Canonical Atlas record

TS 36.423

Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)

Responsible WGR3
StatusUnder change control
Initial releaseRel-8
Selected releaseRel-18
Latest indexed version19.1.0
Series36
TypeTS

Release evolution

Compare evidence between releases

Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.

Release ledger

Version · WI · CR evidence by release

Rel-5no version indexed1 WI0 CRs
Rel-6no version indexed1 WI0 CRs
Rel-88.9.08 WI386 CRs · 29 approved
Rel-99.6.06 WI137 CRs · 28 approved
Rel-1010.7.013 WI135 CRs · 26 approved
Rel-1111.9.017 WI184 CRs · 37 approved
Rel-1212.9.021 WI316 CRs · 32 approved
Rel-1313.8.020 WI322 CRs · 34 approved
Rel-1414.8.09 WI110 CRs · 17 approved
Rel-1515.14.012 WI647 CRs · 148 approved
Rel-1616.13.020 WI472 CRs · 71 approved
Rel-1717.7.08 WI201 CRs · 40 approved
Rel-1818.4.06 WI75 CRs · 14 approved
Rel-1919.1.02 WI16 CRs · 2 approved
R99no version indexed3 WI0 CRs

Rel-18 snapshot

Work affecting this release

75 indexed Change Requests · 6 connected Work Items.

Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →

CR 1807 — Clarification on neighbour information for EN-DC Configuration Update procedure

CR 1805 rev.1 — Correction on neighbour information

CR 1792 rev.3 — Clarification on indication of dormant cell re-activation

CR 1784 rev.1 — Correcting ASN.1 comments for conditional present IE

CR 1787 rev.2 — IAB-node De-registration Handling

CR 1766 rev.3 — Mobility Restrictions with NR NTN - X2AP Impacts

CR 1773 rev.2 — Correction to X2AP Conditional Handover Time Based Information IE

CR 1783 — Clarification on MIMO PRB usage Information reporting over EN-DC X2

CR 1780 rev.1 — Correction on SN RACH report

CR 1776 rev.1 — Rel-18 X2AP rapporteur corrections

CR 1771 — Correction on IAB authorization status transfer for EN-DC

CR 1734 rev.13 — IoT NTN enhancements

Version history

Indexed versions

Showing 60 of 117 indexed versions.

19.1.0Rel-19RAN#1102025-12-25
19.0.0Rel-19RAN#1092025-09-30
18.4.0Rel-18RAN#1072025-03-20
18.3.0Rel-18RAN#1062024-12-18
18.2.0Rel-18RAN#1042024-07-03
18.1.0Rel-18RAN#1032024-03-29
17.7.0Rel-17RAN#1032024-03-29
16.13.0Rel-16RAN#1032024-03-29
18.0.0Rel-18RAN#1022024-01-12
17.6.0Rel-17RAN#1012023-09-22
16.12.0Rel-16RAN#1012023-09-22
15.14.0Rel-15RAN#1012023-09-22
17.5.0Rel-17RAN#1002023-06-29
16.11.0Rel-16RAN#1002023-06-29
17.4.0Rel-17RAN#992023-04-03
17.3.0Rel-17RAN#98-e2023-01-06
17.2.0Rel-17RAN#97-e2022-09-23
17.1.0Rel-17RAN#962022-06-23
16.10.1Rel-16RAN#962022-06-23
16.10.0Rel-16RAN#962022-06-23
17.0.0Rel-17RAN#95-e2022-04-06
16.9.0Rel-16RAN#95-e2022-04-06
15.13.0Rel-15RAN#95-e2022-04-06
16.8.0Rel-16RAN#94-e2021-12-23
15.12.0Rel-15RAN#94-e2021-12-23
16.7.0Rel-16RAN#93-e2021-10-01
16.6.0Rel-16RAN#92-e2021-07-01
16.5.0Rel-16RAN#91-e2021-04-09
16.4.0Rel-16RAN#90-e2021-01-04
16.3.0Rel-16RAN#89-e2020-10-02
15.11.0Rel-15RAN#89-e2020-10-02
16.2.0Rel-16RAN#88-e2020-07-17
15.10.0Rel-15RAN#88-e2020-07-17
16.1.0Rel-16RAN#87-e2020-03-31
15.9.0Rel-15RAN#87-e2020-03-31
16.0.0Rel-16RAN#862020-01-14
15.8.0Rel-15RAN#862020-01-14
15.7.0Rel-15RAN#852019-10-02
14.8.0Rel-14RAN#852019-10-02
13.8.0Rel-13RAN#852019-10-02
15.6.0Rel-15RAN#842019-07-16
15.5.0Rel-15RAN#832019-04-09
15.4.0Rel-15RAN#822019-01-14
14.7.0Rel-14RAN#822019-01-14
15.3.0Rel-15RAN#812018-09-25
15.2.0Rel-15RAN#802018-06-25
15.1.0Rel-15RAN#792018-04-06
14.6.0Rel-14RAN#792018-04-06
15.0.0Rel-15RAN#782018-01-12
14.5.0Rel-14RAN#782018-01-12
14.4.0Rel-14RAN#772017-09-29
14.3.0Rel-14RAN#762017-06-25
13.7.0Rel-13RAN#762017-06-25
14.2.0Rel-14RAN#752017-03-27
14.1.0Rel-14RAN#742017-01-11
13.6.0Rel-13RAN#742017-01-11
14.0.0Rel-14RAN#732016-09-30
13.5.0Rel-13RAN#732016-09-28
13.4.0Rel-13RAN#722016-07-01
12.9.0Rel-12RAN#702016-07-01

