3GPP 29-series — Intra-Fixed-Network Signalling Protocols – Stage 3

The technical specifications (TS) are displayed in blue, while the reports (TR) are shown in green. TS that have been discontinued in earlier releases are indicated with a light blue color. TR in the '9' range that have been stopped are highlighted in light green. TS or TR with a yellow background indicate those updated at the latest Q3-2024 Plenary Meetings. The new ones are displayed with a single red dotted overline.

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click here to see the new 29-series documents introduced at each 3GPP quarterly Plenary Meeting

29.0… 29.1… 29.2… 29.3… 29.4… 29.5… 29.6… 29.8… 29.9…

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TS 29.002	REL 3 → 18	MAP – Mobile Application Part
TS 29.007	REL 3 → 18	General Requirements on Interworking between the PLMN and the ISDN or PSTN
TS 29.010	REL 3 → 18	Information Element Mapping between MS-BSS and BSS-MSC
TS 29.011	REL 3 → 18	Signalling Interworking for Supplementary Services
TS 29.013	REL 3 → 18	Signalling Interworking between ISDN Supplementary Services ASE and MAP protocols
TS 29.016	REL 3 → 18	SGSN-VLR Gs Interface – Network Service specification
TS 29.018	REL 3 → 18	SGSN-VLR Gs Interface – Layer 3 specification
TS 29.060	REL 3 → 18	GTP across the Gn and Gp Interface
TS 29.061	REL 3 → 18	Interworking between the PLMN supporting Packet-based Services and PDNs
TS 29.078	REL 3 → 19	CAMEL Phase X – CAP specification
TS 29.079	REL 10 → 18	Optimal Media Routeing within the IMS


TS 29.108	REL 3 → 18	Application of RANAP on the E-interface
TS 29.109	REL 6 → 18	GAA – Zh and Zn interfaces based on Diameter
TS 29.116	REL 14 → 18	Representational State Transfer over xMB reference point between Content Provider and BM-SC
TS 29.118	REL 8 → 18	MME-VLR SGs Interface Specification
TS 29.119	REL 3 → 18	GTP Specification for GLR
TS 29.120	REL 3 → 18	MAP specification for GLR
TS 29.122	REL 15 → 19	T8 Reference Point for Northbound APIs
TS 29.128	REL 13 → 18	MME and SGSN interfaces for Interworking with Packet Data Networks and Applications
TS 29.139	REL 11 → 18	3GPP System / Fixed Broadband Access Network Interworking – H(e)NB-SeGW interface
TS 29.140	REL 6	MMS – MM10 interface based on Diameter protocol
TS 29.153	REL 13 → 18	Service Exposure Functionality between SCEF and RCAF Reference Point
TS 29.154	REL 13 → 18	Service Capability Exposure Functionality over Nt Reference Point
TS 29.155	REL 13 → 18	Traffic Steering Control – Representational State Transfer (REST) over St reference point
TS 29.161	REL 6 → 11	Interworking between PLMN supporting Packet Based Services with WLAN and PDNs
TS 29.162	REL 6 → 18	Interworking between IMS and IP Networks
TS 29.163	REL 6 → 18	Interworking between IMS and CS Networks
TS 29.164	REL 7 → 18	Interworking between 3GPP CS Domain with BICC/ISUP and external SIP-I Networks
TS 29.165	REL 8 → 18	Inter-IMS Network to Network Interface (NNI)
TS 29.168	REL 8 → 18	Cell Broadcast Centre interfaces with the Evolved Packet Core
TS 29.171	REL 9 → 18	LCS-AP between MME and E-SMLC – SLs interface
TS 29.172	REL 9 → 18	EPC LCS Protocol ELP between GMLC and MME – SLg interface
TS 29.173	REL 9 → 18	Diameter-based SLh interface for Control Plane LCS
TS 29.175	REL 18	IMS Application Server (AS) Services
TS 29.176	REL 18	IMS Media Function (MF) Services

