5G; 5G System; Network Data Analytics Services; Stage 3 (3GPP TS 29.520 version 15.4.0 Release 15)

RTS/TSGC-0329520vf40

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Status
Published
Publication Date
21-Oct-2019
Current Stage
12 - Completion
Completion Date
22-Oct-2019
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ETSI TS 129 520 V15.4.0 (2019-10) - 5G; 5G System; Network Data Analytics Services; Stage 3 (3GPP TS 29.520 version 15.4.0 Release 15)
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ETSI TS 129 520 V15.4.0 (2019-10)
TECHNICAL SPECIFICATION
5G;
5G System;
Network Data Analytics Services;
Stage 3
(3GPP TS 29.520 version 15.4.0 Release 15)
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3GPP TS 29.520 version 15.4.0 Release 15 1 ETSI TS 129 520 V15.4.0 (2019-10)
Reference
RTS/TSGC-0329520vf40
Keywords
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3GPP TS 29.520 version 15.4.0 Release 15 2 ETSI TS 129 520 V15.4.0 (2019-10)
Intellectual Property Rights
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Legal Notice

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ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 3 ETSI TS 129 520 V15.4.0 (2019-10)
Contents

Intellectual Property Rights ................................................................................................................................ 2

Legal Notice ....................................................................................................................................................... 2

Modal verbs terminology .................................................................................................................................... 2

Foreword ............................................................................................................................................................. 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

3 Definitions and abbreviations ................................................................................................................... 8

3.1 Definitions .......................................................................................................................................................... 8

3.2 Abbreviations ..................................................................................................................................................... 8

4 Services offered by the NWDAF ............................................................................................................. 8

4.1 Introduction ........................................................................................................................................................ 8

4.2 Nnwdaf_EventsSubscription Service ................................................................................................................. 9

4.2.1 Service Description ....................................................................................................................................... 9

4.2.1.1 Overview ................................................................................................................................................. 9

4.2.1.2 Service Architecture ................................................................................................................................ 9

4.2.1.3 Network Functions ................................................................................................................................ 10

4.2.1.3.1 Network Data Analytics Function (NWDAF) ................................................................................. 10

4.2.1.3.2 NF Service Consumers .................................................................................................................... 10

4.2.2 Service Operations ...................................................................................................................................... 10

4.2.2.1 Introduction ........................................................................................................................................... 10

4.2.2.2 Nnwdaf_EventsSubscription_Subscribe service operation ................................................................... 11

4.2.2.2.1 General ............................................................................................................................................ 11

4.2.2.2.2 Subscription for event notifications ................................................................................................. 11

4.2.2.2.3 Update subscription for event notifications ..................................................................................... 12

4.2.2.3 Nnwdaf_EventsSubscription_Unsubscribe service operation ............................................................... 12

4.2.2.3.1 General ............................................................................................................................................ 12

4.2.2.3.2 Unsubscribe from event notifications .............................................................................................. 12

4.2.2.4 Nnwdaf_EventsSubscription_Notify service operation ........................................................................ 13

4.2.2.4.1 General ............................................................................................................................................ 13

4.2.2.4.2 Notification about subscribed event ................................................................................................ 13

4.3 Nnwdaf_AnalyticsInfo Service ........................................................................................................................ 14

4.3.1 Service Description ..................................................................................................................................... 14

4.3.1.1 Overview ............................................................................................................................................... 14

4.3.1.2 Service Architecture .............................................................................................................................. 14

4.3.1.3 Network Functions ................................................................................................................................ 15

4.3.1.3.1 Network Data Analytics Function (NWDAF) ................................................................................. 15

4.3.1.3.2 NF Service Consumers .................................................................................................................... 15

4.3.2 Service Operations ...................................................................................................................................... 15

4.3.2.1 Introduction ........................................................................................................................................... 15

4.3.2.2 Nnwdaf_AnalyticsInfo_Request service operation ............................................................................... 15

4.3.2.2.1 General ............................................................................................................................................ 15

4.3.2.2.2 Request and get from NWDAF Analytics information ................................................................... 16

5 API Definitions ...................................................................................................................................... 16

5.1 Nnwdaf_EventsSubscription Service API ........................................................................................................ 16

5.1.1 Introduction................................................................................................................................................. 16

5.1.2 Usage of HTTP ........................................................................................................................................... 17

5.1.2.1 General .................................................................................................................................................. 17

5.1.2.2 HTTP standard headers ......................................................................................................................... 17

5.1.2.2.1 General ............................................................................................................................................ 17

