ETSI TS 129 525 V15.2.0 (2019-10)

5G; 5G System; UE Policy Control Service; Stage 3 (3GPP TS 29.525 version 15.2.0 Release 15)

RTS/TSGC-0329525vf20

General Information

• Status: Published
• Publication Date: 23-Oct-2019
• Technical Committee: 3GPP CT 3 - Interworking with external networks (formely CN3)
• Current Stage: 12 - Completion
• Completion Date: 24-Oct-2019

Standards Content (Sample)

ETSI TS 129 525 V15.2.0 (2019-10)






TECHNICAL SPECIFICATION
5G;
5G System;
UE Policy Control Service;
Stage 3
(3GPP TS 29.525 version 15.2.0 Release 15)

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3GPP TS 29.525 version 15.2.0 Release 15 1 ETSI TS 129 525 V15.2.0 (2019-10)



Reference
RTS/TSGC-0329525vf20
Keywords
5G
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3GPP TS 29.525 version 15.2.0 Release 15 2 ETSI TS 129 525 V15.2.0 (2019-10)
Intellectual Property Rights
Essential patents
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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
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3GPP TS 29.525 version 15.2.0 Release 15 3 ETSI TS 129 525 V15.2.0 (2019-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 UE Policy Control Service . 8
4.1 Service Description . 8
4.1.1 Overview . 8
4.1.2 Service Architecture . 8
4.1.3 Network Functions . 9
4.1.3.1 Policy Control Function (PCF) . 9
4.1.3.2 NF Service Consumers . 10
4.2 Service Operations . 11
4.2.1 Introduction. 11
4.2.2 Npcf_UEPolicyControl_Create Service Operation . 11
4.2.2.1 General . 11
4.2.2.2 UE Policy . 13
4.2.2.2.1 General . 13
4.2.2.2.2 UE Access Network discovery and selection policies . 15
4.2.2.2.3 UE Route Selection Policy(URSP) . 16
4.2.3 Npcf_UEPolicyControl_Update Service Operation . 17
4.2.3.1 General . 17
4.2.3.2 Policy Control Request Triggers . 18
4.2.3.3 Encoding of updated policy. 19
4.2.4 Npcf_UEPolicyControl_UpdateNotify Service Operation . 19
4.2.4.1 General . 19
4.2.4.2 Policy update notification . 19
4.2.4.3 Request for termination of the policy association . 20
4.2.5 Npcf_UEPolicyControl_Delete Service Operation . 22
5 Npcf_UEPolicyControl API . 22
5.1 Introduction . 22
5.2 Usage of HTTP . 23
5.2.1 General . 23
5.2.2 HTTP standard headers . 23
5.2.2.1 General . 23
5.2.2.2 Content type . 23
5.2.3 HTTP custom headers . 23
5.3 Resources . 24
5.3.1 Resource Structure . 24
5.3.2 Resource:UE Policy Associati ons . 24
5.3.2.1 Description . 24
5.3.2.2 Resource definition . 24
5.3.2.3 Resource Standard Methods . 25
5.3.2.3.1 POST . 25
5.3.3 Resource: Individual UE Policy Association . 25
5.3.3.1 Description . 25
5.3.3.2 Resource definition . 25
5.3.3.3 Resource Standard Methods . 25
5.3.3.3.1 GET . 25
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3GPP TS 29.525 version 15.2.0 Release 15 4 ETSI TS 129 525 V15.2.0 (2019-10)
5.3.3.3.2 DELETE . 26
5.3.3.4 Resource Custom Operations . 26
5.3.3.4.1 Overview . 26
5.3.3.4.2 Operation: Update . 27
5.3.3.4.2.1 Description . 27
5.3.3.4.2.2 Operation Definition . 27
5.4 Custom Operations without associated resources. 27
5.5 Notifications . 27
5.5.1 General . 27
5.5.2 Policy Update Notification . 27
5.5.2.1 Description . 27
5.5.2.2 Operation Definition . 27
5.5.3 Request for termination of the UE policy association. 28
5.5.3.1 Description . 28
5.5.3.2 Operation Definition . 28
5.6 Data Model . 28
5.6.1 General . 28
5.6.2 Structured data types . 29
5.6.2.1 Introduction . 29
5.6.2.2 Type PolicyAssociation . 30
5.6.2.3 Type PolicyAssociationRequest . 31
5.6.2.4 Type PolicyAssociationUpdateRequest . 32
5.6.2.5 Type PolicyUpdate . 33
5.6.2.6 Type TerminationNotification. 33
5.6.3 Simple data types and enumerations . 33
5.6.3.1 Introduction . 33
5.6.3.2 Simple data types . 33
5.6.3.3 Enumeration: RequestTrigger . 34
5.6.3.4 Enumeration: PolicyAssociationReleaseCause . 34
5.7 Error handling . 34
5.7.1 General . 34
5.7.2 Protocol Errors . 35
5.7.3 Application Errors . 35
5.8 Feature negotiation . 35
5.9 Security . 35
Annex A (normative): OpenAPI specification . 36
A.1 General . 36
A.2 Npcf_UEPolicyControl API . 36
Annex B (informative): Withdrawn API versions . 43
Annex C (informative): Change history . 44
History . 45

