1、 ETSI TS 129 153 V15.0.0 (2018-07) Universal Mobile Telecommunications System (UMTS); LTE; Service capability exposure functionality over Ns reference point (3GPP TS 29.153 version 15.0.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 129 153 V15.0.0 (2018-07)13GPP TS 29.153 version 15.0.0 Release
2、 15Reference RTS/TSGC-0329153vf00 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 Sous-Prfecture de Grasse (06) N 7803/88 Important no
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9、9.153 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 available for ETSI members and non-members, and can
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13、 those trademarks in the present document does not constitute 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
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15、/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 (Verbal forms for the expression of provisions). “must“
16、and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 129 153 V15.0.0 (2018-07)33GPP TS 29.153 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definit
17、ions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 6g34 Architectural Overview 6g34.0 Overview 6g34.1 Reference Model 6g34.2 Functional elements 6g34.2.1 RCAF 6g34.2.2 SCEF. 7g34.3 Procedures over the Ns reference point 7g34.3.1 Network status reporting procedures 7g34.3.1.1 General
18、7g34.3.1.2 Request of one-time or continuous reporting of network status 7g34.3.1.3 Continuous reporting of network status 8g34.3.1.4 Cancellation of continuous reporting of network status 8g34.3.2 RCAF selection . 9g35 Ns protocol . 9g35.1 Protocol support . 9g35.2 Initialization, maintenance and t
19、ermination of connection and session 9g35.3 Ns specific AVPs . 9g35.3.1 General 9g35.3.2 Network-Congestion-Area-Report AVP . 10g35.3.3 Ns-Request-Type AVP . 10g35.4 Ns re-used AVPs 10g35.4.1 General 10g35.4.2 Use of the Supported-Features AVP on the Ns reference point 11g35.5 Ns specific Experiment
20、al-Result-Code AVP values 12g35.5.1 General 12g35.5.2 Success 12g35.5.3 Permanent Failures . 12g35.5.4 Transient Failures . 12g35.6 Ns messages . 12g35.6.1 Command-Code Values 12g35.6.2 Network-Status-Request (NSR) command . 13g35.6.3 Network-Status-Answer (NSA) command . 13g35.6.4 Network-Status-Co
21、ntinuous-Report-Request (NCR) command . 13g35.6.5 Network-Status-Continuous-Report-Answer (NCA) command . 14g3Annex A (informative): Call Flows over Ns . 15g3A.1 Request of one time or continuous reporting of network status . 15g3A.2 Continuous reporting of network status . 15g3A.3 Cancellation of c
22、ontinuous reporting of network status . 16g3Annex B (informative): Change history . 17g3History 18 ETSI ETSI TS 129 153 V15.0.0 (2018-07)43GPP TS 29.153 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of t
23、he 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: Versi
24、on 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 thi
25、rd digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 129 153 V15.0.0 (2018-07)53GPP TS 29.153 version 15.0.0 Release 151 Scope This document defines the protocol for Ns reference point between the Service Capability Exposure Function (SCEF) and RAN
26、 Congestion Awareness Function (RCAF). The Ns reference point and related stage 2 procedures are defined in 3GPP TS 23.682 2. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific
27、 (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-speci
28、fic 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 23.682: “Architecture enhancements to facilitate communications with packet data networks and applications “. 3 IETF R
29、FC 3588: “Diameter Base Protocol“. 4 3GPP TS 29.217: “Congestion reporting over Np reference point“. 5 IETF RFC 7683: “Diameter Overload Indication Conveyance“. 6 3GPP TS 29.229: “Cx and Dx interfaces based on Diameter protocol; Protocol details“. 7 3GPP TS 29.336: “Home Subscriber Server (HSS) diam
30、eter interfaces for interworking with packet data networks and applications Diameter Base Protocol“. 8 3GPP TS 29.154: “Service Capability Exposure Functionality over Nt reference point“. 9 3GPP TS 29.274: “3GPP Evolved Packet System. Evolved GPRS Tunnelling Protocol for EPS (GTPv2)“. 10 IETF RFC 57
31、19: “Updated IANA Considerations for Diameter Command Code Allocations“. 11 IETF RFC 2234: “Augmented BNF for syntax specifications“. 12 3GPP TS 29.213: “Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping“. 13 IETF RFC 7944: “Diameter Routing Message Priority
32、“. 14 IETF draft-ietf-dime-load-09: “Diameter Load Information Conveyance“. Editors note: The above document cannot be formally referenced until it is published as an RFC. 15 IETF RFC 6733: “Diameter Base Protocol“. ETSI ETSI TS 129 153 V15.0.0 (2018-07)63GPP TS 29.153 version 15.0.0 Release 153 Def
33、initions 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 Abbreviatio
