ETSI TS 129 122 V19.6.0 (2026-03)

Universal Mobile Telecommunications System (UMTS); LTE; 5G; T8 reference point for Northbound APIs (3GPP TS 29.122 version 19.6.0 Release 19)

RTS/TSGC-0329122vj60

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
Universal Mobile Telecommunications System (UMTS);
LTE;
5G;
T8 reference point for Northbound APIs
(3GPP TS 29.122 version 19.6.0 Release 19)


3GPP TS 29.122 version 19.6.0 Release 19 1 ETSI TS 129 122 V19.6.0 (2026-03)

Reference
RTS/TSGC-0329122vj60
Keywords
5G,LTE,UMTS
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ETSI
3GPP TS 29.122 version 19.6.0 Release 19 2 ETSI TS 129 122 V19.6.0 (2026-03)
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ETSI
3GPP TS 29.122 version 19.6.0 Release 19 3 ETSI TS 129 122 V19.6.0 (2026-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 16
1 Scope . 17
2 References . 17
3 Definitions and abbreviations . 19
3.1 Definitions . 19
3.2 Abbreviations . 20
4 T8 reference point . 21
4.1 Overview . 21
4.2 Reference model . 21
4.3 Functional ele me nts . 22
4.3.1 SCEF . 22
4.3.2 SCS/AS . 22
4.4 Procedures over T8 reference point . 22
4.4.1 Introduction. 22
4.4.2 Monitoring Procedures . 23
4.4.2.1 General . 23
4.4.2.2 Monitoring Events Configuration . 23
4.4.2.2.1 General . 23
4.4.2.2.2 Monitoring Events Configuration via HSS . 25
4.4.2.2.3 Monitoring Events Configuration directly via MME/SGSN . 27
4.4.2.2.4 Monitoring Events Configuration via PCRF . 27
4.4.2.3 Reporting of Monitoring Event Procedure . 28
4.4.2.4 Network-initiated Explicit Monitoring Event Deletion Procedure . 29
4.4.2.5 Network initiated notification of applied parameter configuration . 29
4.4.3 Procedures for resource management of Background Data Transfer . 29
4.4.4 Procedures for changing the chargeable party at session set up or during the session . 30
4.4.5 Procedures for Non-IP Data Delivery . 31
4.4.5.1 General . 31
4.4.5.2 NIDD Configuration . 31
4.4.5.2.1 NIDD Configuration for a single UE. 31
4.4.5.2.2 NIDD Configuration for a group of UEs . 32
4.4.5.3 Mobile Terminated NIDD procedure . 33
4.4.5.3.1 Mobile Terminated NIDD for a single UE . 33
4.4.5.3.2 Mobile Terminated NIDD for a group of UEs . 35
4.4.5.4 Mobile Originated NIDD procedure . 35
4.4.5.5 NIDD Authorisation Update procedure . 36
4.4.5.6 Port Management Configuration . 36
4.4.5.6.1 Port Reservation and Release . 36
4.4.5.6.2 Port Notification . 37
4.4.6 Procedures for Device Triggering . 37
4.4.7 Procedures for Group Message Delivery . 38
4.4.7.1 General . 38
4.4.7.2 Group Message Delivery via MBMS . 39
4.4.7.2.1 General . 39
4.4.7.2.2 Group Message Delivery via MBMS by MB2 . 39
4.4.7.2.3 Group message Delivery via MBMS by xMB. 41
4.4.8 Procedures for Reporting of Network Status . 43
4.4.8.1 General . 43
4.4.8.2 Network Status Reporting Subscription . 43
4.4.8.3 Network Status Reporting Notification . 44
4.4.9 Procedures for Communication Pattern Parameters Provisioning . 44
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4.4.10 Procedures for PFD Management . 45
4.4.11 Procedures for Enhanced Coverage Restriction Control . 46
4.4.12 Procedures for Network Parameter Configuration . 47
4.4.12.1 General . 47
4.4.12.2 Configuration Request for an individual UE . 48
4.4.12.3 Configuration Request for a group of UEs . 48
4.4.12.4 Notification of applied parameter configuration . 49