Open Service Access (OSA) API
TS 29.198	REL 3	Part 1
TS 29.198-01	REL 4 → 9	Part 1: Overview
TS 29.198-02	REL 4 → 9	Part 2: Common Data Definitions
TS 29.198-03	REL 4 → 9	Part 3: Framework
TS 29.198-04	REL 4	Part 4: Call control SCF
TS 29.198-04-1	REL 5 → 9	Part 4: Call Control – Sub-part 1: Call Control Common Definitions
TS 29.198-04-2	REL 5 → 9	Part 4: Call Control – Sub-part 2: Generic Call Control SCF
TS 29.198-04-3	REL 5 → 9	Part 4: Call Control – Sub-part 3: Multi-Party Call Control SCF
TS 29.198-04-4	REL 5 → 9	Part 4: Call Control – Sub-part 4: Multimedia Call Control SCF
TS 29.198-04-5	REL 7 → 9	Part 4: Call Control – Sub-part 5: Conference Call Control SCF
TS 29.198-05	REL 4 → 9	Part 5: User Interaction SCF
TS 29.198-06	REL 4 → 9	Part 6: Mobility SCF
TS 29.198-07	REL 4 → 9	Part 7: Terminal Capabilities SCF
TS 29.198-08	REL 4 → 9	Part 8: Data Session Control SCF
TS 29.198-10	REL 8 → 9	Part 10: Connectivity Manager SCF
TS 29.198-11	REL 4 → 9	Part 11: Account Management SCF
TS 29.198-12	REL 4 → 9	Part 12: Charging SCF
TS 29.198-13	REL 5 → 9	Part 13: Policy Management SCF
TS 29.198-14	REL 5 → 9	Part 14: Presence and Availability Management (PAM) SCF
TS 29.198-15	REL 6 → 9	Part 15: Multi-media Messaging (MM) SCF
TS 29.198-16	REL 7 → 9	Part 16: Service Broker SCF

Open Service Access (OSA) Parlay X Web Services
TS 29.199-01	REL 6 → 9	Part 1: Common
TS 29.199-02	REL 6 → 9	Part 2: Third Party Call
TS 29.199-03	REL 6 → 9	Part 3: Call Notification
TS 29.199-04	REL 6 → 9	Part 4: Short Messaging
TS 29.199-05	REL 6 → 9	Part 5: Multimedia Messaging
TS 29.199-06	REL 6 → 9	Part 6: Payment
TS 29.199-07	REL 6 → 9	Part 7: Account Management
TS 29.199-08	REL 6 → 9	Part 8: Terminal Status
TS 29.199-09	REL 6 → 9	Part 9: Terminal Location
TS 29.199-10	REL 6 → 9	Part 10: Call Handling
TS 29.199-11	REL 6 → 9	Part 11: Audio Call
TS 29.199-12	REL 6 → 9	Part 12: Multimedia Conference
TS 29.199-13	REL 6 → 9	Part 13: Address List Management
TS 29.199-14	REL 6 → 9	Part 14: Presence
TS 29.199-15	REL 7 → 9	Part 15: Message Broadcast
TS 29.199-16	REL 7 → 9	Part 16: Geocoding
TS 29.199-17	REL 7 → 9	Part 17: Application-driven Quality of Service (QoS)
TS 29.199-18	REL 7 → 9	Part 18: Device Capabilities and Configuration
TS 29.199-19	REL 7 → 9	Part 19: Multimedia Streaming Control
TS 29.199-20	REL 7 → 9	Part 20: Multimedia Multicast Session Management
TS 29.199-21	REL 8 → 9	Part 21: Content Management
TS 29.199-22	REL 8 → 9	Part 22: Policy