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3GPP TS 29.525 version 15.2.0 Release 15 5 ETSI TS 129 525 V15.2.0 (2019-10)
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.
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3GPP TS 29.525 version 15.2.0 Release 15 6 ETSI TS 129 525 V15.2.0 (2019-10)
1 Scope
The present specification provides the stage 3 definition of the UE Policy Control Service (Npcf_UEPolicyControl) of
the 5G System.
The stage 2 definition and procedures of UE Policy Control Service are contained in 3GPP TS 23.502 [3] and
3GPP TS 23.503 [4]. The 5G System Architecture is defined in 3GPP TS 23.501 [2].
Stage 3 call flows are provided in 3GPP TS 29.513 [7].
The Technical Realization of the Service Based Architecture and the Principles and Guidelines for Services Definition
of the 5G System are specified in 3GPP TS 29.500 [5] and 3GPP TS 29.501 [6].
The UE Policy Control Service is provided by the Policy Control Function (PCF). This service provides UE policies.
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 29.500: "5G System; Technical Realization of Service Based Architecture; Stage 3".
[6] 3GPP TS 29.501: "5G System; Principles and Guidelines for Services Definition; Stage 3".
[7] 3GPP TS 29.513: "5G System; Policy and Charging Control signalling flows and QoS parameter
mapping; Stage 3".
[8] IETF RFC 7540: "Hypertext Transfer Protocol Version 2 (HTTP/2)".
[9] IETF RFC 8259: "The JavaScript Object Notation (JSON) Data Interchange Format".
[10] OpenAPI, "OpenAPI 3.0.0 Specification", https://github.com/OAI/OpenAPI-
Specification/blob/master/versions/3.0.0.md.
[11] 3GPP TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
[12] 3GPP TS 23.402: "Architecture enhancements for non-3GPP accesses".
[13] 3GPP TS 29.510: "5G System; Network Function Repository Services; Stage 3".
[14] 3GPP TS 29.518: "5G System; Access and Mobility Management Services; Stage 3".
[15] 3GPP TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[16] 3GPP TS 24.526: "UE policies for 5G System (5GS); Stage 3".
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3GPP TS 29.525 version 15.2.0 Release 15 7 ETSI TS 129 525 V15.2.0 (2019-10)
[17] 3GPP TS 29.519: "5G System; Usage of the Unified Data Repository service for Policy Data,
Application Data and Structured Data for Exposure; Stage 3".
[18] 3GPP TS 32.422: "Telecommunication management; Subscriber and equipment trace; Trace
control and configuration management".
[19] 3GPP TS 33.501: "Security architecture and procedures for 5G system".
[20] IETF RFC 6749: "The OAuth 2.0 Authorization Framework".
[21] IETF RFC 7807: "Problem Details for HTTP APIs".
[22] 3GPP TR 21.900: "Technical Specification Group working methods".
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].
AMF Access and Mobility Management Function
ANDSP Access Network Discovery and Selection Policy
API Application Programming Interface
DNN Data Network Name
GPSI Generic Public Subscription Identifier
GUAMI Globally Unique AMF Identifier
HTTP Hypertext Transfer Protocol
H-PCF Home Policy Control Function
JSON JavaScript Object Notation
N3AN Non-3GPP access network
NF Network Function
NRF Network Repository Function
OS Operating System
OSId Operating System Identity
PCF Policy Control Function
PEI Permanent Equipment Identifier
PRA Presence Reporting Area
PTI Procedure Transaction Identity.
SUPI Subscription Permanent Identifier
UDR Unified Data Repository
UPSC UE policy section code
UPSI UE policy section identifier
URSP UE Route Selection Policy
V-PCF Visited Policy Control Function
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3GPP TS 29.525 version 15.2.0 Release 15 8 ETSI TS 129 525 V15.2.0 (2019-10)
4 UE Policy Control Service
4.1 Service Description
4.1.1 Overview
The UE Policy Control Service, as defined in 3GPP TS 23.502 [3] and 3GPP TS 23.503 [4], is provided by the Policy
Control Function (PCF).
This service is used as part of the provisioning of UE policies determined by the PCF to the UE via the AMF and offers
the following functionalities:
- creation of the UE Policy Association requested by the NF service consumer (e.g. AMF);
- provisioning of the policy control request triggers to the NF service consumer (e.g. AMF);
- provisioning of the UE policy to the V-PCF by the H-PCF in the roaming case;
- reporting of the met policy control request trigger; and
- deletion of the the UE Policy Association requested by the NF service consumer (e.g. AMF).
4.1.2 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 29.513 [7].
The UE Policy Control Service (Npcf_UEPolicyControl) is part of the Npcf service-based interface exhibited by the
Policy Control Function (PCF).
The known consumers of the Npcf_UEPolicyControl service are the Access and Mobility Management Function
(AMF) and the Visited Policy Control Function (V-PCF).
The AMF accesses the UE Policy Control Service at the PCF via the N15 Reference point. In the roaming scenario, the
N15 reference point is located between the V-PCF in the visited network and the AMF. The V-PCF accesses the UE
Policy Control Service at the Home Policy Control Function (H-PCF) via the N24 Reference point.

