ETSI TS 129 503 V17.21.0 (2026-02)

5G; 5G System; Unified Data Management Services; Stage 3 (3GPP TS 29.503 version 17.21.0 Release 17)

RTS/TSGC-0429503vhl0

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 4 - MAP/CAMEL/GTP/BCH/SS/TrFO/IMS/GUP/WLAN (formely CN4)
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 06-Feb-2026

Standards Content (Sample)

TECHNICAL SPECIFICATION
5G;
5G System;
Unified Data Management Services;
Stage 3
(3GPP TS 29.503 version 17.21.0 Release 17)


3GPP TS 29.503 version 17.21.0 Release 17 1 ETSI TS 129 503 V17.21.0 (2026-02)

Reference
RTS/TSGC-0429503vhl0
Keywords
5G
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ETSI
3GPP TS 29.503 version 17.21.0 Release 17 2 ETSI TS 129 503 V17.21.0 (2026-02)
Contents
1 Scope . 22
2 References . 22
3 Definitions and abbreviations . 24
3.1 Definitions . 24
3.2 Abbreviations . 24
4 Overview . 25
4.1 Introduction . 25
5 Services offered by the UDM . 26
5.1 Introduction . 26
5.2 Nudm_SubscriberDataManagement Service . 28
5.2.1 Service Description . 28
5.2.2 Service Operations . 28
5.2.2.1 Introduction . 28
5.2.2.2 Get . 29
5.2.2.2.1 General . 29
5.2.2.2.2 Slice Selection Subscription Data Retrieval . 30
5.2.2.2.3 Access and Mobility Subscription Data Retrieval . 30
5.2.2.2.4 SMF Selection Subscription Data Retrieval . 31
5.2.2.2.5 Session Management Subscription Data Retrieval . 32
5.2.2.2.6 SMS Subscription Data Retrieval . 32
5.2.2.2.7 SMS Management Subscription Data Retrieval . 33
5.2.2.2.8 UE Context In SMF Data Retrieval . 33
5.2.2.2.9 Retrieval Of Multiple Data Sets . 34
5.2.2.2.10 Identifier Translation . 34
5.2.2.2.11 Shared Subscription Data Retrieval . 35
5.2.2.2.12 UE Context In SMSF Data Retrieval. 36
5.2.2.2.13 Trace data Retrieval . 36
5.2.2.2.14 Group Identifier Translation . 37
5.2.2.2.15 LCS Privacy Data Retrieval . 38
5.2.2.2.16 LCS Mobile Originated Data Retrieval . 38
5.2.2.2.17 Enhanced Coverage Restriction Data Retrieval . 39
5.2.2.2.18 V2X Subscription Data Retrieval . 40
5.2.2.2.19 LCS Broadcast Assistance Subscription Data Retrieval . 40
5.2.2.2.20 UE Context In AMF Data Retrieval . 41
5.2.2.2.21 Individual Shared Subscription Data Retrieval . 41
5.2.2.2.22 Prose Subscription Data Retrieval . 42
5.2.2.2.23 5MBS Subscription Data Retrieval . 42
5.2.2.2.24 User Consent Subscription Data Retrieval . 42
5.2.2.2.25 Multiple Identifiers Translation . 43
5.2.2.3 Subscribe . 43
5.2.2.3.1 General . 43
5.2.2.3.2 Subscription to notifications of data change . 44
5.2.2.3.3 Subscription to notifications of shared data change . 44
5.2.2.4 Unsubscribe . 45
5.2.2.4.1 General . 45
5.2.2.4.2 Unsubscribe to notifications of data change . 45
5.2.2.4.3 Unsubscribe to notifications of shared data change . 46
5.2.2.5 Notification . 46
5.2.2.5.1 General . 46
5.2.2.5.2 Data Change Notification To NF . 46