TS 29.201	REL 12 → 18	PCC REST-Rx Reference Point
TS 29.202	REL 4 → 18	SS7 Signalling Transport in Core Network
TS 29.204	REL 7 → 18	SS7 Security Gateway – Architecture, Functional Description and Protocol Details
TS 29.205	REL 4 → 18	Application of Q.1900 series to Bearer Independent CS Core Network Architecture
TS 29.207	REL 5 → 6	Policy Control over Go interface (replaced by TS 29.212 from Rel‑7)
TS 29.208	REL 5 → 6	End-to-End QoS signalling flows (replaced by TS 29.213 from Rel‑7)
TS 29.209	REL 6	Policy control over Gq interface (replaced by TS 29.214 from Rel‑7)
TS 29.210	REL 6	Charging Rule Provisioning over Gx interface (replaced by TS 29.212 from Rel‑7)
TS 29.211	REL 6	Rx interface and Rx/Gx Signalling Flows (replaced by TS 29.213 and .214 from Rel‑7)
TS 29.212	REL 7 → 18	PCC Reference Points: Gx, Gxx, Sd
TS 29.213	REL 7 → 18	PCC Signalling Flows and QoS Parameter Mapping
TS 29.214	REL 7 → 18	PCC over Rx Reference Point
TS 29.215	REL 8 → 18	PCC over S9 Reference Point
TS 29.217	REL 13 → 18	PCC: Congestion Reporting over Np Reference Point
TS 29.219	REL 11 → 18	PCC: Spending Limit Reporting over Sy Reference Point
TS 29.222	REL 15 → 19	Common API Framework for 3GPP Northbound APIs
TS 29.228	REL 5 → 18	Cx and Dx interfaces – Signalling Flows and Message Contents
TS 29.229	REL 5 → 18	Cx and Dx interfaces – Diameter Protocol Details
TS 29.230	REL 6 → 18	Diameter Applications – 3GPP Specific Codes and Identifiers
TS 29.231	REL 8 → 18	Application of SIP-I Protocols to CS Core Network Architecture
TS 29.232	REL 4 → 18	MGC-MGW Interface
TS 29.234	REL 6 → 11	I-WLAN – 3GPP System to WLAN Interworking
TS 29.235	REL 8 → 18	Interworking between SIP-I based CS Core Network and other Networks
TS 29.238	REL 9 → 18	IBCF-TrGW Ix Interface
TS 29.240	REL 6 → 18	GUP – Generic User Profile
TS 29.244	REL 14 → 18	Interface between the Control Plane and the User Plane Nodes
TS 29.250	REL 14 → 18	Nu Reference Point between SCEF and PFDF for Sponsored Data Connectivity
TS 29.251	REL 14 → 18	Gw and Gwn Reference Point for Sponsored Data Connectivity
TS 29.255	REL 17 → 18	Uncrewed Aerial System Service Supplier (USS) Services
TS 29.256	REL 17 → 18	Uncrewed Aerial Systems Network Function (UAS-NF) – Aerial Management Services
TS 29.257	REL 17 → 19	Application layer support for Uncrewed Aerial System (UAS) – UAS Application Enabler (UAE) Server Services
TS 29.272	REL 8 → 18	MME and SGSN related interfaces based on Diameter Protocol
TS 29.273	REL 8 → 18	EPS AAA Interfaces
TS 29.274	REL 8 → 19	GTPv2-C – Evolved GPRS Tunnelling Protocol (eGTP) for EPS
TS 29.275	REL 8 → 18	Proxy Mobile IPv6 (PMIPv6) based Mobility and Tunnelling protocols
TS 29.276	REL 8 → 18	Optimized Handover Procedures and Protocols between E-UTRAN and cdma2000 HRPD
TS 29.277	REL 8 → 18	Optimized Handover Procedures and Protocols between E-UTRAN and 1xRTT
TS 29.278	REL 5 → 18	CAMEL Phase 4 – CAMEL Application Part (CAP) specification for IMS
TS 29.279	REL 8 → 18	Mobile IPv4 (MIPv4) based Mobility Protocols
TS 29.280	REL 8 → 18	3GPP EPS Sv Interface (MME to MSC) for SRVCC
TS 29.281	REL 8 → 19	GPRS Tunnelling Protocol for User Plane (GTPv1-U)
TS 29.282	REL 8 → 18	Mobile IPv6 Vendor Specific Option Format and Usage within 3GPP
TS 29.283	REL 13 → 18	MCPTT – Diameter Data Management Applications
TS 29.292	REL 8 → 18	ICS – Interworking between IMS and MSC Server


