ETSI TS 129 520 V19.6.1 (2026-03)

5G; 5G System; Network Data Analytics Services; Stage 3 (3GPP TS 29.520 version 19.6.1 Release 19)

RTS/TSGC-0329520vj61

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 3 - Interworking with external networks (formely CN3)
• Current Stage: 8 - Draft receipt by ETSI Secretariat
• Completion Date: 10-Mar-2026

Standards Content (Sample)

TECHNICAL SPECIFICATION
5G;
5G System;
Network Data Analytics Services;
Stage 3
(3GPP TS 29.520 version 19.6.1 Release 19)


3GPP TS 29.520 version 19.6.1 Release 19 1 ETSI TS 129 520 V19.6.1 (2026-03)

Reference
RTS/TSGC-0329520vj61
Keywords
5G
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ETSI
3GPP TS 29.520 version 19.6.1 Release 19 2 ETSI TS 129 520 V19.6.1 (2026-03)
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ETSI
3GPP TS 29.520 version 19.6.1 Release 19 3 ETSI TS 129 520 V19.6.1 (2026-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 18
1 Scope . 19
2 References . 19
3 Definitions and abbreviations . 20
3.1 Definitions . 20
3.2 Abbreviations . 20
4 Services offered by the NWDAF . 21
4.1 Introduction . 21
4.2 Nnwdaf_EventsSubscription Service . 25
4.2.1 Service Description . 25
4.2.1.1 Overview . 25
4.2.1.2 Service Architecture . 26
4.2.1.3 Network Functions . 27
4.2.1.3.1 Network Data Analytics Function (NWDAF) . 27
4.2.1.3.2 NF Service Consumers . 27
4.2.2 Service Operations . 31
4.2.2.1 Introduction . 31
4.2.2.2 Nnwdaf_EventsSubscription_Subscribe service operation . 31
4.2.2.2.1 General . 31
4.2.2.2.2 Subscription for event notifications . 32
4.2.2.2.3 Update subscription for event notifications . 44
4.2.2.3 Nnwdaf_EventsSubscription_Unsubscribe service operation . 45
4.2.2.3.1 General . 45
4.2.2.3.2 Unsubscribe from event notifications . 46
4.2.2.4 Nnwdaf_EventsSubscription_Notify service operation . 46
4.2.2.4.1 General . 46
4.2.2.4.2 Notification about subscribed event . 46
4.2.2.5 Nnwdaf_EventsSubscription_Transfer service operation . 49
4.2.2.5.1 General . 49
4.2.2.5.2 Creation of request for analytics subscription transfer . 50
4.2.2.5.3 Update a request for analytics subscription transfer . 51
4.2.2.5.4 Cancel a request for analytics subscription transfer . 52
4.3 Nnwdaf_AnalyticsInfo Service . 53
4.3.1 Service Description . 53
4.3.1.1 Overview . 53
4.3.1.2 Service Architecture . 54
4.3.1.3 Network Functions . 55
4.3.1.3.1 Network Data Analytics Function (NWDAF) . 55
4.3.1.3.2 NF Service Consumers . 55
4.3.2 Service Operations . 58
4.3.2.1 Introduction . 58
4.3.2.2 Nnwdaf_AnalyticsInfo_Request service operation . 58
4.3.2.2.1 General . 58
4.3.2.2.2 Request and get from NWDAF Analytics information . 58
4.3.2.3 Nnwdaf_AnalyticsInfo_ContextTransfer service operation . 69
4.3.2.3.1 General . 69
4.3.2.3.2 Request and get from NWDAF context of a subscription . 69
4.4 Nnwdaf_DataManagement Service . 71
4.4.1 Service Description . 71
4.4.1.1 Overview . 71
4.4.1.2 Service Architecture . 71
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4.4.1.3 Network Functions . 72
4.4.1.3.1 Network Data Analytics Function (NWDAF) . 72
4.4.1.3.2 NF Service Consumers . 72
4.4.2 Service Operations . 73
4.4.2.1 Introduction . 73
4.4.2.2 Nnwdaf_DataManagement_Subscribe service operation . 73
4.4.2.2.1 General . 73
4.4.2.2.2 Subscription for data notifications . 73
4.4.2.2.3 Update subscription for data notifications . 75
4.4.2.3 Nnwdaf_DataManagement_Unsubscribe service operation . 77
4.4.2.3.1 General . 77
4.4.2.3.2 Unsubscribe from data notifications . 77
4.4.2.4 Nnwdaf_DataManagement_Notify service operation . 78
4.4.2.4.1 General . 78
4.4.2.4.2 Notification about subscribed data . 78
4.4.2.5 Nnwdaf_DataManagement_Fetch service operation . 80
4.4.2.5.1 General . 80
4.4.2.5.2 Retrieve data from the NWDAF . 80
4.5 Nnwdaf_MLModelProvision Service. 81
4.5.1 Service Description . 81
