Description
IP Packet eXchange (IPX) is a comprehensive service interconnection framework, initially defined by the GSM Association (GSMA) and extensively referenced within 3GPP specifications for inter-operator IP-based services. It is not a single protocol but a relationship model, a set of requirements, and a commercial ecosystem designed for the interconnection of IP-based services between different service providers (SPs), such as mobile network operators (MNOs), application service providers, and content providers. The central entity in this model is the IPX Provider (IPXP), a specialized carrier that acts as an intermediary, providing a managed, hub-based interconnection platform.
Architecturally, IPX creates a layered, peer-to-peer model where service providers do not connect directly to each other in a full mesh, but rather connect to one or more IPX Providers. The IPX Provider then manages the connectivity to all other peered service providers within its network. This hub-and-spoke model drastically reduces the complexity of bilateral agreements and technical integrations. The framework mandates stringent requirements across several layers: the Network Layer requires robust, private IP connectivity (often using MPLS) with guaranteed Service Level Agreements (SLAs) for availability, latency, jitter, and packet loss. The Service Layer defines how specific services like Voice over LTE (VoLTE), SMS over IP, and rich communication services (RCS) are transported, including aspects of quality-of-service (QoS) marking, traffic identification, and session border control (SBC) functions.
Key components of the IPX ecosystem include the IPX Provider's network, which features SBCs for security and interoperability, Diameter agents for signaling, and deep packet inspection (DPI) for service-aware routing and policing. The framework also defines commercial principles like bilateral, non-transit agreements and the 'waterfall' model for financial settlement, which simplifies billing. From a 3GPP perspective, IPX is the recommended backbone for inter-operator IMS-based services (like VoLTE roaming), enabling seamless service delivery across operator boundaries. It works by ensuring that service signaling (SIP, Diameter) and media (RTP) flows are securely tunneled across the IPX network with appropriate QoS treatment, maintaining end-to-end service quality and security that is not guaranteed by the public internet. Its role is to provide a trusted, carrier-grade 'plumbing' system for the global telecom industry's transition to all-IP services.
Purpose & Motivation
IPX was created to solve the critical challenges that arose as the telecommunications industry migrated from legacy circuit-switched interconnection (e.g., using SS7 and TDM links) to packet-switched, IP-based services. The public internet, while ubiquitous, lacks the guaranteed quality, security, and commercial frameworks necessary for carrier-grade services like voice and messaging. Direct bilateral IP interconnects between hundreds of operators would be technically and commercially unscalable. IPX addressed these problems by establishing a standardized, multi-service interconnection model.
Historically, GRX (GPRS Roaming Exchange) served a similar purpose for basic GPRS data roaming, but it was limited in scope. The evolution to rich IP services like IMS-based HD voice, video calling, and RCS demanded a more robust framework. IPX was motivated by the need for a single, unified interconnection platform that could support all these services with end-to-end QoS, security (e.g., via private networks and SBCs), and simplified commercial settlements. It solves the limitations of the public internet (best-effort, insecure) and the limitations of a fragmented, service-specific interconnection approach.
Its creation was driven by mobile operators and the GSMA to ensure the successful and profitable deployment of next-generation services. It provides a future-proof foundation, enabling not just person-to-person services but also emerging IoT and M2M services that require reliable, low-latency global connectivity. IPX is the cornerstone that allows operators to offer seamless 'anywhere, anytime' experiences for their subscribers while maintaining control over service quality and revenue streams in an all-IP world.
Classification
Detected Changes Across Releases
from 3GPP Change RequestsSpecific changes extracted from the „Change history“ tables of 3GPP specifications (113 CRs across 5 releases). Complements the general historical overview above with the evidence-based evolution of this function.
In Release 15, the IP Packet eXchange function was enhanced to support a comprehensive suite of supplementary services over the IP Multimedia Core Network subsystem. These newly introduced services include Flexible Alerting, Message Waiting Indication, Communication HOLD, and Advice of Charge, alongside capabilities like Anonymous Communication Rejection and Malicious Communication Identification. The release also introduced specific configurations for SMS over IP and non-3GPP ICSIs under the 3GPP PS Data Off2 feature.