TS 29.303	REL 8 → 18	DNS Procedures for EPS
TS 29.305	REL 8 → 18	InterWorking Function (IWF) between MAP based and Diameter based Interfaces
TS 29.309	REL 17 → 18	Bootstrapping Server Function (GBA BSF) Services
TS 29.311	REL 8 → 18	Service Level Interworking for Messaging Services
TS 29.328	REL 5 → 18	Sh interface – Signalling Flows and Message Contents
TS 29.329	REL 5 → 18	Sh interface – Diameter Protocol Details
TS 29.330	REL 18	IMS Sc Interface based on the Diameter protocol
TS 29.332	REL 6 → 18	MGCF-(IM)MGW Mn Interface
TS 29.333	REL 7 → 18	MRFC-MRFP Mp Interface
TS 29.334	REL 9 → 18	IMS ALGCF – IMS Access Media Gateway (IMA-MGW) Iq Interface
TS 29.335	REL 9 → 18	User Data Convergence (UDC) – User Data Repository Access Protocol over the Ud Interface
TS 29.336	REL 11 → 18	HSS Diameter Interfaces for Interworking with Packet Data Networks and Applications
TS 29.337	REL 11 → 18	Diameter based T4 Interface for Communications with Packet Data Networks and Applications
TS 29.338	REL 11 → 18	Diameter based Protocols for support of SMS capable MMEs
TS 29.343	REL 12 → 18	Prose Function to ProSe Application Server aspect (PC2)
TS 29.344	REL 12 → 18	ProSe Function to HSS aspects
TS 29.345	REL 12 → 18	Inter-Prose Function Signalling aspects
TS 29.364	REL 8 → 18	IMS Application Server Service Data Descriptions for AS interoperability
TS 29.368	REL 11 → 18	Tsp Interface between the MTC Interworking Function and an MTC Server outside the 3GPP Network
TS 29.379	REL 16 → 18	MCPTT Call Control Interworking with LMR Systems
TS 29.380	REL 16 → 18	MCPTT Media Plane Control Interworking with LMR Systems
TS 29.388	REL 14 → 18	V2X Control Function to HSS aspects (V4)
TS 29.389	REL 14 → 18	Inter-V2X Control Function Signalling aspects (V6)


TS 29.405	REL 13 → 18	Nq and Nq' Application Protocol (Nq-AP)
TS 29.412	REL 7 → 8	TISPAN – Trunking Gateway Control Procedures
TS 29.413	REL 15 → 18	Application of the NG Application Protocol (NGAP) to non-3GPP access
TS 29.414	REL 4 → 18	Core Network Nb Data Transport and Transport Signalling
TS 29.415	REL 4 → 18	Core Network Nb Interface User Plane Protocols
TS 29.421	REL 7 → 8	TISPAN – Endorsement of 3GPP TS 29.162
TS 29.424	REL 7 → 8	TISPAN – H.248 Profile for controlling Trunking Media Gateways
TS 29.427	REL 7	TISPAN – Endorsement of 3GPP TS 29.163
TS 29.433	REL 7 → 8	TISPAN – Endorsement of 3GPP TS 29.228 and 29.229
TS 29.435	REL 18 → 19	SEAL – Network Slice Capability Enablement (NSCE) Server Services
TS 29.458	REL 8	TISPAN – SIP Transfer of IP Multimedia Service Tariff Information
TS 29.468	REL 12 → 18	Group Communication System Enablers for LTE (GCSE_LTE) – MB2 Reference Point
TS 29.486	REL 16 → 19	Vehicle-to-Everything (V2X) Application Enabler (VAE) service


