1、 ETSI TS 129 201 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); LTE; Representational State Transfer (REST) reference point between Application Function (AF) and Protocol Converter (PC) (3GPP TS 29.201 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 129 201 V15.
2、0.0 (2018-07)13GPP TS 29.201 version 15.0.0 Release 15Reference RTS/TSGC-0329201vf00 Keywords LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la S
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9、n. ETSI ETSI TS 129 201 V15.0.0 (2018-07)23GPP TS 29.201 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly a
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14、ship 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 iden
15、tities can be found under http:/webapp.etsi.org/key/queryform.asp. 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 (Verb
16、al forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 129 201 V15.0.0 (2018-07)33GPP TS 29.201 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g
17、3Foreword . 5g31 Scope 6g32 References 6g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 7g34 Representational State Transfer (REST) reference point based on Protocol Converter (PC) architecture . 7g34.1 Overview 7g34.2 Reference model . 8g34.3 Functional elements 8g34.3
18、.1 Application function . 8g34.3.2 Protocol converter . 8g34.4 Location of the PC within the PLMN . 9g34.4.1 General 9g34.4.2 Protocol converter located in the PLMN but outside of the PCRF realm . 9g34.4.3 Protocol converter located in the PCRF realm 9g34.5 PCC Procedures over the RESTful reference
19、point 10g34.5.1 General 10g34.5.2 Initial Provisioning of Session Information 10g34.5.3 Modification of Session Information 11g34.5.4 AF Session Termination . 12g34.5.5 Gate Related Procedures . 12g34.5.6 Subscription to Notification of Signalling Path Status . 12g34.5.7 Traffic Plane Events 13g35 P
20、rotocol 13g35.1 Introduction 13g35.2 Transport layer . 14g35.3 Application delivery layer 14g35.3.1 Methods 15g35.3.2 Void 15g35.3.3 Resources and URI design 15g35.3.4 HTTP request/response dialogues . 16g35.3.5 AF Session ID . 17g35.4 Specific application communication 18g35.4.0 General 18g35.4.1 C
21、ontent type XML 18g35.4.1.1 XML schema . 18g35.4.1.2 Data types and mapping between XML elements . 18g35.4.1.3 Mapping between Diameter AVPs and XML elements and groups 18g35.5 PC discovery 21g36 Routing . 21g36.1 PC located in the PLMN but outside of the PCRF realm . 21g36.2 PC located in the PCRF
22、realm 21g37 Secure communication . 22g3Annex A (informative): Call Flows . 23g3A.1 General . 23g3ETSI ETSI TS 129 201 V15.0.0 (2018-07)43GPP TS 29.201 version 15.0.0 Release 15A.2 AF session establishment . 23g3A.3 AF Session Modification Initiated by AF 23g3A.4 AF Session Termination . 24g3A.5 Gate
23、 Related Procedures 24g3A.6 Subscription to Notification of Signalling Path Status . 25g3A.7 Notification of Traffic Plane Events 25g3A.7.1 Traffic plane event reporting 25g3A.7.2 Service data flow deactivation when all service data flows are affected 26g3A.7.3 IP-CAN Session Termination . 27g3Annex
24、 B (normative): XML Schema 29g3B.1 XML elements and groups . 29g3B.2 Diameter message representation . 32g3Annex C (informative): Change history . 36g3History 37g3ETSI ETSI TS 129 201 V15.0.0 (2018-07)53GPP TS 29.201 version 15.0.0 Release 15Foreword This Technical Specification has been produced by
25、 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
26、 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,
27、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 129 201 V15.0.0 (2018-07)63GPP TS 29.201 version 15.0.0 Release 151 Scope The present document describes the Representational Stat
28、e Transfer (REST) reference point, which is used to exchange application level session information between the Protocol Converter (PC) and the Application Function (AF). REST shall be used as an architectural style as appropriate. 2 References The following documents contain provisions which, throug
29、h 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 late
30、st 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 TR 29.817: “Stud
31、y on XML based access of AF to the PCRF“. 3 3GPP TS 29.213: “Policy and Charging Control signalling flows and Quality of Service (QoS) parameter mapping“. 4 3GPP TS 29.214: “Policy and Charging Control over Rx reference point“. 5 3GPP TS 23.203: “Policy and Charging Control architecture“. 6 Void. 7
32、Void. 8 IETF RFC 793: “Transmission Control Protocol“. 9 IETF RFC 2616: “Hypertext Transfer Protocol HTTP/1.1“. 10 IETF RFC 3986: “Uniform Resource Identifier (URI): Generic Syntax“. 11 IETF RFC 1035: “Domain Names Implementation and Specification“. 12 IETF RFC 2131: “Dynamic Host Configuration Prot
