1、 ETSI TS 123 091 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Explicit Call Transfer (ECT) supplementary service; Stage 2 (3GPP TS 23.091 version 14.0.0 Release 14) floppy3TECHNICAL SPECIFICATION GLOBAL SYSTEM FOR M
2、OBILE COMMUNICATIONSRETSI ETSI TS 123 091 V14.0.0 (2017-04)13GPP TS 23.091 version 14.0.0 Release 14Reference RTS/TSGC-0423091ve00 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
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9、red and owned by the GSM Association. ETSI ETSI TS 123 091 V14.0.0 (2017-04)23GPP TS 23.091 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
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12、y be, or may 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 identit
13、ies. 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 document “shall“, “shall not“, “should“, “sh
14、ould 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 except when used in direct citation. ETSI ETSI
15、TS 123 091 V14.0.0 (2017-04)33GPP TS 23.091 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Explicit Call Transfer (ECT
16、) 6g34.1 Functions 6g34.2 SDL diagrams and information flows 8g34.2.1 General description . 8g34.2.2 ECT (both calls answered) 8g34.2.3 ECT (one call answered, the other alerting) . 11g34.3 Interaction with other supplementary services . 14g34.3.1 Line Identification services . 14g34.3.2 Call Forwar
17、ding Unconditional (CFU) . 16g34.3.3 Call Forwarding on mobile subscriber Busy (CFB) . 17g34.3.3.1 Call Forwarding on mobile subscriber Busy due to Network Determined User Busy (NDUB) . 17g34.3.3.2 Call Forwarding on mobile subscriber Busy due to User Determined User Busy (UDUB) . 17g34.3.4 Call For
18、warding on No Reply (CFNRy) . 18g34.3.5 Call Forwarding on mobile subscriber Not Reachable (CFNRc) 18g34.3.6 Call Waiting (CW) 18g34.3.7 Call Hold (HOLD) 18g34.3.8 Multi Party (MPTY) . 18g34.3.9 Closed User Group (CUG) . 18g34.3.10 Advice of Charge (AoC) services . 19g34.3.11 Call Barring services .
19、 19g34.3.12 Explicit Call Transfer (ECT) 19g34.4 Information stored in the HLR . 19g34.5 State transition model . 19g34.6 Transfer of information from the HLR to the VLR 20g34.7 Information stored in the VLR . 20g34.8 Handover 20g3Annex A: Change history 21g3History 22g3ETSI ETSI TS 123 091 V14.0.0
20、(2017-04)43GPP TS 23.091 version 14.0.0 Release 14Foreword This Technical Specification (TS) has been 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 th
21、e 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: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indi
22、cates 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 editorial only changes have been incorporated in the document. ETSI ETSI TS 123 091 V14.0.0
23、(2017-04)53GPP TS 23.091 version 14.0.0 Release 141 Scope The present document gives the stage 2 description of the call transfer supplementary services. Only one call transfer supplementary service has been defined, this is the Explicit Call Transfer (ECT) supplementary service, and is described in
24、 the present document. 2 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 non-specific. - For a spe
25、cific 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 same Release as the prese
26、nt document. 1 3GPP TR 21.905: “3G Vocabulary“. 2 3GPP TS 23.083: “Call Waiting (CW) and Call Hold (HOLD) supplementary services - Stage 2“. 3 3GPP TS 24.008: “Mobile Radio Interface Layer 3 specification; Core Network Protocols - Stage 3“. 4 EN 300 368: “Integrated Services Digital network (ISDN);
27、Explicit Call Transfer (ECT) supplementary service; Functional capabilities and information flows“. 5 EN 300 356-14: “Integrated Services Digital network (ISDN); Signalling System No. 7; ISDN User Part (ISUP) version 3 for the international interface; Part 14: Explicit Call Transfer (ECT) supplement
28、ary service “. 6 3GPP TS 23.011: “Technical realization of Supplementary Services”. 7 3GPP TS 23.018: “Basic Call Handling”. 3 Definitions and abbreviations 3.1 Definitions First call: One of the subscriber A calls (answered). Notification Indicator (NI): Indicates to each remote party in which stat
29、e of the other remote party ECT was performed (active, alerting). Redirection Number (Rdn): Includes the presentation indicator and the directory number of the other remote party. Second call: The other subscriber A call (answered or alerting). Subscriber A (PARTY A): The served mobile subscriber -
30、the one who has subscribed to, and invokes the ECT Supplementary Service. Subscriber B (PARTY B): The other party in the subscriber A first call. Subscriber C (PARTY C): The other party in the subscriber A second call. Subscriber D (PARTY D): The forwarded-to party when the call is forwarded by the
31、subscriber C. Transferred call: The resulting call after successful explicit call transfer between B and C. ETSI ETSI TS 123 091 V14.0.0 (2017-04)63GPP TS 23.091 version 14.0.0 Release 143.2 Abbreviations In addition to those below, abbreviations used in the present document are listed in 3GPP TR 21
32、.905 1. ECT: Explicit Call Transfer supplementary service LI: Line Identity NI: Notification Indicator Rdn: Redirection numberRdnB: Redirection number of party B RdnD: Redirection number of party D 4 Explicit Call Transfer (ECT) 4.1 Functions The following function has been identified for the explic
