1、 ETSI TS 129 554 V15.0.0 (2018-07) 5G; 5G System; Background Data Transfer Policy Control Service; Stage 3 (3GPP TS 29.554 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 129 554 V15.0.0 (2018-07)13GPP TS 29.554 version 15.0.0 Release 15Reference DTS/TSGC-0329554vf00 Keywords 5G ETSI
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13、itute an endorsement by ETSI of products, services or organizations associated with those trademarks. 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
14、 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 http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present d
15、ocument “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 exce
16、pt when used in direct citation. ETSI ETSI TS 129 554 V15.0.0 (2018-07)33GPP TS 29.554 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbre
17、viations . 7g34 Background Data Transfer Policy Control Service 7g34.1 Service Description 7g34.1.1 Overview 7g34.1.2 Service Architecture . 8g34.1.3 Network Functions 8g34.1.3.1 Policy Control Function (PCF) . 8g34.1.3.2 NF Service Consumers 9g34.2 Service Operations . 9g34.2.1 Introduction. 9g34.2
18、.2 Npcf_BDTPolicyControl_Create service operation . 9g34.2.2.1 General 9g34.2.2.2 Retrieval of BDT policies . 9g34.2.3 Npcf_BDTPolicyControl_Update service operation 11g34.2.3.1 General 11g34.2.3.2 Indication about selected transfer policy . 11g35 Npcf_BDTPolicyControl API 12g35.1 Introduction 12g35
19、.2 Usage of HTTP . 12g35.2.1 General 12g35.2.2 HTTP standard headers . 12g35.2.2.1 General 12g35.2.2.2 Content type 12g35.2.3 HTTP custom headers . 12g35.3 Resources . 13g35.3.1 Resource Structure 13g35.3.2 Resource: BDT policies (Collection) 13g35.3.2.1 Description 13g35.3.2.2 Resource definition .
20、 13g35.3.2.3 Resource Standard Methods 13g35.3.2.3.1 POST . 13g35.3.2.4 Resource Custom Operations 14g35.3.3 Resource: Individual BDT policy (Document) . 14g35.3.3.1 Description 14g35.3.3.2 Resource definition . 14g35.3.3.3 Resource Standard Methods 14g35.3.3.3.1 GET . 14g35.3.3.3.2 PATCH 15g35.4 Cu
21、stom Operations without associated resources. 15g35.5 Notifications . 16g35.6 Data Model . 16g35.6.1 General 16g35.6.2 Structured data types . 16g35.6.2.1 Introduction . 16g35.6.2.2 Type BdtPolicy . 17g35.6.2.3 Type BdtReqData 17g3ETSI ETSI TS 129 554 V15.0.0 (2018-07)43GPP TS 29.554 version 15.0.0
22、Release 155.6.2.4 Type BdtPolicyData 18g35.6.2.5 Type TransferPolicy 18g35.6.2.6 Type BdtPolicyDataPatch . 18g35.6.2.7 Type BdtPolicyPatch . 18g35.6.3 Simple data types and enumerations . 19g35.6.3.1 Introduction . 19g35.6.3.2 Simple data types 19g35.7 Error handling 19g35.7.1 General 19g35.7.2 Prot
23、ocol Errors 19g35.7.3 Application Errors 19g35.8 Feature negotiation . 19g3Annex A (normative): OpenAPI specification . 20g3A.1 General . 20g3A.2 Npcf_BDTPolicyControl API 20g3Annex B (informative): Change history . 24g3History 25g3ETSI ETSI TS 129 554 V15.0.0 (2018-07)53GPP TS 29.554 version 15.0.0
24、 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration 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 docum
25、ent, 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 contr
26、ol. 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 ETSI TS 129 554 V15.0.0 (2018-07)63GPP TS 29.554 version 15.0.0 Releas
27、e 151 Scope The present specification provides the stage 3 definition of the Background Data Transfer (BDT) Policy Control Service (Npcf_BDTPolicyControl) of the 5G System. The 5G System Architecture is defined in 3GPPg3TSg323.501 2. The stage 2 definition and related procedures for BDT Policy Contr
28、ol Service 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
29、.501 7. The Policy Control Function (PCF) provides the BDT Policy Control Service. This service provides background data transfer policy negotiation function. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
30、 - 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 (inclu
31、ding 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: “Procedur
32、es 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 A
33、rchitecture; Stage 3“. 7 3GPP TS 29.501: “5G System; Principles and Guidelines for Services Definition; 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 Specificat
34、ion“, https:/ 11 3GPP TS 29.504: “5G System; Unified Data Repository Services; Stage 3“. 12 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“. 13 3GPP TS 29.571: “5G System; Common Data Types for Serv
