3GPP 24-series – UE-to-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 Q4-2025 Plenary Meetings. The new ones are displayed with a single red dotted overline.

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click here to see the new 24-series documents introduced at each 3GPP quarterly Plenary Meeting

24.0… 24.1… 24.2… 24.3… 24.4… 24.5… 24.6… 24.8… 24.9…

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13 p.	TS 24.002	REL 3 → 19	GSM-UMTS PLMN Access Reference Configuration
158 p.	TS 24.007	REL 3 → 19	Mobile Radio Interface Layer 3 – General Aspects
831 p.	TS 24.008	REL 3 → 19	Mobile Radio Interface Layer 3 – Core Network Protocols
33 p.	TS 24.010	REL 3 → 19	Mobile Radio Interface Layer 3 – Supplementary services
151 p.	TS 24.011	REL 3 → 19	Point-to-Point SMS support on Mobile Radio Interface
66 p.	TS 24.022	REL 3 → 19	RLP – Radio Link Protocol for Circuit Switched Bearer and Teleservices
16 p.	TS 24.030	REL 3 → 19	LCS – Location Services Operations
15 p.	TS 24.067	REL 3 → 19	eMLPP – enhanced Multi-Level Precedence and Pre-emption
10 p.	TS 24.072	REL 3 → 19	CD – Call Deflection
64 p.	TS 24.080	REL 3 → 19	Mobile Radio Layer 3 Supplementary Services – Formats and Coding
14 p.	TS 24.081	REL 3 → 19	CLIP/CLIR/COLP/COLR – Line Identification
37 p.	TS 24.082	REL 3 → 19	CF – Call Forwarding
18 p.	TS 24.083	REL 3 → 19	CW/HOLD – Call Waiting and Call Hold
16 p.	TS 24.084	REL 3 → 19	MPTY – MultiParty
12 p.	TS 24.085	REL 3 → 19	CUG – Closed User Group
13 p.	TS 24.086	REL 3 → 19	AoC – Advice of Charge
28 p.	TS 24.087	REL 3 → 19	UUS – User-to-User Signalling
18 p.	TS 24.088	REL 3 → 19	CB – Call Barring
15 p.	TS 24.090	REL 3 → 19	USSD – Unstructured Supplementary Service Data
13 p.	TS 24.091	REL 3 → 19	ECT – Explicit Call Transfer
24 p.	TS 24.093	REL 3 → 19	CCBS – Completion of Calls to Busy Subscriber
10 p.	TS 24.096	REL 3 → 19	CNAP – Calling Name Presentation


39 p.	TS 24.103	REL 12 → 19	Telepresence using IMS
18 p.	TS 24.105	REL 13 → 19	ACDC Management Object
89 p.	TS 24.109	REL 6 → 19	GAA – Bootstrapping interface (Ub) and NAF interface (Ua)
11 p.	TS 24.116	REL 14 → 19	Stage 3 aspects of System Architecture enhancements for TV Services
19 p.	TS 24.117	REL 14 → 19	TV Service configuration Management Object
15 p.	TS 24.135	REL 3 → 19	MC – Multicall
21 p.	TS 24.139	REL 11 → 19	3GPP System - Fixed Broadband Access Network Interworking
133 p.	TS 24.141	REL 6 → 19	Presence Service using IMS
212 p.	TS 24.147	REL 6 → 19	Conferencing using IMS
53 p.	TS 24.161	REL 13 → 19	Network-Based IP Flow Mobility (NBIFOM)
14 p.	TS 24.166	REL 9 → 19	IMS Conferencing Management Object
117 p.	TS 24.167	REL 6 → 19	IMS Management Object
19 p.	TS 24.171	REL 9 → 19	Control Plane LCS procedures in the EPS
41 p.	TS 24.173	REL 7 → 19	MTSI – Multimedia Telephony Service for IMS
42 p.	TS 24.174	REL 16 → 19	Support of multi-device and multi-identity in the IMS
26 p.	TS 24.175	REL 16 → 19	Management Object for multi-device and multi-identity in the IMS
162 p.	TS 24.182	REL 8 → 19	CAT – Customized Alerting Tones
66 p.	TS 24.183	REL 9 → 19	IMS Customized Ringing Signal – Protocol specification
77 p.	TS 24.186	REL 18 → 19	IMS Data Channel applications – Protocol specification
107 p.	TS 24.193	REL 16 → 19	5G System – Access Traffic Steering, Switching and Splitting (ATSSS)
15 p.	TS 24.196	REL 15 → 19	Enhanced Calling Name (eCNAM)