- 5G IP-CAN for media type restriction policy TS 24.167CR0201
- 3GPP PS Data Off2 configuration for SMS over IP and non-3GPP ICSIs TS 24.167CR0203
- Flexible Alerting (FA) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.239CR0008
- Message Waiting Indication (MWI) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.606CR0020
- Terminating Identification Presentation (TIP) and Terminating Identification Restriction (TIR) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.608CR0029
- Communication HOLD (HOLD) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.610CR0043
+ 27 more changes
In Release 16, the IP function was enhanced with new capabilities for UE IP address and prefix allocation directly by the UPF, including the introduction of a UE IP Address Pool Identity for this procedure. The Packet Forwarding Control Protocol (PFCP) was updated to support UE IP address allocation via AAA or DHCP servers and to allow the provisioning of alternative SMF IP addresses. Furthermore, the release introduced packet rate status reporting and control, and extended IP connectivity and NDS/IP security to include additional IP information and application layer cryptographic profiles.
- IPConnectivity extension to include IP Information TS 24.484CR0138
- Update NDS/IP scope with application layer crypto profiles TS 33.210CR0056
- Providing User Location during IP Messaging TS 23.228CR1237
- Error correction for imsSubscriber Data Management Service and acquistion of an 5GS IP address for TS 23.228CR1235
- 24.484 Server URI and IP version additions TS 24.484CR0108
- N5CW device registration and IP assignment TS 24.502CR0140
+ 29 more changes
In Release 17, the IP function was enhanced with new reporting and address management capabilities, including reporting the UE's local IP address to both Diameter and RADIUS DN-AAA servers. It introduced features for Edge Application Server (EAS) relocation using IP address replacement and improved UE IP address handling with per-slice usage reports and allocation in the control plane. The release also added support for User Plane IP in EPC architectures using NR PDCP and introduced uplink packet buffering during EAS relocation procedures.
- Reporting UE local IP to Diameter DN-AAA server TS 29.061CR0539
- Reporting UE local IP to RADIUS DN-AAA server TS 29.061CR0540
- Edge Relocation using EAS IP address Replacement TS 29.244CR0564
- Per Slice UE IP Address Usage Report TS 29.244CR0583
- UE IP allocation in CP function with SSET and MPAS TS 29.244CR0599
- IP Address and Port number Replacement IE in EAS Discovery procedure with Local DNS Server/Resolver TS 29.244CR0610
+ 13 more changes
In Release 18, the IP function introduced several new capabilities focused on enhanced routing and session handling, particularly for High-Reliability Service-Based Operations (HR-SBO). Key additions include a new IP replacement mechanism for EAS discovery with the V-EASDF, support for DNS traffic routing in networks with overlapping IP address ranges, and N6 tunneling between the V-UPF and V-EASDF to manage PDU sessions with overlapping IP addresses. The release also standardized a next generation IP Packet Report format and clarified UE source IP address mapping for HR-SBO sessions.
- Discover proper AEF with IP information TS 23.222CR0103
- Updates on 3GPP-Packet-Filter TS 29.061CR0553
- EAS discovery procedure with V-EASDF using IP replacement mechanism for supporting HR-SBO TS 29.244CR0823
- Support of DNS traffic routing in multiple DNN networks with the same IP address range TS 29.244CR0825
- UE source IP address mapping for HR-SBO sessions with overlapping IP addresses TS 29.244CR0846
- N6 tunneling between V-UPF and V-EASDF for HR-SBO PDU sessions with overlapping IP addresses TS 29.244CR0847
+ 10 more changes
In Release 19, the IP Packet eXchange function introduced support for MPQUIC-IP and MPQUIC-E, including related steering functionalities and the provisioning of link-specific and MPQUIC Proxy IP addresses for IPv4v6 PDU sessions. It also enhanced packet inspection functionalities and added a procedure using RTCP RR packets to support IMS restoration after a PCRF/PCF failure. Furthermore, new capabilities for identifying and marking the Data Burst Size in downlink GTP-U packets were specified.
- UPF Packet Inspection functionalities TS 29.244CR0881
- MPQUIC-IP and MPQUIC-E support TS 29.244CR0889
- Identification and marking of Data Burst Size in DL GTP-U packets TS 29.244CR0892
- Removing Editor's Note for Packet Inspection Functionalities TS 29.244CR0934
- MPQUIC-IP and MPQUIC-E steering functionalities TS 29.244CR0929
- Add RTCP RR packets trigger procedure to support IMS restoration procedures after PCRF/PCF failure TS 29.334CR0419
+ 4 more changes
Explore further
Broader topics and technologies where IP plays a role.
