1、 ETSI TR 141 031 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Fraud Information Gathering System (FIGS); Service requirements; Stage 0 (3GPP TR 41.031 version 14.0.0 Release 14) TECHNICAL REPORT GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TR 141 031 V14.0.0 (2
2、017-04)13GPP TR 41.031 version 14.0.0 Release 14Reference RTR/TSGS-0341031ve00 Keywords GSM,SECURITY 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 Sou
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9、 registered and owned by the GSM Association. ETSI ETSI TR 141 031 V14.0.0 (2017-04)23GPP TR 41.031 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
10、, if any, is publicly 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 avai
11、lable on the ETSI Web 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 ar
12、e, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced 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 identitie
13、s. 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 “should“, “should not“, “may“, “need
14、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 TR 141 031 V14.0.0 (2017
15、-04)33GPP TR 41.031 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 Normative references . 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Fraud Information Gathering System over
16、view . 6g35 The need for fraud detection systems and controls 6g35.1 Outline of present situation 6g35.2 General Principles 7g35.3 Capabilities . 7g35.4 Service conditions 7g35.5 Information Delivery Time. 7g35.6 Subscriber Data Volumes . 8g36 Interface between HPLMN and FDS . 8g37 Security of the s
17、ystem 8g3Annex A: Change History . 9g3History 10g3ETSI ETSI TR 141 031 V14.0.0 (2017-04)43GPP TR 41.031 version 14.0.0 Release 14Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work withi
18、n 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: 1 presented to TSG fo
19、r 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 editorial only changes have
20、 been incorporated in the document. ETSI ETSI TR 141 031 V14.0.0 (2017-04)53GPP TR 41.031 version 14.0.0 Release 141 Scope This Technical Report describes the requirements (at a stage 0 level) of the Fraud Information Gathering System (FIGS). FIGS provides the means for the HPLMN to monitor a define
21、d set of subscriber activities. The aim is to enable service providers/network operators to use FIGS, and service limitation controls such as Operator Determined Barring (ODB) and Immediate Service Termination (IST), to limit their financial exposure to large unpaid bills produced on subscriber acco
22、unts whilst the subscriber is roaming outside their HPLMN. HPLMNs may also choose to collect information on subscriber activities whilst their subscribers are within the HPLMN. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisi
23、ons of the present document. - 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 referen
24、ce 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 present document. 1 GSM 01.04: “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. 2 GSM 02.33: “Digital cel
25、lular telecommunications system (Phase 2+); Lawful Interception - stage 1“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of this report the following definitions apply: monitored activities: subscriber activities that must be reported to the HPLMN. These can be call related event
26、s (e.g. call-set-up, call termination) or the invocation of call related and call independent supplementary services (e.g. Call Hold, Call Waiting, Call Transfer, Call Forwarding, Unstructured Supplementary Service Data). Home Network: The home PLMN including non-GSM elements such as the Fraud Detec
27、tion System (FDS), customer service systems and billing. 3.2 Abbreviations Abbreviations used in this report are listed in GSM 01.04. For the purposes of this report the following abbreviations apply: FIGS Fraud Information Gathering System FDS Fraud Detection System This is not necessarily an autom
28、atic system but may be one that requires human intervention. IST Immediate Service Termination ETSI ETSI TR 141 031 V14.0.0 (2017-04)63GPP TR 41.031 version 14.0.0 Release 144 Fraud Information Gathering System overview A number of proposals have been suggested for a Subscriber Supervisory System (S
29、SS) for which specifications were produced from May 1995 through to December 1996. Following joint review between SMG1 and SMG10, it was agreed that the system should be re-specified to take account of network operator and manufacturer needs for a Fraud Information Gathering System (FIGS). This repo
30、rt provides an outline of such a system. This report describes a method by which the Home Network can be provided with data on the activities of its subscribers in a VPLMN. The Home Network can make inferences about what the subscriber is doing and then take decisions on what the subscriber should b
31、e allowed to do. This report does not address any Fraud Detection systems or the intelligence that is used to advise the HPLMN on the controls to be applied to a subscriber. Figure 1 shows the flow of messages between the HPLMN and the VPLMN and between the HPLMN and the FDS. FraudDetectionSystemHPL
32、MNFIGS SetFIGS DataVPLMN1VPLMN3FIGS SetFIGS DataVPLMN2Figure 1: Flow of messages between the HPLMN and the VPLMN and between the HPLMN and the FDS 5 The need for fraud detection systems and controls 5.1 Outline of present situation Modern telecommunications networks, particularly mobile networks pro