5.1.2.2.2 Content type .................................................................................................................................... 17

5.1.2.3 HTTP custom headers ........................................................................................................................... 17

5.1.3 Resources .................................................................................................................................................... 18

5.1.3.1 Resource Structure ................................................................................................................................ 18

ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 4 ETSI TS 129 520 V15.4.0 (2019-10)

5.1.3.2 Resource: NWDAF Events Subscriptions ............................................................................................. 18

5.1.3.2.1 Description ...................................................................................................................................... 18

5.1.3.2.2 Resource definition .......................................................................................................................... 18

5.1.3.2.3 Resource Standard Methods ............................................................................................................ 19

5.1.3.2.3.1 POST.......................................................................................................................................... 19

5.1.3.2.4 Resource Custom Operations .......................................................................................................... 19

5.1.3.3 Resource: Individual NWDAF Event Subscription .............................................................................. 19

5.1.4 Custom Operations without associated resources ....................................................................................... 21

5.1.5 Notifications ............................................................................................................................................... 21

5.1.5.1 General .................................................................................................................................................. 21

5.1.5.2 Event Notification ................................................................................................................................. 21

5.1.6 Data Model ................................................................................................................................................. 22

5.1.6.1 General .................................................................................................................................................. 22

5.1.6.2 Structured data types ............................................................................................................................. 22

5.1.6.2.1 Introduction ..................................................................................................................................... 22

5.1.6.2.2 Type NnwdafEventsSubscription .................................................................................................... 23

5.1.6.2.3 Type EventSubscription .................................................................................................................. 23

5.1.6.2.4 Type NnwdafEventsSubscriptionNotification ................................................................................. 23

5.1.6.2.5 Type EventNotification ................................................................................................................... 24

5.1.6.2.6 Type SliceLoadLevelInformation .................................................................................................... 24

5.1.6.3 Simple data types and enumerations ..................................................................................................... 24

5.1.6.3.1 Introduction ..................................................................................................................................... 24

5.1.6.3.2 Simple data types ............................................................................................................................. 24

5.1.6.3.3 Enumeration: NotificationMethod ................................................................................................... 24

5.1.6.3.4 Enumeration: NwdafEvent .............................................................................................................. 25

5.1.7 Error handling ............................................................................................................................................. 25

5.1.8 Feature negotiation ..................................................................................................................................... 25

5.1.9 Security ....................................................................................................................................................... 25

5.2 Nnwdaf_AnalyticsInfo Service API ................................................................................................................. 26

5.2.1 Introduction................................................................................................................................................. 26

5.2.2 Usage of HTTP ........................................................................................................................................... 26

5.2.2.1 General .................................................................................................................................................. 26

5.2.2.2 HTTP standard headers ......................................................................................................................... 26

5.2.2.2.1 General ............................................................................................................................................ 26

5.2.2.2.2 Content type .................................................................................................................................... 26

5.2.2.3 HTTP custom headers ........................................................................................................................... 27

5.2.3 Resources .................................................................................................................................................... 27

5.2.3.1 Resource Structure ................................................................................................................................ 27

5.2.3.2 Resource: NWDAF Analytics ............................................................................................................... 27

5.2.3.2.1 Description ...................................................................................................................................... 27

5.2.3.2.2 Resource definition .......................................................................................................................... 27

5.2.3.2.3 Resource Standard Methods ............................................................................................................ 27

5.2.3.2.3.1 GET............................................................................................................................................ 27

5.2.3.2.4 Resource Custom Operations .......................................................................................................... 28

5.2.4 Custom Operations without associated resources ....................................................................................... 28

5.2.5 Notifications ............................................................................................................................................... 28

5.2.6 Data Model ................................................................................................................................................. 28

5.2.6.1 General .................................................................................................................................................. 28

5.2.6.2 Structured data types ............................................................................................................................. 29

5.2.6.2.1 Introduction ..................................................................................................................................... 29

5.2.6.2.2 Type AnalyticsData ......................................................................................................................... 29

5.2.6.2.3 Type EventFilter .............................................................................................................................. 29

5.2.6.3 Simple data types and enumerations ..................................................................................................... 29

5.2.6.3.1 Introduction ..................................................................................................................................... 29

5.2.6.3.2 Simple data types ............................................................................................................................. 29

5.2.6.3.3 Enumeration: EventId ...................................................................................................................... 30

5.2.7 Error handling ............................................................................................................................................. 30

5.2.8 Feature negotiation ..................................................................................................................................... 30

5.2.9 Security ....................................................................................................................................................... 31