Atlas classifications

Meaning and provenance

No Atlas classifications have been attached yet.

Work Items

Standards work connected to TS 36.423

IMS

Provisioning of IP-based multimedia services

Rel-5official
MBMS

Multimedia Broadcast and Multicast Service

Rel-6official
FA

Flexible Alerting

Rel-8official
FA

Stage 3 FA

Rel-8official
FA

Stage 1 FA

Rel-8official
HNB

UTRA HNB

Rel-8official
LTE

Rel-8 LTE 3G Long Term Evolution - Evolved Packet System RAN part

Rel-8official
LTE-RF

LTE Evolved UTRA and UTRAN RF Radio Transmission/Reception, System Performance Requirements and Conformance Testing

Rel-8parsed
LTE-interfaces

LTE eUTRAN Interfaces

Rel-8official
TEI8

(Small) Technical Enhancements and Improvements for Rel-8

Rel-8parsed
EHNB-RAN3

Home NB and Home eNB enhancements - RAN3 aspects

Rel-9parsed
IMS_EMER_LTE

Support for IMS Emergency Calls over LTE

Rel-9official
LCS_LTE

Positioning Support for LTE

Rel-9parsed
MBMS_LTE

MBMS support in LTE

Rel-9official
SON

Rel-9 Self-Organizing Networks (SON)

Rel-9official
TEI9

(Small) Technical Enhancements and Improvements for Rel-9

Rel-9parsed
HNB_HENB_mob_enh

HNB and HeNB Mobility Enhancements

Rel-10official
HNB_HENB_mob_enh-Core

Core part: HNB and HeNB Mobility Enhancements

Rel-10official
LTE_CA-Core

Core part: Carrier Aggregation for LTE

Rel-10official
LTE_CA-Perf

Perf. part: Carrier Aggregation for LTE

Rel-10official
LTE_Relay

Relays for LTE

Rel-10official
LTE_Relay-Core

Core part: Relays for LTE

Rel-10official
MDT_UMTSLTE

Minimization of Drive Tests for E-UTRAN and UTRAN

Rel-10official
MDT_UMTSLTE-Core

Core part: Minimization of Drive Tests for E-UTRAN and UTRAN

Rel-10official
SONenh_LTE

LTE Self Optimizing Networks (SON) enhancements

Rel-10official
SONenh_LTE-Core

Core part: LTE Self Optimizing Networks (SON) enhancements

Rel-10official
TEI10

(Small) Technical Enhancements and Improvements for Rel-10

Rel-10parsed
eICIC_LTE

Enhanced Inter-Cell Interference Control (ICIC) for non-Carrier Aggregation (CA) based deployments of heterogeneous networks for LTE

Rel-10official
eICIC_LTE-Core

Core part: Enhanced Inter-Cell Interference Control (ICIC) for non-Carrier Aggregation (CA) based deployments of heterogeneous networks for LTE