Defining Specifications
3GPP specifications that define or reference IP, with the latest known release. Sourced from the 3GPP document catalog — see methodology.
| Specification | Title | Release |
|---|---|---|
| TS 21.133 v1400 | 3G Security Requirements | Rel-5 |
| TR 21.905 vj00 | 3GPP Technical Terms and Definitions | Rel-19 |
| TS 22.060 vj00 | GPRS Stage 1 Service Description | Rel-19 |
| TS 22.226 vj00 | Global Text Telephony (GTT) Stage 1 | Rel-19 |
| TS 22.228 vj00 | IP Multimedia Service Requirements | Rel-19 |
| TS 22.234 vd10 | 3GPP-WLAN Interworking Index Specification | Rel-13 |
| TS 22.250 vj00 | IMS Group Management Requirements | Rel-19 |
| TS 22.273 v1700 | IMS Multimedia Telephony with PSTN/ISDN Simulation | Rel-7 |
| TS 22.340 vj00 | IMS Messaging Stage 1 Requirements | Rel-19 |
| TS 22.401 v1800 | Videotelephony Service Requirements for NGN | Rel-8 |
| TS 22.495 v1700 | NGN Requirements for IMS Services | Rel-7 |
| TS 22.519 vj00 | NGN Business Communication Requirements | Rel-19 |
| TR 22.893 va00 | IP Service Interconnection Requirements Study | Rel-10 |
| TR 22.940 vj00 | IMS Messaging Requirements Analysis | Rel-19 |
| TR 22.945 v1300 | Fax Services Guidance for GSM/UMTS | Rel-4 |
| TR 22.960 v1301 | UMTS Mobile Multimedia Technical Challenges | Rel-4 |
| TR 22.977 vj00 | Speech Enabled Services and Multimodal Framework | Rel-19 |
| TR 22.980 vj00 | Network Composition Feasibility Study | Rel-19 |
| TS 23.057 vj00 | Mobile Execution Environment (MExE) Specification | Rel-19 |
| TS 23.060 vj00 | GPRS Service Description Stage 2 | Rel-19 |
| TS 23.078 vj00 | CAMEL Phase 4 Stage 2 Specification | Rel-19 |
| TS 23.107 vj00 | UMTS QoS Framework | Rel-19 |
| TS 23.146 vj00 | 3G Facsimile Group 3 Technical Realization | Rel-19 |
| TS 23.171 v1300 | LCS Stage 2 Specification for UMTS | Rel-4 |
| TS 23.205 vj00 | Bearer Independent CS Core Network Stage 2 | Rel-19 |
| TS 23.207 vj00 | End-to-End QoS Framework for GPRS | Rel-19 |
| TS 23.218 vj00 | IMS Call Model Specification | Rel-19 |
| TS 23.221 vj00 | 3GPP System Architectural Requirements | Rel-19 |
| TS 23.222 vj80 | Common API Framework for 3GPP Northbound APIs | Rel-19 |
| TS 23.228 vj50 | IMS Stage-2 Service Description | Rel-19 |
| TS 23.231 vj00 | SIP-I based CS core network stage 2 | Rel-19 |
| TS 23.234 vd10 | 3GPP-WLAN Interworking Index | Rel-13 |
| TS 23.271 vj00 | LCS Stage 2 Specification | Rel-19 |
| TS 23.278 vj00 | CAMEL for IMS Stage 2 Specification | Rel-19 |
| TS 23.333 vj00 | MRFC-MRFP Mp Interface Requirements | Rel-19 |
| TS 23.700 vk00 | XR Services Application Enablement Layer | Rel-20 |
| TS 23.701 vc00 | WebRTC Access to IMS Architecture Study | Rel-12 |
| TS 23.719 ve00 | Study on Service Domain Centralization (SeDoC) | Rel-14 |
| TS 23.722 vf10 | Common API Framework (CAPIF) for 3GPP Northbound APIs | Rel-15 |
| TR 23.758 vh00 | Study on Edge Application Architecture | Rel-17 |
| TS 23.804 v1700 | SMS/MMS over IP Access Support | Rel-7 |
| TS 23.815 v1500 | IMS Charging Implications | Rel-5 |
| TS 23.894 va00 | IMS Local Breakout & Optimal Media Routing Study | Rel-10 |