5.2.2.5.3 UDR-initiated Data Restoration Notification . 47
5.2.2.6 Info . 48
5.2.2.6.1 General . 48
5.2.2.6.2 Providing acknowledgement of Steering of Roaming . 48
5.2.2.6.3 Providing acknowledgement of UE parameters update . 49
5.2.2.6.4 Providing acknowledgement of UE for Network Slicing Subscription Change . 49
ETSI
3GPP TS 29.503 version 17.21.0 Release 17 3 ETSI TS 129 503 V17.21.0 (2026-02)
5.2.2.6.5 Providing acknowledgement of UE for CAG configuration change . 49
5.2.2.6.6 Triggering Update of Steering Of Roaming information . 50
5.2.2.7 ModifySubscription. 50
5.2.2.7.1 General . 50
5.2.2.7.2 Modification of a subscription to notifications of data change . 51
5.2.2.7.3 Modification of a subscription to notifications of shared data change . 51
5.3 Nudm_UEContextManagement Service . 52
5.3.1 Service Description . 52
5.3.2 Service Operations . 52
5.3.2.1 Introduction . 52
5.3.2.2 Registration . 53
5.3.2.2.1 General . 53
5.3.2.2.2 AMF registration for 3GPP access . 53
5.3.2.2.3 AMF registration for non 3GPP access . 55
5.3.2.2.4 SMF registration . 55
5.3.2.2.5 SMSF Registration for 3GPP Access . 56
5.3.2.2.6 SMSF Registration for Non 3GPP Access . 57
5.3.2.2.7 IP-SM-GW registration . 58
5.3.2.2.8 NWDAF registration . 58
5.3.2.3 DeregistrationNotification . 59
5.3.2.3.1 General . 59
5.3.2.3.2 UDM initiated NF Deregistration . 59
5.3.2.4 Deregistration . 60
5.3.2.4.1 General . 60
5.3.2.4.2 AMF deregistration for 3GPP access . 60
5.3.2.4.3 AMF deregistration for non-3GPP access . 61
5.3.2.4.4 SMF deregistration . 62
5.3.2.4.5 SMSF Deregistration for 3GPP Access . 62
5.3.2.4.6 SMSF Deregistration for Non 3GPP Access . 63
5.3.2.4.7 IP-SM-GW deregistration. 63
5.3.2.4.8 NWDAF deregistration . 64
5.3.2.5 Get . 64
5.3.2.5.1 General . 64
5.3.2.5.2 Amf3GppAccessRegistration Information Retrieval . 64
5.3.2.5.3 AmfNon3GppAccessRegistration Information Retrieval . 65
5.3.2.5.4 Void . 65
5.3.2.5.5 SmsfRegistration Information Retrieval for 3GPP Access . 65
5.3.2.5.6 SmsfRegistration Information Retrieval for Non-3GPP Access . 66
5.3.2.5.7 SmfRegistration Information Retrieval . 67
5.3.2.5.8 Individual SmfRegistration Information Retrieval . 67
5.3.2.5.9 Location Information Retrieval . 68
5.3.2.5.10 Retrieval Of Multiple UE Registration Data Sets . 68
5.3.2.5.11 IP-SM-GW Registration Information Retrieval . 69
5.3.2.5.12 NwdafRegistration Information Retrieval . 69
5.3.2.6 Update . 70
5.3.2.6.1 General . 70
5.3.2.6.2 Update A Parameter (e.g. PEI) in the AMF Registration For 3GPP Access . 70
5.3.2.6.3 Update A Parameter (e.g. PEI) in the AMF Registration For Non 3GPP Access . 70
5.3.2.6.4 Update A Parameter (e.g. analyticsId(s)) in the NWDAF Registration . 71
5.3.2.6.5 Update A Parameter (e.g. PGW FQDN) in the SMF Registration . 72
5.3.2.7 P-CSCF-RestorationNotification . 72
5.3.2.7.1 General . 72