4.5.1.1 Overview . 81
4.5.1.2 Service Architecture . 81
4.5.1.3 Network Functions . 82
4.5.1.3.1 Network Data Analytics Function (NWDAF) . 82
4.5.1.3.2 NF Service Consumers . 82
4.5.2 Service Operations . 82
4.5.2.1 Introduction . 82
4.5.2.2 Nnwdaf_MLModelProvision_Subscribe service operation . 83
4.5.2.2.1 General . 83
4.5.2.2.2 Subscription for event notifications . 83
4.5.2.2.3 Update subscription for event notifications . 84
4.5.2.3 Nnwdaf_MLModelProvision_Unsubscribe service operation . 86
4.5.2.3.1 General . 86
4.5.2.3.2 Unsubscribe from event notifications . 86
4.5.2.4 Nnwdaf_MLModelProvision_Notify service operation . 86
4.5.2.4.1 General . 86
4.5.2.4.2 Notification about subscribed event . 86
4.6 Nnwdaf_MLModelTraining Service . 88
4.6.1 Service Description . 88
4.6.1.1 Overview . 88
4.6.1.2 Service Architecture . 88
4.6.1.3 Network Functions . 89
4.6.1.3.1 Network Data Analytics Function (NWDAF) . 89
4.6.1.3.2 NF Service Consumers . 89
4.6.2 Service Operations . 89
4.6.2.1 Introduction . 89
4.6.2.2 Nnwdaf_MLModelTraining_Subscribe service operation . 89
4.6.2.2.1 General . 89
4.6.2.2.2 Subscription for event notifications . 89
4.6.2.2.3 Update subscription for event notifications . 91
4.6.2.2.4 Partial update subscription for event notifications . 92
4.6.2.3 Nnwdaf_MLModelTraining_Unsubscribe service operation . 93
4.6.2.3.1 General . 93
4.6.2.3.2 Unsubscribe from event notifications . 93
4.6.2.3.3 Unsubscribe from event notifications providing additional information . 94
4.6.2.4 Nnwdaf_MLModelTraining_Notify service operation . 94
4.6.2.4.1 General . 94
4.6.2.4.2 Notification about subscribed event . 94
4.7 Nnwdaf_MLModelMonitor Service . 95
4.7.1 Service Description . 95
4.7.1.1 Overview . 95
4.7.1.2 Service Architecture . 96
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4.7.1.3 Network Functions . 97
4.7.1.3.1 Network Data Analytics Function (NWDAF) . 97
4.7.1.3.2 NF Service Consumers . 97
4.7.2 Service Operations . 97
4.7.2.1 Introduction . 97
4.7.2.2 Nnwdaf_MLModelMonitor_Register service operation . 97
4.7.2.2.1 General . 97
4.7.2.2.2 Registering the monitoring of the analytics accuracy of an ML Model . 97
4.7.2.3 Nnwdaf_MLModelMonitor_Deregister service operation . 99
4.7.2.3.1 General . 99
4.7.2.3.2 Deregistering the monitoring of the analytics accuracy of an ML Model . 99
4.7.2.4 Nnwdaf_MLModelMonitor_Subscribe service operation. 99
4.7.2.4.1 General . 99
4.7.2.4.2 Subscription for monitoring notifications . 100
4.7.2.4.3 Update of subscription for monitoring notifications . 101
4.7.2.5 Nnwdaf_MLModelMonitor_Unsubscribe service operation . 102
4.7.2.5.1 General . 102
4.7.2.5.2 Unsubscribe from monitoring notifications . 102
4.7.2.6 Nnwdaf_MLModelMonitor_Notify service operation . 102
4.7.2.6.1 General . 102
4.7.2.6.2 Notification about subscribed event . 102
4.8 Nnwdaf_RoamingData Service . 103
4.8.1 Service Description . 103
4.8.1.1 Overview . 103
4.8.1.2 Service Architecture . 104
4.8.1.3 Network Functions . 104
4.8.1.3.1 Network Data Analytics Function (NWDAF) . 104
4.8.1.3.2 NF Service Consumers . 104
4.8.2 Service Operations . 105
4.8.2.1 Introduction . 105
4.8.2.2 Nnwdaf_RoamingData_Subscribe service operation . 105
4.8.2.2.1 General . 105
4.8.2.2.2 Subscription for event notifications . 105
4.8.2.2.3 Update of subscription for event notifications . 106
4.8.2.3 Nnwdaf_RoamingData_Unsubscribe service operation . 108
4.8.2.3.1 General . 108
4.8.2.3.2 Unsubscribe from event notifications . 108
4.8.2.4 Nnwdaf_RoamingData_Notify service operation . 108
4.8.2.4.1 General . 108
4.8.2.4.2 Notification about subscribed event . 108
4.9 Nnwdaf_RoamingAnalytics Service . 109
4.9.1 Service Description . 109
4.9.1.1 Overview . 109
4.9.1.2 Service Architecture . 109
4.9.1.3 Network Functions . 110
4.9.1.3.1 Network Data Analytics Function (NWDAF) . 110