122 p.	TS 24.206	REL 7	VCC – Voice Call Continuity
29 p.	TS 24.216	REL 7 → 19	Communication Continuity Management Object
715 p.	TS 24.228	REL 5	Signalling Flows for IMS Call Control based on SIP and SDP
1175 p.	TS 24.229	REL 5 → 19	IMS Call Control Protocol based on SIP and SDP
42 p.	TS 24.234	REL 6 → 12	I-WLAN – WLAN UE to Network Protocols
22 p.	TS 24.235	REL 10 → 12	I-WLAN Management Object
512 p.	TS 24.237	REL 8 → 19	IMS Service Continuity
15 p.	TS 24.238	REL 8 → 19	SIP-based User Configuration
26 p.	TS 24.239	REL 8 → 19	IMS Flexible Alerting supplementary service
72 p.	TS 24.244	REL 12 → 19	Wireless LAN Control Plane protocol for Trusted WLAN Access to EPC
78 p.	TS 24.247	REL 6 → 19	Messaging Service using IMS
39 p.	TS 24.250	REL 14 → 19	Protocol for Reliable Communication Service between UE and SCEF
54 p.	TS 24.257	REL 17 → 19	Uncrewed Aerial System (UAS) Application Enabler (UAE) layer
80 p.	TS 24.259	REL 8 → 19	PNM – Personal Network Management
23 p.	TS 24.275	REL 14 → 19	Management Object for Basic Communication Part (BCP) of MMTEL Communication Service
80 p.	TS 24.279	REL 7 → 19	CSICS – CS-IMS Combinational Services
655 p.	TS 24.281	REL 14 → 19	MCVideo Signalling Control
656 p.	TS 24.282	REL 14 → 19	MCData Signalling Control
95 p.	TS 24.283	REL 19	Mission Critical Location Management (MCLoc)
18 p.	TS 24.285	REL 8 → 19	Allowed CSG List Management Object
12 p.	TS 24.286	REL 8 → 19	ICS Management Object
187 p.	TS 24.292	REL 8 → 19	ICS – IMS Centralized Services
87 p.	TS 24.294	REL 9 → 19	ICS protocol via I1 interface


666 p.	TS 24.301	REL 8 → 19	Non-Access-Stratum (NAS) Protocol for EPS
192 p.	TS 24.302	REL 8 → 19	Access to EPC via non-3GPP Access Networks
53 p.	TS 24.303	REL 8 → 19	Mobility Management based on Dual-Stack Mobile IPv6
14 p.	TS 24.304	REL 8 → 19	Mobility management based on Mobile IPv4 – User Equipment – Foreign Agent interface
31 p.	TS 24.305	REL 7 → 19	Selective Disabling of 3GPP User Equipment Capabilities (SDoUE) Management Object
396 p.	TS 24.312	REL 8 → 19	ANDSF Management Object
17 p.	TS 24.315	REL 11 → 19	IMS Operator Determined Barring (ODB)
14 p.	TS 24.322	REL 12 → 19	Tunnelling of IMS Services over Restrictive Access Networks
45 p.	TS 24.323	REL 14 → 19	IMS Trace Management Object
27 p.	TS 24.327	REL 8 → 12	Mobility between 3GPP I-WLAN and 3GPP Systems – GPRS and 3GPP I-WLAN aspects
126 p.	TS 24.333	REL 12 → 19	ProSe Management Object
269 p.	TS 24.334	REL 12 → 19	ProSe UE to ProSe Function protocol aspects
252 p.	TS 24.337	REL 10 → 19	IMS inter-UE Transfer
63 p.	TS 24.341	REL 7 → 19	Support of SMS over IP Networks
65 p.	TS 24.368	REL 10 → 19	NAS Configuration Management Object
40 p.	TS 24.371	REL 12 → 19	WebRTC Access to IMS
824 p.	TS 24.379	REL 13 → 19	MCPTT Call Control
310 p.	TS 24.380	REL 13 → 19	MCPTT Media Plane Control
11 p.	TS 24.381	REL 13	MCPTT Group Management (replaced by TS 24.481)
9 p.	TS 24.382	REL 13	MCPTT Identity Management (replaced by TS 24.482)
11 p.	TS 24.383	REL 13	MCPTT Management Object (replaced by TS 24.483)
10 p.	TS 24.384	REL 13	MCPTT Configuration Management (replaced by TS 24.484)
136 p.	TS 24.385	REL 14 → 19	V2X services Management Object
41 p.	TS 24.386	REL 14 → 19	UE to V2X control function
52 p.	TS 24.390	REL 11 → 19	USSD using IMS
18 p.	TS 24.391	REL 12 → 19	USSD using IMS Management Object


