Type ENUMERATED {fr1, fr2} } CandidateServingFreqListNR ::= SEQUENCE (SIZE (1.. maxFreqIDC-MRDC)) OF ARFCN-ValueNR

RRC Connection Reconfiguration for 5G-NR Bearer

MN-eNB ➔ UE

TS 36.331

Nested payload::

Container Payload
nr-SecondaryCellGroupConfig-r15 CG-Config
RRCConnectionReconfiguration ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ rrcConnectionReconfiguration-r8 RRCConnectionReconfiguration-r8-IEs, spare7 NULL, spare6 NULL, spare5 NULL, spare4 NULL, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionReconfiguration-r8-IEs ::= SEQUENCE { measConfig MeasConfig OPTIONAL, -- Need ON mobilityControlInfo MobilityControlInfo OPTIONAL, -- Cond HO dedicatedInfoNASList SEQUENCE (SIZE(1..maxDRB)) OF DedicatedInfoNAS OPTIONAL, -- Cond nonHO radioResourceConfigDedicated RadioResourceConfigDedicated OPTIONAL, -- Cond HO-toEUTRA securityConfigHO SecurityConfigHO OPTIONAL, -- Cond HO-toEPC nonCriticalExtension RRCConnectionReconfiguration-v890-IEs OPTIONAL } /*---clipped----*/

5G NR Information Elements

RRCConnectionReconfiguration-v1510-IEs ::= SEQUENCE { nr-Config-r15 CHOICE { release NULL, setup SEQUENCE { endc-ReleaseAndAdd-r15 BOOLEAN, nr-SecondaryCellGroupConfig-r15 OCTET STRING OPTIONAL, -- Need ON /* Contains cg-Config */ p-MaxEUTRA-r15 P-Max OPTIONAL -- Need ON } } OPTIONAL, -- Need ON sk-Counter-r15 INTEGER (0.. 65535) OPTIONAL, -- Need ON nr-RadioBearerConfig1-r15 OCTET STRING OPTIONAL, -- Need ON nr-RadioBearerConfig2-r15 OCTET STRING OPTIONAL, -- Need ON tdm-PatternConfig-r15 CHOICE { release NULL, setup SEQUENCE { subframeAssignment-r15 SubframeAssignment-r15, harq-Offset-r15 INTEGER (0.. 9) } } OPTIONAL, -- Cond FDD-PCell nonCriticalExtension RRCConnectionReconfiguration-v1530-IEs OPTIONAL } RRCConnectionReconfiguration-v1530-IEs ::= SEQUENCE { securityConfigHO-v1530 SecurityConfigHO-v1530 OPTIONAL, -- Cond HO-5GC sCellGroupToReleaseList-r15 SCellGroupToReleaseList-r15 OPTIONAL, -- Need ON sCellGroupToAddModList-r15 SCellGroupToAddModList-r15 OPTIONAL, -- Need ON dedicatedInfoNASList-r15 SEQUENCE (SIZE(1..maxDRB-r15)) OF DedicatedInfoNAS OPTIONAL, -- Cond nonHO p-MaxUE-FR1-r15 P-Max OPTIONAL, -- Need OR smtc-r15 MTC-SSB-NR-r15 OPTIONAL, -- Need OP nonCriticalExtension SEQUENCE {} OPTIONAL } SCellGroupToAddModList-r15 ::= SEQUENCE (SIZE (1..maxSCellGroups-r15)) OF SCellGroupToAddMod-r15 SCellGroupToAddMod-r15 ::= SEQUENCE { sCellGroupIndex-r15 SCellGroupIndex-r15, sCellConfigCommon-r15 SCellConfigCommon-r15 OPTIONAL, -- Need ON sCellToReleaseList-r15 SCellToReleaseListExt-r13 OPTIONAL, -- Need ON sCellToAddModList-r15 SCellToAddModListExt-r13 OPTIONAL -- Need ON } SCellGroupIndex-r15 ::= INTEGER (1..maxSCellGroups-r15) SCellConfigCommon-r15 ::= SEQUENCE { radioResourceConfigCommonSCell-r15 RadioResourceConfigCommonSCell-r10 OPTIONAL, -- Need ON radioResourceConfigDedicatedSCell-r15 RadioResourceConfigDedicatedSCell-r10 OPTIONAL,-- Need ON antennaInfoDedicatedSCell-r15 AntennaInfoDedicated-v10i0 OPTIONAL -- Need ON } SecurityConfigHO-v1530 ::= SEQUENCE { handoverType-v1530 CHOICE { intra5GC-r15 SEQUENCE { securityAlgorithmConfig-r15 SecurityAlgorithmConfig OPTIONAL, -- Cond fullConfig keyChangeIndicator-r15 BOOLEAN, nextHopChainingCount-r15 NextHopChainingCount, nas-Container-r15 OCTET STRING OPTIONAL -- Need ON }, fivegc-ToEPC-r15 SEQUENCE { securityAlgorithmConfig-r15 SecurityAlgorithmConfig, nextHopChainingCount-r15 NextHopChainingCount }, epc-To5GC-r15 SEQUENCE { securityAlgorithmConfig-r15 SecurityAlgorithmConfig, nas-Container-r15 OCTET STRING } }, ... }

