ETSI TS 129 591 V18.11.0 (2026-03)

5G; 5G System; Network Exposure Function Southbound Services; Stage 3 (3GPP TS 29.591 version 18.11.0 Release 18)

RTS/TSGC-0329591vib0

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 Exposure Function Southbound Services;
Stage 3
(3GPP TS 29.591 version 18.11.0 Release 18)


3GPP TS 29.591 version 18.11.0 Release 18 1 ETSI TS 129 591 V18.11.0 (2026-03)

Reference
RTS/TSGC-0329591vib0
Keywords
5G
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ETSI
3GPP TS 29.591 version 18.11.0 Release 18 2 ETSI TS 129 591 V18.11.0 (2026-03)
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ETSI
3GPP TS 29.591 version 18.11.0 Release 18 3 ETSI TS 129 591 V18.11.0 (2026-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 10
1 Scope . 12
2 References . 12
3 Definitions, symbols and abbreviations . 13
3.1 Definitions . 13
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Services offered by the NEF . 14
4.1 Introduction . 14
4.2 Nnef_EventExposure Service . 14
4.2.1 Service Description . 14
4.2.1.1 Overview . 14
4.2.1.2 Service Architecture . 15
4.2.1.3 Network Functions . 16
4.2.1.3.1 Network Exposure Function (NEF) . 16
4.2.1.3.2 NF Service Consumers . 16
4.2.2 Service Operations . 17
4.2.2.1 Introduction . 17
4.2.2.2 Nnef_EventExposure_Subscribe service operation . 17
4.2.2.2.1 General . 17
4.2.2.2.2 Creating a new subscription . 18
4.2.2.2.3 Modifying an existing subscription . 20
4.2.2.3 Nnef_EventExposure_Unsubscribe service operation . 21
4.2.2.3.1 General . 21
4.2.2.3.2 Unsubscription from event notifications . 21
4.2.2.4 Nnef_EventExposure_Notify service operation . 22
4.2.2.4.1 General . 22
4.2.2.4.2 Notification about subscribed events . 22
4.3 Nnef_EASDeployment Service . 24
4.3.1 Service Description . 24
4.3.1.1 Overview . 24
4.3.1.2 Service Architecture . 24
4.3.1.3 Network Functions . 25
4.3.1.3.1 Network Exposure Function (NEF) . 25
4.3.1.3.2 NF Service Consumers . 25
4.3.2 Service Operations . 25
4.3.2.1 Introduction . 25
4.3.2.2 Nnef_EASDeployment_Subscribe service operation . 26
4.3.2.2.1 General . 26
4.3.2.2.2 Creating a new subscription . 26
4.3.2.3 Nnef_EASDeployment_Unsubscribe service operation . 26
4.3.2.3.1 General . 26
4.3.2.3.2 Unsubscription of notification of changes of EAS Deployment Information . 27
4.3.2.4 Nnef_EASDeployment_Notify service operation . 27
4.3.2.4.1 General . 27
4.3.2.4.2 Notification of changes of EAS Deployment Information . 27
4.4 Nnef_TrafficInfluenceData Service . 27
4.4.1 Service Description . 27
4.4.1.1 Overview . 27
4.4.1.2 Service Architecture . 27
4.4.1.3 Network Functions . 28
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4.4.1.3.1 Network Exposure Function (NEF) . 28
4.4.1.3.2 NF Service Consumers . 28
4.4.2 Service Operations . 28
4.4.2.1 Introduction . 28
4.4.2.2 Nnef_TrafficInfluenceData_Subscribe service operation . 29
4.4.2.2.1 General . 29
4.4.2.2.2 Creating a new subscription . 29
4.4.2.2.3 Modifying an existing subscription . 30
4.4.2.3 Nnef_TrafficInfluenceData_Unsubscribe service operation . 31
4.4.2.3.1 General . 31
4.4.2.3.2 Unsubscription of notification of Traffic Influence Data . 31
4.4.2.4 Nnef_TrafficInfluenceData_Notify service operation. 31
4.4.2.4.1 General . 31
