1、 ETSI TS 123 085 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Closed User Group (CUG) supplementary service; Stage 2 (3GPP TS 23.085 version 15.0.0 Release 15) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUN
2、ICATIONSRETSI ETSI TS 123 085 V15.0.0 (2018-07)13GPP TS 23.085 version 15.0.0 Release 15Reference RTS/TSGC-0423085vf00 Keywords GSM,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 Associatio
3、n but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print ver
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9、ed and owned by the GSM Association. ETSI ETSI TS 123 085 V15.0.0 (2018-07)23GPP TS 23.085 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 ess
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13、, and conveys no right to use or reproduce any trademark and/or tradename. Mention of 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 produ
14、ced 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 bet
15、ween GSM, UMTS, 3GPP and ETSI identities 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.
16、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 ETSI TS 123 085 V15.0.0 (2018-07)33GPP TS 23.085 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Forewo
17、rd . 2g3Modal verbs terminology 2g3Foreword . 4g30 Scope 5g30.1 References 5g30.2 Definitions 5g30.3 Abbreviations . 5g31 Closed user group (CUG) . 6g31.1 Handling of Closed User Group . 6g31.1.1 Mobile Originated (MO) CUG call handling 6g31.1.1.1 MO CUG call handling at the MSC 6g31.1.1.2 MO CUG ca
18、ll handling at the VLR 6g31.1.2 Mobile Terminated (MT) CUG call handling . 7g31.1.2.1 MT CUG handling at the GMSC 7g31.1.2.2 MT CUG handling functions at the HLR 7g31.1.2.3 MT CUG handling functions at the MSC . 7g31.1.2.4 MT CUG handling functions at the VLR 7g31.1.3 CUG subscriber roaming requirem
19、ents. 8g31.1.4 CUG interworking requirements . 8g31.1.4.1 Non-CUG GSM PLMNs . 8g31.1.4.2 Interworking to Non-CUG networks . 8g31.1.5 Supplementary service interactions 8g31.1.5.1 Interaction with Call Forwarding 8g31.1.5.2 Interaction with call waiting 9g31.1.5.3 Interaction with Anonymous Call Reje
20、ction . 9g31.2 Functions and information flows 9g31.2.1 Functions 9g31.2.2 Information flows . 11g31.3 Information stored in the HLR . 17g31.4 Information stored in the VLR . 18g31.5 Handover 18g31.6 Cross phase compatibility 18g31.6.1 MSC, VLR only support phase 1 18g31.6.2 GMSC only supports phase
21、 1 . 18g3Annex A (informative): Change history . 20g3History 21g3ETSI ETSI TS 123 085 V15.0.0 (2018-07)43GPP TS 23.085 version 15.0.0 Release 15Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to
22、 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:
23、 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 edito
24、rial only changes have been incorporated in the document. ETSI ETSI TS 123 085 V15.0.0 (2018-07)53GPP TS 23.085 version 15.0.0 Release 150 Scope The present document gives the stage 2 description of the closed user group supplementary service. The community of interest supplementary service defined
25、is: - closed user group (CUG) (see clause 1). 0.1 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
26、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
27、same Release as the present document. 1 3GPP TR 21.905: “ Vocabulary for 3GPP Specifications “. 2 3GPP TS 22.085: “Closed User Group (CUG) Supplementary Services; Stage 1“. 3 3GPP TS 23.088: “Call Barring (CB) Supplementary Service; Stage 2“. 0.2 Definitions CUG terminology defined in 3GPP TS 22. 08
28、5 2 is applicable to the present document. In addition, the following definitions apply. CUG Authorisation Functions: Checks performed by the network to ensure that the integrity of a CUG related call is guarantied. CUG calls are rejected if they do not meet the criteria of these checks. CUG call: C
29、UG call, in signalling terms, is a call where CUG information is passed from the originating switching entity to the destination entity. CUG Index: Code used to select a CUG for an outgoing call, or to indicate an incoming CUG call. Indices are passed between the user and the network and have signif
30、icance only within the context of a users subscription. CUG Interlock Code: Code which uniquely identifies a CUG within a network. The Interlock code is passed from the point of origin to the destination in a CUG call to identify the CUG which has been invoked. CUG Related Call Barring: CUG related
31、call barring is call barring applied to a CUG subscriber by the home network when roaming in a non-CUG network. The user is unable to remove CUG related call barring. Explicit CUG Invocation: Explicit CUG invocation is where a calling user attempts to invoke a CUG by passing CUG information to the n
32、etwork in a call request. Implicit CUG Invocation: Implicit CUG invocation is where the user invokes some default characteristic of a CUG without providing any CUG information in the call request. Normal Call: Normal call in the context of this CUG TS is a call established from a CUG subscriber wher
33、e no CUG information is passed from the originating switching entity to the destination entity. Outgoing Access Indicator: Indication passed from the point of origin to the destination in a CUG call to indicate that the calling user has subscribed to the Outgoing Access inter-CUG accessibility subsc
