1、STD-ETSI GSM 02-79-ENGL LVVV 3400655 0390423 008 T GSM 1 ECHNICAL n 3 PECIFICATION GSM 02.79 March 1999 Version 5.2.0 Source: SMG Reference: RGTS/SMG-O10279QR2 ICs: 33.020 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE CO
2、MMUNICATIONS Digital cellular telecommunications system (Phase 2+); Support of Optimal Routeing (SOR); Service definition (Stage 1) (GSM 02.79 version 5.2.0 Release 1996) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipoiis CEDEX - FRANCE Off
3、ice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Internet: secretariat betsi.fr - http:/www.etsi.org Tel.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the foregoin
4、g restriction extend to reproduction in all media. O European Telecommunications Standards Institute 1999. All rights reserved. STD-ETSI GSM 02.79-ENGL 1999 3400855 0390422 T44 H Page 2 GSM 02.79 Version 5.2.0 Release 1996: March 1999 Whilst every care has been taken in the preparation and publicati
5、on of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Standards Making Support Dept.“ at the address shown on the title page. Page 3 GSM 02.79 Version 5.2.0 Release 1996: March 1999 Contents Intellectual Pro
6、perty Rights 5 Foreword . 5 1 2 3 4 5 6 7 8 Scope 7 Normative references 7 Definitions and abbreviations 7 Description of Optimal Routing . 8 Functional requirements 8 5.1 General 8 5.2 Normal operation . 8 A is a fixed Subscriber or a mobile subscriber who may not benefit from OR . 9 A is a mobile
7、subscriber who may benefit from OR 10 5.2.2.1 5.2.2.2 Call scenarios handled in OR Phase 1 11 Exceptional procedures or unsuccessful outcome 15 5.3.1 5.3.2 Non-support of SOR in the HPLMN of the B subscriber . 15 5.3.3 Non support of SOR in the VPLMN of the B subscriber 15 5.3.4 Calls to special mob
8、ile network numbers 15 5.2.1 5.2.2 Description of the call routing 10 Non-support of SOR in the VPLMN of the caller . 15 5.3 Interactions of Optimal Routing with Supplementary Services 15 6.1 Call Forwarding 15 6.2 Call Bamng 16 6.3 Call Transfer 16 6.4 Call Deflection 16 6.5 Advice of Charge . 16 I
9、nteractions of Optimal Routing with Operator Determined Barring (ODB) . 16 Interactions of Optimal Routing with CAMEL 16 Annex A (informative): Change Request History 17 History 18 STD-ETSI GSM 02-79-ENGL 3999 M 3400855 0390424 817 W Page 5 GSM 02.79 Version 5.2.0 Release 1996: March 1999 Intellectu
10、al 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 publicly available for ETSI members and non- members, and can be found in SR 000 314: “lnellectual Propew Rights (IPRs); E
11、ssentiaA orpotentiallly Essential, IPRs notified to ETSI in respect of ETSI standards: which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:lhivww.etsi.org/ipr). Pursuant to the ETSI IPR Policy, no investigation, including IPR searche
12、s, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Global System for Mobile communications Technical Sp
13、ecification (GTS) was produced by the Special Mobile Group (SMG) Technical Committee of the European Telecommunications Standards Institute (ETSI). This GTS specifies the stage 1 description of the first phase of Support of Optimal Routing (SOR) within the digital cellular telecommunications system.