35、ice Based Interfaces; Stage 3“. 14 3GPP TS 29.122: “T8 reference point for Northbound APIs“. 15 IETF RFC 7396: “JSON Merge Patch“. ETSI ETSI TS 129 554 V15.0.0 (2018-07)73GPP TS 29.554 version 15.0.0 Release 153 Definitions and abbreviations 3.1 Definitions For the purposes of the present document,
36、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. Background data transfer: feature that enables a 3rd party service provider to keep their costs lowe
37、r by favouring time windows for data transfer to specific UEs in a geographical area during non-busy hours that are less costly and able to handle larger bitrates. For the purposes of the present document, the following terms and definitions given in 3GPP TS 23.501 2, subclause 3.1 apply: 5G System
38、Network Function NF service NF service operation Service based interface 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 a
39、bbreviation, if any, in 3GPP TR 21.905 1. AF Application Function API Application Programming Interface ASP Application Service Provider BDT Background Data Transfer HTTP Hypertext Transfer Protocol JSON JavaScript Object Notation NEF Network Exposure Function NF Network Function PCF Policy Control
40、Function RAI Routing Area IdentificationSBI Service Based Interface TAI Tracking Area Identity UDR Unified Data Repository URI Uniform Resource Identifier 4 Background Data Transfer Policy Control Service 4.1 Service Description 4.1.1 Overview The BDT Policy Control Service, as defined in 3GPP TS 23
41、.502 3 and 3GPP TS 23.503 4, is provided by the Policy Control Function (PCF). This service enables the NF service consumer to negotiate policy for a future background data transfer and offers the following functionalities: - get background data transfer policies based on the request from the NEF; a
42、nd - update background data transfer policies based on the selection provided by the NEF. ETSI ETSI TS 129 554 V15.0.0 (2018-07)83GPP TS 29.554 version 15.0.0 Release 154.1.2 Service Architecture The 5G System Architecture is defined in 3GPP TS 23.501 2. The Policy and Charging related 5G architectu
43、re is also described in 3GPP TS 29.513 5. The BDT Policy Control Service (Npcf_BDTPolicyControl) is part of the Npcf service-based interface exhibited by the Policy Control Function (PCF). The only known NF service consumer of the Npcf_BDTPolicyControl service is the Network Exposure Function (NEF).
44、 The NEF accesses the BDT Policy Control Service at the PCF via the N30 Reference point. In the roaming scenario, the N30 reference point is located between the PCF and the NEF in the home network only. PCFNEFNpcf_BDTPolicyControl NpcfFigure 4.1.2-1: Reference Architecture for the Npcf_BDTPolicyCont
45、rol Service; SBI representation PCFNEFN30Figure 4.1.2-2: Reference Architecture for the Npcf_BDTPolicyControl Service; reference point representation 4.1.3 Network Functions 4.1.3.1 Policy Control Function (PCF) The Policy Control Function (PCF): - Provides background data transfer policies based on
46、 the request from the NEF. The PCF determines, based on information provided by the NEF and other available information (e.g. network policy, load status estimation for the requested time window, network area, etc.) one or more transfer policies. - Updates background data transfer policy based on th
47、e selection provided by the NEF. ETSI ETSI TS 129 554 V15.0.0 (2018-07)93GPP TS 29.554 version 15.0.0 Release 154.1.3.2 NF Service Consumers The Network Exposure Function (NEF): - requests the PCF to provide background data transfer policies; and - provides the selected background data transfer poli
48、cy to the PCF. 4.2 Service Operations 4.2.1 Introduction Table 4.2.1-1: Operations of the Npcf_BDTPolicyControl Service Service operation name Description Initiated by Npcf_BDTPolicyControl_Create Provides the requested background data transfer policies to the NF service consumer. NF service consume
49、r (NEF) Npcf_BDTPolicyControl_Update Updates the PCF with the background data transfer policy selected by the NF service consumer. NF service consumer (NEF) 4.2.2 Npcf_BDTPolicyControl_Create service operation 4.2.2.1 General The Npcf_BDTPolicyControl_Create service operation is used by an NF service consumer to retrieve BDT policies from the PCF. The following procedure using the Npcf_BDTPolicyControl_Create service operation is supported: - retrieva