Rel-10official
COMP_LTE_DL-Core

Core part: Coordinated Multi-Point Operation for LTE Downlink

Rel-11official
COMP_LTE_UL-Core

Core part: Coordinated Multi-Point Operation for LTE Uplink

Rel-11official
EHNB_enh1-Core

Core part: Further enhancements to H(e)NB mobility - Part 1

Rel-11official
EHNB_enh2-Core

Core part: Further enhancements to H(e)NB mobility - Part 2

Rel-11official
FS_EHNB_enh

Study on further enhancements for HNB and HeNB

Rel-11parsed
LCS_LTE-NBPS-Core

Core part: Network-Based Positioning Support for LTE

Rel-11official
LTE_CA_enh-Core

Core part: LTE Carrier Aggregation Enhancements

Rel-11official
LTE_DL_FDD700-Core

Core part: New Band LTE Downlink FDD 716-728 MHz (Band 29), Carrier Aggregation of Band 2 and Band 29 and of Band 4 and Band 29

Rel-11parsed
LTE_TDD_add_subframe

Additional special subframe configuration for LTE TDD

Rel-11parsed
LTE_TDD_add_subframe-Core

Core part: Additional special subframe configuration for LTE TDD

Rel-11official
MBMS_LTE_SC-Core

Core part: Service continuity improvements for MBMS for LTE

Rel-11parsed
Netw_Energy_LTE-Core

Core part: Network Energy Saving for E-UTRAN

Rel-11official
SONenh2_LTE_UTRA

Further Self Optimizing Networks (SON) enhancements

Rel-11official
SONenh2_LTE_UTRA-Core

Core part: Further Self Optimizing Networks (SON) enhancements

Rel-11official
TEI11

(Small) Technical Enhancements and Improvements for Rel-11

Rel-11parsed
eICIC_enh_LTE-Core

Core part: Further Enhanced Non CA-based ICIC for LTE

Rel-11official
eMDT_UMTSLTE-Core

Core part: Enhancement of Minimization of Drive Tests for E-UTRAN and UTRAN

Rel-11official
COMP_LTE_IeNB-Core

Core part: Inter-eNB Coordinated Multi-Point (CoMP) for LTE

Rel-12official
EHNB_enh2_X2GW-Core

Core part: Further enhancements for HeNB mobility-X2-GW

Rel-12official
EHNB_enh3-Core

Core part: Further enhancements to H(e)NB mobility - Part 3

Rel-12official
FS_LTE_HRPD_SON

Study on LTE-HRPD (High Rate Packet Data in 3GPP2) inter-RAT SON

Rel-12parsed
FS_RSE-RAN_LTE

Study on RAN aspects of RAN Sharing Enhancements for LTE

Rel-12parsed
HetNet_eMOB_LTE-Core

Core part: HetNet Mobility enhancements for LTE

Rel-12parsed
LC_MTC_LTE-Core

Core part: Low cost & enhanced coverage MTC UE for LTE

Rel-12parsed
LIMONET

LIPA Mobility and SIPTO at the Local Network

Rel-12official
LIMONET-RAN

RAN aspects for SIPTO at the Local Network

Rel-12official
LIMONET-RAN-Core

Core part: RAN aspects for SIPTO at the Local Network

Rel-12official
LTE_CA_HetNet_ICIC-Core

Deleted - Core part: Carrier based HetNet ICIC for LTE

Rel-12official
LTE_D2D_Prox-Core

Core part: LTE Device to Device Proximity Services

Rel-12official
LTE_NAICS-Core

Core part: Network-Assisted Interference Cancellation and Suppression for LTE

Rel-12official
LTE_SC_enh_L1-Core

Core part: E-UTRA Small cell enhancements - Physical layer aspects

Rel-12official
LTE_SC_enh_dualC

Dual connectivity for LTE

Rel-12parsed
LTE_SC_enh_dualC-Core

Core part: Dual connectivity for LTE

Rel-12official
LTE_TDD_eIMTA

Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation

Rel-12parsed
LTE_TDD_eIMTA-Core

Core part: Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation

Rel-12official
MBMS_LTE_OS-Core

Core part: Further MBMS operations support for E-UTRAN

Rel-12official
MTCe-RAN-Core

Core part: RAN enhancements for Machine-Type and other mobile data applications Communications

Rel-12official
TEI12

(Small) Technical Enhancements and Improvements for Rel-12

Rel-12parsed
COMP_LTE_IeNB_sig

Enhanced Signalling for Inter-eNB Coordinated Multi-Point (CoMP) for LTE

Rel-13parsed
COMP_LTE_IeNB_sig-Core

Core part: Enhanced Signalling for Inter-eNB Coordinated Multi-Point (CoMP) for LTE