| TR 23.976 vj00 | Push Service Requirements Analysis | Rel-19 |
| TR 23.979 vj00 | PoC over 3GPP Systems Architectural Requirements | Rel-19 |
| TR 23.981 vj00 | IPv4 IMS Interworking and Migration Study | Rel-19 |
| TS 24.065 v1310 | GPRS Subnetwork Dependent Convergence Protocol | Rel-4 |
| TS 24.141 vj00 | Presence Service Protocol Details | Rel-19 |
| TS 24.147 vj00 | IMS Conferencing Protocol Details | Rel-19 |
| TS 24.166 vj00 | IMS Conferencing Management Object | Rel-19 |
| TS 24.167 vj00 | 3GPP IMS Management Object Specification | Rel-19 |
| TS 24.173 vj00 | Multimedia Telephony Service and Supplementary Services in IMS | Rel-19 |
| TS 24.196 vj00 | Enhanced Calling Name (eCNAM) Stage 3 Protocol | Rel-19 |
| TS 24.206 v1700 | Voice Call Continuity Between CS and IMS | Rel-7 |
| TS 24.216 vj00 | Communication Continuity Management Object | Rel-19 |
| TS 24.228 v1500 | IP Multimedia Call Control Signaling Flows | Rel-5 |
| TS 24.229 vj50 | IMS call control protocol based on SIP and SDP | Rel-19 |
| TS 24.237 vj00 | IMS Service Continuity Protocol Details | Rel-19 |
| TS 24.239 vj00 | Flexible Alerting Protocol for IMS | Rel-19 |
| TS 24.247 vj10 | IMS Messaging Service Protocol Details | Rel-19 |
| TS 24.259 vj00 | Personal Network Management (PNM) Protocol Details | Rel-19 |
| TS 24.286 vj00 | 3GPP TS 24.286: ICS Management Object | Rel-19 |
| TS 24.292 vj00 | IMS Centralized Services (ICS) Protocol | Rel-19 |
| TS 24.315 vj00 | Operator Determined Barring (ODB) for IMS | Rel-19 |
| TS 24.323 vj00 | IMS Service Level Tracing Management Object | Rel-19 |
| TS 24.371 vj00 | WebRTC IMS Client Access Specification | Rel-19 |
| TS 24.380 vj10 | MCPTT Media Plane Control Protocol | Rel-19 |
| TS 24.391 vj00 | USSD over IMS Management Object Specification | Rel-19 |
| TS 24.404 v1700 | Communication Diversion Services (CDIV) | Rel-7 |
| TS 24.405 v1700 | Conference Service Protocol Description | Rel-7 |
| TS 24.406 v810 | Message Waiting Indication (MWI) Protocol | Rel-8 |
| TS 24.407 v830 | OIP and OIR Simulation Services Protocol | Rel-8 |
| TS 24.408 v1700 | TIP/TIR Services Protocol Specification | Rel-7 |
| TS 24.410 v810 | Protocol Description of HOLD Services | Rel-8 |
| TS 24.411 v1830 | ACR and CB Service Protocol Specification | Rel-8 |
| TS 24.416 v1700 | Malicious Call Identification Service | Rel-7 |
| TS 24.424 vj00 | XCAP over Ut for Supplementary Services MO | Rel-19 |
| TS 24.447 v800 | Advice Of Charge (AOC) Service Protocol | Rel-8 |
| TS 24.454 v840 | Closed User Group (CUG) Protocol Specification | Rel-8 |
| TS 24.484 vj30 | MCS Configuration Management | Rel-19 |
| TS 24.502 vj20 | 5G Core Access via Non-3GPP Networks; Stage 3 | Rel-19 |
| TS 24.504 v8m0 | Communication Diversion Services Stage 3 | Rel-8 |
| TS 24.505 v810 | Protocol Description of the Conference Service | Rel-8 |
| TS 24.508 v820 | TIP and TIR Service Protocol Description | Rel-8 |
| TS 24.516 v830 | MCID Protocol Specification for NGN | Rel-8 |
| TS 24.523 vj00 | NGCN-NGN Interconnection Scenarios | Rel-19 |
| TS 24.524 vj00 | Hosted Enterprise Services Architecture | Rel-19 |