34、ns For the purposes of the present document, the abbreviations given in 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 TR 21.905 1. AS Application Server DRMP Diameter Routing Message Prio
35、rity NCA Network Status Continuous Report Answer NCR Network Status Continuous Report Request NSA Network Status Answer NSR Network Status RequestRCAF RAN Congestion Awareness Function SCEF Service Capability Exposure Function SCS Service Capability Server 4 Architectural Overview 4.0 Overview The N
36、s reference point is located between the RCAF and SCEF. The Ns reference point is used for network status reporting. The stage 2 level requirements for the Ns reference point are defined in 3GPP TS 23.682 2. Refer to Annex G of 3GPP TS 29.213 12 for Diameter overload control procedures over the Ns r
37、eference point. Refer to Annex J of 3GPP TS 29.213 12 for Diameter message priority mechanism procedures over the Ns interface. Refer to Annex K of 3GPP TS 29.213 12 for Diameter load control procedures over the Ns reference point. 4.1 Reference Model The Ns reference point is defined between the RC
38、AF and the SCEF to transfer the network status. The relationship between the two functional entities is depicted in figure 4.1.1. The complete 3GPP architecture for service capability exposure is defined in 3GPP TS 23.682 2. RCAF SCEF Ns Figure 4.1.1: Ns reference model 4.2 Functional elements 4.2.1
39、 RCAF The RCAF is a functional element which reports network status to the SCEF to enable the SCEF to take the RAN user plane congestion status into account. The network status includes the following information; ETSI ETSI TS 129 153 V15.0.0 (2018-07)73GPP TS 29.153 version 15.0.0 Release 15- Conges
40、tion level or an indication of the “no congestion“ state; - ECGI, or eNB-ID, or SAI for which the congestion level is being provided. 4.2.2 SCEF The SCEF is a functional element which provides a means to securely expose the services and capabilities provided by 3GPP network interfaces. Based on the
41、geographical area provided by the SCS/AS and the configuration data, the SCEF determines from which RCAF(s) to request congestion reporting. NOTE: The procedures in 3GPP TS 23.682 2, subclause 5.8, describe the interaction between the SCEF and SCS/AS and the information elements exchanged in the rel
42、evant steps of each procedure. When the SCEF receives the network status information from one or more RCAF(s) in both the one-time or continuous reporting cases, it determines the Network Status Indication (NSI) of the geographical area based on the CongestionLevel-Value AVP in the Network-Congestio
43、n-Area-Report AVP it receives from the RCAF(s). The NSI value (e.g. High, Medium, Low, No-Congestion) is determined per Service Provider policies. 4.3 Procedures over the Ns reference point 4.3.1 Network status reporting procedures 4.3.1.1 General This clause contains the detailed procedures for: -
44、Requesting one-time or continuous network status report ; - Continuous reporting of network status; - Cancellation of continuous reporting of network status. 4.3.1.2 Request of one-time or continuous reporting of network status This procedure shall be used by the SCEF to request one-time or continuo
45、us network status report. This procedure is mapped to Network-Status-Request /Answer commands specified in subclause 5.6. After the SCEF authorized a SCS/AS request for notification about the network status, the SCEF shall assign an SCEF Reference ID and identify the RCAF(s) responsible for requesti
46、ng of the network status report. The identity of the RCAF is found by the SCEF based on the RCAF selection procedure defined in subclause 4.3.2. If multiple RCAFs have been found, the procedure shall be invoked multiple times, for each RCAF responsible for the network status report. The SCEF shall s
47、end a Network-Status-Request (NSR) command to the targeted RCAF. The NSR shall include the Ns-Request-Type AVP with the value 0 (initial request), the SCEF reference ID within SCEF-Reference-ID AVP and the location area in the Network-Area-Info-List AVP, the location area is either a 3GPP location a
48、rea (e.g. list of TA/RAs, list of cell(s), list of eNBs etc) according to operator configuration or a 3GPP location area (e.g. list of TA/RAs, list of cell(s), list of eNBs etc) as provided by the SCS/AS. The SCEF may also include duration in the Monitoring-Duration AVP and the threshold value(s) in
49、 Congestion-Level-Range AVP if the SCS/AS requested reporting for specific threshold(s). The duration indicates the time for which a continuous reporting is requested. The SCEF, based on operator policies, may choose a different threshold value than the one received from the SCS/AS. The SCEF shall not include the Congestion-Level-Range AVP in the request to the RCAF if no threshold was requested by the SCS/AS. NOTE: The SCS/AS can be notified when the SCEF changes the threshold provided by the SCS/AS. If the continuous repo
