ETSI TS 129 502 V15.5.1 (2019-10)

5G; 5G System; Session Management Services; Stage 3 (3GPP TS 29.502 version 15.5.1 Release 15)

RTS/TSGC-0429502vf51

General Information

• Status: Published
• Publication Date: 29-Oct-2019
• Technical Committee: 3GPP CT 4 - MAP/CAMEL/GTP/BCH/SS/TrFO/IMS/GUP/WLAN (formely CN4)
• Current Stage: 12 - Completion
• Completion Date: 30-Oct-2019

Standards Content (Sample)

TECHNICAL SPECIFICATION
5G;
5G System;
Session Management Services;
Stage 3
(3GPP TS 29.502 version 15.5.1 Release 15)


3GPP TS 29.502 version 15.5.1 Release 15 1 ETSI TS 129 502 V15.5.1 (2019-10)

Reference
RTS/TSGC-0429502vf51
Keywords
5G
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ETSI
3GPP TS 29.502 version 15.5.1 Release 15 2 ETSI TS 129 502 V15.5.1 (2019-10)
Intellectual Property Rights
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
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Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
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provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
3GPP TS 29.502 version 15.5.1 Release 15 3 ETSI TS 129 502 V15.5.1 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 9
4 Overview . 9
4.1 Introduction . 9
5 Services offered by the SMF . 10
5.1 Introduction . 10
5.2 Nsmf_PDUSession Service . 10
5.2.1 Service Description . 10
5.2.2 Service Operations . 11
5.2.2.1 Introduction . 11
5.2.2.2 Create SM Context service operation . 11
5.2.2.2.1 General . 11
5.2.2.2.2 EPS to 5GS Idle mode mobility using N26 interface . 13
5.2.2.2.3 EPS to 5GS Handover Preparation using N26 interface . 15
5.2.2.3 Update SM Context service operation. 16
5.2.2.3.1 General . 16
5.2.2.3.2 Activation and Deactivation of the User Plane connection of a PDU session . 17
5.2.2.3.2.1 General . 17
5.2.2.3.2.2 Activation of User Plane connectivity of a PDU session . 18
5.2.2.3.2.3 Deactivation of User Plane connectivity of a PDU session . 19
5.2.2.3.2.4 Changing the access type of a PDU session from non-3GPP access to 3GPP access during
a Service Request procedure . 20
5.2.2.3.3 Xn Handover . 20
5.2.2.3.4 N2 Handover . 22
5.2.2.3.4.1 General . 22
5.2.2.3.4.2 N2 Handover Preparation . 22
5.2.2.3.4.3 N2 Handover Execution . 24
5.2.2.3.4.4 N2 Handover Cancellation . 25
5.2.2.3.5 Handover between 3GPP and untrusted non-3GPP access procedures . 26
5.2.2.3.5.1 General . 26
5.2.2.3.5.2 Handover of a PDU session without AMF change or with target AMF in same PLMN . 26
5.2.2.3.6 Inter-AMF change or mobility . 26
5.2.2.3.7 RAN Initiated QoS Flow Mobility . 27
5.2.2.3.8 EPS to 5GS Handover using N26 interface . 28
5.2.2.3.8.1 General . 28
5.2.2.3.8.2 EPS to 5GS Handover Preparation . 28
5.2.2.3.8.3 EPS to 5GS Handover Execution . 28
5.2.2.3.8.4 EPS to 5GS Handover Cancellation . 29
5.2.2.3.9 5GS to EPS Handover using N26 interface . 29
5.2.2.3.10 P-CSCF Restoration Procedure via AMF . 29
5.2.2.3.11 AMF requested PDU Session Release due to duplicated PDU Session Id . 29
5.2.2.3.12 AMF requested PDU Session Release due to slice not available . 30
5.2.2.4 Release SM Context service operation . 30
5.2.2.4.1 General . 30
5.2.2.5 Notify SM Context Status service operation . 31
5.2.2.5.1 General . 31
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5.2.2.6 Retrieve SM Context service operation. 32
5.2.2.6.1 General . 32
5.2.2.7 Create service operation . 33
5.2.2.7.1 General . 33
5.2.2.7.2 EPS to 5GS Idle mode mobility . 35
5.2.2.7.3 EPS to 5GS Handover Preparation . 36
5.2.2.8 Update service operation . 37
5.2.2.8.1 General . 37
5.2.2.8.2 Update service operation towards H-SMF. 37
5.2.2.8.2.1 General . 37
5.2.2.8.2.2 UE or visited network requested PDU session modification . 38
5.2.2.8.2.3 UE requested PDU session release . 38
5.2.2.8.2.4 EPS to 5GS Handover Execution . 38
5.2.2.8.2.5 Handover between 3GPP and untrusted non-3GPP access (Home Routed PDU session) . 39
5.2.2.8.2.6 P-CSCF Restoration Procedure via AMF (Home Routed PDU session) . 39
5.2.2.8.3 Update service operation towards V-SMF. 39
5.2.2.8.3.1 General . 39
5.2.2.8.3.2 Home network requested PDU session modification . 40
5.2.2.8.3.3 Home network requested PDU session release . 41
5.2.2.8.3.4 Handover between 3GPP and untrusted non-3GPP access, from 5GC-N3IWF to EPS or