RRC Connection Reconfiguration Complete for 5G-NR Bearer

UE ➔ MN-eNB

Nested payload:

Container Payload
scg-ConfigResponseNR-r15 NR RRCReconfigurationComplete

TS 36.331

RRCConnectionSetupComplete ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { c1 CHOICE{ rrcConnectionSetupComplete-r8 RRCConnectionSetupComplete-r8-IEs, spare3 NULL, spare2 NULL, spare1 NULL }, criticalExtensionsFuture SEQUENCE {} } } RRCConnectionSetupComplete-r8-IEs ::= SEQUENCE { selectedPLMN-Identity INTEGER (1..maxPLMN-r11), registeredMME RegisteredMME OPTIONAL, dedicatedInfoNAS DedicatedInfoNAS, nonCriticalExtension RRCConnectionSetupComplete-v8a0-IEs OPTIONAL } RRCConnectionSetupComplete-v8a0-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1020-IEs OPTIONAL } RRCConnectionSetupComplete-v1020-IEs ::= SEQUENCE { gummei-Type-r10 ENUMERATED {native, mapped} OPTIONAL, rlf-InfoAvailable-r10 ENUMERATED {true} OPTIONAL, logMeasAvailable-r10 ENUMERATED {true} OPTIONAL, rn-SubframeConfigReq-r10 ENUMERATED {required, notRequired} OPTIONAL, nonCriticalExtension RRCConnectionSetupComplete-v1130-IEs OPTIONAL } /*----clipped----*/ RRCConnectionReconfigurationComplete-v1510-IEs ::= SEQUENCE { scg-ConfigResponseNR-r15 OCTET STRING OPTIONAL, /* Contains the NR RRCReconfigurationComplete */ nonCriticalExtension RRCConnectionReconfigurationComplete-v1530-IEs OPTIONAL } RRCConnectionReconfigurationComplete-v1530-IEs ::= SEQUENCE { logMeasAvailableBT-r15 ENUMERATED {true} OPTIONAL, logMeasAvailableWLAN-r15 ENUMERATED {true} OPTIONAL, flightPathInfoAvailable-r15 ENUMERATED {true} OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL }

NR RRCReconfigurationComplete

TS 38.331

RRCReconfigurationComplete ::= SEQUENCE { rrc-TransactionIdentifier RRC-TransactionIdentifier, criticalExtensions CHOICE { rrcReconfigurationComplete RRCReconfigurationComplete-IEs, criticalExtensionsFuture SEQUENCE {} } } RRCReconfigurationComplete-IEs ::= SEQUENCE { lateNonCriticalExtension OCTET STRING OPTIONAL, nonCriticalExtension RRCReconfigurationComplete-v1530-IEs OPTIONAL } RRCReconfigurationComplete-v1530-IEs ::= SEQUENCE { uplinkTxDirectCurrentList UplinkTxDirectCurrentList OPTIONAL, nonCriticalExtension SEQUENCE {} OPTIONAL }