33、ocol“. 13 3GPP TS 33.310: “Network Domain Security (NDS); Authentication Framework (AF)“. 14 IETF RFC 2818: “HTTP Over TLS“. 15 IETF RFC 1786: “Uniform Resource Locators (URL)“. 16 Void. 17 IETF RFC 6733: “Diameter Base Protocol“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of t
34、he 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 ETSI TS 129 201 V15.0.0 (2018-07)73GPP TS 29.201 version 15.0.0 Release 15
35、Application Function (AF): element offering application(s) that use IP bearer resources. Protocol Converter (PC): element that converts the RESTful/XML based Rx reference point to the Diameter based Rx reference point. Representation: is a view of a resource state, it is encoded in one or more trans
36、ferable formats, such as XML, JSON, plain text or other formats. RESTful HTTP: is an architectural style consisting of a coordinated set of architectural constraints applied to components, connectors, and data elements, within a distributed hypermedia system applied to the development of web service
37、s. REST-Rx: term that is used to indicate the Rx interface based on RESTful HTTP between the AF and the PC. 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 precedenc
38、e over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. AAA Authentication, Authorization, Accounting AF Application Function API Application Programming Interface BBERF Bearer Binding and Event Reporting Function DHCP Dynamic Host Configuration Protocol DNS Domain Name System D
39、RA Diameter Routing AgentDRMP Diameter Routing Message Priority DSCP Differentiated Services Code Point HTTP HyperText Transfer Protocol HTTPS Hypertext Transfer Protocol Secure IP-CAN IP Connectivity Access Network PC Protocol Converter PCC Policy and Charging Control PCEF Policy and Charging Enfor
40、cement Function PCRF Policy and Charging Rules Function PDN Packet Data Network PLMN Public Land Mobile Network QoS Quality of Service REST Representational State Transfer SPR Subscription Profile Repository UDR User Data Repository URI Uniform Resource Identifier URL Uniform Resource Locator UE Use
41、r Equipment XML Extensible Markup Language 4 Representational State Transfer (REST) reference point based on Protocol Converter (PC) architecture 4.1 Overview The Representational State Transfer (REST) reference point resides between the AF and the Protocol Converter (PC). The PC converts applicatio
42、n level information received from the AF to Diameter session information and communicates with the PCRF via the Diameter based Rx reference point (3GPP TS 29.214 4). ETSI ETSI TS 129 201 V15.0.0 (2018-07)83GPP TS 29.201 version 15.0.0 Release 154.2 Reference model The Rx reference point, which is ba
43、sed on Diameter, is defined between the PCRF and the AF in 3GPP TS 29.214 4. If the AF supports RESTful HTTP and XML a Protocol Converter (PC) is needed. In this specification the interface between the AF and the PC is named REST-Rx. The REST-Rx interface shall be used in non-IMS scenarios only. The
44、 PC converts the information, received over the REST-Rx interface, into information that can be used on the Diameter based Rx interface in order to get an access to the PCC architecture and vice versa. The PC manages RESTful resources, which are an integral part of the REST-Rx interface. As defined
45、in the stage 2 specifications (3GPP TS 23.203 5), information from the AF is part of the input used by the PCRF for Policy and Charging Control (PCC) decisions. Signalling flows are specified in Annex A. The overall PCC architecture is depicted in subclause 3a of 3GPP TS 29.2133. The relationships b
46、etween the different functional entities involved are depicted in figure 4.2.1. PCg3REST-Rxg3AFg3PCRFg3Rxg3Figure 4.2.1: The REST-Rx reference model NOTE: The PCRF and PC are both together either located in the VPLMN or HPLMN. The AF is either in the same PLMN as the PC, or it is in a third part net
47、work attached to that PLMN. Figure 4.2.2: Void Figure 4.2.3: Void Figure 4.2.4: Void Figure 4.2.5: Void Figure 4.2.6: Void 4.3 Functional elements 4.3.1 Application function The AF is an element offering applications that require the Policy and Charging Control of traffic plane resources (e.g. UMTS
48、PS domain/GPRS domain resources). The AF shall use the Rx reference point to provide session information to the PCRF. NOTE: The AFs may be deployed by the same operator offering the IP-CAN or may be provided by external third party service provider. 4.3.2 Protocol converter If the AF only supports R
49、ESTful HTTP and XML a protocol converter is needed between the AF and the PCRF. ETSI ETSI TS 129 201 V15.0.0 (2018-07)93GPP TS 29.201 version 15.0.0 Release 15The Protocol converter (PC) is an element converting information carried over RESTful HTTP and XML to information carried over Diameter in order to get an access to the PCC architecture. 4.4 Location of the PC within the PLMN 4.4.1 General The protocol converter can be located: (1) In the PLMN but outside of the PCRF realm; (2) In the PCRF realm. There is only one log