from 5GS to EPC/ePDG . 41
5.2.2.8.3.5 EPS Bearer ID assignment . 42
5.2.2.9 Release service operation . 42
5.2.2.9.1 General . 42
5.2.2.10 Notify Status service operation . 43
5.2.2.10.1 General . 43
5.2.3 General procedures . 44
5.2.3.1 Transfer of NAS SM information between UE and H-SMF for Home Routed PDU sessions . 44
5.2.3.1.1 General . 44
5.2.3.1.2 V-SMF Behaviour . 44
5.2.3.1.3 H-SMF Behaviour . 45
6 API Definitions . 45
6.1 Nsmf_PDUSession Service API . 45
6.1.1 API URI . 45
6.1.2 Usage of HTTP . 45
6.1.2.1 General . 45
6.1.2.2 HTTP standard headers . 45
6.1.2.2.1 General . 45
6.1.2.2.2 Content type . 46
6.1.2.3 HTTP custom headers . 46
6.1.2.3.1 General . 46
6.1.2.4 HTTP multipart messages . 46
6.1.2.5 HTTP/2 request retries . 47
6.1.3 Resources . 47
6.1.3.1 Overview . 47
6.1.3.2 Resource: SM contexts collection . 49
6.1.3.2.1 Description . 49
6.1.3.2.2 Resource Definition . 49
6.1.3.2.3 Resource Standard Methods . 49
6.1.3.2.3.1 POST. 49
6.1.3.2.4 Resource Custom Operations . 51
6.1.3.3 Resource: Individual SM context . 52
6.1.3.3.1 Description . 52
6.1.3.3.2 Resource Definition . 52
6.1.3.3.3 Resource Standard Methods . 52
6.1.3.3.4 Resource Custom Operations . 52
6.1.3.3.4.1 Overview . 52
6.1.3.3.4.2 Operation: modify . 52
6.1.3.3.4.2.1 Description . 52
6.1.3.3.4.2.2 Operation Definition . 52
6.1.3.3.4.3 Operation: release . 53
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6.1.3.3.4.3.1 Description . 53
6.1.3.3.4.3.2 Operation Definition . 53
6.1.3.3.4.4 Operation: retrieve . 54
6.1.3.3.4.4.1 Description . 54
6.1.3.3.4.4.2 Operation Definition . 54
6.1.3.5 Resource: PDU sessions collection (H-SMF) . 54
6.1.3.5.1 Description . 54
6.1.3.5.2 Resource Definition . 54
6.1.3.5.3 Resource Standard Methods . 55
6.1.3.5.3.1 POST. 55
6.1.3.5.4 Resource Custom Operations . 57
6.1.3.5.4.1 Overview . 57
6.1.3.6 Resource: Individual PDU session (H-SMF) . 57
6.1.3.6.1 Description . 57
6.1.3.6.2 Resource Definition . 57
6.1.3.6.3 Resource Standard Methods . 57
6.1.3.6.4 Resource Custom Operations . 57
6.1.3.6.4.1 Overview . 57
6.1.3.6.4.2 Operation: modify . 57
6.1.3.6.4.2.1 Description . 57
6.1.3.6.4.2.2 Operation Definition . 57
6.1.3.6.4.3 Operation: release . 58
6.1.3.6.4.3.1 Description . 58
6.1.3.6.4.3.2 Operation Definition . 58
6.1.3.7 Resource: Individual PDU session (V-SMF) . 59
6.1.3.7.1 Description . 59
6.1.3.7.2 Resource Definition . 59
6.1.3.7.3 Resource Standard Methods . 59
6.1.3.7.3.1 POST. 59
6.1.3.7.4 Resource Custom Operations . 60
6.1.3.7.4.1 Overview . 60
6.1.3.7.4.2 Operation: modify . 60
6.1.3.7.4.2.1 Description . 60
6.1.3.7.4.2.2 Operation Definition . 60
6.1.4 Custom Operations without associated resources . 61
6.1.5 Notifications . 61
6.1.5.1 General . 61
6.1.5.2 SM Context Status Notification . 62
6.1.5.2.1 Description . 62
6.1.5.2.2 Notification Definition . 62
6.1.6 Data Model . 62
6.1.6.1 General . 62