SgNB Reconfiguration Complete

MN-eNB ➔ SN-gNB

TS 36.423

Nested payload::

Container Payload
MeNB to SgNB Container NR RRCReconfigurationComplete
IE/Group Name Presence
Message Type M
MeNB UE X2AP ID M
SgNB UE X2AP ID M
Response Information M

CHOICE Response Type

Configuration successfully applied

IE/Group Name Presence
MeNB to SgNB Container - NR RRCReconfigurationComplete O

Configuration rejected

IE/Group Name Presence
Cause M
IE/Group Name Presence
MeNB UE X2AP ID Extension O

SN Status Transfer

MN-eNB ➔ SN-gNB

TS 36.423

IE/Group Name Presence
Message Type M
Old eNB UE X2AP ID M
New eNB UE X2AP ID M
E-RABs Subject To Status Transfer List

E-RABs Subject To Status Transfer Item [E-RAB ID]

IE/Group Name Presence
E-RAB ID M
Receive Status Of UL PDCP SDUs O
UL COUNT Value M
DL COUNT Value M
Receive Status Of UL PDCP SDUs Extended O
UL COUNT Value Extended O
DL COUNT Value Extended O
Receive Status Of UL PDCP SDUs for PDCP SN Length 18 O
UL COUNT Value for PDCP SN Length 18 O
DL COUNT Value for PDCP SN Length 18 O
IE/Group Name Presence
Old eNB UE X2AP ID Extension O
New eNB UE X2AP ID Extension O
SgNB UE X2AP ID O

SS/PBCH Block

SN-gNB ➔ UE

TS 38.211

NR PSS

SN-gNB ➔ UE

The Primary Synchronization Signal (PSS) is used for radio frame level synchronization. The PSS is a Linear Feedback Shift Register sequence that is designed to provide a long non-repeating sequence.

NR SSS

The Secondary Synchronization Signal (SSS) is used to subframe synchronization.

NR PBCH

MIB ::= SEQUENCE { systemFrameNumber BIT STRING (SIZE (6)), subCarrierSpacingCommon ENUMERATED {scs15or60, scs30or120}, ssb-SubcarrierOffset INTEGER (0..15), dmrs-TypeA-Position ENUMERATED {pos2, pos3}, pdcch-ConfigSIB1 PDCCH-ConfigSIB1, cellBarred ENUMERATED {barred, notBarred}, intraFreqReselection ENUMERATED {allowed, notAllowed}, spare BIT STRING (SIZE (1)) }

Resources for SS/PBCH Block

Signal OFDM symbol number relative to the start of an SS/PBCH block Subcarrier number relative to the start of an SS/PBCH block
PSS 0 56, 57, …, 182
SSS 2 56, 57, …, 182
PBCH 1, 3 0, 1, …, 239
PBCH 2 0, 1, …, 47, 192, 193, …, 239

NR Preamble

UE ➔ gNB

TS 38.213, TS 38.321, TS 38.211

The UE picks a random preamble. The preamble is referenced with the Random Access Preamble Id (RAPID). The preamble transmission is a Zadoff-Chu sequence.

Each preamble transmission is associated with an RA-RNTI.

NR RA-RNTI

The RA-RNTI associated with the PRACH in which the Random Access Preamble is transmitted, is computed as:

RA-RNTI= 1 + s_id + 14 × t_id + 14 × 80 × f_id + 14 × 80 × 8 × ul_carrier_id

Where:

Identifier Description
s_id Index of the first OFDM symbol of the specified PRACH (0 ≤ s_id < 14)
t_id Index of the first slot of the specified PRACH in a system frame (0 ≤ t_id < 80)
f_id Index of the specified PRACH in the frequency domain (0 ≤ f_id < 8)
ul_carrier_id Uplink carrier used for Msg1 transmission (0 for NUL carrier, and 1 for SUL carrier)

PDCCH DCI Format 1_0

gNB ➔ UE

TS 38.212

DCI Format 1_0 is used to assign downlink resources.