4.9.1.3.2 NF Service Consumers . 110
4.9.2 Service Operations . 111
4.9.2.1 Introduction . 111
4.9.2.2 Nnwdaf_RoamingAnalytics_Subscribe service operation . 111
4.9.2.2.1 General . 111
4.9.2.2.2 Subscription for event notifications . 111
4.9.2.2.3 Update subscription for event notifications . 112
4.9.2.3 Nnwdaf_RoamingAnalytics_Unsubscribe service operation . 114
4.9.2.3.1 General . 114
4.9.2.3.2 Unsubscribe from event notifications . 114
4.9.2.4 Nnwdaf_RoamingAnalytics_Notify service operation . 114
4.9.2.4.1 General . 114
4.9.2.4.2 Notification about subscribed event . 115
4.10 Nnwdaf_VFLTraining Service . 116
4.10.1 Service Description . 116
4.10.1.1 Overview . 116
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4.10.1.2 Service Architecture . 116
4.10.1.3 Network Functions . 117
4.10.1.3.1 Network Data Analytics Function (NWDAF) . 117
4.10.1.3.2 NF Service Consumers . 117
4.10.2 Service Operations . 117
4.10.2.1 Introduction . 117
4.10.2.2 Nnwdaf_VFLTraining_Subscribe service operation . 117
4.10.2.2.1 General . 117
4.10.2.2.2 Subscription for VFL training information . 117
4.10.2.2.3 Update of subscription for VFL training information. 118
4.10.2.2.4 Partial update subscription for VFL training information . 119
4.10.2.3 Nnwdaf_VFLTraining_Unsubscribe service operation. 120
4.10.2.3.1 General . 120
4.10.2.3.2 Unsubscribe from VFL training information . 120
4.10.2.4 Nnwdaf_VFLTraining_Notify service operation . 121
4.10.2.4.1 General . 121
4.10.2.4.2 Notification about VFL training information . 121
4.11 Nnwdaf_VFLInference Service . 121
4.11.1 Service Description . 121
4.11.1.1 Overview . 121
4.11.1.2 Service Architecture . 122
4.11.1.3 Network Functions . 122
4.11.1.3.1 Network Data Analytics Function (NWDAF) . 122
4.11.1.3.2 NF Service Consumers . 122
4.11.2 Service Operations . 123
4.11.2.1 Introduction . 123
4.11.2.2 Nnwdaf_VFLInference_Subscribe service operation . 123
4.11.2.2.1 General . 123
4.11.2.2.2 Subscription for VFL inference event notifications. 123
4.11.2.2.3 Update subscription for event notifications . 124
4.11.2.2.4 Partial update subscription for event notifications . 125
4.11.2.3 Nnwdaf_VFLInference_Unsubscribe service operation . 126
4.11.2.3.1 General . 126
4.11.2.3.2 Unsubscribe from VFL inference notifications . 126
4.11.2.4 Nnwdaf_VFLInference_Notify service operation . 127
4.11.2.4.1 General . 127
4.11.2.4.2 Notification about subscribed event . 127
5 API Definitions . 127
5.1 Nnwdaf_EventsSubscription Service API . 127
5.1.1 Introduction. 127
5.1.2 Usage of HTTP . 128
5.1.2.1 General . 128
5.1.2.2 HTTP standard headers . 128
5.1.2.2.1 General . 128
5.1.2.2.2 Content type . 128
5.1.2.3 HTTP custom headers . 128
5.1.3 Resources . 128
5.1.3.1 Resource Structure . 128
5.1.3.2 Resource: NWDAF Events Subscriptions . 129
5.1.3.2.1 Description . 129
5.1.3.2.2 Resource definition . 129
5.1.3.2.3 Resource Standard Methods . 130
5.1.3.2.4 Resource Custom Operations . 130
5.1.3.3 Resource: Individual NWDAF Event Subscription . 131
5.1.3.3.1 Description . 131
5.1.3.3.2 Resource definition . 131
5.1.3.3.3 Resource Standard Methods . 131
5.1.3.3.4 Resource Custom Operations . 134
5.1.3.4 Resource: NWDAF Event Subscription Transfers . 134
5.1.3.4.1 Description . 134
5.1.3.4.2 Resource definition . 134
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5.1.3.4.3 Resource Standard Methods . 134
5.1.3.4.4 Resource Custom Operations . 135
5.1.3.5 Resource: Individual NWDAF Event Subscription Transfer . 135
5.1.3.5.1 Description . 135
5.1.3.5.2 Resource definition . 135
5.1.3.5.3 Resource Standard Methods . 135
5.1.3.5.4 Resource Custom Operations . 137
5.1.4 Custom Operations without associated resources . 138
5.1.5 Notifications . 138
5.1.5.1 General . 138
5.1.5.2 Event Notification . 138
5.1.5.2.1 Description .
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