Foreword1 Scope2 References3 Definitions, symbols and abbreviations4 General5 GTP Header for Control Plane6 GTP-C Message Types and Message Formats7 GTP-C messages7.1 Path Management Messages7.2 Tunnel Management Messages7.2.0 General7.2.1 Create Session Request7.2.2 Create Session Response7.2.3 Create Bearer Request7.2.4 Create Bearer Response7.2.5 Bearer Resource Command7.2.6 Bearer Resource Failure Indication7.2.7 Modify Bearer Request7.2.8 Modify Bearer Response7.2.9 Delete Session Request and Delete Bearer Request7.2.10 Delete Session Response and Delete Bearer Response7.2.11 Downlink Data Notification messages7.2.12 Delete Indirect Data Forwarding Tunnel Request7.2.13 Delete Indirect Data Forwarding Tunnel Response7.2.14 Modify Bearer Command and Failure Indication7.2.15 Update Bearer Request7.2.16 Update Bearer Response7.2.17 Delete Bearer Command and Failure Indication7.2.18 Create Indirect Data Forwarding Tunnel Request7.2.19 Create Indirect Data Forwarding Tunnel Response7.2.20 Void7.2.21 Release Access Bearers Request7.2.22 Release Access Bearers Response7.2.23 Stop Paging Indication7.2.24 Modify Access Bearers Request7.2.25 Modify Access Bearers Response7.2.26 Remote UE Report Notification7.2.27 Remote UE Report Acknowledge7.3 Mobility Management Messages7.4 CS Fallback and SRVCC related messages7.5 Non-3GPP access related messages7.6 Reliable Delivery of Signalling Messages7.7 Error Handling7.8 Path Failure7.9 Restoration and Recovery7.10 Fallback to GTPv1 mechanism7.11 Fallback to GTPv07.12 Trace Management Messages7.13 MBMS Messages8 GTP-C Information Elements8.1 Information Element Types8.2 Information Element Format8.3 International Mobile Subscriber Identity (IMSI)8.4 Cause8.5 Recovery (Restart Counter)8.6 Access Point Name (APN)8.7 Aggregate Maximum Bit Rate (AMBR)8.8 EPS Bearer ID (EBI)8.9 IP Address8.10 Mobile Equipment Identity (MEI)8.11 MSISDN8.12 Indication8.13 Protocol Configuration Options (PCO)8.14 PDN Address Allocation (PAA)8.15 Bearer Quality of Service (Bearer QoS)8.16 Flow Quality of Service (Flow QoS)8.17 RAT Type8.18 Serving Network8.19 EPS Bearer Level Traffic Flow Template (Bearer TFT)8.20 Traffic Aggregate Description (TAD)8.21 User Location Information (ULI)8.22 Fully Qualified TEID (F-TEID)8.23 TMSI8.24 Global CN-Id8.25 S103 PDN Data Forwarding Info (S103PDF)8.26 S1-U Data Forwarding (S1UDF)8.27 Delay Value8.28 Bearer Context8.29 Charging ID8.30 Charging Characteristics8.31 Trace Information8.32 Bearer Flags8.33 Void8.34 PDN Type8.35 Procedure Transaction ID (PTI)8.36 Void8.37 Void8.38 MM Context8.39 PDN Connection8.40 PDU Numbers8.41 Packet TMSI (P-TMSI)8.42 P-TMSI Signature8.43 Hop Counter8.44 UE Time Zone8.45 Trace Reference8.46 Complete Request Message8.47 GUTI8.48 Fully Qualified Container (F-Container)8.49 Fully Qualified Cause (F-Cause)8.50 PLMN ID8.51 Target Identification8.52 Void8.53 Packet Flow ID8.54 RAB Context8.55 Source RNC PDCP context info8.56 Port Number8.57 APN Restriction8.58 Selection Mode8.59 Source Identification8.60 Void8.61 Change Reporting Action8.62 Fully qualified PDN Connection Set Identifier (FQ-CSID)8.63 Channel needed8.64 eMLPP Priority8.65 Node Type8.66 Fully Qualified Domain Name (FQDN)8.67 Private Extension8.68 Transaction Identifier (TI)8.69 MBMS Session Duration8.70 MBMS Service Area8.71 MBMS Session Identifier8.72 MBMS Flow Identifier8.73 MBMS IP Multicast Distribution8.74 MBMS Distribution Acknowledge8.75 User CSG Information (UCI)8.76 CSG Information Reporting Action8.77 RFSP Index8.78 CSG ID8.79 CSG Membership Indication (CMI)8.80 Service indicator8.81 Detach Type8.82 Local Distinguished Name (LDN)8.83 Node Features8.84 MBMS Time to Data Transfer8.85 Throttling8.86 Allocation/Retention Priority (ARP)8.87 EPC Timer8.88 Signalling Priority Indication8.89 Temporary Mobile Group Identity (TMGI)8.90 Additional MM context for SRVCC8.91 Additional flags for SRVCC8.92 Void8.93 MDT Configuration8.94 Additional Protocol Configuration Options (APCO)8.95 Absolute Time of MBMS Data Transfer8.96 H(e)NB Information Reporting8.97 IPv4 Configuration Parameters (IP4CP)8.98 Change to Report Flags8.99 Action Indication8.100 TWAN Identifier8.101 ULI Timestamp8.102 MBMS Flags8.103 RAN/NAS Cause8.104 CN Operator Selection Entity8.105 Trusted WLAN Mode Indication8.106 Node Number8.107 Node Identifier8.108 Presence Reporting Area Action8.109 Presence Reporting Area Information8.110 TWAN Identifier Timestamp8.111 Overload Control Information8.112 Load Control Information8.113 Metric8.114 Sequence Number8.115 APN and Relative Capacity8.116 WLAN Offloadability Indication8.117 Paging and Service Information8.118 Integer Number8.119 Millisecond Time Stamp8.120 Monitoring Event Information8.122 Remote UE Context8.123 Remote User ID8.124 Remote UE IP Information8.125 CIoT Optimizations Support Indication8.126 SCEF PDN Connection8.127 Header Compression Configuration8.128 Extended Protocol Configuration Options (ePCO)8.129 Serving PLMN Rate Control8.130 Counter8.131 Mapped UE Usage Type8.132 Secondary RAT Usage Data Report8.133 UP Function Selection Indication Flags8.134 Maximum Packet Loss Rate8.135 APN Rate Control Status8.136 Extended Trace Information8.137 Monitoring Event Extension Information8.138 Additional RRM Policy Index8.139 V2X Context8.140 PC5 QoS Parameters8.141 Services Authorized8.142 Bit Rate8.143 PC5 QoS Flow8.144 SGi PtP Tunnel Address8.145 PGW Change Info8.146 PGW FQDN8.147 Group Id8.148 PSCell ID8.149 UP Security Policy8.150 Alternative IMSI9 Security10 IP - The Networking Technology used by GTP11 Notification of supported features between peer GTP-C entities12 GTP-C load & overload control mechanism13 Detection and handling of late arriving requests14 Handling of Bearer Contexts MismatchB.1 GeneralB.2 Handover/Relocation related generic transparent Containers over RANAP, S1-AP and GTPB.3 Other RANAP and S1-AP and NGAP IEsD.1 GTP-C interfaces not supporting Load ControlD.2 GTP-C interfaces not supporting Overload ControlD.3 "Loss" throttling algorithmD.4 Enforcement of overload control between remote GTP-C entitiesD.4.1 Example of possible implementationD.4.1 Example of possible implementation 7.8 Path Failure 29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM Path failure handling procedures are specified in 3GPP TS 23.007 [17].