34、ription option. 0.3 Abbreviations In addition to those listed below abbreviations used in the present document are listed in 3GPP TR 21.905 1. ETSI ETSI TS 123 085 V15.0.0 (2018-07)63GPP TS 23.085 version 15.0.0 Release 15For the purposes of the present document, the following abbreviations apply: B
35、S Basic Service CI CUG Index CUG Closed User Group IA Incoming Access IC Interlock CodeIC(pref) Interlock code of the preferential CUG IC+OA Interlock Code and Outgoing Access indicator. ICB Incoming Calls Barred within the CUG OA Outgoing Access OCB Outgoing Calls Barred within the CUG Pref CUG Pre
36、ferential CUG SOA Suppress OA SPC Suppress Preferential CUG 1 Closed user group (CUG) The responsibilities of GSM network nodes with respect to CUG are described in the CUG handling clause. The Functions subclause 1.2.1 describes the CUG service logic and how CUG information is used. The flow of CUG
37、 information in various call cases is shown in the Information Flows subclause 1.2.2. 1.1 Handling of Closed User Group A GSM PLMN supporting the CUG supplementary service must guarantee the integrity of any CUG which it handles. It is not however mandatory for a PLMN to support the CUG supplementar
38、y service. A CUG is uniquely identified within a network by a CUG Interlock Code. The Interlock Code is transferred between terrestrial network entities to indicate a CUG call. A user identifies a CUG by a CUG Index. A CUG Index is used to select or indicate the use of a specific CUG in relation to
39、a call. The index is locally transferred between the mobile station and serving VLR and only has significance within the context of an individual subscription. 1.1.1 Mobile Originated (MO) CUG call handling A CUG subscriber may invoke a CUG by providing the network with a CUG Index at call establish
40、ment. This is termed Explicit CUG invocation. Alternatively, if the subscription allows, some default characteristic of a CUG may be invoked automatically if no CUG information is provided. This is termed Implicit CUG invocation. The network may optionally indicate the use of an implicitly invoked C
41、UG to the calling user. A CUG subscriber may suppress certain CUG attributes by providing suppression indicators during call set-up. The provision of such suppression indicators results in explicit CUG invocation. Any non-CUG related Call Barring supplementary service requirements shall be discharge
42、d before CUG authorisation occurs. 1.1.1.1 MO CUG call handling at the MSC The MSC shall pass any user provided CUG information to the VLR at call establishment. If an Interlock Code, or Interlock code with Outgoing Access indicator, is received from the VLR the MSC shall establish a CUG call with t
43、he destination network using this information. If a CUG Index is received from the VLR the MSC shall pass this to the calling MS. If the CUG call authorisation is unsuccessful the MSC shall pass an indication to the mobile station. 1.1.1.2 MO CUG call handling at the VLR Authorisation of a MO CUG ca
44、ll is performed by the serving VLR. Authorisation is determined by the information provided by the user, the subscription information stored in the VLR and the MO CUG call authorisation function, see Functions clause. ETSI ETSI TS 123 085 V15.0.0 (2018-07)73GPP TS 23.085 version 15.0.0 Release 15Suc
45、cessful authorisation may result in a normal MO call (call without CUG information transferred to the called party) or a MO CUG call (call with CUG information transferred to the called party). When a CUG call is to be made the VLR passes CUG information to the MSC to be used in the call establishme
46、nt. Note, the VLR may optionally pass a CUG Index to the MSC (to be passed to the calling user) to indicate that a CUG has been implicitly invoked. This parameter is not passed to the call destination. In the case of a normal call, no CUG information is passed to the MSC and the call is established
47、normally. On authorisation failure the VLR shall reject the call providing a suitable indication to the serving MSC which is passed to the calling party. 1.1.2 Mobile Terminated (MT) CUG call handling The terminating network is responsible for enforcing the integrity of a CUG related call. The termi
48、nating network must therefore ensure that the calling party attributes and the called party subscription meet CUG restrictions. The terminating network provides the called user with an indication of an incoming CUG call. Non-CUG related Call Barring supplementary service requirements are discharged
49、before CUG authorisations. Call forwarding requirements are discharged after CUG authorisations. 1.1.2.1 MT CUG handling at the GMSC The GMSC shall pass any CUG information contained in an incoming call establishment message to the HLR in the routing enquiry. The GMSC shall continue the call establishment using the CUG information received from the HLR rather than that which was initially received. Note, in rare circumstances the HLR may discard CUG parameters, see the Call Forwarding interaction. If a CUG call fails the GMSC shall return an indication to the origina