4.4.13 Procedures for setting up an AS session with required QoS . 49
4.4.14 Procedures for MSISDN-less Mobile Originated SMS . 50
4.4.14.1 General . 50
4.4.14.2 Delivery of MSISDN-less MO SMS . 50
4.4.15 Procedures for RACS Parameter Provisioning . 51
5 T8 APIs . 51
5.1 Introduction . 51
5.2 Information applicable to several APIs . 52
5.2.1 Data Types . 52
5.2.1.1 Introduction . 52
5.2.1.2 Referenced structured data types . 55
5.2.1.2.1 Type: SponsorInformation . 55
5.2.1.2.2 Type: UsageThreshold . 55
5.2.1.2.3 Type: TimeWindow . 56
5.2.1.2.4 Type: Acknowledgement . 56
5.2.1.2.5 Type: NotificationData . 56
5.2.1.2.6 Type: EventReport . 56
5.2.1.2.7 Type: AccumulatedUsage. 56
5.2.1.2.8 Type: FlowInfo . 57
5.2.1.2.9 Type: TestNotification . 57
5.2.1.2.10 Type: WebsockNotifConfig . 57
5.2.1.2.11 Type: LocationArea . 58
5.2.1.2.12 Type: ProblemDetails . 59
5.2.1.2.13 Type: InvalidParam . 59
5.2.1.2.14 Type: PlmnId . 59
5.2.1.2.15 Type: ConfigResult . 59
5.2.1.2.16 Type: UsageThresholdRm . 60
5.2.1.2.17 Type: LocationArea5G . 60
5.2.1.2.18 Type: EthFlowInfo . 60
5.2.1.3 Referenced Simple data types and enumerations . 61
5.2.1.3.1 Introduction . 61
5.2.1.3.2 Simple data types . 61
5.2.1.3.3 Enumeration: Event . 63
5.2.1.3.4 Enumeration: ResultReason . 63
5.2.1.4 Conventions for documenting structured data types . 63
5.2.2 Usage of HTTP . 64
5.2.2.1 General . 64
5.2.2.2 Usage of the HTTP PATCH method . 64
5.2.3 Content type . 64
5.2.4 URI structure . 65
5.2.4.1 Resource URI structure . 65
5.2.4.2 Custom operations URI structure . 65
5.2.4.3 Callback URI structure . 65
5.2.5 Notifications . 66
5.2.5.1 General . 66
5.2.5.2 Notification Delivery using a separate HTTP connection . 66
5.2.5.3 Notification Test Event . 66
5.2.5.4 Notification Delivery using Websocket . 66
5.2.6 Error handling . 68
5.2.7 Feature negotiation . 71
5.2.8 HTTP custom headers . 71
5.2.8.1 General . 71
5.2.8.2 Reused HTTP custom headers . 71
5.2.8.3 Optional HTTP custom headers . 71
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5.2.8.3.1 General . 71
5.2.8.3.2 Nbi-Api-Sender-Timestamp . 72
5.2.8.3.3 Nb-Api-Max-Rsp-Time . 72
5.2.8.3.4 Nbi-Api-Lci . 72
5.2.8.3.5 Nb-Api-Oci . 72
5.2.9 Conventions for Open API specification files . 73
5.2.9.1 General . 73
5.2.9.2 Formatting of OpenAPI files . 73
5.2.9.3 Structured data types . 73
5.2.9.4 Info . 75
5.2.9.5 Servers . 75
5.2.9.6 References to other 3GPP-defined Open API specification files . 75
5.2.9.7 Server-initiated communication . 76
5.2.9.8 Describing the body of HTTP PATCH requests . 76
5.2.9.8.1 General . 76
5.2.9.8.2 JSON Merge Patch . 77
5.2.9.8.3 JSON PATCH . 77
5.2.9.9 Error Responses . 77
5.2.9.10 Enumerations . 78
5.2.9.11 Read only attribute . 79
5.2.9.12 externalDocs. 79
5.2.9.13 Operation identifiers. 79
5.2.9.14 Usage of the "tags" field. 80
5.2.10 Redirection handling . 80
5.2.11 Support of Load and Overload Control . 80
5.2.12 Query parameters . 81
5.2.13 Vendor-specific extensions . 82
5.2.13.1 General . 82
5.2.13.2 Vendor-specific extensions to the data model . 82
5.2.13.3 Vendor-specific query parameters. 82
5.3 MonitoringEvent API . 83
5.3.1 Overview . 83
5.3.2 Data model . 83
5.3.2.1 Resource data types . 83
5.3.2.1.1 Introduction . 83
5.3.2.1.2 Type: MonitoringEventSubscription . 90
5.3.2.1.3 Void . 104
5.3.2.2 Notification data types . 104
5.3.2.2.1 Introduction . 104
5.3.2.2.2 Type: MonitoringNotification . 104