5.3.2.7.2 UDM initiated P-CSCF-Restoration . 73
5.3.2.8 P-CSCF-RestorationTrigger . 73
5.3.2.8.1 General . 73
5.3.2.8.2 P-CSCF-RestorationTrigger . 73
5.3.2.9 AMFDeregistration . 74
5.3.2.9.1 General . 74
5.3.2.9.2 AMF-Deregistration . 74
5.3.2.10 PEI-Update . 74
5.3.2.10.1 General . 74
5.3.2.10.2 PEI Update . 74
ETSI
3GPP TS 29.503 version 17.21.0 Release 17 4 ETSI TS 129 503 V17.21.0 (2026-02)
5.3.2.11 Roaming Information Update. 75
5.3.2.11.1 General . 75
5.3.2.11.2 Roaming Information Update . 75
5.3.2.12 DataRestorationNotification. 75
5.3.2.12.1 General . 75
5.3.2.12.2 UDR-initiated Data Restoration . 76
5.3.2.13 SendRoutingInfoForSM . 76
5.3.2.13.1 General . 76
5.3.2.13.2 Send Routing Information For SM . 76
5.4 Nudm_UEAuthentication Service . 77
5.4.1 Service Description . 77
5.4.2 Service Operations . 77
5.4.2.1 Introduction . 77
5.4.2.2 Get . 78
5.4.2.2.1 General . 78
5.4.2.2.2 Authentication Information Retrieval . 78
5.4.2.2.3 FN-RG Authentication . 79
5.4.2.3 ResultConfirmationInform . 80
5.4.2.3.1 General . 80
5.4.2.3.2 Authentication Confirmation . 80
5.4.2.3.3 Authentication Result Removal . 80
5.4.2.4 GetHssAv . 81
5.4.2.4.1 General . 81
5.4.2.4.2 HSS Authentication Vector Retrieval . 81
5.4.2.5 GetGbaAv . 81
5.4.2.5.1 General . 81
5.4.2.5.2 GBA Authentication Vector Retrieval . 82
5.4.2.6 GetProseAv . 82
5.4.2.6.1 General . 82
5.4.2.6.2 ProSe Authentication Vector Retrieval . 82
5.4.2.7 Notification . 83
5.4.2.7.1 General . 83
5.4.2.7.2 UDR-initiated Data Restoration Notification . 83
5.5 Nudm_EventExposure Service . 84
5.5.1 Service Description . 84
5.5.2 Service Operations . 84
5.5.2.1 Introduction . 84
5.5.2.2 Subscribe . 84
5.5.2.2.1 General . 84
5.5.2.2.2 Subscription to Notification of event occurrence . 84
5.5.2.2.3 Void . 86
5.5.2.3 Unsubscribe . 86
5.5.2.3.1 General . 86
5.5.2.3.2 Unsubscribe to notifications of event occurrence . 87
5.5.2.4 Notify . 87
5.5.2.4.1 General . 87
5.5.2.4.2 Event Occurrence Notification . 87
5.5.2.4.3 Monitoring Revocation Notification. 88
5.5.2.4.4 UDR-initiated Data Restoration . 89
5.5.2.5 ModifySubscription. 89
5.5.2.5.1 General . 89
5.5.2.5.2 Modification of a subscription . 89
5.5.2.5.3 Remove or add group member UE(s) for a group subscription . 90
5.6 Nudm_ParameterProvision Service . 91
5.6.1 Service Description . 91
5.6.2 Service Operations . 91
5.6.2.1 Introduction . 91
5.6.2.2 Update . 91
5.6.2.2.1 General . 91
5.6.2.2.2 Subscription data update . 92
5.6.2.2.3 5G VN Group modification . 92
5.6.2.2.4 SoR Information update. 93
ETSI
3GPP TS 29.503 version 17.21.0 Release 17 5 ETSI TS 129 503 V17.21.0 (2026-02)
5.6.2.2.5 Parameter Provisioning Data Entry per AF update . 94
5.6.2.2.6 5G-MBS-Group modification . 94
5.6.2.3 Create . 95
5.6.2.3.1 General . 95
5.6.2.3.2 5G-VN-Group creation . 95
5.6.2.3.3 Parameter Provisioning Data Entry per AF creation . 96