103 p.	TS 24.403	REL 7	TISPAN – IP Multimedia Call Control Protocol based on SIP and SDP Stage 3 [3GPP TS 24.229 (Release 7), modified]
55 p.	TS 24.404	REL 7	TISPAN; PSTN/ISDN simulation services: CDIV
21 p.	TS 24.405	REL 7	TISPAN; PSTN/ISDN simulation services: CONF
30 p.	TS 24.406	REL 7 → 8	TISPAN; PSTN/ISDN simulation services: MWI
23 p.	TS 24.407	REL 7 → 8	TISPAN; PSTN/ISDN simulation services: OIP and OIR
21 p.	TS 24.408	REL 7	TISPAN; PSTN/ISDN simulation services: TIP and TIR
18 p.	TS 24.410	REL 7 → 8	TISPAN; PSTN/ISDN simulation services: HOLD
22 p.	TS 24.411	REL 7 → 8	TISPAN; PSTN/ISDN simulation services: ACR and CB
19 p.	TS 24.416	REL 7	TISPAN; PSTN/ISDN simulation services: MCID
14 p.	TS 24.417	REL 14 → 19	Management Object for OIP and OIR using IMS
19 p.	TS 24.423	REL 7 → 8	TISPAN; PSTN/ISDN simulation services: XCAP over the Ut interface for Manipulating NGN PSTN/ISDN Simulation Services
25 p.	TS 24.424	REL 14 → 19	Management Object for XCAP over the Ut interface for Manipulating Supplementary Services
39 p.	TS 24.428	REL 7	Common Basic Communication procedures
26 p.	TS 24.429	REL 7	PSTN/ISDN simulation services: ECT
13 p.	TS 24.430	REL 7 → 8	Presence Service Capability
8 p.	TS 24.441	REL 7 → 8	Messaging service using IMS
32 p.	TS 24.447	REL 8	NGN IMS Supplementary Services – AOC
10 p.	TS 24.451	REL 8	Support of SMS and MMS over NGN IMS subsystem
23 p.	TS 24.454	REL 8	PSTN/ISDN simulation services: CUG
91 p.	TS 24.481	REL 13 → 19	MCS Group Management
17 p.	TS 24.482	REL 13 → 19	MCS Identity Management
501 p.	TS 24.483	REL 13 → 19	MCS Management Object
265 p.	TS 24.484	REL 13 → 19	MCS Configuration Management
84 p.	TS 24.486	REL 16 → 19	V2X Application Enabler (VAE) layer


1303 p.	TS 24.501	REL 15 → 19	Non-Access-Stratum (NAS) Protocol for 5GS
116 p.	TS 24.502	REL 15 → 19	Access to 5GS via non-3GPP Access Networks
335 p.	TS 24.503	REL 8	TISPAN; IP Multimedia Call Control Protocol based on SIP and SDP Stage 3 [3GPP TS 24.229 (Release 7), modified]
63 p.	TS 24.504	REL 8	TISPAN; PSTN/ISDN simulation services: CDIV
26 p.	TS 24.505	REL 8	TISPAN; PSTN/ISDN simulation services: CONF
25 p.	TS 24.508	REL 8	TISPAN; PSTN/ISDN simulation services: TIP and TIR
111 p.	TS 24.514	REL 18 → 19	Ranging based services and Sidelink Positioning in 5GS
27 p.	TS 24.516	REL 8	TISPAN; PSTN/ISDN simulation services: MCID
8 p.	TS 24.519	REL 16 → 17	5GS – DS-TT to NW-TT protocol aspects → content continues in TS 24.539 starting from Rel-17
31 p.	TS 24.523	REL 12 → 19	Core and Enterprise NGN Interaction Scenarios
24 p.	TS 24.524	REL 12 → 19	Hosted Enterprise Services
51 p.	TS 24.525	REL 12 → 19	Business Trunking
74 p.	TS 24.526	REL 15 → 19	UE Policies for 5GS
52 p.	TS 24.528	REL 8	TISPAN; Common Basic Communication procedures
27 p.	TS 24.529	REL 8	TISPAN; PSTN/ISDN simulation services: ECT
12 p.	TS 24.535	REL 16 → 19	5GS – DS-TT to NW-TT protocol aspects
108 p.	TS 24.538	REL 17 → 19	Enabling MSGin5G Service
126 p.	TS 24.539	REL 17 → 19	5GS – NW-TT
23 p.	TS 24.542	REL 18 → 19	SEAL Notification Management
173 p.	TS 24.543	REL 18 → 19	SEAL Data Delivery Management
68 p.	TS 24.544	REL 16 → 19	SEAL Group Management
151 p.	TS 24.545	REL 16 → 19	SEAL Location Management
59 p.	TS 24.546	REL 16 → 19	SEAL Configuration Management
23 p.	TS 24.547	REL 16 → 19	SEAL Identity Management
107 p.	TS 24.548	REL 16 → 19	SEAL Network Resource Management
43 p.	TS 24.549	REL 17 → 19	SEAL Network Slice Capability Enablement
617 p.	TS 24.554	REL 17 → 19	ProSe in 5GS
224 p.	TS 24.555	REL 17 → 19	ProSe in 5GS: UE Policies
165 p.	TS 24.558	REL 17 → 19	Enabling Edge Applications
59 p.	TS 24.559	REL 18 → 19	Application Data Analytics Enablement Service (ADAES)
56 p.	TS 24.571	REL 16 → 19	5GS – Control Plane LCS procedures
50 p.	TS 24.572	REL 18 → 19	5GS – User Plane LCS procedures
23 p.	TS 24.575	REL 18 → 19	5GS – Multicast/Broadcast UE pre-configuration Management Object
126 p.	TS 24.577	REL 18 → 19	A2X services in 5GS
85 p.	TS 24.578	REL 18 → 19	A2X services in 5GS: UE Policies
245 p.	TS 24.581	REL 14 → 19	MCVideo Media Plane Control
61 p.	TS 24.582	REL 14 → 19	MCData Media Plane Control
212 p.	TS 24.583	REL 18 → 19	Application Layer support for Personal IoT Network (PINAPP)
135 p.	TS 24.587	REL 16 → 19	V2X services in 5GS
85 p.	TS 24.588	REL 16 → 19	V2X services in 5GS: UE policies


