ETSI TS 123 503 V15.8.0 (2020-01)

5G; Policy and charging control framework for the 5G System (5GS); Stage 2 (3GPP TS 23.503 version 15.8.0 Release 15)

RTS/TSGS-0223503vf80

General Information

• Status: Published
• Publication Date: 12-Jan-2020
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Completion
• Completion Date: 13-Jan-2020

Standards Content (Sample)

ETSI TS 123 503 V15.8.0 (2020-01)






TECHNICAL SPECIFICATION
5G;
Policy and charging control framework
for the 5G System (5GS);
Stage 2
(3GPP TS 23.503 version 15.8.0 Release 15)

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3GPP TS 23.503 version 15.8.0 Release 15 1 ETSI TS 123 503 V15.8.0 (2020-01)



Reference
RTS/TSGS-0223503vf80
Keywords
5G
ETSI
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3GPP TS 23.503 version 15.8.0 Release 15 2 ETSI TS 123 503 V15.8.0 (2020-01)
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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ETSI

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3GPP TS 23.503 version 15.8.0 Release 15 3 ETSI TS 123 503 V15.8.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
Introduction . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 9
4 High level architectural requirements . 9
4.1 General requirements . 9
4.2 Non-session management related policy control requirements . 9
4.2.1 Access and mobility related policy control requirements . 9
4.2.2 UE access selection and PDU Session selection related policy (UE policy) control requirements . 10
4.2.3 Network status analytics information requirements . 10
4.2.4 Management of packet flow descriptions . 10
4.3 Session management related policy control requirements . 10
4.3.1 General requirements . 10
4.3.2 Charging related requirements . 11
4.3.3 Policy control requirements . 11
4.3.3.1 Gating control requirements . 11
4.3.3.2 QoS control requirements . 11
4.3.3.2.1 QoS control at service data flow level . 11
4.3.3.2.2 QoS control at QoS Flow level . 11
4.3.3.2.3 QoS control at PDU Session level . 12
4.3.3.3 Subscriber spending limits requirements . 12
4.3.4 Usage monitoring control requirements . 12
4.3.5 Application detection and control requirements . 13
4.3.6 Support for service capability exposure . 13
4.3.7 Traffic steering control . 13
5 Architecture model and reference points . 13
5.1 General . 13
5.2 Reference architecture . 14
5.2.1 Non-roaming architecture . 14
5.2.2 Roaming architecture . 15
5.2.3 Interworking with AFs supporting Rx interface . 17
5.3 Service-based interfaces and reference points . 17
5.3.1 Interactions between PCF and AF . 17
5.3.2 Interactions between PCF and SMF . 17
5.3.3 Interactions between PCF and AMF . 18
5.3.4 Interactions between V-PCF and H-PCF . 18
5.3.5 Interactions between PCF and UDR . 18
5.3.6 Interactions between SMF and CHF . 19
5.3.7 Void . 19
5.3.8 Interactions between PCF and CHF . 19
5.3.9 Interactions between SMF and NEF . 19
5.3.10 Interactions between NEF and PCF . 19
5.3.11 Interactions between NWDAF and PCF . 20
6 Functional description . 20
6.1 Overall description . 20
6.1.1 General . 20
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3GPP TS 23.503 version 15.8.0 Release 15 4 ETSI TS 123 503 V15.8.0 (2020-01)
6.1.1.1 PCF Discovery and Selection . 20
6.1.1.2 Binding an AF request targeting an UE address to the relevant PCF . 20
6.1.1.2.1 General . 20
6.1.1.2.2 The Binding Support Function (BSF). 21
6.1.1.3 Policy decisions based on network analytics. 21
6.1.2 Non-session management related policy control . 22
6.1.2.1 Access and mobility related policy control . 22
6.1.2.2 UE access selection and PDU Session selection related policy (UE policy) control . 22
6.1.2.2.1 General . 22
6.1.2.2.2 Distribution of the policies to UE . 24
6.1.2.3 Management of packet flow descriptions . 26
6.1.2.3.1 PFD management . 26
6.1.2.3.2 Packet Flow Description . 27
6.1.2.4 Negotiation for future background data transfer . 28
6.1.2.5 Policy Control Request Triggers relevant for AMF . 29
6.1.3 Session management related policy control . 29
6.1.3.1 General . 29
6.1.3.2 Binding mechanism . 30
6.1.3.2.1 General . 30
6.1.3.2.2 Session binding . 30
6.1.3.2.3 PCC rule authorization . 30
6.1.3.2.4 QoS Flow binding. 31
6.1.3.3 Reporting . 32
6.1.3.4 Credit management . 32
6.1.3.5 Policy Control Request Triggers relevant for SMF . 32
6.1.3.6 Policy control . 38
6.1.3.7 Service (data flow) prioritization and conflict handling . 38
6.1.3.8 Termination action . 39
6.1.3.9 Handling of packet filters provided to the UE by SMF . 39
6.1.3.10 IMS emergency session support . 39
6.1.3.11 Multimedia Priority Service support . 40
6.1.3.12 Redirection . 41
6.1.3.13 Resource sharing for different AF sessions . 41
6.1.3.14 Traffic steering control . 41
6.1.3.15 Resource reservation for services sharing priority . 41
6.1.3.16 3GPP PS Data Off . 42
6.1.3.17 Policy decisions based on spending limits . 43
6.1.3.18 Event reporting from the PCF . 44
6.1.3.19 Mission Critical Services support . 44
6.2 Network functions and entities . 45
6.2.1 Policy Control Function (PCF) . 45
6.2.1.1 General . 45
6.2.1.2 Input for PCC decisions . 46
6.2.1.3 Policy control subscription information management . 49
6.2.1.4 V-PCF . 52
6.2.1.5 H-PCF . 52
6.2.1.6 Application specific policy information management. 52
6.2.2 Session Management Function (SMF) . 53
6.2.2.1 General . 53
6.2.2.2 Service data flow detection . 53
6.2.2.3 Measurement . 53
6.2.2.4 QoS control . 53
6.2.2.5 Application detection . 54
6.2.2.6 Traffic steering . 54
6.2.3 Application Function (AF) . 54
6.2.4 Unified Data Repository (UDR) . 55
6.2.5 Charging Function (CHF) . 55
6.2.6 Void . 55
6.2.7 Network Exposure Function (NEF) . 55
6.2.8 Access and Mobility Management Function (AMF) . 55
6.2.9 Network Data Analytics Function (NWDAF) . 56
6.3 Policy and charging control rule . 56
ETSI

