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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
5G;
3GPP Evolved Packet System (EPS);
Evolved General Packet Radio Service (GPRS)
Tunnelling Protocol for Control plane (GTPv2-C);
Stage 3
(3GPP TS 29.274 version 16.6.0 Release 16)
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3GPP TS 29.274 version 16.6.0 Release 16 1 ETSI TS 129 274 V16.6.0 (2021-01)
Reference
RTS/TSGC-0429274vg60
Keywords
5G,LTE,UMTS
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© ETSI 2021.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
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®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
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3GPP TS 29.274 version 16.6.0 Release 16 2 ETSI TS 129 274 V16.6.0 (2021-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found under .
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 29.274 version 16.6.0 Release 16 3 ETSI TS 129 274 V16.6.0 (2021-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 11
1 Scope . 13
2 References . 13
3 Definitions, symbols and abbreviations . 17
3.1 Definitions . 17
3.2 Symbols . 17
3.3 Abbreviations . 17
4 General . 19
4.1 GTP Tunnel . 19
4.2 Protocol stack . 19
4.2.0 General . 19
4.2.1 UDP header and port numbers . 20
4.2.1.0 General . 20
4.2.1.1 Initial Messages . 21
4.2.1.2 Triggered Messages . 21
4.2.1.3 Piggybacked Messages . 21
4.2.2 IP header and IP addresses . 21
4.2.2.1 Initial Messages . 21
4.2.2.2 Triggered Messages . 22
4.2.2.3 Piggybacked Messages . 23
4.2.3 Layer 2 . 23
4.2.4 Layer 1 . 23
4.2.5 Messages with GTPv2 defined replies: Classification of Initial and Triggered Messages . 23
4.3 Transmission Order and Bit Definitions . 24
5 GTP Header for Control Plane . 24
5.1 General format . 24
5.2 Control Plane GTP Extension Header . 24
5.3 GTP-C header for Echo and Version Not Supported Indication messages . 24
5.4 EPC specific GTP-C header . 25
5.5 Usage of the GTPv2-C Header . 25
5.5.1 General . 25
5.5.2 Conditions for sending TEID=0 in GTPv2-C header . 26
5.6 Format of the GTPv2-C Message . 28
6 GTP-C Message Types and Message Formats . 29
6.0 General . 29
6.1 Message Format and Type values . 29
6.1.0 Message Type . 29
6.1.1 Presence requirements of Information Elements . 33
6.1.2 Grouped Information Elements . 34
6.1.3 Information Element instance . 35
6.2 Message Granularity. 35
7 GTP-C messages . 36
7.1 Path Management Messages. 36
7.1.0 General . 36
7.1.1 Echo Request . 36
7.1.2 Echo Response . 37
7.1.3 Version Not Supported Indication . 37
7.2 Tunnel Management Messages . 37
ETSI
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3GPP TS 29.274 version 16.6.0 Release 16 4 ETSI TS 129 274 V16.6.0 (2021-01)
7.2.0 General . 37
7.2.1 Create Session Request . 37
7.2.2 Create Session Response . 59
7.2.3 Create Bearer Request . 72
7.2.4 Create Bearer Response . 76
7.2.5 Bearer Resource Command . 81
7.2.6 Bearer Resource Failure Indication . 84
7.2.7 Modify Bearer Request . 87
7.2.8 Modify Bearer Response . 108
7.2.9 Delete Session Request and Delete Bearer Request . 114
7.2.9.1 Delete Session Request . 114
7.2.9.2 Delete Bearer Request . 121
7.2.10 Delete Session Response and Delete Bearer Response . 127
7.2.10.1 Delete Session Response . 127
7.2.10.2 Delete Bearer Response . 131
7.2.11 Downlink Data Notification messages . 135
7.2.11.1 Downlink Data Notification . 135
7.2.11.2 Downlink Data Notification Acknowledge . 139
7.2.11.3 Downlink Data Notification Failure Indication . 141
7.2.12 Delete Indirect Data Forwarding Tunnel Request . 141