Rel-13official
FS_LTE_eMDT2

Study on further Enhancements of Minimization of Drive Tests for E-UTRAN

Rel-13parsed
LTE_CA_enh_b5C-Core

Core part: LTE Carrier Aggregation Enhancement Beyond 5 Carriers

Rel-13parsed
LTE_MTCe2_L1

Further LTE Physical Layer Enhancements for MTC

Rel-13parsed
LTE_MTCe2_L1-Core

Core part: Further LTE Physical Layer Enhancements for MTC

Rel-13parsed
LTE_SC_PTM-Core

Core part: Support of single-cell point-to-multipoint transmission in LTE

Rel-13parsed
LTE_WLAN_radio-Core

Core part: LTE-WLAN Radio Level Integration and Interworking Enhancement

Rel-13parsed
LTE_dualC_enh

Dual Connectivity enhancements for LTE

Rel-13parsed
LTE_dualC_ext-Core

Core part: Extension of Dual Connectivity in E-UTRAN

Rel-13parsed
LTE_eD2D_Prox

Enhanced LTE Device to Device Proximity Services

Rel-13parsed
LTE_eD2D_Prox-Core

Core part: Enhanced LTE Device to Device Proximity Services

Rel-13parsed
LTE_eMDT2-Core

Core part: Further Enhancements of Minimization of Drive Tests for E-UTRAN

Rel-13parsed
LTE_extDRX-Core

Core part: RAN enhancements for extended DRX in LTE

Rel-13parsed
NB_IOT-Core

Core part: Narrowband Internet of Things (IOT)

Rel-13parsed
RSE-RAN_LTE

RAN aspects of RAN Sharing Enhancements for LTE

Rel-13parsed
RSE-RAN_LTE-Core

Core part: RAN aspects of RAN Sharing Enhancements for LTE

Rel-13official
TEI13

(Small) Technical Enhancements and Improvements for Rel-13

Rel-13parsed
UTRA_LTE_SON_AAS

Self Organizing Networks (SON) for Active Antenna System (AAS) based deployments

Rel-13parsed
UTRA_LTE_SON_AAS-Core

Core part: Self Organizing Networks (SON) for Active Antenna System (AAS) based deployments

Rel-13official
LTE_FNBID-Core

Core part: Flexible eNB-ID and Cell-ID in E-UTRAN

Rel-14parsed
LTE_SL_V2V-Core

Core part: Support for V2V services based on LTE sidelink

Rel-14parsed
LTE_UL_CAP_enh-Core

Core part: Uplink Capacity Enhancements for LTE

Rel-14parsed
LTE_V2X-Core

Core part: LTE-based V2X Services

Rel-14parsed
LTE_WLAN_aggr-Core

Core part: Enhanced LTE-WLAN Aggregation (LWA)

Rel-14parsed
LTE_eMob

Further mobility enhancements in LTE

Rel-14parsed
LTE_eMob-Core

Core part: Further mobility enhancements in LTE

Rel-14parsed
NB_IOTenh-Core

Core part: Enhancements of NB-IoT

Rel-14parsed
TEI14

(Small) Technical Enhancements and Improvements for Rel-14

Rel-14parsed
EQoE_MTSI

Enhanced QoE Reporting for MTSI

Rel-15parsed
LTE_Aerial

Enhanced LTE Support for Aerial Vehicles

Rel-15parsed
LTE_LIGHT_CON-Core

Stopped - Core part: Signalling reduction to enable light connection for LTE

Rel-15parsed
LTE_MDT_BT_WLAN-Core

Core part: Bluetooth/WLAN measurement collection in LTE Minimization of Drive Tests (MDT)

Rel-15parsed
LTE_QMC_Streaming

Quality of Experience (QoE) Measurement Collection for streaming services in E-UTRAN

Rel-15parsed
LTE_QMC_Streaming-Core

Core part:Quality of Experience (QoE) Measurement Collection for streaming services in E-UTRAN

Rel-15parsed
LTE_UDC-Core

Core part: UL data compression in LTE

Rel-15parsed
LTE_eMTC4-Core

Core part: Even further enhanced MTC for LTE

Rel-15parsed
NB_IOTenh2-Core

Core part: Further NB-IoT enhancements

Rel-15parsed
NR_CPUP_Split

Separation of CP and UP for Split Option 2 of NR

Rel-15parsed
NR_newRAT

New Radio Access Technology

Rel-15parsed
NR_newRAT-Core

Core part: New Radio Access Technology

Rel-15parsed
5G_V2X_NRSL

5G V2X with NR sidelink

Rel-16parsed
5G_V2X_NRSL-Core

Core part: 5G V2X with NR sidelink

Rel-16parsed
Direct_data_fw_NR-Core

Core part: Direct data forwarding between NG-RAN and E-UTRAN nodes for inter-system mobility