33、it call transfer service: MAF027 Explicit Call Transfer related authorizations examination The ability of a PLMN component to determine the authorizations relating to explicit call transfer. See figure 1. Location: VLR ETSI ETSI TS 123 091 V14.0.0 (2017-04)73GPP TS 23.091 version 14.0.0 Release 14Fi
34、gure 1: Explicit Call Transfer related authorizations examination (VLR) Process in the VLR to checkif ECT is provisioned.Process MAF027 391_1(1)Signals to/from the left areto/from the MSC.IdleCheck ECTsubscriptionECTprovisionedSS-CSIprovisioned?ECT markedin CSI?Indicator:=ECT_availableProcessECTIdle
35、Indicator:=ECT_available+ SS-CSIIndicator:=ECT_not_availableYesYesNoYesNoNoETSI ETSI TS 123 091 V14.0.0 (2017-04)83GPP TS 23.091 version 14.0.0 Release 144.2 SDL diagrams and information flows 4.2.1 General description The procedures Handle_ECT_Active and Handle_ECT_Alerting show the behaviour of th
36、e service as perceived by the served mobile subscriber and by any of the other parties involved in the transfer. These procedures and the macro Check_ECT show the actions to be taken by the network and the information provided by the network to the users. The following states for the invocation of t
37、he ECT supplementary service are defined: a) First Call (Active, Held), Second Call (Active, Idle); b) First Call (Active, Held), Second Call (Call Delivered, Idle). NOTE: The call state “call delivered“ means that an ALERTING message has been sent to the MS, but no ANSWER Message (ANM) has been rec
38、eived. In the information flows it is assumed that the served subscriber is a mobile subscriber and that the other parties are mobile or fixed subscribers. Party A is the subscriber controlling the Explicit Call Transfer Call (served mobile subscriber). Party B is the first remote party called. Part
39、y C is the second remote party called. The served party is disconnected by the generic disconnect/release procedure after a successful transfer request. The connection of the remote parties in a new call (transferred call) is located in the served subscribers MSC. The information flows in figures 4
40、and 7 show the unsuccessful case (i.e. the check in the VLR or in the MSC fails). The information flows in figures 5 and 8 show the successful case. 4.2.2 ECT (both calls answered) The SDL for the procedure Handle_ECT_Active (Explicit Call Transfer - both calls have been answered) is shown in figure
41、 2. The checks of whether Explicit Call Transfer is barred or not are shown in figure 3. The corresponding information flows are given in figure 4 and figure 5. ETSI ETSI TS 123 091 V14.0.0 (2017-04)93GPP TS 23.091 version 14.0.0 Release 14Figure 2: Procedure Handle_ECT_Active Procedure in the origi
42、nating MSC to handle an Explicit Call Transfer when the first call leg (A-B) is connected and on hold and the othercall leg (A-C) is connected and active.Procedure Handle_ECT_Active ECT_Ac(1)Signals to/from the left areto/from the MS;signals to/from the right areto/from all/any remote partiesunless
43、stated otherwise.Check_ECTConnect bothcallsECTrejectTo the held partyRetrievenotificationResult:=FailTransfernotificationECT ackSS-CSIpresent?SS InvocationnotifyTo gsmSCFFor call legsA-B - receives and accepts a call from subscriber C (by putting B on Hold), table 4 applies to the information suppli
44、ed to subscriber B. ETSI ETSI TS 123 091 V14.0.0 (2017-04)153GPP TS 23.091 version 14.0.0 Release 14Table 1: Mobile subscriber A was calling subscriber B, puts B on hold and calls subscriber C Call states COLR indication received from Information provided to C subscribers Bs network A-B Active Indic
45、ated “allowed“ At time of transfer: A-C Active / Alerting NI: “call transferred, active“ Rdn: PI = allowed, LI of B A-B Active Indicated “restricted“ At time of transfer: A-C Active / Alerting NI: “call transferred, active“ Rdn: PI = restricted (note 1) A-B Active No indication received At time of t
46、ransfer: A-C Active / Alerting (e.g. interworking) NI: “call transferred, active“ Rdn: PI = not available Table 2: Mobile subscriber A was called by subscriber B, puts B on hold and calls subscriber C Call states CLIR indication received from Information provided to C subscribers Bs network A-B Acti
47、ve Indicated “allowed“ At time of transfer: A-C Active / Alerting NI: “call transferred, active“ Rdn: PI = allowed, LI of B A-B Active Indicated “restricted“ At time of transfer: A-C Active / Alerting NI: “call transferred, active“ Rdn: PI = restricted (note 1) A-B Active No indication received At t
48、ime of transfer: A-C Active / Alerting (e.g. interworking) NI: “call transferred, active“ Rdn: PI = not available NOTE 1: If the subscriber C has CLIP Override Category then the following information is carried in the Redirection number: PI = restricted, LI of B. ETSI ETSI TS 123 091 V14.0.0 (2017-0
49、4)163GPP TS 23.091 version 14.0.0 Release 14Table 3: Mobile subscriber A puts the call to B on hold and calls subscriber C Call states COLR indication received from Information provided to B subscribers Cs network A-B Active Indicated “allowed“ At time of transfer: A-C Active NI: “call transferred, active“ Rdn: PI = allowed, LI of C A-B Active Indicated “restricted“ At time of transfer: A-C Active NI: “call transferred, active“ Rdn: PI = restricted (note 2) A-B Active No indication received At time of transfer: A-C Active (e.g. interworking) NI: “call tra
