ETSI TS 123 085-2017 Digital cellular telecommunications system (Phase 2+) (GSM) Universal Mobile Telecommunications System (UMTS) Closed User Group (CUG) supplementary service Sta.pdf

1、 ETSI TS 123 085 V14.0.0 (2017-04) 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 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR MOBILE COMMUN

2、ICATIONSRETSI ETSI TS 123 085 V14.0.0 (2017-04)13GPP TS 23.085 version 14.0.0 Release 14Reference RTS/TSGC-0423085ve00 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、d by the GSM Association. ETSI ETSI TS 123 085 V14.0.0 (2017-04)23GPP TS 23.085 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicl

10、y available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI We

11、b server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may

12、 become, essential to the present document. Foreword This Technical Specification (TS) has been produced by the ETSI 3rdGeneration Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These s

13、hould 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 document “shall“, “shall not“, “should“, “should not“, “

14、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 except when used in direct citation. ETSI ETSI TS 123 085 V

15、14.0.0 (2017-04)33GPP TS 23.085 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g30 Scope 5g30.1 References 5g30.2 Definitions 5g30.3 Abbreviations . 6g31 Closed user group (CUG) . 6g31.1 Handling of Closed User Group . 6g31.1.1

16、Mobile Originated (MO) CUG call handling 6g31.1.1.1 MO CUG call handling at the MSC 7g31.1.1.2 MO CUG call handling at the VLR 7g31.1.2 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 functio

17、ns at the MSC . 8g31.1.2.4 MT CUG handling functions at the VLR 8g31.1.3 CUG subscriber roaming requirements. 8g31.1.4 CUG interworking requirements . 9g31.1.4.1 Non-CUG GSM PLMNs . 9g31.1.4.2 Interworking to Non-CUG networks . 9g31.1.5 Supplementary service interactions 9g31.1.5.1 Interaction with

18、Call Forwarding 9g31.1.5.2 Interaction with call waiting 9g31.1.5.3 Interaction with Anonymous Call Rejection . 10g31.2 Functions and information flows 10g31.2.1 Functions 10g31.2.2 Information flows . 12g31.3 Information stored in the HLR . 18g31.4 Information stored in the VLR . 19g31.5 Handover 1

19、9g31.6 Cross phase compatibility 20g31.6.1 MSC, VLR only support phase 1 20g31.6.2 GMSC only supports phase 1 . 20g3Annex A (informative): Change history . 21g3History 22g3ETSI ETSI TS 123 085 V14.0.0 (2017-04)43GPP TS 23.085 version 14.0.0 Release 14Foreword This Technical Specification (TS) has be

20、en produced by ETSI 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 identi

21、fying 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

22、 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 123 085 V14.0.0 (2017-04)53GPP TS 23.085 version 14.0.0 Release 140 Scope The present document gives the stage 2 de

23、scription of the closed user group supplementary service. The community of interest supplementary service defined 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 docume

24、nt. - 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 (in

25、cluding 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 22.085: “Closed User Group (CUG) Supplementary Services; Stage 1“. 3 3GPP TS 23.

26、088: “Call Barring (CB) Supplementary Service; Stage 2“. 0.2 Definitions CUG terminology defined in 3GPP TS 22. 085 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 CU

27、G related call is guarantied. CUG calls are rejected if they do not meet the criteria of these checks. CUG call: CUG 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 outgo

28、ing call, or to indicate an incoming CUG call. Indices are passed between the user and the network and have significance 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 t

29、o the destination in a CUG call to identify the CUG which has been invoked. CUG Related Call Barring: CUG related 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 Invoca

30、tion: Explicit CUG invocation is where a calling user attempts to invoke a CUG by passing CUG information to the network 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 cal

31、l request. Normal Call: Normal call in the context of this CUG TS is a call established from a CUG subscriber where 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 i

32、n a CUG call to indicate that the calling user has subscribed to the Outgoing Access inter-CUG accessibility subscription option. ETSI ETSI TS 123 085 V14.0.0 (2017-04)63GPP TS 23.085 version 14.0.0 Release 140.3 Abbreviations In addition to those listed below abbreviations used in the present docum

33、ent are listed in 3GPP TR 21.905 1. For the purposes of the present document, the following abbreviations apply: BS 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.

34、 ICB Incoming Calls Barred within the CUG OA Outgoing Access OCB Outgoing Calls Barred within the CUG Pref CUG Preferential 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 clau

35、se. The Functions subclause 1.2.1 describes the CUG service logic and how CUG information is used. The flow of CUG 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

36、 the integrity of any CUG which it handles. It is not however mandatory for a PLMN to support the CUG supplementary 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 id

37、entifies a CUG by a CUG Index. A CUG Index is used to select or indicate the use of a specific CUG in relation to 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 (M

38、O) CUG call handling A CUG subscriber may invoke a CUG by providing the network with a CUG Index at call establishment. 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 provid

39、ed. This is termed Implicit CUG invocation. The network may optionally indicate the use of an implicitly invoked CUG 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

40、in explicit CUG invocation. Any non-CUG related Call Barring supplementary service requirements shall be discharged before CUG authorisation occurs. ETSI ETSI TS 123 085 V14.0.0 (2017-04)73GPP TS 23.085 version 14.0.0 Release 141.1.1.1 MO CUG call handling at the MSC The MSC shall pass any user prov

41、ided 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 the destination network using this information. If a CUG Index is received from the VLR the MSC shall pass t

42、his 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 call is performed by the serving VLR. Authorisation is determined by the information provided by the user, th

43、e subscription information stored in the VLR and the MO CUG call authorisation function, see Functions clause. Successful 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

44、party). When a CUG call is to be made the VLR passes CUG information to the MSC to be used in the call establishment. 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 ca

45、ll destination. In the case of a normal call, no CUG information is passed to the MSC and the call is established 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

46、 call handling The terminating network is responsible for enforcing the integrity of a CUG related call. The terminating 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 i

47、ndication of an incoming CUG call. Non-CUG related Call Barring supplementary service requirements are discharged 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

48、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 Forward

49、ing interaction. If a CUG call fails the GMSC shall return an indication to the originating network. 1.1.2.2 MT CUG handling functions at the HLR Authorisation of a MT CUG call is performed at the called parties HLR. Authorisation is determined by the information received in the call establishment signalling, the called party subscription information stored in the HLR, and the MT CUG call authorisation function, see Functions clause. On successful authorisation, the HLR supplies the GMSC with CUG information for the continuation of the call establishment. On unsucce