| TS 24.525 vj00 | Business Trunking Architecture & Requirements | Rel-19 |
| TS 24.581 vj00 | MCVideo Media Plane Control Protocol Specification | Rel-19 |
| TS 24.604 vj00 | Communications Diversion (CDIV) Protocol Spec | Rel-19 |
| TS 24.605 vj00 | 3GPP CONF Service Protocol Specification | Rel-19 |
| TS 24.606 vj00 | MWI Service Protocol Description | Rel-19 |
| TS 24.607 vj10 | OIP and OIR Supplementary Services Stage 3 | Rel-19 |
| TS 24.608 vj00 | 3GPP TS 24608: TIP/TIR Services Protocol | Rel-19 |
| TS 24.610 vj00 | Communication Hold (HOLD) Service Protocol | Rel-19 |
| TS 24.611 vj00 | Anonymous Communication Rejection & Barring | Rel-19 |
| TS 24.615 vj00 | Communication Waiting (CW) Service Protocol | Rel-19 |
| TS 24.616 vj00 | Malicious Call Identification (MCID) Protocol | Rel-19 |
| TS 24.642 vj00 | CCBS/CCNR/CCNL SIP Protocol Specification | Rel-19 |
| TS 24.647 vj00 | Advice of Charge (AOC) service protocol | Rel-19 |
| TS 24.654 vj00 | Closed User Group (CUG) supplementary service | Rel-19 |
| TS 24.819 v1700 | IMS Services via Fixed Broadband Access | Rel-7 |
| TS 24.841 v1600 | Presence Service IP Multimedia Subsystem | Rel-6 |
| TR 24.930 vj00 | IMS Session Setup Signalling Flows | Rel-19 |
| TS 25.323 vj00 | Packet Data Convergence Protocol (PDCP) Specification | Rel-19 |
| TS 25.331 vj00 | UTRAN RRC Protocol Specification | Rel-19 |
| TS 25.410 vj00 | Iu Interface Introduction for UTRAN | Rel-19 |
| TS 25.411 vj00 | Iu Interface Layer 1 Specification | Rel-19 |
| TS 25.412 vj00 | Iu Interface Signalling Transport Specification | Rel-19 |
| TS 25.414 vj00 | UTRAN Iu Interface User Plane Transport Protocols | Rel-19 |
| TS 25.420 vj00 | Iur Interface Introduction for UTRAN | Rel-19 |
| TS 25.422 vj00 | Signalling Transport for Iur Interface | Rel-19 |
| TS 25.423 vj00 | UTRAN RNSAP Specification | Rel-19 |
| TS 25.424 vj00 | UTRAN Iur Interface Data Transport & Signalling | Rel-19 |
| TS 25.426 vj00 | UTRAN Iur/Iub Transport Bearers | Rel-19 |
| TS 25.430 vj00 | Introduction to Iub Interface Specifications | Rel-19 |
| TS 25.432 vj00 | Iub NBAP Signalling Transport Specification | Rel-19 |
| TS 25.433 vj00 | Node B Application Part (NBAP) Protocol | Rel-19 |
| TS 25.434 vj00 | UTRAN Iub Interface Data Transport and Signalling | Rel-19 |
| TS 25.442 vj00 | Node B Implementation Specific O&M Transport via RNC | Rel-19 |
| TS 25.444 vj00 | HNB User Data Transport Protocols | Rel-19 |
| TS 25.450 vj00 | Iupc Interface Introduction for UTRAN Positioning | Rel-19 |
| TS 25.452 vj00 | Iupc Interface Signalling Transport for PCAP | Rel-19 |
| TS 25.467 vj00 | UTRAN Architecture for 3G Home Node B | Rel-19 |
| TR 25.912 vj00 | Evolved UTRA and UTRAN Technical Report | Rel-19 |
| TR 25.931 vj00 | UTRAN Signalling Procedures Examples | Rel-19 |
| TR 25.993 vj00 | UTRA RAB Examples and Radio Interface Mapping | Rel-19 |
| TS 26.114 vj10 | IMS Multimedia Telephony Media Handling | Rel-19 |
| TS 26.141 vj00 | IMS Messaging & Presence Media Formats | Rel-19 |
| TS 26.150 vj00 | Syndicated Feed Reception (SFR) Specification | Rel-19 |
| TS 26.233 vf00 | 3GPP Packet-Switched Streaming Service (PSS) | Rel-15 |