TS 29.500	REL 15 → 19	5GS – Technical Realization of Service Based Architecture
TS 29.501	REL 15 → 19	5GS – Principles and Guidelines for Services Definition
TS 29.502	REL 15 → 19	5GS – Session Management Services
TS 29.503	REL 15 → 19	5GS – Unified Data Management Services
TS 29.504	REL 15 → 19	5GS – Unified Data Repository Services
TS 29.505	REL 15 → 19	5GS – Usage of the UDR services for Subscription Data
TS 29.507	REL 15 → 19	5GS – Access and Mobility Policy Control Services
TS 29.508	REL 15 → 19	5GS – Session Management Event Exposure Service
TS 29.509	REL 15 → 19	5GS – Authentication Server Services
TS 29.510	REL 15 → 19	5GS – NF Repository Services
TS 29.511	REL 15 → 18	5GS – Equipment Identity Register Services
TS 29.512	REL 15 → 19	5GS – Session Management Policy Control Services
TS 29.513	REL 15 → 19	5GS – Policy and Charging Control Signalling Flows and QoS Parameter Mapping
TS 29.514	REL 15 → 19	5GS – Policy Authorization Services
TS 29.515	REL 16 → 19	5GS – Gateway Mobile Location Services
TS 29.517	REL 16 → 19	5GS – Application Function (AF) event exposure service
TS 29.518	REL 15 → 19	5GS – Access and Mobility Management Services
TS 29.519	REL 15 → 19	5GS – Usage of the UDR Service for Policy Control Data and Structured Data
TS 29.520	REL 15 → 19	5GS – Network Data Analytics Services
TS 29.521	REL 15 → 19	5GS – Binding Support Management Service
TS 29.522	REL 15 → 19	5GS – Network Exposure Function Northbound APIs
TS 29.523	REL 15 → 18	5GS – Policy Control Event Exposure Service
TS 29.524	REL 15 → 18	5GS – Cause Code Mapping between 5GC Interfaces
TS 29.525	REL 15 → 19	5GS – UE Policy Control Service
TS 29.526	REL 16 → 18	5GS – Network Slice-Specific Authentication and Authorization (NSSAA) services
TS 29.527	REL 8	TISPAN – Endorsement of 3GPP TS 29.163
TS 29.531	REL 15 → 19	5GS – Network Slice Selection Services
TS 29.532	REL 17 → 18	5GS – 5G Multicast-Broadcast Session Management Services
TS 29.534	REL 17 → 18	5GS – Access and Mobility Policy Authorization Service
TS 29.535	REL 17 → 19	5GS – AKMA Anchor Services
TS 29.536	REL 17 → 18	5GS – Network Slice Admission Control Services
TS 29.537	REL 17 → 18	5GS – Multicast/Broadcast Policy Control services
TS 29.538	REL 17 → 19	Enabling MSGin5G Service; API specification
TS 29.540	REL 15 → 19	5GS – SMS Services
TS 29.541	REL 16 → 19	5GS – Network Exposure (NE) function services for Non-IP Data Delivery (NIDD)
TS 29.542	REL 16 → 19	5GS – Session management services for Non-IP Data Delivery (NIDD)
TS 29.543	REL 18	5GS – Data Transfer Policy Control Services