Format 1_0 - CRC Scrambled with RA-RNTI

In response to a PRACH transmission, a UE attempts to detect a DCI Format 1_0 with PDCCH CRC scrambled by
the RA-RNTI corresponding to the RACH transmission. The UE looks for message during a configured window of length ra-ResponseWindow.

The RA-RNTI scrambled DCI message signals the frequency and time resources assigned for the transmission of the Transport Block containing the Random Access Response message.

The following information is transmitted by means of the RA-RNTI scrambled DCI Format 1_0:

Field Bits
Frequency domain resource assignment ⌈log2(NRBDL,BWP(NRBDL,BWP + 1)/2)⌉
NRBDL,BWP is the size of CORESET 0
Time domain resource assignment 4
VRB-to-PRB mapping 1
Modulation and coding scheme 5
TB scaling 2
Reserved bits 16

Format 1_0 - CRC Scrambled with C-RNTI

The following information is transmitted by a DCI Format 1_0 with PDCCH CRC scrambled by the assigned C-RNTI:

Field Bits
Identifier of DCI formats 1
Frequency domain resource assignment ⌈log2(NRBDL,BWP(NRBDL,BWP + 1)/2)⌉
NRBDL,BWP is the size of the active DL bandwidth part in case DCI format 1_0
is monitored in the UE specific search space if DCH sizes <= 4 and DCI size with
C-RNTI <= 3. Otherwise NRBDL,BWP is the size of CORESET 0
Time domain resource assignment 4
VRB-to-PRB mapping 1
Modulation and coding scheme 5
New data indicator 1
Redundancy version 2
HARQ process number 4
Downlink assignment index 2
TPC command for scheduled PUCCH 2
PUCCH resource indicator 3
PDSCH-to-HARQ_feedback timing indicator 3

NR Random Access Response

gNB ➔ UE

TS 38.213, TS 38.321

  1. The UE listens on the PDCCH addressed by the RA-RNTI.
  2. Once the PDCCH with the RA-RNTI is decoded, the UE uses the RB resources in the message to receive the downlink transport block.
  3. The downlink transport block contains the MAC PDU.

NR RAR MAC PDU

subPDU 1 bit 1 bit 6-bit MAC subPDU payload
MAC subPDU 1 E T RAPID 1 MAC payload for Random Access Response
MAC subPDU 2 E T RAPID 2 MAC payload for Random Access Response
MAC subPDU 3 E T RAPID 3 MAC payload for Random Access Response
MAC subPDU n
Padding (optional)

NR E/T/RAPID MAC subheader

1 bit 1 bit 6-bit
E T RAPID

NR MAC Payload for Random Access Response

Field Description Bits
R Reserved bit (set to "0") 1
Timing Advance Command The Timing Advance Command field indicates the index value TA used to control the amount of timing adjustment that the MAC entity must apply in TS 38.213. 12
RAR UL Grant The Uplink Grant field indicates the resources to be used on the uplink in TS 38.213 27
Temporary C-RNTI The Temporary C-RNTI field indicates the temporary identity that is used by the MAC entity during Random Access. 16

NR RAR UL Grant

RAR grant field Number of bits
Frequency hopping flag 1
Msg3 PUSCH frequency resource allocation 14
Msg3 PUSCH time resource allocation 4
MCS 4
TPC command for Msg3 PUSCH 3
CSI request 1

NR MAC PDU

SN-gNB ➔ UE

UE ➔ SN-gNB

TS 38.321

subPDU 1 bit 1 bit 6-bit Length MAC subPDU payload
MAC subPDU 1 R F LCID 2 byte Payload
MAC subPDU 2 R F LCID 1 byte Payload
MAC subPDU n
Padding (optional)

PDCCH DCI Format 0_0

gNB ➔ UE

TS 38.212

DCI Format 0_0 is used to assign uplink resources to the UE.