| TS 26.237 vj00 | IMS for PSS and MBMS Control | Rel-19 |
| TS 26.346 vj20 | MBMS User Services Media Codecs & Protocols | Rel-19 |
| TS 26.441 vj00 | EVS Audio Processing Introduction | Rel-19 |
| TS 26.442 vj00 | EVS Codec Fixed Point ANSI-C Code | Rel-19 |
| TS 26.443 vj00 | EVS Codec Floating-Point C Code | Rel-19 |
| TS 26.444 vj00 | EVS Codec Conformance Test Sequences | Rel-19 |
| TS 26.448 vj00 | EVS Jitter Buffer Management Specification | Rel-19 |
| TS 26.450 vj00 | EVS Codec DTX System Level Aspects | Rel-19 |
| TS 26.451 vj00 | EVS Codec Voice Activity Detector (VAD) Specification | Rel-19 |
| TS 26.452 vj00 | EVS Codec Fixed-Point C Code Implementation | Rel-19 |
| TR 26.862 vh00 | Immersive Teleconferencing & Telepresence for Remote Terminals | Rel-17 |
| TR 26.902 vj00 | Video Codec Performance for 3GPP Packet Services | Rel-19 |
| TR 26.905 vj00 | Study on Mobile 3D Video Services | Rel-19 |
| TR 26.914 vj00 | Multimedia Telephony over IP Optimization | Rel-19 |
| TR 26.935 vj00 | Speech Codec Performance for Packet Switched Multimedia | Rel-19 |
| TR 26.937 vj00 | 3GPP PSS Characterization | Rel-19 |
| TR 26.946 vj00 | MBMS User Services Overview | Rel-19 |
| TR 26.947 vj00 | FEC Evaluation for MBMS Enhancement | Rel-19 |
| TR 26.952 vj00 | EVS Codec Selection, Verification & Characterization | Rel-19 |
| TS 27.060 vj00 | TE-MT Interworking for Packet Domain | Rel-19 |
| TS 28.734 vj00 | STN Interface NRM IRP Requirements | Rel-19 |
| TR 28.840 vi10 | Technical Report | Rel-18 |
| TS 29.060 vj00 | GPRS Tunnelling Protocol (GTP) version 1 | Rel-19 |
| TS 29.061 vj00 | Packet Domain Interworking for PLMN | Rel-19 |
| TS 29.078 vj00 | CAMEL Phase 4 CAP Specification | Rel-19 |
| TS 29.119 vj00 | GTP for GLR in 3GPP Networks | Rel-19 |
| TS 29.161 vc00 | 3GPP-WLAN Interworking Requirements | Rel-12 |
| TS 29.199 v1900 | Multimedia Messaging Web Services | Rel-9 |
| TS 29.202 vj00 | SS7 Signalling Transport Protocol Architectures | Rel-19 |
| TS 29.228 vj20 | Cx and Dx Interface Signaling Flows | Rel-19 |
| TS 29.244 vj40 | PFCP Specification for Control/User Plane Separation | Rel-19 |
| TS 29.274 vj50 | GTPv2-C Control Plane Protocol Specification | Rel-19 |
| TS 29.276 vj00 | EPS S101/S121/S103 Interfaces Stage 3 | Rel-19 |
| TS 29.277 vj00 | S102 Interface Protocol Specification | Rel-19 |
| TS 29.278 vj00 | CAMEL Application Part (CAP) for IMS Phase 4 | Rel-19 |
| TS 29.281 vj20 | GTPv1-U Protocol Specification | Rel-19 |
| TS 29.328 vj20 | Sh and Dh Interfaces: HSS-AS Interactions | Rel-19 |
| TS 29.332 vj00 | MGCF-IM-MGW Interface Protocol (Mn) | Rel-19 |
| TS 29.333 vj00 | MRFC-MRFP Mp Interface Protocol | Rel-19 |
| TS 29.334 vj00 | IMS-ALG to IMS-AGW Interface Protocol | Rel-19 |
| TS 29.380 vj00 | MCPTT-LMR Interworking Media Plane Control | Rel-19 |
| TS 29.412 v1810 | Trunking Gateway Control Procedures | Rel-8 |
| TS 29.414 vj00 | Nb Interface Bearer Transport & Control Protocols | Rel-19 |
| TS 29.421 v810 | IMS Interworking with External IP Networks | Rel-8 |
| TS 29.424 v801 | H.248 Profile for Trunking Media Gateways | Rel-8 |