14、 GTS are produced by TC-SMG to enable the GSM Phase 2+ specifications to become publicly available, prior to submission for the formal ETSI standards approval procedure to become European Telecommunications Standards (ETS). This ensures the earliest possible access to GSM Phase 2+ specifications for
15、 all Manufacturers, Network operators and implementors of the Global System for Mobile communications. The contents of this GTS are subject to continuing work within SMG and may change following formal SMG approval. Should TC-SMG modify the contents of this GTS it will then be republished by ETSI wi
16、th an identiying change of release date and an increase in version number as follows: Version 5.x.y where: 5 indicates Release 1996 of GSM Phase 2+ x the second digit is incremented for all changes of substance, .e. technical enhancements, corrections, updates, etc. the third digit is incremented wh
17、en editorial only changes have been incorporated in the specification. y Previous page is blank STD=ETSI GSM 02-79-ENGL 1999 3400855 0390425 753 W Page 7 GSM 02.79 Version 5.2.0 Release 1996: March 1999 1 Scope This Stage 1 description of the first phase of Support of Optimal Routing (SOR): - - - Th
18、is specification does not address the following: - compiles the basic service requirements for SOR; describes the interactions for Supplementary Services (SS) in order to cater for SOR; refers to modifications to network features required by SOR. There is no need for optimisation of the routing of c
19、alls originally directed to a fixed network subscriber, because the physical address of a fixed network terminating line cannot differ from its logical address. SOR in non-GSM mobile networks is not a subject of this GTS, but might be possible by bilateral arrangement between GSM network operators a
20、nd those non-GSM mobile network operators. - The purpose of SOR is to reduce the number of unnecessary inter-PLMN call legs. The first phase of SOR applies to: - and optionally; - OR for the benefit of the B party .e. Mobile terminated calls with late call forwarding to the home or visited country (
21、scenarios 1 and 2), OR for the benefit of the A party, e.g. Mobile to mobile calls where both mobile subscribers are in the same country (scenarios 3 to 10). The complete set of scenarios included in the phase 1 of OR is presented in the paragraph for normal procedures. All other scenarios are exclu
22、ded from Phase 1 of OR. Note that Optimal Routing is applicable to national roaming situations, that is to calls directed to a mobile subscriber roaming in her home country, but registered in a PLMN different from her HPLMN. All further call scenarios, including multiple call forwarding, are left to
23、 subsequent phases of SOR. Subsequent phases of SOR shall be backwards compatible with this first phase. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of the present document. This GTS incorporates by dated and undated
24、reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this GTS only when incorporated in it
25、 by amendment or revision. For undated references the latest edition of the publication referred to applies. GSM O1 .O4 (ETR 350): “Digital cellular telecommunication system (Phase 2+); Abbreviations and acronyms“. Dl 3 Definitions and abbreviations Administrative PLMN: The complete set of all funct
26、ional entities normally regarded as a single PLMN. Basic OR : Routeing of a call by the direct route when no forwarding occurs. Direct route: A call uses the direct route if it is routed from the serving network of the original calling party to the sewing network of the ultimate called party without
27、 any intermediate PLMN. HPLMN route: A call uses the HPLMN route if the destination is deduced from the MSISDN of the called party. This forces the call to be routed via the HPLMN of the called party. Previous page is blaiik STD-ETSI GSM 02-77-ENGL 1777 3400855 037042b b7T 9 Page 8 GSM 02.79 Version
28、 5.2.0 Release 1996: March 1999 HPLMN leg: The HPLMN leg is that part of the HPLMN route from the IPLMN to the HPLMN of the called party. IPLMN: An IPLMN is a PLMN which interrogates the HPLMN of a called party in order to determine the whereabouts of that party. Early Call Forwarding : Early Call F
29、orwarding is Call Forwarding performed from the IPLMN before the call has been extended to the VPLMN of the forwarding subscriber (.e. Call Forwarding Unconditional and Conditional Call Forwarding on Not Reachable known at the IPLMN before extension of the call) Functional PLMN: For the purposes of
30、this description the Administrative PLMN is divided into functional PLMNs that represent different aspects of the Optimal Routeing functionality. Late Call Forwarding: Late Call Forwarding is Call Forwarding performed after the call has been extended to the VPLMN of the forwarding subscriber (.e. Co
31、nditional Call Forwarding on Busy, Conditional Call Forwarding on No Reply and Conditional Call Forwarding on Not Reachable detected in the VPLMN of the forwarding subscriber). Late Call Forwarding may be invoked in the IPLMN or in the VPLMN of the forwarding subscriber. Special mobile network numbe
32、r: For the purposes of this description special mobile network numbers are numbers belonging logically to a PLMN but not to a mobile subscriber. Examples are the customer service number or value added service numbers. Abbreviations are given in GSM O1 .O4 (ETR 350) l 4 Description of Optimal Routing