6.1.6.2 Structured data types . 64
6.1.6.2.1 Introduction . 64
6.1.6.2.2 Type: SmContextCreateData . 65
6.1.6.2.3 Type: SMContextCreatedData . 69
6.1.6.2.4 Type: SMContextUpdateData . 70
6.1.6.2.5 Type: SMContextUpdatedData . 75
6.1.6.2.6 Type: SMContextReleaseData . 76
6.1.6.2.7 Type: SMContextRetrieveData . 77
6.1.6.2.8 Type: SMContextStatusNotification . 77
6.1.6.2.9 Type: PduSessionCreateData . 78
6.1.6.2.10 Type: PduSessionCreatedData . 82
6.1.6.2.11 Type: HsmfUpdateData . 85
6.1.6.2.12 Type: HsmfUpdatedData . 89
6.1.6.2.13 Type: ReleaseData . 89
6.1.6.2.14 Type: HsmfUpdateError . 90
6.1.6.2.15 Type: VsmfUpdateData . 91
6.1.6.2.16 Type: VsmfUpdatedData . 94
6.1.6.2.17 Type: StatusNotification . 95
6.1.6.2.18 Type: QosFlowItem . 95
6.1.6.2.19 Type: QosFlowSetupItem . 95
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6.1.6.2.20 Type: QosFlowAddModifyRequestItem . 96
6.1.6.2.21 Type: QosFlowReleaseRequestItem . 96
6.1.6.2.22 Type: QosFlowProfile . 97
6.1.6.2.23 Type: GbrQosFlowInformation . 97
6.1.6.2.24 Type: QosFlowNotifyItem . 98
6.1.6.2.25 Type: Void . 98
6.1.6.2.26 Type: Void . 98
6.1.6.2.27 Type: SMContextRetrievedData . 98
6.1.6.2.28 Type: TunnelInfo . 98
6.1.6.2.29 Type: StatusInfo . 98
6.1.6.2.30 Type: VsmfUpdateError . 99
6.1.6.2.31 Type: EpsPdnCnxInfo . 99
6.1.6.2.32 Type: EpsBearerInfo . 100
6.1.6.2.33 Type: PduSessionNotifyItem . 100
6.1.6.2.34 Type: EbiArpMapping . 100
6.1.6.2.35 Type: SmContextCreateError . 100
6.1.6.2.36 Type: SMContextUpdateError . 101
6.1.6.2.37 Type: PduSessionCreateError . 102
6.1.6.2.38 Type: MmeCapabilities . 102
6.1.6.2.39 Type: Void . 102
6.1.6.3 Simple data types and enumerations . 102
6.1.6.3.1 Introduction . 102
6.1.6.3.2 Simple data types . 103
6.1.6.3.3 Enumeration: UpCnxState . 103
6.1.6.3.4 Enumeration: HoState . 104
6.1.6.3.5 Enumeration: RequestType . 104
6.1.6.3.6 Enumeration: RequestIndication . 104
6.1.6.3.7 Enumeration: NotificationCause . 104
6.1.6.3.8 Enumeration: Cause . 105
6.1.6.3.9 Enumeration: ResourceStatus . 105
6.1.6.3.10 Enumeration: DnnSelectionMode . 105
6.1.6.3.11 Enumeration: EpsInterworkingIndication . 106
6.1.6.3.12 Enumeration: N2SmInfoType . 106
6.1.6.3.13 Enumeration: MaxIntegrityProtectedDataRate . 106
6.1.6.4 Binary data . 107
6.1.6.4.1 Introduction . 107
6.1.6.4.2 N1 SM Message . 107
6.1.6.4.3 N2 SM Information . 107
6.1.6.4.4 n1SmInfoFromUe, n1SmInfoToUe, unknownN1SmInfo . 108
6.1.7 Error Handling . 110
6.1.7.1 General . 110
6.1.7.2 Protocol Errors . 110
6.1.7.3 Application Errors . 110
6.1.8 Feature Negotiation. 113
6.1.9 Security . 114
Annex A (normative): OpenAPI specification . 115
A.1 General . 115
A.2 Nsmf_PDUSession API . 115
Annex B (Informative): HTTP Multipart Messages . 146
B.1 Example of HTTP multipart message . 146
B.1.1 General . 146
B.1.2 Example HTTP multipart message with N1 SM Message binary data . 147
Annex C (informative): Change history . 148
History . 151