| TS 29.458 v850 | SIP Transfer of Tariff Info for Charging | Rel-8 |
| TS 29.582 vj00 | MCData Interworking with LMR Systems | Rel-19 |
| TS 29.658 vj00 | SIP Transfer of Tariff Information | Rel-19 |
| TS 31.112 v1800 | USAT Interpreter System Architecture | Rel-8 |
| TS 31.829 vd00 | ISIM Conformance Requirements Technical Report | Rel-13 |
| TS 32.102 vj00 | Telecom Management Physical Architecture Framework | Rel-19 |
| TS 32.240 vj40 | Charging Management Architecture & Principles | Rel-19 |
| TS 32.251 vj00 | PS Domain Charging Management | Rel-19 |
| TS 32.252 vc00 | 3GPP WLAN Interworking Charging | Rel-12 |
| TS 32.270 vj00 | MMS Charging Management Specification | Rel-19 |
| TS 32.271 vj20 | 3GPP LCS Charging Management Spec | Rel-19 |
| TS 32.272 vj00 | Charging for Push-to-Talk over Cellular (PoC) | Rel-19 |
| TS 32.277 vj20 | Charging Management for Proximity Services (ProSe) | Rel-19 |
| TS 32.278 vj00 | Monitoring Events Offline Charging Specification | Rel-19 |
| TS 32.295 vj00 | 3GPP Charging: CDR Transfer via GTP' Protocol | Rel-19 |
| TS 32.296 vj00 | Online Charging System (OCS) Architecture | Rel-19 |
| TS 32.297 vj00 | Charging Data Record File Transfer | Rel-19 |
| TS 32.298 vj30 | Charging Data Record (CDR) Parameter Specification | Rel-19 |
| TS 32.582 vj00 | HNB Management Information Model for Type 1 Interface | Rel-19 |
| TS 32.583 vj00 | HNB OAM&P Procedure Flows for Type 1 Interface | Rel-19 |
| TS 32.584 vj00 | HNB OAM&P XML Definitions for Type 1 Interface | Rel-19 |
| TS 32.592 vj00 | HeNB OAM&P Information Model | Rel-19 |
| TS 32.593 vj00 | HeNB OAM&P Procedure Flows for Type 1 Interface | Rel-19 |
| TS 32.594 vj00 | Data definitions for HeNB to HeMS Type 1 interface | Rel-19 |
| TS 32.741 vb00 | STN Interface NRM IRP Requirements | Rel-11 |
| TS 32.808 v1800 | Common User Profile Storage Framework | Rel-8 |
| TS 32.816 v800 | UMTS Management Reuse for E-UTRAN/EPC | Rel-8 |
| TS 32.821 v1900 | SON OAM Architecture for Home NodeB | Rel-9 |
| TS 32.833 vb00 | Converged OSS End-to-End Management Study | Rel-11 |
| TS 33.106 vj00 | Lawful Interception Requirements (Pre-Rel-15) | Rel-19 |
| TS 33.107 vj00 | Lawful Interception Architecture & Functions | Rel-19 |
| TS 33.108 vj00 | LI Handover Interface Specification | Rel-19 |
| TS 33.127 vj50 | Lawful Interception Architecture and Functions | Rel-19 |
| TS 33.141 vj00 | Security for Presence Service (Ut reference point) | Rel-19 |
| TS 33.204 vj00 | TCAP Security (TCAPsec) Stage 2 Specification | Rel-19 |
| TS 33.210 vj20 | UMTS Security for IP Networks | Rel-19 |
| TR 33.739 vi10 | Study on security enhancement of support for | Rel-18 |
| TS 33.749 vj00 | Study on security aspects of edge computing enhancement | Rel-19 |
| TS 33.812 v920 | M2M Remote Subscription Management Security | Rel-9 |
| TS 33.822 v1800 | Security Architecture for Inter-Access Mobility | Rel-8 |
| TR 33.851 vh10 | Security for Industrial IoT in 5G | Rel-17 |
| TR 33.853 vh00 | Study on User Plane Integrity Protection | Rel-17 |
| TR 33.978 v1800 | Interim Security for Early IMS | Rel-8 |