33、vide the potential for fraudsters to make use of telecommunication services (Voice, Data, Fax etc.) without the intent to pay. A number of different scenarios are exploited and it is up to the network operator or service provider to detect misuse where it occurs and to stop it at the earliest possib
34、le opportunity. The scale of frauds can be many thousand of ECU per day on a single account when International or Premium rate numbers are called. The most common types of fraud that effect networks like GSM are related to the ability to sell calls at below market price using stolen air-time/equipme
35、nt where the user of the equipment does not intend to pay the network operator or service provider. Fraudulent subscribers often avoid payment by obtaining a handset and a subscription to a GSM network by fraudulently giving details and justifications to the network operators/service provider. If th
36、ere are not good controls within the network the subscriber can make a large volume of calls to expensive destinations and accumulate a large bill. ETSI ETSI TR 141 031 V14.0.0 (2017-04)73GPP TR 41.031 version 14.0.0 Release 14Roaming, in co-ordination with advanced services such as call transfer an
37、d multi-party calls, complicates the issue further, requiring control of the customer within the VPLMN. Many simultaneous calls can be set up and large bills accumulated in a short time. At present no system exists within the GSM network architecture for speedily transferring information on subscrib
38、er activity from the VPLMN to the HPLMN. In the future, SIMs may roam to non-GSM networks, further broadening the area over which control is required. It is recognised that if FIGS is implemented in non-GSM networks that suitable inter-working units will be required to translate commands and informa
39、tion. 5.2 General Principles The PLMN network should be able to supply relevant information to the HPLMN network so it can make a decision on whether to terminate a call or to change the Operator Determined Barring (ODB) configuration for the specific subscriber. This decision will be carried out by
40、 the HPLMN or service provider. It is recognised that there is a limit to the type and volume of information that can be transferred between the VPLMN and the HPLMN. Therefore the requirement for the system is that distilled and standardised information must be supplied between the VPLMN and HPLMN.
41、5.3 Capabilities The following minimum capabilities are required. See figure 1. Within the Home Network: - to mark a subscriber, defined by the IMSI or MSISDN, as being under FIGS control (“FIG Set“); - to receive from the VPLMN the data described below; - to remove the monitoring of a subscribers a
42、ctivities (“FIGS Unset“). Within the VPLMN: - to transmit to the HPLMN information (FIGS Data): - at the start of a call; - at the end of a call; - during a call for long calls or at the mid-call invocation of supplementary services. 5.4 Service conditions The following service conditions shall appl
43、y: - FIGS shall not modify the VPLMNs service; - FIGS should not alter any standard GSM functionality seen by the customer or effect the service quality; - If the VPLMN network does not have the resources to support a FIGS Set command it shall respond accordingly to the HPLMN. 5.5 Information Delive
44、ry Time The need for up to date information is a critical part of any fraud information system. The sooner data is transferred to the HPLMN, the sooner fraud can be stopped. Therefore the proscribed information shall be transferred from the VPLMN to the HPLMN within two minutes of the occurrence of
45、a FIGS-monitored event The information shall preferably be transferred from the VPLMN to the HPLMN over existing communication links (e.g. SS7 signalling links). ETSI ETSI TR 141 031 V14.0.0 (2017-04)83GPP TR 41.031 version 14.0.0 Release 145.6 Subscriber Data Volumes If the support of FIGS is causi
46、ng overload within the VPLMN the FIGS system shall not permit the marking of new subscribers. The VPLMN should therefore handle up to a realistic limit any requests for marking of subscribers and be able to support the associated data transfer. The setting of this limit is outside the scope of this
47、report. Each VPLMN should limit the number of subscribers that each HPLMN may request to be monitored using FIGS. Otherwise an HPLMN may take more than its “fair share” of the FIGS processing capability of a VPLMN. A mechanism shall be required whereby a VPLMN can charge an HPLMN for the bulk data t
48、ransfer made to that HPLMN. 6 Interface between HPLMN and FDS The interface between the home network and the networks fraud detection and processing systems shall be through a specific interface. This will be used to present information to the fraud detection systems. The contents of messages sent o
49、n this interface shall be specified but not the transfer mechanism. This is in line with the approach used for the X-interface as specified in GSM 02.33. The FDS will indicate to the HPLMN subscribers that should be subject to FIGS monitoring. This information will update the HPLMN HLR. Information, as listed in subclause 5.3 gathered from the VPLMN will be transferred to the FDS system. Following processing of this information, the FDS system can take no action or can advise the home network to do one of the following: a) update ODB categories; b) instigate an Immedi