Format 0_0 - CRC Scrambled with C-RNTI

The following information is transmitted by a DCI Format 0_0 with PDCCH CRC scrambled by the assigned C-RNTI:

Field Bits
Identifier of DCI formats 1
Frequency domain resource assignment ⌈log2(NRBUL,BWP(NRBUL,BWP + 1)/2)⌉
NRBUL,BWP is the size of the active UL bandwidth part in case DCI format 0_0 is monitored in the UE specific search space if DCH sizes <= 4 and DCI size with C-RNTI <= 3. Otherwise NRBUL,BWP is the size of the initial UL bandwidth part.
Time domain resource assignment 4
Frequency hopping flag 1
Modulation and coding scheme 5
New data indicator 1
Redundancy version 2
HARQ process number 4
Downlink assignment index 2
TPC command for scheduled PUSCH 2
UL/SUL indicator 1

Dual Connectivity PHR MAC CE

C7 C6 C5 C4 C3 C2 C1 R
C15 C14 C13 C12 C11 C10 C9 C8
C23 C22 C21 C20 C19 C18 C17 C16
C31 C30 C29 C28 C27 C26 C25 C24
P V PH (Type 2, PCell)
R R PCMAX,c 1
P V PH (Type 2, PSCell)
R R PCMAX,c 2
P V PH (Type 1, PCell)
R R PCMAX,c 3
P V PH (Type x, Serving Cell 1)
R R PCMAX,c 4
... ... ...
... ... ...
P V PH (Type x, Serving Cell n)
R R PCMAX,c m

RRC Transfer

IE/Group Name Presence
Message Type M
MeNB UE X2AP ID M
SgNB UE X2AP ID M

split SRB

IE/Group Name Presence
RRC Container O
SRB Type M
Delivery status O

NR UE Report

IE/Group Name Presence
RRC Container M
IE/Group Name Presence
MeNB UE X2AP ID Extension O

Secondary RAT Data Usage Report

SN-gNB ➔ MN-eNB

TS 36.423

IE/Group Name Presence
Message Type M
MeNB UE X2AP ID M
SgNB UE X2AP ID M
Secondary RAT Usage Report list M
MeNB UE X2AP ID Extension O

Secondary RAT Usage Report List

TS 36.423

This IE provides information on the NR resources used with EN-DC.

Secondary RAT Usage Report List

Secondary RAT usage report Item [Bearer Id]

IE/Group Name Presence
E-RAB ID M
Secondary RAT Type M
E-RAB Usage Report List

E-RAB Usage Report Item [Start Time:End Time]

IE/Group Name Presence
Start timestamp M
End timestamp M
Usage count UL M
Usage count DL M

gNB Status Indication

SN-gNB ➔ MN-eNB

TS 36.423

IE/Group Name Presence Value
Message Type M
gNB Overload Information M Enum:
  • overloaded
  • not-overloaded

5G specifications

Specification Version Description
TS 38.211 V15.4.0 (2018-12) NR; Physical channels and modulation
TS 38.212 V15.3.0 (2018-09) NR; Multiplexing and channel coding
TS 38.213 V15.3.0 (2018-09) NR; Physical layer procedures for control
TS 38.321 V15.3.0 (2018-09) NR; Medium Access Control (MAC) protocol specification
TS 38.331 V15.4.0 (2018-12) NR; Radio Resource Control (RRC); Protocol specification

4G specifications

Specification Version Description
TS 24.301 V15.5.0 (2018-12) Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS)
TS 36.211 V15.3.0 (2018-09) E-UTRA; Physical channels and modulation
TS 36.212 V15.3.0 (2018-09) E-UTRA; Multiplexing and channel coding
TS 36.213 V15.3.0 (2018-09) E-UTRA; Physical layer procedures
TS 36.321 V15.4.0 (2018-12) E-UTRA; Medium Access Control (MAC) protocol specification
TS 36.331 V15.4.0 (2018-12) E-UTRA; Radio Resource Control (RRC); Protocol specification
TS 36.413 V15.4.0 (2018-12) E-UTRA; S1 Application Protocol (S1AP); Protocol specification
TS 37.340 V15.4.0 (2018-12) E-UTRA and NR; Multi connectivity; Stage 2