4.4.2.4.2 Notification of changes of Traffic Influence Data . 31
4.5 Nnef_ECSAddress Service . 32
4.5.1 Service Description . 32
4.5.1.1 Overview . 32
4.5.1.2 Service Architecture . 32
4.5.1.3 Network Functions . 33
4.5.1.3.1 Network Exposure Function (NEF) . 33
4.5.1.3.2 NF Service Consumers . 33
4.5.2 Service Operations . 33
4.5.2.1 Introduction . 33
4.5.2.2 Nnef_ECSAddress_Subscribe service operation . 34
4.5.2.2.1 General . 34
4.5.2.2.2 Creating a new subscription . 34
4.5.2.2.3 Modifying an existing subscription . 35
4.5.2.3 Nnef_ECSAddress_Unsubscribe service operation . 36
4.5.2.3.1 General . 36
4.5.2.3.2 Unsubscription of notification of ECS Address Configuration Information . 36
4.5.2.4 Nnef_ECSAddress_Notify service operation . 36
4.5.2.4.1 General . 36
4.5.2.4.2 Notification of changes of ECS Address Configuration Information . 36
4.6 Nnef_DNAIMapping Service . 37
4.6.1 Service Description . 37
4.6.1.1 Overview . 37
4.6.1.2 Service Architecture . 37
4.6.1.3 Network Functions . 38
4.6.1.3.1 Network Exposure Function (NEF) . 38
4.6.1.3.2 NF Service Consumers . 38
4.6.2 Service Operations . 38
4.6.2.1 Introduction . 38
4.6.2.2 Nnef_DNAIMapping_Subscribe service operation . 39
4.6.2.2.1 General . 39
4.6.2.2.2 Creating a new subscription for notification of DNAI Mapping Information . 39
4.6.2.3 Nnef_DNAIMapping_Unsubscribe service operation . 40
4.6.2.3.1 General . 40
4.6.2.3.2 Unsubscription of notification of DNAI Mapping Information. 40
4.6.2.4 Nnef_DNAIMapping_Notify service operation . 40
4.6.2.4.1 General . 40
4.6.2.4.2 Notification of changes of DNAI Mapping Information . 40
4.7 Nnef_UEId Service . 41
4.7.1 Service Description . 41
4.7.1.1 Overview . 41
4.7.1.2 Service Architecture . 41
4.7.1.3 Network Functions . 42
4.7.1.3.1 Network Exposure Function (NEF) . 42
4.7.1.3.2 NF Service Consumers . 42
4.7.2 Service Operations . 43
4.7.2.1 Introduction . 43
4.7.2.2 Nnef_UEId_Get service operation . 43
4.7.2.2.1 General . 43
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4.7.2.2.2 Fetch internal UE information for roaming UE . 43
4.7.2.2.3 UE ID Mapping Information Retrieval . 44
5 API Definitions . 45
5.1 Nnef_EventExposure Service API . 45
5.1.1 Introduction. 45
5.1.2 Usage of HTTP . 45
5.1.2.1 General . 45
5.1.2.2 HTTP standard headers . 45
5.1.2.2.1 General . 45
5.1.2.2.2 Content type . 45
5.1.2.3 HTTP custom headers . 45
5.1.3 Resources . 46
5.1.3.1 Overview . 46
5.1.3.2 Resource: Network Exposure Event Subscriptions . 46
5.1.3.2.1 Description . 46
5.1.3.2.2 Resource Definition . 46
5.1.3.2.3 Resource Standard Methods . 47
5.1.3.3 Resource: Individual Network Exposure Event Subscription . 47
5.1.3.3.1 Description . 47
5.1.3.3.2 Resource Definition . 47
5.1.3.3.3 Resource Standard Methods . 48
5.1.4 Custom Operations without associated resources . 51
5.1.5 Notifications . 51
5.1.5.1 General . 51
5.1.5.2 Network Exposure Event Notification . 52
5.1.5.2.1 Description . 52
5.1.5.2.2 Target URI . 52
5.1.5.2.3 Standard Methods . 52
5.1.6 Data Model . 53
5.1.6.1 General . 53
5.1.6.2 Structured data types . 58
5.1.6.2.1 Introduction . 58
5.1.6.2.2 Type: NefEventExposureSubsc . 58
5.1.6.2.3 Type: NefEventExposureNotif . 59
5.1.6.2.4 Type: NefEventNotification . 60