5.3.2.3 Referenced structured data types . 105
5.3.2.3.1 Introduction . 105
5.3.2.3.2 Type: MonitoringEventReport . 105
5.3.2.3.3 Type: IdleStatusInfo . 110
5.3.2.3.4 Type: UePerLocationReport . 111
5.3.2.3.5 Type: LocationInfo . 111
5.3.2.3.6 Type: FailureCause . 114
5.3.2.3.7 Type: PdnConnectionInformation . 115
5.3.2.3.8 Type: AppliedParameterConfiguration . 115
5.3.2.3.9 Type: ApiCapabilityInfo. 116
5.3.2.3.10 Type: MonitoringEventReports . 116
5.3.2.3.11 Type: UavPolicy . 116
5.3.2.3.11A Type: ConsentRevocNotif . 116
5.3.2.3.12 Type: ConsentRevoked . 117
5.3.2.3.13 Type: GroupMembListChanges . 117
5.3.2.3.14 Void . 117
5.3.2.3.15 Void . 117
5.3.2.3.16 Void . 117
5.3.2.3.17 Type: UpLocRepAddrAfRm . 117
5.3.2.3.18 Type: UpCumEvtRep . 118
5.3.2.3.19 Type: UeStrAndFwdSatInfo . 118
5.3.2.3.20 Type: EnergyInfo. 118
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5.3.2.4 Referenced simple data types and enumerations . 118
5.3.2.4.1 Introduction . 118
5.3.2.4.2 Simple data types . 119
5.3.2.4.3 Enumeration: MonitoringType . 119
5.3.2.4.4 Enumeration: ReachabilityType . 121
5.3.2.4.5 Enumeration: LocationType . 121
5.3.2.4.6 Enumeration: AssociationType . 121
5.3.2.4.7 Enumeration: Accuracy . 122
5.3.2.4.8 Enumeration: PdnConnectionStatus . 122
5.3.2.4.9 Enumeration: PdnType . 122
5.3.2.4.10 Enumeration: InterfaceIndication . 122
5.3.2.4.11 Enumeration: LocationFailureCause . 123
5.3.2.4.12 Enumeration: SubType . 123
5.3.2.4.13 Enumeration: SACRepFormat . 123
5.3.2.4.14 Enumeration: UeStrAndFwdStatus . 124
5.3.3 Resource structure. 124
5.3.3.1 General . 124
5.3.3.2 Resource: Monitoring Event Subscriptions . 124
5.3.3.2.1 Introduction . 124
5.3.3.2.2 Resource definition . 124
5.3.3.2.3 Resource methods . 125
5.3.3.3 Resource: Individual Monitoring Event Subscription . 127
5.3.3.3.1 Introduction . 127
5.3.3.3.2 Resource definition . 127
5.3.3.3.3 Resource methods . 128
5.3.3.4 Void. 132
5.3.3A Notifications . 132
5.3.3A.1 General . 132
5.3.3A.2 Monitoring Notification . 132
5.3.3A.2.1 Description . 132
5.3.3A.2.2 Target URI . 132
5.3.3A.2.3 Standard Methods . 132
5.3.3A.3 User Consent Revocation Notification . 133
5.3.3A.3.1 Description . 133
5.3.3A.3.2 Target URI . 133
5.3.3A.3.3 Operation Definition . 134
5.3.4 Used Features . 135
5.3.5 Error handling . 140
5.3.5.1 General . 140
5.3.5.2 Protocol Errors . 140
5.3.5.3 Application Errors . 140
5.4 ResourceManagementOfBdt API . 142
5.4.1 Overview . 142
5.4.2 Data model . 142
5.4.2.1 Resource data types . 142
5.4.2.1.1 Introduction . 142
5.4.2.1.2 Type: Bdt . 142
5.4.2.1.3 Type: BdtPatch . 144
5.4.2.1.4 Type: ExNotification . 144
5.4.2.2 Referenced structured data types . 145
5.4.2.2.1 Introduction . 145
5.4.2.2.2 Type: TransferPolicy . 145
5.4.2.3 Referenced simple data types and enumerations . 145
5.4.2.3.1 Introduction . 145
5.4.2.3.2 Simple data types . 145
5.4.3 Resource structure. 145
5.4.3.1 General . 145
5.4.3.2 Resource: BDT Subscriptions . 146
5.4.3.2.1 Introduction . 146
5.4.3.2.2 Resource definition . 146
5.4.3.2.3 Resource methods . 146
5.4.3.3 Resource: Individual BDT Subscription . 148
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5.4.3.3.1 Introduction . 148
5.4.3.3.2 Resource definition . 148
5.4.3.3.3 Resource methods . 148
5.4.3.4 Void. 152
5.4.3A Notifications . 152
5.4.3A.1 General . 152
5.4.3A.2 BDT Wa
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