33、 Support of Optimal Routing (SOR) is a network feature which enables the calls directed to a mobile subscriber to be routed directly to the mobile subscribers actual location, or to her forwarded40 destination (instead of via the HPLMN or in the case of Late Call Forwarding via the VPLMN). The IPLMN
34、 handling the call shall decide whether or not to optimise the routing of the call taking into , account information provided by the called mobile subscribers HPLMN. For given subscribers, as a network option, the HPLMN may permit or deny OR on a per call basis. References to the provision of Data P
35、rivacy supplementary services in case of OR have been deleted from GSM MOU reference documents. NOTE: 5 Functional requirements 5.1 General SOR shall be provided for all circuit switched Telecommunication Services, except emergency calls, Dedicated PAD and Dedicated Packet Access (GPRS is for furthe
36、r study). The network feature shall be applied automatically for all calls except for those calls for which the HPLMN of the called party denies the optimal routing. 5.2 Normal operation In the first phase of SOR, the routes of calls will be optimised for the cases of OR being performed within a cou
37、ntry or towards the country where the call would have been routed normally. Under all other circumstances, the GSM basic call routing is applied: - - If the IPLMN detects that basic OR cannot be applied, the IPLMN routes the call according to the dialled number. If the IPLMN detects that OR for Late
38、 Call Forwarding cannot be applied, the Call Forwarding will be performed in the VPLMN of the forwarding subscriber. STDaETSI GSM 02.79-ENGL 1999 W 3400855 0390427 5Sb Page 9 GSM 02.79 Version 5.2.0 Release 1996: March 1999 If the serving network of the ultimate destination supports SOR, the serving
39、 network of the caller shall be able to indicate to the network visited by the ultimate destination that the call has been optimally routed and to indicate the originating PLMN of the optimally routed leg. The complete set of scenarios included in phase 1 of SOR is described below. The notation used
40、 for the scenario diagrams is defined in figure 1. . * Traffic route “.“.“_.I Traffic route of basic GSM routeing, not used for OR 3 - Call Attempt Functional PLM N (e.g. IPLM N, VPLM N-8) Output of call record informatlon Interrogatlon Adminlstratlve PLMN, which may include two functional PLM Ns Fi
41、gure 1: Notation used in scenario diagrams If one of those scenarios occurs, SOR shall be invoked. The assumptions taken are the following : - - If C is a mobile subscriber, the location of C taken into account in the following paragraphs is the location A subscriber A sets up a call to a mobile sub
42、scriber B, who may have forwarded her calls to a subscriber C. The C subscriber may be either a fixed subscriber or a mobile subscriber. of HPLMN-C. 5.2.1 A is a fixed subscriber or a mobile subscriber who may not benefit from OR As the originating network does not have the ability to interrogate th
43、e HPLMN of the B subscriber, the normal GSM call handling is applied. Once the HPLMN of the B subscriber has the control of the call, the call may be optimised in the case of a forwarded call towards a party located in the Home Country of the B subscriber or in the country visited by the B subscribe
44、r. NOTE: - A may be in any country. - In the two following cases, the IPLMN is HPLMN-B. STD.ETSI GSM 02-79-ENGL 1977 3400855 0390428 462 Page 10 GSM 02.79 Version 5.2.0 Release 1996: March 1999 Country Y Country Z Country X HPLM N-B $9 ecoid OR flag , Scenario 1 : OR for Late Call Forwarding, C is i
45、n the same country as HPLMN-B NOTE: Call records shown in the figure are only for information Country X A- - Country Y Country Z a HPLY N-B VPLM N-B orwarding R flag Scenario 2: OR for Late Call Forwarding, C is in the same country as VPLMN-B NOTE: Call records shown in the figure are only for infor
46、mation 5.2.2 A is a mobile subscriber who may benefit from OR 5.2.2.1 Description of the call routing If A sets up a call to B, then the originating PLMN shall interrogate the HPLMN of the mobile subscriber in order to know how to route the call. B If B is registered in the same country as A, then t
47、he call shall be routed directly to B as described below. If B has activated a Call Forward to a destination located in the Home Country of B or in the country where A is registered and this leads to the invocation of Early Call Forwarding, then the call shall be routed directly from A to the forwar
48、ded-to-pa. In any other cases, the call shall be routed to the mobile subscriber B via HPLMN(B). If the call cannot be completed, the originating PLMN shall receive an indication of the reason of the failure of the call completion. STD-ETSI GSM 02-79-ENGL 3999 3400855 0390429 3T m Page 11 GSM 02.79
49、Version 5.2.0 Release 1996: March 1999 Thereafter, if the mobile subscriber B has activated a Conditional Call Forward to a destination located in her Home Country or to a destination in the country where A is registered and this leads to the invocation of Late Call Forwarding, then the originating PLMN shall route the call directly to the forwarded-to-party. The remaining leg of the call from the intermediate point to the ultimate destination may be optimally routed. 5.2.2.2 Call scenarios handled in OR Phase 1 In the following scenarios, the IPLMN is VPLMN