TS 29.544	REL 16 → 19	5GS – Secured Packet Application Function (SP-AF) services
TS 29.548	REL 18 → 19	SEAL – SEAL Data Delivery (SEALDD) Server Services
TS 29.549	REL 16 → 19	SEAL – Application Programming Interface (API) specification
TS 29.550	REL 16 → 18	5GS – Steering of roaming application function services
TS 29.551	REL 15 → 18	5GS – Packet Flow Description Management Service
TS 29.552	REL 17 → 19	5GS – Network Data Analytics signalling flows
TS 29.553	REL 17 → 18	5GS – 5G ProSe Anchor Services
TS 29.554	REL 15 → 18	5GS – Background Data Transfer Policy Control Service
TS 29.555	REL 17 → 19	5GS – 5G Direct Discovery Name Management Services
TS 29.556	REL 17 → 18	Edge Application Server Discovery Services
TS 29.557	REL 17 → 19	5GS – Application Function ProSe Service
TS 29.558	REL 17 → 19	Enabling Edge Applications – API specification
TS 29.559	REL 17 → 19	5GS – 5G ProSe Key Management Services
TS 29.561	REL 15 → 18	5GS – Interworking between 5G Network and External Data Networks
TS 29.562	REL 16 → 18	5GS – HSS services for interworking with the IMS
TS 29.563	REL 16 → 19	5GS – HSS services for interworking with UDM
TS 29.564	REL 17 → 19	5GS – User Plane Function Services
TS 29.565	REL 17 → 19	5GS – Time Sensitive Communication and Time Synchronization Function Services
TS 29.571	REL 15 → 19	5GS – Common Data Types for Service Based Interfaces
TS 29.572	REL 15 → 19	5GS – Location Management Services
TS 29.573	REL 15 → 19	5GS – PLMN Interconnection
TS 29.574	REL 17 → 19	5GS – Data Collection Coordination Services
TS 29.575	REL 17 → 19	5GS – Analytics Data Repository Services
TS 29.576	REL 17 → 19	5GS – Messaging Framework Adaptor Services
TS 29.577	REL 17 → 19	5GS – IP Short Message Gateway and SMS Router For Short Message Services
TS 29.578	REL 17 → 19	5GS – Mobile Number Portability Services
TS 29.579	REL 17 → 19	5GS – Interworking MSC For Short Message Services
TS 29.580	REL 17 → 19	5GS – Multicast/Broadcast Service Function services
TS 29.581	REL 17 → 18	5GS – Multicast/Broadcast Service Transport Services
TS 29.582	REL 16 → 18	5GS – MCData interworking with Land Mobile Radio (LMR) systems
TS 29.583	REL 18	Application layer support for Personal IoT Network (PINAPP) Personal IoT Network (PIN) server services
TS 29.585	REL 18	5GS – SMF/CUC to AN-TL and CN-TL protocol aspects
TS 29.586	REL 18 → 19	5GS – SideLink Positioning Key Management Services
TS 29.591	REL 16 → 19	5GS – Network Exposure Function Southbound Services
TS 29.594	REL 15 → 19	5GS – Spending Limit Control Service
TS 29.598	REL 16 → 18	5GS – Unstructured data storage services