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3GPP TS 29.502 version 15.5.1 Release 15 7 ETSI TS 129 502 V15.5.1 (2019-10)
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
3GPP TS 29.502 version 15.5.1 Release 15 8 ETSI TS 129 502 V15.5.1 (2019-10)
1 Scope
The present document specifies the stage 3 protocol and data model for the Nsmf Service Based Interface. It provides
stage 3 protocol definitions and message flows, and specifies the API for each service offered by the SMF other than the
Session Management Event Exposure service.
The 5G System stage 2 architecture and procedures are specified in 3GPP TS 23.501 [2] and 3GPP TS 23.502 [3].
The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition
are specified in 3GPP TS 29.500 [4] and 3GPP TS 29.501 [5].
The Session Management Event Exposure Service is specified in 3GPP TS 29.508 [6].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 23.501: "System Architecture for the 5G System; Stage 2".
[3] 3GPP TS 23.502: "Procedures for the 5G System; Stage 2".
[4] 3GPP TS 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".
[5] 3GPP TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".
[6] 3GPP TS 29.508: "5G System; Session Management Event Exposure Service; Stage 3".
[7] 3GPP TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[8] 3GPP TS 24.007: "Mobile radio interface signalling layer 3; General aspects".
[9] 3GPP TS 38.413: "NG Radio Access Network (NG-RAN); NG Application Protocol (NGAP)".
[10] IETF RFC 2387: "The MIME Multipart/Related Content-type".
[11] IETF RFC 8259: "The JavaScript Object Notation (JSON) Data Interchange Format".
[12] IETF RFC 2045: "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet
Message Bodies".
[13] 3GPP TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
[14] IETF RFC 7540: "Hypertext Transfer Protocol Version 2 (HTTP/2)".
[15] OpenAPI Initiative, "OpenAPI 3.0.0 Specification", https://github.com/OAI/OpenAPI-
Specification/blob/master/versions/3.0.0.md.
[16] 3GPP TS 29.274: "3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service
(GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3".
[17] 3GPP TS 33.501: "Security architecture and procedures for 5G system".
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3GPP TS 29.502 version 15.5.1 Release 15 9 ETSI TS 129 502 V15.5.1 (2019-10)
[18] IETF RFC 6749: "The OAuth 2.0 Authorization Framework".
[19] 3GPP TS 29.510: "Network Function Repository Services; Stage 3".
[20] 3GPP TS 29.518: "5G System; Access and Mobility Management Service; Stage 3".
[21] 3GPP TS 23.380: "IMS Restoration Procedures".
[22] 3GPP TS 32.422: "Telecommunication management; Subscriber and equipment trace; Trace
control and configuration management".
[23] IETF RFC 7807: "Problem Details for HTTP APIs".
[24] 3GPP TS 23.527: "5G System; Restoration Procedures".
[25] 3GPP TS 32.255: "Charging management; 5G data connectivity domain charging; stage 2".
[26] 3GPP TS 32.291: "Charging management; 5G system, charging service; Stage 3".
[27] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS);
Stage 3".
[28] 3GPP TR 21.900: "Technical Specification Group working
...