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Content for  TS 29.274  Word version:  17.4.0

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1  ScopeWord‑p. 12

The present document specifies the stage 3 of the control plane of the GPRS Tunnelling Protocol, Version 2 (GTPv2-C).
GTPv2-C shall be used over:
  • the S2a, S2b, S3, S4, S5, S8, S10, S11, S16, Sm and Sn signalling interfaces in EPC, specified in TS 23.401 and TS 23.402.
  • the N26 signalling interface between EPC and 5GC, specified in TS 23.501 and TS 23.502.
GTPv2-C based protocols shall also be used over the Sv (see TS 29.280) and S101/S121 (see TS 29.276) interfaces.
In this document, unless otherwise specified, the S2a, S2b, S5 and S8 interfaces refer to the GTP-based S2a, S2b, S5 and S8 interfaces respectively.
The present document specifies functions, procedures and information which apply to GERAN Iu mode. However, functionality related to GERAN Iu mode is neither maintained nor enhanced.

2  ReferencesWord‑p. 12

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 23.003: "Numbering, addressing and identification".
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
TS 29.060: "General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface".
TS 24.008: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
RFC 791  (STD 0005): "Internet Protocol", J. Postel.
RFC 768  (STD 0006): "User Datagram Protocol", J. Postel.
TS 32.251: "Telecommunication Management; Charging Management; Packet Switched (PS) domain charging.
TS 32.298: "Telecommunication Management; Charging Management; Charging Data Record (CDR) parameter classification.
TS 36.413: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)".
TS 33.102: "3G security; Security architecture".
TS 33.401: "3GPP System Architecture Evolution (SAE); Security architecture".
TS 29.281: "General Packet Radio System (GPRS) Tunnelling Protocol User Plane (GTPv1-U)".
TS 29.276: "3GPP Evolved Packet System (EPS); Optimized handover procedures and protocols between E-UTRAN Access and cdma2000 HRPD Access; Stage 3".
TS 29.280: "Evolved Packet System (EPS); 3GPP Sv interface (MME to MSC, and SGSN to MSC) for SRVCC".
RFC 2460:  "Internet Protocol, Version 6 (IPv6) Specification".
TS 23.007: "Restoration procedures".
TS 32.422: "Telecommunication management; Subscriber and equipment trace; Trace control and configuration management ".
TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2".
TS 36.414: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 data transport".
TS 23.272: "Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2".
TS 29.118: "Mobility Management Entity (MME) - Visitor Location Register (VLR) SGs interface specification".
TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".
[24]  void
ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
TS 29.275: "Proxy Mobile IPv6 (PMIPv6) based Mobility and Tunnelling protocols; Stage 3".
TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
TS 48.008: "Mobile Switching Centre - Base Station System (MSC-BSS) interface; Layer 3 specification".
TS 29.212: "Policy and Charging Control (PCC); Reference points".
TS 24.007: "Mobile radio interface signalling layer 3; General Aspects".
RFC 1035:  "Domain Names - Implementation and Specification".
TS 29.303: "Domain Name System Procedures; Stage 3".
TS 25.413: "UTRAN Iu interface Radio Access Network Application Part (RANAP) signalling".
TS 48.018: "General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN); BSS GPRS protocol (BSSGP)".
TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
TS 32.295: "Telecommunication management; Charging management; Charging Data Record (CDR) transfer".
TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description".
TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN) ".
RFC 3588:  "Diameter Base Protocol ".
RFC 4607:  "Source-Specific Multicast for IP".
TS 29.002: "Mobile Application Part (MAP) specification".
TS 29.010: "Information element mapping between Mobile Station - Base Station System (MS - BSS) and Base Station System Mobile-services Switching Centre (BSS - MSC); Signalling procedures and the Mobile Application Part (MAP)".
TS 23.216: "Single Radio Voice Call Continuity (SRVCC); Stage 2".
TS 32.423: "Telecommunication management; Subscriber and equipment trace: Trace data definition and management".
TS 23.402: "Architecture enhancements for non-3GPP accesses.
TR 25.999: "HSPA Evolution (FDD)".
TS 23.292: "IP Multimedia Subsystem (IMS) centralized services".
TS 23.203: "Policy and charging control architecture; Stage 2".
ITU-T Recommendation X.691 (07/2002): "Information technology - ASN.1 encoding rules: Specification of Packed Encoding Rules (PER)".
TS 33.402: "3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses".
TS 23.139: "3GPP system - fixed broadband access network interworking; Stage 2".
IEEE Std 802.11-2012: "IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications".
RFC 5905:  "Network Time Protocol Version 4: Protocol and Algorithms Specification".
TS 32.299: "Telecommunication Management; Charging Management; Diameter charging applications.
TS 23.251: " Network Sharing; Architecture and Functional Description".
TS 23.271: "Location Services".
TS 29.173: "Diameter-based SLh interface for Control Plane LCS".
RFC 5453:  "Reserved IPv6 Interface Identifiers".
RFC 4776:  "Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information".
RFC 3046:  "DHCP Relay Agent Information Option".
TS 23.380: "IMS Restoration Procedures".
TS 22.153: "Multimedia Priority Service".
TS 24.302: "Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks; stage 3".
ITU-T Recommendation E.212: "The international identification plan for mobile terminals and mobile users".
RFC 2474:  "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers".
TS 24.244: "Wireless LAN control plane protocol for trusted WLAN access to EPC".
RFC 7296:  "Internet Key Exchange Protocol Version 2 (IKEv2)".
TS 29.273: "3GPP EPS AAA Interfaces".
TS 29.336: "Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications".
TS 29.272: "Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol".
TS 23.161: "Network-Based IP Flow Mobility (NBIFOM); Stage 2".
TS 23.303: "Proximity-based services (ProSe); Stage 2".
TS 24.161: "Network-Based IP Flow Mobility (NBIFOM); Stage 3".
TS 23.682: "Architecture enhancements to facilitate communications with packet data networks and applications".
TS 23.040: "Technical realization of the Short Message Service (SMS)".
TS 36.323: "Evolved Universal Terrestrial Radio Access (E-UTRA); Packet Data Convergence Protocol (PDCP) specification".
RFC 4995:  "The RObust Header Compression (ROHC) Framework".
TS 43.020: "Security related network functions".
TS 36.444: "EUTRAN M3 Application Protocol (M3AP)".
TS 29.244: "Interface between the Control Plane and the User Plane of EPC Nodes; stage 3".
RFC 2474:  "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers".
TS 23.501: "System Architecture for the 5G System; Stage 2".
TS 23.502: "Procedures for the 5G System; Stage 2".
TS 38.413: "NG-RAN; NG Application Protocol (NGAP)".
TS 33.250: "Security assurance specification for the PGW network product class".
TS 33.501: " Security Architecture and Procedures for 5G System".
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
TS 29.502: "5G System; Session Management Services; Stage 3".
TS 23.287: "Architecture enhancements for 5G System (5GS) to support Vehicle-to-Everything (V2X) services".
TS 23.256: "Support of Uncrewed Aerial Systems (UAS) connectivity, identification and tracking; Stage 2".