7.2.13 Delete Indirect Data Forwarding Tunnel Response . 142
7.2.14 Modify Bearer Command and Failure Indication . 143
7.2.14.1 Modify Bearer Command . 143
7.2.14.2 Modify Bearer Failure Indication . 145
7.2.15 Update Bearer Request . 147
7.2.16 Update Bearer Response . 152
7.2.17 Delete Bearer Command and Failure Indication . 157
7.2.17.1 Delete Bearer Command . 157
7.2.17.2 Delete Bearer Failure Indication . 159
7.2.18 Create Indirect Data Forwarding Tunnel Request . 162
7.2.19 Create Indirect Data Forwarding Tunnel Response . 165
7.2.20 Void . 167
7.2.21 Release Access Bearers Request . 167
7.2.22 Release Access Bearers Response . 168
7.2.23 Stop Paging Indication . 170
7.2.24 Modify Access Bearers Request . 170
7.2.25 Modify Access Bearers Response . 174
7.2.26 Remote UE Report Notification. 177
7.2.27 Remote UE Report Acknowledge . 178
7.3 Mobility Management Messages . 178
7.3.1 Forward Relocation Request . 178
7.3.2 Forward Relocation Response . 194
7.3.3 Forward Relocation Complete Notification . 197
7.3.4 Forward Relocation Complete Acknowledge . 198
7.3.5 Context Request . 198
7.3.6 Context Response . 202
7.3.7 Context Acknowledge. 214
7.3.8 Identification Request . 217
7.3.9 Identification Response . 218
7.3.10 Forward Access Context Notification . 219
7.3.11 Forward Access Context Acknowledge . 220
7.3.12 Detach Notification . 220
7.3.13 Detach Acknowledge . 221
7.3.14 Change Notification Request . 222
7.3.15 Change Notification Response . 225
7.3.16 Relocation Cancel Request . 226
7.3.17 Relocation Cancel Response . 227
7.3.18 Configuration Transfer Tunnel . 227
7.3.19 RAN Information Relay . 228
7.3.20 ISR Status Indication . 229
7.3.21 UE Registration Query Request . 229
7.3.22 UE Registration Query Response . 230
ETSI
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3GPP TS 29.274 version 16.6.0 Release 16 5 ETSI TS 129 274 V16.6.0 (2021-01)
7.4 CS Fallback and SRVCC related messages . 230
7.4.1 Suspend Notification. 230
7.4.2 Suspend Acknowledge . 232
7.4.3 Resume Notification . 233
7.4.4 Resume Acknowledge . 234
7.4.5 CS Paging Indication . 234
7.4.6 Alert MME Notification . 235
7.4.7 Alert MME Acknowledge . 235
7.4.8 UE Activity Notification . 235
7.4.9 UE Activity Acknowledge . 236
7.5 Non-3GPP access related messages . 236
7.5.1 Create Forwarding Tunnel Request . 236
7.5.2 Create Forwarding Tunnel Response . 236
7.6 Reliable Delivery of Signalling Messages . 237
7.7 Error Handling . 238
7.7.0 Handling Piggybacked Messages . 238
7.7.1 Protocol Errors . 238
7.7.2 Different GTP Versions . 239
7.7.3 GTP Message of Invalid Length . 239
7.7.4 Unknown GTP Message . 239
7.7.5 Unexpected GTP Message . 239
7.7.6 Missing Information Elements . 240
7.7.7 Invalid Length Information Element . 240
7.7.8 Semantically incorrect Information Element . 241
7.7.9 Unknown or unexpected Information Element . 241
7.7.10 Repeated Information Elements . 242
7.7.11 TFT Error Handling . 242
7.8 Path Failure . 242
7.9 Restoration and Recovery . 242
7.9.0 General . 242
7.9.1 Delete PDN Connection Set Request . 242
7.9.2 Delete PDN Connection Set Response . 243
7.9.3 Update PDN Connection Set Request . 243
7.9.4 Update PDN Connection Set Response . 243
7.9.5 PGW Restart Notification . 244
7.9.6 PGW Restart Notification Acknowledge . 244
7.9.7 PGW Downlink Triggering Notification . 245
7.9.8 PGW Downlink Triggering Acknowledge . 245
7.10 Fallback to GTPv1 mechanism . 246
7.11 Fallback to GTPv0. 246
7.12 Trace Management Messages . 247
7.12.1 Trace Session Activation . 247
7.12.2 Trace Session Deactivation . 248
7.13 MBMS Messages . 249
7.13.1 MBMS Session Start Request .
...