62 p.	TS 24.604	REL 8 → 19	CDIV using IMS
28 p.	TS 24.605	REL 8 → 19	CONF using IMS
29 p.	TS 24.606	REL 8 → 19	MWI using IMS
24 p.	TS 24.607	REL 8 → 19	OIP and OIR using IMS
21 p.	TS 24.608	REL 8 → 19	TIP and TIR using IMS
29 p.	TS 24.610	REL 8 → 19	HOLD using IMS
31 p.	TS 24.611	REL 8 → 19	ACR and CB using IMS
31 p.	TS 24.615	REL 8 → 19	CW using IMS
26 p.	TS 24.616	REL 8 → 19	MCID using IMS
35 p.	TS 24.623	REL 8 → 19	XCAP over the Ut interface for manipulating Supplementary Services
64 p.	TS 24.628	REL 8 → 19	Common Basic Communication procedures using IMS
31 p.	TS 24.629	REL 8 → 19	ECT using IMS
57 p.	TS 24.642	REL 8 → 19	CCBS and CCNR using IMS
40 p.	TS 24.647	REL 8 → 19	AOC using IMS
24 p.	TS 24.654	REL 8 → 19	CUG using IMS


215 p.	TR 24.801	REL 8	3GPP System Architecture Evolution (SAE) – CT WG1 aspects
64 p.	TR 24.802	REL 12	Indication of NNI Routeing Scenarios in SIP Requests in the IMS
40 p.	TR 24.803	REL 12	Study on Telepresence using IMS
112 p.	TR 24.811	REL 17	Study on the CT aspects of Support for Minimization of Service Interruption
26 p.	TR 24.812	REL 19	Study on MINT support in EPS for 5G-only national roaming UE
54 p.	TR 24.819	REL 7	Protocol Impact from Providing IMS Services via Fixed Broadband
21 p.	TR 24.820	REL 11	3GPP System to Fixed Broadband Access Network Interworking – UE to Network protocols
48 p.	TR 24.821	REL 17	Study on PLMN selection for Satellite Access
33 p.	TR 24.826	REL 11	Impacts on Signalling between UE and Core Network from Energy Saving
361 p.	TR 24.837	REL 10	IMS inter-UE Transfer enhancements
150 p.	TR 24.841	REL 6	Presence Service based on SIP – Functional Models, Information Flows and Protocol Details
73 p.	TR 24.879	REL 7	Combining CS Calls and IMS Sessions
52 p.	TR 24.880	REL 8	Media Server Control using the IP Multimedia (IM) Core Network (CN) Subsystem
218 p.	TR 24.883	REL 16	MC Systems Connection to LMR Systems
310 p.	TR 24.890	REL 15 → 16	CT WG1 aspects of 5G System Phase 1


161 p.	TR 24.930	REL 7 → 19	Signalling Flows for Session Setup in IMS based on SIP and SDP
74 p.	TR 24.969	REL 12 → 19	Business Trunking – NGCN-NGN Interfaces Implementation Guide
15 p.	TR 24.980	REL 13 → 16	Minimum Requirements for support of MCPTT Service over the Gm reference point