Figure 4.1.2-1: Reference Architecture for the Npcf_UEPolicyControl Service; SBI representation
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3GPP TS 29.525 version 15.2.0 Release 15 9 ETSI TS 129 525 V15.2.0 (2019-10)
PCF
N15
AMF

Figure 4.1.2-2: Non-roaming Reference Architecture for the Npcf_UEPolicyControlService; reference
point representation

Figure 4.1.3-2: Roaming reference Architecture for the Npcf_UEPolicyControlService; reference point
representation
4.1.3 Network Functions
4.1.3.1 Policy Control Function (PCF)
For non-roaming scenarios, the Policy Control Function (PCF):
- Supports unified policy framework to govern network behaviour; and
- Provides UE policy, including Access Network Discovery and Selection Policy (ANDSP) and UE Route
Selection Policy (URSP) via the AMF transparently to the UE; and
- Provides policy control request triggers to the AMF.
NOTE 1: The PCF invokes the Namf_Communication service specified in 3GPP TS 29.518 [14] to provide the UE
Policy.
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3GPP TS 29.525 version 15.2.0 Release 15 10 ETSI TS 129 525 V15.2.0 (2019-10)
For roaming scenarios, the Visited Policy Control Function (V-PCF):
- Provides policy control request triggers to the AMF;
- Provides the ANDSP of the VPLMN via the AMF transparently to the UE; and
- Forwards the ANDSP and URSP received form the H-PCF via the AMF to the UE.
NOTE 2: The V-PCF invokes the Namf_Communication service specified in 3GPP TS 29.518 [14] to provide the
UE Policy.
For roaming scenarios, the Home Policy Control Function (H-PCF):
- Provides policy control request triggers to the V-PCF; and
- Provides the ANDSP and URSP of the HPLMN to the V-PCF for forwarding to the UE via the the AMF.
4.1.3.2 NF Service Consumers
The Access and Mobility Management function (AMF) performs:
- Registration management;
- Connection management;
- Reachability management;
- Mobility Management;
- Forwardingof UE Policy towards the served UE;
- Reporting of the UE state to the (V-)PCF; and
- Forwarding of the UE policy enforcement result received from the UE to the (V-)PCF.
NOTE: The AMF invokes the Namf_Communication service specified in 3GPP TS 29.518 [14] to report the UE
policy enforcement result.
The Visited Policy Control Function (V-PCF) provides the functions described in subclause 4.1.3.1 towards the visited
network as NF service prodcer and a
...