Annex A (normative): OpenAPI specification ................................................................................... 32

ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 5 ETSI TS 129 520 V15.4.0 (2019-10)

A.1 General ................................................................................................................................................... 32

A.2 Nnwdaf_EventsSubscription API ........................................................................................................... 32

A.3 Nnwdaf_AnalyticsInfo API .................................................................................................................... 36

Annex B (informative): Change history ............................................................................................... 39

History .............................................................................................................................................................. 40

ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 6 ETSI TS 129 520 V15.4.0 (2019-10)
Foreword

This Technical Specification has been produced by the 3 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
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3GPP TS 29.520 version 15.4.0 Release 15 7 ETSI TS 129 520 V15.4.0 (2019-10)
1 Scope

The present specification provides the stage 3 definition of the Network Data Analytics Function Services of the 5G

System.

The 5G System Architecture is defined in 3GPP TS 23.501 [2]. The stage 2 definition and related procedures for

Network Data Analytics Function Services are specified in 3GPP TS 23.502 [3] and 3GPP TS 23.503 [4].

The 5G System stage 3 call flows are provided in 3GPP TS 29.513 [5].

The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition

are specified in 3GPP TS 29.500 [6] and 3GPP TS 29.501 [7].

The Network Data Analytics Function Services are provided by the Network Data Analytics Function (NWDAF).

These services provide NWDAF slice congestion events notification and NWDAF specific analytics.

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 23.503: "Policy and Charging Control Framework for the 5G System; Stage 2".

[5] 3GPP TS 29.513: "5G System; Policy and Charging Control signalling flows and QoS parameter

mapping; Stage 3".

[6] 3GPP TS 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".

[7] 3GPP TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".

[8] 3GPP TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".

[9] IETF RFC 7540: "Hypertext Transfer Protocol Version 2 (HTTP/2)".

[10] IETF RFC 8259: "The JavaScript Object Notation (JSON) Data Interchange Format".

[11] OpenAPI, "OpenAPI 3.0.0 Specification", https://github.com/OAI/OpenAPI-
Specification/blob/master/versions/3.0.0.md.
[12] 3GPP TS 29.510: "5G System; Network Function Repository Services; Stage 3".
[13] 3GPP TS 33.501: "Security architecture and procedures for 5G system".
[14] IETF RFC 6749: "The OAuth 2.0 Authorization Framework".
[15] IETF RFC 7807: "Problem Details for HTTP APIs".
[16] 3GPP TR 21.900: "Technical Specification Group working methods".
ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 8 ETSI TS 129 520 V15.4.0 (2019-10)
3 Definitions and abbreviations
3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following

apply. A term defined in the present document takes precedence over the definition of the same term, if any, in

3GPP TR 21.905 [1].
3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An

abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in

3GPP TR 21.905 [1].
API Application Programming Interface
JSON JavaScript Object Notation
HTTP Hypertext Transfer Protocol
NF Network Function
NRF Network Repository Function
NWDAF Network Data Analytics Function
NSSF Network Slice Selection Function
PCF Policy Control Function
4 Services offered by the NWDAF
4.1 Introduction

The Nnwdaf services are used for the NWDAF to provide network data analytics (i.e. load level information). These

services provide NWDAF slice congestion events notification and NWDAF specific analytics.

The following services are specified for NWDAF:
Table 4.1-1: Services provided by NWDAF
Service Name Description Service Operations Operation Example
Semantics Consumer(s)
Nnwdaf_EventsSubscription This service enables Subscribe Subscribe / PCF, NSSF
the NF service Notify
Unsubscribe
consumers to
Notify
subscribe/unsubscribe
for network slice
specific congestion
events notification
from the NWDAF.
Nnwdaf_AnalyticsInfo This service enables Request Request / PCF, NSSF
the NF service Response
consumers to request
and get specific
analytics from
NWDAF.
ETSI
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3GPP TS 29.520 version 15.4.0 Release 15 9 ETSI TS 129 520 V15.4.0 (2019-10)
4.2 Nnwdaf_EventsSubscription Service
4.2.1 Service Description
4.2.1.1 Overview

The Nnwdaf_EventsSubscription Service as defined in 3GPP TS 23.501 [2], 3GPP TS 23.502 [3] and

3GPP TS 23.503 [4], is provided by the Network Data Analytics Function (NWDAF).
This service:

- allows NF consumers to subscribe to and unsubscribe from load events of network slice instance; and

- notifies NF consumers with a corresponding subscription about observed events.
The types of observed events include:
- Load level of network slice insta
...

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