5.1.6.2.5 Type NefEventSubs . 64
5.1.6.2.6 Type UeCommunicationInfo . 64
5.1.6.2.7 Type NefEventFilter . 65
5.1.6.2.8 Type TargetUeIdentification . 66
5.1.6.2.9 Type: ServiceExperienceInfo . 66
5.1.6.2.10 Type: UeMobilityInfo . 67
5.1.6.2.11 Type: UeTrajectoryInfo . 67
5.1.6.2.12 Type PerformanceDataInfo . 67
5.1.6.2.13 Type GNSSAssistDataInfo . 68
5.1.6.2.14 Void . 68
5.1.6.2.15 Type GNSSServArea . 68
5.1.6.3 Simple data types and enumerations . 68
5.1.6.3.1 Introduction . 68
5.1.6.3.2 Simple data types . 68
5.1.6.3.3 Enumeration: NefEvent . 68
5.1.7 Error Handling . 69
5.1.7.1 General . 69
5.1.7.2 Protocol Errors . 69
5.1.7.3 Application Errors . 69
5.1.8 Feature negotiation . 70
5.1.9 Security . 71
5.2 Nnef_EASDeployment Service API . 71
5.2.1 Introduction. 71
5.2.2 Usage of HTTP . 72
5.2.2.1 General . 72
5.2.2.2 HTTP standard headers . 72
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5.2.2.2.1 General . 72
5.2.2.2.2 Content type . 72
5.2.2.3 HTTP custom headers . 72
5.2.3 Resources . 72
5.2.3.1 Overview . 72
5.2.3.2 Resource: EAS Deployment Event Subscriptions . 73
5.2.3.2.1 Description . 73
5.2.3.2.2 Resource Definition . 73
5.2.3.2.3 Resource Standard Methods . 73
5.2.3.3 Resource: Individual EAS Deployment Event Subscription . 74
5.2.3.3.1 Description . 74
5.2.3.3.2 Resource Definition . 74
5.2.3.3.3 Resource Standard Methods . 74
5.2.4 Custom Operations without associated resources . 77
5.2.5 Notifications . 77
5.2.5.1 General . 77
5.2.5.2 EAS Deployment Event Notification . 77
5.2.5.2.1 Description . 77
5.2.5.2.2 Target URI . 77
5.2.5.2.3 Standard Methods . 77
5.2.6 Data Model . 78
5.2.6.1 General . 78
5.2.6.2 Structured data types . 79
5.2.6.2.1 Introduction . 79
5.2.6.2.2 Type: EasDeploySubData. 80
5.2.6.2.3 Type: EasDeployInfoNotif . 80
5.2.6.2.4 Type: EasDepNotification . 80
5.2.6.2.5 Type: EasDeployInfoData . 81
5.2.6.3 Simple data types and enumerations . 81
5.2.6.3.1 Introduction . 81
5.2.6.3.2 Simple data types . 81
5.2.6.3.3 Enumeration: EasEvent . 81
5.2.7 Error Handling . 82
5.2.7.1 General . 82
5.2.7.2 Protocol Errors . 82
5.2.7.3 Application Errors . 82
5.2.8 Feature negotiation . 82
5.2.9 Security . 82
5.3 Nnef_TrafficInfluenceData Service API . 82
5.3.1 Introduction. 82
5.3.2 Usage of HTTP . 83
5.3.2.1 General . 83
5.3.2.2 HTTP standard headers . 83
5.3.2.2.1 General . 83
5.3.2.2.2 Content type . 83
5.3.2.3 HTTP custom headers . 83
5.3.3 Resources . 83
5.3.3.1 Overview . 83
5.3.3.2 Resource: Traffic Influence Data Subscriptions. 84
5.3.3.2.1 Description . 84
5.3.3.2.2 Resource Definition . 84
5.3.3.2.3 Resource Standard Methods . 85
5.3.3.3 Resource: Individual Traffic Influence Data Subscription . 85
5.3.3.3.1 Description . 85
5.3.3.3.2 Resource Definition . 85
5.3.3.3.3 Resource Standard Methods . 86
5.3.4 Custom Operations without associated resources . 89
5.3.5 Notifications . 89
5.3.5.1 General . 89
5.3.5.2 Traffic Influence Data Notification . 89
5.3.5.3.1 Description . 89
5.3.5.3.2 Target URI . 89
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5.3.5.3.3 Standard Methods . 89
5.3.6 Data Model . 90
5.3.6.1 General . 90
5.3.6.2 Structured data types . 91
5.3.6.2.1 Introduction . 91
5.3.6.2.2 Type
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