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TECHNICAL SPECIFICATION
5G;
5G System;
UE Policy Control Service;
Stage 3
(3GPP TS 29.525 version 15.0.0 Release 15)
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3GPP TS 29.525 version 15.0.0 Release 15 1 ETSI TS 129 525 V15.0.0 (2019-04)
Reference
DTS/TSGC-0329525vf00
Keywords
5G
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3GPP TS 29.525 version 15.0.0 Release 15 2 ETSI TS 129 525 V15.0.0 (2019-04)
Intellectual Property Rights
Essential patents
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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 29.525 version 15.0.0 Release 15 3 ETSI TS 129 525 V15.0.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 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 . 7
4.1 Service Description . 7
4.1.1 Overview . 7
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 . 9
4.2 Service Operations . 10
4.2.1 Introduction. 10
4.2.2 Npcf_UEPolicyControl_Create Service Operation . 10
4.2.2.1 General . 10
4.2.2.2 UE Policy . 12
4.2.2.2.1 General . 12
4.2.2.2.2 UE Access Network discovery and selection policies . 13
4.2.2.2.3 UE Route Selection Policy(URSP) . 13
4.2.3 Npcf_UEPolicyControl_Update Service Operation . 14
4.2.3.1 General . 14
4.2.3.2 Policy Control Request Triggers . 15
4.2.3.3 Encoding of updated policy. 15
4.2.4 Npcf_UEPolicyControl_UpdateNotify Service Operation . 16
4.2.4.1 General . 16
4.2.4.2 Policy update notification . 16
4.2.4.3 Request for termination of the policy association . 16
4.2.5 Npcf_UEPolicyControl_Delete Service Operation . 17
5 Npcf_UEPolicyControl API . 18
5.1 Introduction . 18
5.2 Usage of HTTP . 19
5.2.1 General . 19
5.2.2 HTTP standard headers . 19
5.2.2.1 General . 19
5.2.2.2 Content type . 19
5.2.3 HTTP custom headers . 19
5.3 Resources . 19
5.3.1 Resource Structure . 19
5.3.2 Resource:UE Policy Associati ons . 20
5.3.2.1 Description . 20
5.3.2.2 Resource definition . 20
5.3.2.3 Resource Standard Methods . 20
5.3.2.3.1 POST . 20
5.3.3 Resource: Individual UE Policy Association . 21
5.3.3.1 Description . 21
5.3.3.2 Resource definition . 21
5.3.3.3 Resource Standard Methods . 21
5.3.3.3.1 GET . 21
5.3.3.3.2 DELETE . 21
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3GPP TS 29.525 version 15.0.0 Release 15 4 ETSI TS 129 525 V15.0.0 (2019-04)
5.3.3.4 Resource Custom Operations . 22
5.3.3.4.1 Overview . 22
5.3.3.4.2 Operation: Update . 22
5.3.3.4.2.1 Description . 22
5.3.3.4.2.2 Operation Definition . 22
5.4 Custom Operations without associated resources. 22
5.5 Notifications . 23
5.5.1 General . 23
5.5.2 Policy Update Notification . 23
5.5.2.1 Description . 23
5.5.2.2 Operation Definition . 23
5.5.3 Request for termination of the UE policy association. 23
5.5.3.1 Description . 23
5.5.3.2 Operation Definition . 23
5.6 Data Model . 24
5.6.1 General . 24
5.6.2 Structured data types . 25
5.6.2.1 Introduction . 25
5.6.2.2 Type PolicyAssociation . 25
5.6.2.3 Type PolicyAssociationRequest . 26
5.6.2.4 Type PolicyAssociationUpdateRequest . 27
5.6.2.5 Type PolicyUpdate . 27
5.6.2.6 Type TerminationNotification. 28
5.6.3 Simple data types and enumerations . 28
5.6.3.1 Introduction . 28
5.6.3.2 Simple data types . 28
5.6.3.3 Enumeration: RequestTrigger . 28
5.6.3.4 Enumeration: PolicyAssociationReleaseCause . 28
5.7 Error handling . 29
5.7.1 General . 29
5.7.2 Protocol Errors . 29
5.7.3 Application Errors . 29
5.8 Feature negotiation . 29
5.9 Security . 29
Annex A (normative): OpenAPI specification . 31
A.1 General . 31
A.2 Npcf_UEPolicyControl API . 31
Annex B (informative): Change history . 37
History . 38
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3GPP TS 29.525 version 15.0.0 Release 15 5 ETSI TS 129 525 V15.0.0 (2019-04)
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 15.0.0 Release 15 6 ETSI TS 129 525 V15.0.0 (2019-04)
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".
[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".
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[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".
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
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
PCF Policy Control Function
PEI Permanent Equipment Identifier
PRA Presence Reporting Area
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
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 provides UE policies such as the UE Route Selection Policy to the UE via the AMF;
and offers the following functionalities:
- policy creation based on a request from the AMF during UE registration;
- notification of the AMF of the updated policies which are subscribed; and
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- deletion of the policy context for a UE.
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
Figure 4.1.2-2: Non-roaming Reference Architecture for the Npcf_UEPolicyControlService; reference
point representation
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3GPP TS 29.525 version 15.0.0 Release 15 9 ETSI TS 129 525 V15.0.0 (2019-04)
H-PCF
N24
V-PCF
N15
AMF
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)
The Policy Control Function (PCF):
- Supports unified policy framework to govern network behaviour; and
- Provides UE policy rules, including Access Network discovery and selection policies and UE Route Selection
Policies.
4.1.3.2 NF Service Consumers
The Access and Mobility Management function (AMF) provides:
- Registration management;
- Connection management;
- Reachability management;
- Mobility Management; and
- Sending of UE Policy towards the served UE.
The Visited Policy Control Function (V-PCF) provides the functions described in subclause 4.1.3.1 towards the visited
network.
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4.2 Service Operations
4.2.1 Introduction
Table 4.2.1-1: Operations of the Npcf_UEPolicyControl Service
Service operation name Description Initiated by
Npcf_UEPolicyControl_Create Creates a UE Policy Association. NF consumer (AMF,
V-PCF in roaming
case)
Npcf_UEPolicyControl_Update Updates of an UE Policy Association and provides NF consumer (AMF,
corresponding policies to the NF consumer when V-PCF in roaming
the policy control request trigger is met or the AMF case)
is relocated due to the UE mobility and the old PCF
is selected.
Npcf_UEPolicyControl_UpdateNotify Provides updated policies to the V-PCF by the H- H-PCF for policy
PCF or initiates the UE Policy association update,
termination towards to the NF consumer by the NF PCF for initiating the
producer. UE policy association
termination (H-PCF
and V-PCF in
roaming case)
Npcf_UEPolicyControl_Delete Provides means for the NF consumer to delete the NF consumer (AMF,
UE Policy Association. V-PCF in roaming
case)
4.2.2 Npcf_UEPolicyControl_Create Service Operation
4.2.2.1 General
The procedure in the present subclause is applicable when the NF service consumer creates a UE policy association
when the UE registers to the network, and when the the AMF is relocated (between the different AMF sets) and the new
AMF selects a new PCF. The procedure for the case where the AMF is relocated and the new AMF selects the old PCF
is defined in subclause 4.2.3.1.
Figure 4.2.2.1-1 illustrates the creation of a policy association.
Figure 4.2.2.1-1: Creation of a UE policy association
When a UE registers and a UE context is being established, the AMF can obtain from the UE an UP
...