TS 29.641	REL 17 → 18	3GPP Registry for Service Names and Port Numbers
TS 29.658	REL 8 → 18	SIP Transfer of IP Multimedia Service Tariff Information
TS 29.673	REL 16 → 18	5GS – UE radio capability management services;
TS 29.674	REL 16 → 18	Interface between the UCMF and the MME
TS 29.675	REL 16 → 18	UE radio capability provisioning service


TR 29.800	REL 7	SS7 Security Gateway – Architecture, Functional Description and Protocol Details
TR 29.801	REL 7	Feasibility Study of using M2PA in 3GPP Networks
TR 29.802	REL 7	(G)MSC-S – (G)MSC-S Nc Interface based on the SIP-I protocol
TR 29.804	REL 8	3GPP System Architecture Evolution (SAE) CT WG3 aspects
TR 29.805	REL 8	InterWorking Function (IWF) between MAP based and Diameter based Interfaces
TR 29.806	REL 12	Study on IMS P-CSCF Restoration Procedures
TR 29.807	REL 12	Study on GTP-C Overload Control Mechanisms
TR 29.808	REL 16	Study on the Nudsf Service Based Interface
TR 29.809	REL 12	Study on Diameter Overload Control Mechanisms
TR 29.810	REL 13	Study on Diameter Load Control mechanisms
TR 29.811	REL 13	Study on EPC Signalling Improvements for Race Scenarios
TR 29.812	REL 13	Study on SCC AS Restoration
TR 29.813	REL 13	Study on S6a/S6d Shared Data Update
TR 29.814	REL 7	Bandwidth saving at Nb interface with IP Transport
TR 29.816	REL 10	Study on PCRF Failure and Restoration
TR 29.817	REL 12	Study on XML based Access of the AF to the PCRF
TR 29.819	REL 13	Study on Impacts of the Diameter Base Protocol Specification Update
TR 29.820	REL 17	Study on Best Practice of PFCP
TR 29.821	REL 17	Study on restoration of profiles related to UDR
TR 29.826	REL 13	P-CSCF restoration enhancements for WLAN
TR 29.827	REL 15 → 16	Study on Policy and Charging for Volume Based Charging
TR 29.828	REL 12	Study on extended IMS Media Plane Security Features and TCP-related NAT Traversal Support
TR 29.829	REL 17	Service-based support for SMS in 5GC
TR 29.831	REL 18	Study on NRF API enhancements to avoid signalling and storing of redundant data
TR 29.835	REL 17	Study on Port Allocation Alternatives for New 3GPP Interfaces
TR 29.839	REL 11	3GPP System to Fixed Broadband Access Network Interworking – HeNB-SeGW Interface
TR 29.843	REL 16	Study on Load and Overload Control of 5GC Service Based Interface
TR 29.844	REL 14	Study on Control and User Plane Separation of EPC Nodes
TR 29.846	REL 6	MBMS – CN1 procedure description
TR 29.847	REL 6	Conferencing based on SIP, SDP, and other Protocols
TR 29.854	REL 12	Study on Shared Data Update for Multiple Subscribers
TR 29.863	REL 7 → 8	Feasibility Study for the Multimedia Inter-Working between the IMS and CS Networks
TR 29.864	REL 8	Study on IMS Application Server Service Data Descriptions for AS Interoperability
TR 29.865	REL 8	Inter-IMS Network to Network Interface
TR 29.882	REL 8	Customized Alerting Tone (CAT) in 3G CS Domain
TR 29.890	REL 15 → 16	CT WG3 aspects of 5G System Phase 1
TR 29.891	REL 15 → 16	CT WG4 aspects of 5G System Phase 1
TR 29.892	REL 16	Study on User-plane Protocol in 5GC
TR 29.893	REL 18	Study on IETF QUIC Transport for 5GC Service Based Interfaces


TR 29.903	REL 5 → 6	Feasibility Study on SS7 Signalling Transport in the Core Network with SUA layer
TR 29.909	REL 8 → 18	Diameter-based Protocols Usage and Recommendations in 3GPP
TR 29.935	REL 11 → 18	Study on User Data Convergence (UDC) Data Model
TR 29.941	REL 17 → 18	Guidelines on Port Allocation for New 3GPP Interfaces
TR 29.949	REL 12 → 18	Study on Technical aspects on Roaming End-to-End Scenarios with VoLTE IMS and other Networks
TR 29.962	REL 6	Signalling Interworking between the 3GPP Profile of the SIP and non-3GPP SIP Usage
TR 29.994	REL 3 → 18	Recommended Infrastructure Measures to overcome Specific MS and UE Faults
TR 29.998	REL 3	Open Services Architecture (OSA) Application Programming Interface (API) Part 2
TR 29.998-01	REL 4 → 9	OSA API, Part 1: General Issues on API Mapping
TR 29.998-04-1	REL 4 → 9	OSA API, Part 4: Call Control Service Mapping – Subpart 1: API to CAP Mapping
TR 29.998-04-4	REL 5 → 9	OSA API, Part 4: Call Control Service Mapping – Subpart 4: Multiparty Call Control ISC
TR 29.998-05-1	REL 4 → 9	OSA API, Part 5: User Interaction Service Mapping – Subpart 1: API to CAP Mapping
TR 29.998-05-4	REL 4 → 9	OSA API, Part 5: User Interaction Service Mapping – Subpart 4: API to SMS Mapping
TR 29.998-06	REL 4 → 6	OSA API, Part 6: User Location and User Status Service Mapping to MAP
TR 29.998-06-1	REL 7 → 9	OSA API, Part 6: User Location – Subpart 1: Mapping to MAP
TR 29.998-06-2	REL 7 → 9	Subpart 2: Mapping to SIP
TR 29.998-08	REL 4 → 9	OSA API, Part 8: Data Session Control Service Mapping to CAP