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TECHNICAL SPECIFICATION
5G;
5G System;
Network Data Analytics Services;
Stage 3
(3GPP TS 29.520 version 15.1.0 Release 15)
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3GPP TS 29.520 version 15.1.0 Release 15 1 ETSI TS 129 520 V15.1.0 (2018-10)
Reference
RTS/TSGC-0329520vf10
Keywords
5G
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3GPP TS 29.520 version 15.1.0 Release 15 2 ETSI TS 129 520 V15.1.0 (2018-10)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Foreword
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, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 29.520 version 15.1.0 Release 15 3 ETSI TS 129 520 V15.1.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 Services offered by the NWDAF . 8
4.1 Introduction . 8
4.2 Nnwdaf_EventsSubscription Service . 8
4.2.1 Service Description . 8
4.2.1.1 Overview . 8
4.2.1.2 Service Architecture . 9
4.2.1.3 Network Functions . 9
4.2.1.3.1 Network Data Analytics Function (NWDAF) . 9
4.2.1.3.2 NF Service Consumers . 9
4.2.2 Service Operations . 10
4.2.2.1 Introduction . 10
4.2.2.2 Nnwdaf_EventsSubscription_Subscribe service operation . 10
4.2.2.2.1 General . 10
4.2.2.2.2 Subscription for event notifications on a specified network slice instance . 10
4.2.2.2.3 Update subscription for event notifications on a specified network slice instance . 11
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 on a specified network slice instance . 13
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 on specified network slice instance . 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 . 16
4.3.2.2.1 General . 16
4.3.2.2.2 Request and get from NWDAF load level information for a particular Network Slice instance . 16
5 API Definitions . 17
5.1 Nnwdaf_EventsSubscription Service API . 17
5.1.1 Introduction. 17
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
5.1.3.2 Resource: NWDAF Events Subscriptions . 18
ETSI
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3GPP TS 29.520 version 15.1.0 Release 15 4 ETSI TS 129 520 V15.1.0 (2018-10)
5.1.3.2.1 Description . 18
5.1.3.2.2 Resource definition . 18
5.1.3.2.3 Resource Standard Methods . 18
5.1.3.2.3.1 POST. 18
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 . 20
5.1.5 Notifications . 21
5.1.5.1 General . 21
5.1.5.2 Event Notification . 21
5.1.6 Data Model . 21
5.1.6.1 General . 21
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
5.2 Nnwdaf_AnalyticsInfo Service API . 25
5.2.1 Introduction. 25
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 . 26
5.2.3 Resources . 26
5.2.3.1 Resource Structure . 26
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 . 27
5.2.4 Custom Operations without associated resources . 27
5.2.5 Notifications . 27
5.2.6 Data Model . 28
5.2.6.1 General . 28
5.2.6.2 Structured data types . 28
5.2.6.2.1 Introduction . 28
5.2.6.2.2 Type AnalyticsData . 28
5.2.6.2.3 Type EventFilter . 28
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 . 29
5.2.7 Error handling . 29
5.2.8 Feature negotiation . 29
Annex A (normative): OpenAPI specification . 31
A.1 General . 31
A.2 Nnwdaf_EventsSubscription API . 31
ETSI
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3GPP TS 29.520 version 15.1.0 Release 15 5 ETSI TS 129 520 V15.1.0 (2018-10)
A.3 Nnwdaf_AnalyticsInfo API . 34
Annex B (informative): Change history . 37
History . 38
ETSI
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3GPP TS 29.520 version 15.1.0 Release 15 6 ETSI TS 129 520 V15.1.0 (2018-10)
Foreword
rd
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 15.1.0 Release 15 7 ETSI TS 129 520 V15.1.0 (2018-10)
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 operator 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 7159: "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
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].
ETSI
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3GPP TS 29.520 version 15.1.0 Release 15 8 ETSI TS 129 520 V15.1.0 (2018-10)
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
NWDAF Network Data Analytics 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 operator 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
the NF service Unsubscribe Notify
consumers to
Notify
subscribe/unsubscribe
for network slice
specific congestion
events notification
from the NWDAF.
Nnwdaf_AnalyticsInfo This service enables Request Request / PCF
the NF service Response
consumers to request
and get operator
specific analytics from
NWDAF.
4.2 Nnwdaf_EventsSubscription Service
4.2.1 Service Description
4.2.1.1 Overview
The NWDAF slice congestion events notification 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 instance.
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3GPP TS 29.520 version 15.1.0 Release 15 9 ETSI TS 129 520 V15.1.0 (2018-10)
4.2.1.2 Service Architecture
The 5G System Architecture is defined in 3GPP TS 23.501 [2]. The Policy and Charging related 5G architecture is also
described in 3GPP TS 23.503 [4] and 3GPP TS 29.513 [5].
The Nnwdaf_EventsSubscription service is part of the Nnwdaf service-based interface exhibited by the Network Data
Analytics Function (NWDAF).
Known consumer of the Nnwdaf_EventsSubscription service is:
- Policy Control Function (PCF)
The PCF accesses the Nnwdaf_EventsSubscription service at the NWDAF via the N23 Reference point.
NWDAF
Nnwdaf
Nnwdaf_EventsSubscription
PCF
Figure 4.2.1.2-1: Reference Architecture for the Nnwdaf_EventsSubscription Service; SBI
representation
NWDAF
N23
PCF
Figure 4.2.1.2-2: Reference Architecture for the Nnwdaf_EventsSubscription Service: reference point
representation
4
...