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3GPP TS 23.503 version 15.8.0 Release 15 5 ETSI TS 123 503 V15.8.0 (2020-01)
6.3.1 General . 56
6.3.2 Policy and charging control rule operations . 64
6.4 PDU Session related policy information . 64
6.5 Access and mobility related policy information . 69
6.6 UE access selection and PDU Session selection related policy information . 70
6.6.1 Access Network Discovery & Selection Policy Information . 70
6.6.1.1 General . 70
6.6.1.2 UE selecting a WLANSP rule . 71
6.6.1.3 UE procedure for selecting a WLAN access based on WLANSP rules . 71
6.6.2 UE Route Selection Policy information . 72
6.6.2.1 Structure Description . 72
6.6.2.2 Configuration and Provision of URSP . 74
6.6.2.3 UE procedure for associating applications to PDU Sessions based on URSP . 74
Annex A (informative): URSP rules example . 77
Annex B (informative): Deployment option to support of BSF and DRA coexistence due to
network migration . 79
Annex C (informative): Change history . 80
History . 84

ETSI

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3GPP TS 23.503 version 15.8.0 Release 15 6 ETSI TS 123 503 V15.8.0 (2020-01)
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.
Introduction
For references to TS 23.203 [4] made in this document,
- the IP-CAN session of TS 23.203 [4] maps to the PDU Session in 5GC.
- the APN of TS 23.203 [4] maps to DNN in 5GC.
- the IP-CAN bearer of TS 23.203 [4] maps to the QoS Flow in 5GC.
- The PCRF of TS 23.203 [4] maps to the PCF in 5GC.
- The PCEF of TS 23.203 [4] maps to the combination of SMF and UPF in 5GC.
- The BBF shall be considered as being located in the PCEF.
- TDF related description does not apply.
- NBIFOM related description does not apply.
ETSI

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3GPP TS 23.503 version 15.8.0 Release 15 7 ETSI TS 123 503 V15.8.0 (2020-01)
1 Scope
The present document defines the Stage 2 policy and charging control framework for the 5G System specified in
TS 23.501 [2] and TS 23.502 [3].
The policy and charging control framework encompasses the following high level functions:
- Flow Based Charging for network usage, including charging control and online credit control, for service data
flows;
- Policy control for session management and service data flows (e.g. gating control, QoS control, etc.);
- Management for access and mobility related policies;
- Management for UE access selection and PDU Session selection related policies.
It refers to the policy and charging control functionality specified in TS 23.203 [4] for policy and charging control for
PDU Sessions, depicting the differences where those exist.
Interworking with E-UTRAN connected to EPC is described in TS 23.501 [2].
TS 23.502 [3] contains the stage 2 procedures and flows for the policy and charging control framework and it is a
companion specification to this specification.
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: "Technical Specification Group Services and System Aspects; System
Architecture for the 5G System".
[3] 3GPP TS 23.502: "Procedures for the 5G System; Stage 2".
[4] 3GPP TS 23.203: "Policies and Charging control architecture; Stage 2".
[5] 3GPP TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2".
[6] 3GPP TS 23.179: "Functional architecture and information flows to support mission-critical
communication service; Stage 2".
[7] 3GPP TS 23.335: "User Data Convergence (UDC); Technical realization and information flows;
Stage 2".
[8] 3GPP TS 32.240: "Charging management; Charging architecture and principles".
[9] 3GPP TS 23.402: "Architecture enhancements for non-3GPP accesses".
[10] 3GPP TS 23.161: "Network-Based IP Flow Mobility (NBIFOM); Stage 2".
[11] 3GPP TS 23.261: "IP flow mobility and seamless Wireless Local Area Network (WLAN) offload;
Stage 2".
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3GPP TS 23.503 version 15.8.0 Release 15 8 ETSI TS 123 503 V15.8.0 (2020-01)
[12] 3GPP TS 23.167: "3rd Generation Partnership Project; Technical Specification Group Services
and Systems Aspects; IP Multimedia Subsystem (IMS) emergency sessions".
[13] 3GPP TS 29.507: "Access and Mobility Policy Control Service; Stage 3".
[14] Void.
[15] 3GPP TS 22.011: "Service Access
...