Rel-16parsed
LTE_NR_DC_CA_enh-Core

Core part: LTE-NR & NR-NR Dual Connectivity and NR CA enhancements

Rel-16parsed
LTE_feMob-Core

Core part: Even further mobility enhancement in E-UTRAN

Rel-16parsed
NB_IOTenh3

Additional enhancements for NB-IoT

Rel-16parsed
NB_IOTenh3-Core

Core part: Additional enhancements for NB-IoT

Rel-16parsed
NR_CLI_RIM

Cross Link Interference (CLI) handling and Remote Interference Management (RIM) for NR

Rel-16parsed
NR_CLI_RIM-Core

Core part: Cross Link Interference (CLI) handling and Remote Interference Management (RIM) for NR

Rel-16parsed
NR_IAB-Core

Core part: NR_IAB

Rel-16parsed
NR_IIOT-Core

Core part: Support of NR Industrial Internet of Things (IoT)

Rel-16parsed
NR_Mob_enh

NR mobility enhancements

Rel-16parsed
NR_Mob_enh-Core

Core part: NR mobility enhancements

Rel-16parsed
NR_SON_MDT

SON (Self-Organising Networks) and MDT (Minimization of Drive Tests) support for NR

Rel-16parsed
NR_SON_MDT-Core

Core part: SON (Self-Organising Networks) and MDT (Minimization of Drive Tests) support for NR

Rel-16parsed
NR_UE_pow_sav-Core

Core part: UE Power Saving in NR

Rel-16parsed
NR_unlic-Core

Core part: NR-based access to unlicensed spectrum

Rel-16parsed
RACS-RAN

Optimisations on UE radio capability signalling NR/E-UTRA Aspects

Rel-16parsed
RACS-RAN-Core

Core part: Optimisations on UE radio capability signalling NR/E-UTRA Aspects

Rel-16parsed
TEI16

(Small) Technical Enhancements and Improvements for Rel-16

Historical association · verification pending
Rel-16historical link
LTE_NBIOT_eMTC_NTN

NB-IoT/eMTC support for Non-Terrestrial Networks

Rel-17parsed
LTE_NBIOT_eMTC_NTN-Core

Core part: NB-IoT/eMTC support for Non-Terrestrial Networks

Rel-17parsed
LTE_NR_DC_enh2-Core

Core part: Further Multi-RAT Dual-Connectivity enhancements

Rel-17parsed
NR_ENDC_SON_MDT_enh

Enhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR and EN-DC

Rel-17parsed
NR_ENDC_SON_MDT_enh-Core

Core part: Enhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR standalone and MR-DC (Multi-Radio Dual Connectivity)

Rel-17parsed
NR_ext_to_71GHz-Core

Core part: Extending current NR operation to 71GHz

Rel-17parsed
TEI17

(Small) Technical Enhancements and Improvements for Rel-17

Rel-17parsed
UPIP_SEC_LTE-RAN-Core

Core part: User Plane Integrity Protection support for EPC connected architectures

Rel-17parsed
IoT_NTN_enh

IoT (Internet of Things) NTN (non-terrestrial network) enhancements

Rel-18parsed
IoT_NTN_enh-Core

Core part: IoT (Internet of Things) NTN (non-terrestrial network) enhancements

Rel-18parsed
NR_ENDC_SON_MDT_enh2-Core

Core part: Further enhancement of data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR and EN-DC

Rel-18parsed
NR_FR1_lessthan_5MHz_BW-Core

Core part: NR support for dedicated spectrum less than 5MHz for FR1

Rel-18parsed
NR_UAV-Core

Core part: NR support for UAV (Uncrewed Aerial Vehicles)

Rel-18parsed
TEI18

(Small) Technical Enhancements and Improvements for Rel-18

Rel-18parsed
NR_ENDC_SON_MDT_Ph4-Core

Core part: Data collection for SON (Self-Organising Networks)/MDT (Minimization of Drive Tests) in NR standalone and MR-DC (Multi-Radio Dual Connectivity) Phase 4

Rel-19parsed
TEI19

(Small) Technical Enhancements and Improvements for Rel-19

Rel-19parsed
LI

Lawful Interception for GSM Features transposed to UMTS

R99official
TEI

(Small) Technical Enhancements and Improvements for R99

R99parsed
UMTS

UMTS

R99official

Knowledge graph

Related standards

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