5.6.2.3.4 5G-MBS-Group creation . 97
5.6.2.4 Delete . 97
5.6.2.4.1 General . 97
5.6.2.4.2 5G-VN-Group deletion . 97
5.6.2.4.3 Parameter Provisioning Data Entry per AF deletion . 98
5.6.2.4.4 5G-MBS-Group deletion . 99
5.6.2.5 Get . 99
5.6.2.5.1 General . 99
5.6.2.5.2 5G-VN-Group get . 99
5.6.2.5.3 Parameter Provisioning Data Entry per AF get . 100
5.6.2.5.4 5G-MBS-Group get . 101
5.7 Nudm_NIDDAuthorization Service . 101
5.7.1 Service Description . 101
5.7.2 Service Operations . 101
5.7.2.1 Introduction . 101
5.7.2.2 Get . 102
5.7.2.2.1 General . 102
5.7.2.2.2 NIDD Authorization Data Retrieval . 102
5.7.2.3 Notification . 103
5.7.2.3.1 General . 103
5.7.2.3.2 NIDD Authorization Data Update Notification . 103
5.8 Nudm_MT Service . 103
5.8.1 Service Description . 103
5.8.2 Service Operations . 103
5.8.2.1 Introduction . 103
5.8.2.2 ProvideUeInfo . 104
5.8.2.2.1 General . 104
5.8.2.2.2 UE Information Retrieval . 104
5.8.2.3 ProvideLocationInfo . 104
5.8.2.3.1 General . 104
5.8.2.3.2 Network Provided Location Information Request . 104
5.9 Nudm_ServiceSpecificAuthorization Service . 105
5.9.1 Service Description . 105
5.9.2 Service Operations . 105
5.9.2.1 Introduction . 105
5.9.2.2 Create . 106
5.9.2.2.1 General . 106
5.9.2.2.2 Service Specific Authorization Data Retrieval . 106
5.9.2.3 UpdateNotify . 107
5.9.2.3.1 General . 107
5.9.2.3.2 Service Specific Authorization Data Update Notification . 107
5.10 Nudm_ReportSMDeliveryStatus Service . 108
5.10.1 Service Description . 108
5.10.2 Service Operations . 108
5.10.2.1 Introduction . 108
5.10.2.2 Request . 108
5.10.2.2.1 General . 108
5.10.2.2.2 Report the SM-Delivery Status . 108
5.11 Nudm_UEIdentifier Service . 109
5.11.1 Service Description . 109
5.11.2 Service Operations . 109
5.11.2.1 Introduction . 109
5.11.2.2 Deconceal . 109
6 API Definitions . 110
6.1 Nudm_SubscriberDataManagement Service API . 110
ETSI
3GPP TS 29.503 version 17.21.0 Release 17 6 ETSI TS 129 503 V17.21.0 (2026-02)
6.1.1 API URI . 110
6.1.2 Usage of HTTP . 110
6.1.2.1 General . 110
6.1.2.2 HTTP standard headers . 110
6.1.2.2.1 General . 110
6.1.2.2.2 Content type . 110
6.1.2.2.3 Cache-Control . 111
6.1.2.2.4 ETag . 111
6.1.2.2.5 If-None-Match . 111
6.1.2.2.6 Last-Modified . 111
6.1.2.2.7 If-Modified-Since . 111
6.1.2.2.8 When to Use Entity-Tags and Last-Modified Dates . 111
6.1.2.3 HTTP custom headers . 111
6.1.2.3.1 General . 111
6.1.3 Resources . 111
6.1.3.1 Overview . 111
6.1.3.2 Resource: Nssai (Document) . 116
6.1.3.2.1 Description . 116
6.1.3.2.2 Resource Definition . 116
6.1.3.2.3 Resource Standard Methods . 116
6.1.3.3 Resource: SdmSubscriptions (Collection) . 117
6.1.3.3.1 Description . 117
6.1.3.3.2 Resource Definition . 117
6.1.3.3.3 Resource Standard Methods . 118
6.1.3.4 Resource: Individual subs
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