| TS 34.109 vj00 | UE Conformance Test Functions for UMTS | Rel-19 |
| TS 36.300 vj00 | E-UTRAN Radio Interface Protocol Architecture Overview | Rel-19 |
| TS 36.302 vj00 | E-UTRA Physical Layer Services | Rel-19 |
| TS 36.323 vj00 | PDCP Protocol Specification | Rel-19 |
| TS 36.361 vj00 | LWIP Encapsulation Protocol Specification | Rel-19 |
| TS 36.401 vj00 | E-UTRAN Overall Architecture Description | Rel-19 |
| TS 36.410 vj00 | S1 Interface: General Aspects and Principles | Rel-19 |
| TS 36.412 vj00 | S1 Signalling Transport Specification | Rel-19 |
| TS 36.414 vj00 | S1 Interface User Plane Transport | Rel-19 |
| TS 36.422 vj00 | X2 Signalling Transport Specification | Rel-19 |
| TS 36.424 vj00 | X2 Interface User Plane Transport Protocols | Rel-19 |
| TS 36.442 vj00 | Signalling transport for M2 and M3 interfaces | Rel-19 |
| TS 36.445 vj00 | M1 interface user plane protocol for MBMS | Rel-19 |
| TS 36.456 vj00 | SLm Interface Introduction | Rel-19 |
| TS 36.458 vj00 | SLm Interface Signalling Transport | Rel-19 |
| TS 37.320 vj00 | Minimization of Drive Tests (MDT) Overview | Rel-19 |
| TS 37.460 vj00 | Iuant Interface Introduction | Rel-19 |
| TS 37.470 vj00 | W1 Interface Introduction for ng-eNB | Rel-19 |
| TS 37.472 vj00 | W1 Interface Signalling Transport Specification | Rel-19 |
| TS 37.480 vj00 | E1 Interface General Aspects and Principles | Rel-19 |
| TS 37.482 vj00 | E1 Signalling Transport Specification | Rel-19 |
| TR 37.901 vf10 | UE Application Layer Data Throughput Performance | Rel-15 |
| TS 38.323 vj00 | Packet Data Convergence Protocol (PDCP) | Rel-19 |
| TS 38.401 vj10 | NG-RAN Architecture Specification | Rel-19 |
| TS 38.412 vj00 | NG Signalling Transport | Rel-19 |
| TS 38.414 vj00 | NG Interface User Plane Protocol | Rel-19 |
| TS 38.422 vj00 | Xn Signalling Transport Specification | Rel-19 |
| TS 38.424 vj00 | Xn Interface User Plane Transport Protocol | Rel-19 |
| TS 38.460 vj00 | E1 Interface General Aspects and Principles | Rel-19 |
| TS 38.462 vj00 | E1 Signalling Transport Specification | Rel-19 |
| TS 38.470 vj10 | F1 Interface Introduction | Rel-19 |
| TS 38.472 vj00 | F1 Interface Signalling Transport Specification | Rel-19 |
| TS 38.474 vj00 | F1 Interface User Plane Protocol | Rel-19 |
| TS 43.033 vd00 | Lawful Interception Stage 2 for GSM/GPRS | Rel-13 |
| TS 43.051 vj00 | GERAN Stage 2 Service Description | Rel-19 |
| TS 43.129 vj00 | PS Handover in GERAN A/Gb and GAN Modes | Rel-19 |
| TS 43.318 vj00 | Generic Access Network (GAN) Stage 2 | Rel-19 |
| TS 43.868 vc10 | GERAN Improvements for MTC Feasibility Study | Rel-12 |
| TR 43.901 vj00 | Generic Access to A/Gb Interface Feasibility Study | Rel-19 |
| TR 43.902 vj00 | GAN Enhancements Feasibility Study | Rel-19 |
| TS 44.060 vj00 | GERAN RLC/MAC Protocol Specification | Rel-19 |
| TS 44.065 vj00 | GPRS SNDCP Specification | Rel-19 |
| TS 44.318 vj00 | Generic Access Network (GAN) Interface Procedures | Rel-19 |
| TS 45.820 vd10 | CIoT for Internet of Things | Rel-13 |
| TS 48.016 vj00 | Gb Interface Network Service Specification | Rel-19 |
| TS 48.103 vj00 | A Interface User Plane Transport Protocols | Rel-19 |