3  Definitions, symbols and abbreviationsWord‑p. 16

3.1  DefinitionsWord‑p. 16

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
GTP Protocol Data Unit is either a GTP-C Message or a GTP-U Message. GTP-U Message may be either a signalling message across the user plane tunnel, or a G-PDU (see clause 6).
  • Signalling Message: any GTP-PDU (GTP-C or GTP-U) except the G-PDU.
  • G-PDU: GTP user plane message, which carries the original packet (payload). G-PDU consists of GTP-U header and a T-PDU.
  • T-PDU: original packet, for example an IP datagram, from an UE or a network node in an external packet data network. A T-PDU is the payload that is tunnelled in the GTP-U tunnel.
  • GTP-C Message: GTP control plane message type of a GTP-PDU. GTP-C message consists of GTP-C header, which is followed by zero or more information elements.
  • GTP-U Message: GTP user plane message. The user plane messages are used to carry user data packets, and also signalling messages e.g. for path management and error indication. Therefore, GTP-U message consists of GTP-U header, which is followed by either a T-PDU, or zero or more information elements.
GTP Tunnel:
A GTP tunnel is a communication tunnel between two GTP nodes (see clause 4.1 "GTP Tunnel").
PDN Connection:
"PDN Connection" in this specification only refers to the PDN connection through the SGW and PGW.
RLOS attached UE:
A UE is attached only for accessing Restricted Local Operator Services.
SCEF PDN Connection:
The PDN connection to the SCEF. Unless otherwise indicated in a clause or clause, "PDN Connections" do not refer to any SCEF PDN Connection.
Tunnel Endpoint:
A tunnel endpoint is identified with a TEID, an IP address and a UDP port number (see clause 4.1 "GTP Tunnel").
Tunnel Endpoint Identifier (TEID):
unambiguously identifies a tunnel endpoint in scope of a path (see clause 4.1 "GTP Tunnel").

3.2  SymbolsWord‑p. 16

For the purposes of the present document, the following symbols apply:
Interface between SGW and eNodeB
Interface between eNodeBs

3.3  AbbreviationsWord‑p. 16

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
5G Core Network
Aggregate Maximum Bit Rate
Access Point Name
Access Point Name Network Identifier
Access Point Name Operator Identifier
Correlation MSISDN
EPS Bearer ID
Evolved Node B
Evolved Packet Core
Evolved Packet Data Gateway
Evolved Packet System
Fully Qualified Tunnel Endpoint Identifier
GTP-U non-signalling PDU
General Packet Radio Service
GPRS Tunnelling Protocol
GTP version 2, control plane
GTP version 2, user plane
International Mobile Subscriber Identity
Internet Protocol
Linked EPS Bearer ID
Layer 1
Layer 2
Local Gateway
Local IP Access
Multimedia Broadcast/Multicast Service
Mobile Equipment Identity
Mobile Subscriber ISDN Number
Mobile Terminated Early Data Transmission
Network-based IP Flow Mobility
Network Time Protocol
PDN Address Allocation
Protocol Configuration Options
Protocol Data Unit
Packet Data Network or Public Data Network
PDN Gateway
Procedure Transaction Id
Primary SCG (Secondary Cell Group) Cell
Quality of Service
Radio Access Technology
RAN Information Management
Restricted Local Operator Services
Serving Gateway
Subscriber Profile ID for RAT/Frequency Priority
Session Transfer Number for SRVCC
Tunnel Endpoint Identifier
Tunnel Endpoint Identifier, control plane
Tunnel Endpoint Identifier, user plane
Traffic Flow Template
Type Length Instance Value
Trusted WLAN Access Network
User Datagram Protocol
User Location Information

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