1、STD-ETSI GSM DZ*Lb-ENGL 1373 3400855 01588b4 944 GSM 02.16 November 1996 Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-O10216Q ICs: 33.020 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBIIX COMMUNICATIONS Digital cellul
2、ar telecommunications system; International Mobile station Equipment Identities (IMEI) (GSM 02.16) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRAN
3、CE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariatQetsi.fr 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 foregoing restriction extend to reproduction in all medi
4、a. Q European Telecommunications Standards Institute 1996. All rights reserved. Page 2 GSM 02.16 Version 5.0.0: November 1996 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concernin
5、g its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. Page 3 GSM 02.16 Version 5.0.0: November 1996 Contents Foreword . 5 1 Scope 7 1.1 Normative references 7 1.2 Definitions and abbreviations . 7 2 General 7 3 4 Composition of IMEI 7 Use
6、of the equipment identity register . 8 5 Procedure 8 6 Use of IMEI in case of emergency calls 8 7 MS Software Version Number (SVN) 8 Annex A (normative): IMEI Check Digit computation 9 A.l Representation of IMEI 9 A.2 A.3 Computation of CD for an IMEI . 9 Example of computation 1 0 History 11 Page 4
7、 GSM 02.16 Version 5.0.0: November 1996 Blank page Page 5 GSM 02.16 Version 5.0.0: November 1996 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standar
8、ds Institute (ETSI). This GSM Technical Specification (GTS) defines the principal purpose and use of International Mobile station Equipment Identities (IMEI). The contents of this GTS are subject to continuing work within TC-SMG and may change following formal TC-SMG approval. Should TC-SMG modify t
9、he contents of this GTS it will then be republished by ETSI with an identifying change of release date and an increase in version number as follows: Version 5.x.y where: y the third digit is incremented when editorial only changes have been incorporated in the specification; x the second digit is in
10、cremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. The specification from which this GTS has been derived was originally based on CEPT documentation, hence the presentation of this GTS may not be entirely in accordance with the ETSI rules. STD.ETS1 GSM 0
11、2-Lb-ENGL 1993 3Li00855 OL5b9 42b m Page 6 GSM 02.16 Version 5.0.0: November 1996 Blank page STD-ETSI GSM 02-1b-ENGL 1793 3Li00855 0158670 148 D Page 7 GSM 02.16 Version 5.0.0: November 1996 1 Scope This Global System for Mobile communications Technical Specification (GTS) defines the principal purp
12、ose and use of International Mobile station Equipment Identities (IMEI). GSM 03.03 describes the technical manner of numbering, addressing and identification. 1.1 Normative references This GTS incorporates by dated and undated reference, provisions from other publications. These normative references
13、 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 by amendment or revision. For undated references, the latest edition of
14、the publication referred to applies. I1 1 31 141 GSM O1 .O4 (ETR 350): “Digital cellular telecommunication system (Phase 2+); Abbreviations and acronyms“. GSM 02.1 7 (ETS 300 922): “Digital cellular telecommunications system; Subscriber Identity Modules (SIM) Functional characteristics“. GSM 03.03 (
15、ETS 300 927): “Digital cellular telecommunications system (Phase 2+); Numbering, addressing and identification“. ISO/IEC 7812 (1 989): “Identification cards - Numbering system and registration procedure for issuer identifiers“. 1.2 Definitions and abbreviations In addition to the following, abbrevia
16、tions used in this specification are listed in GSM 01.04. International Mobile Station Equipment Identity (IMEI): An “International Mobile Station Equipment Identity“ is a unique number which shall be allocated to each individual mobile station equipment in the GSM system and shall be unconditionall
17、y implemented by the MS manufacturer. 2 General As described in GSM 02.17, an MS can only be operated if a valid “International Mobile Subscriber Identity“ (IMSI) is present. An IMSI is primarily intended for obtaining information on the use of the GSM network by subscribers for individual charging
18、purposes. Besides the IMSI, the implementation of IMEI is found necessary in order to obtain knowledge about the presence of specific mobile station equipment in the network, disregarding whatever subscribers are making use of these equipments. The main objective is to be able to take measures again
19、st the use of stolen equipment or against equipment of which the use in the GSM system can not or no longer be tolerated for technical reasons. The IMEI is incorporated in an MS module which is contained within the MS equipment and is physically secured. This implementation of each individual module
20、 should be carried out by the manufacturer who is also responsible for ascertaining that each IMEI is unique and keeping detailed records of produced and delivered MS. 3 Composition of IMEI The composition of the IMEI shall be such that each individual mobile station equipment can be separately iden
21、tified. Information is contained in the IMEI by which the GSM PLMN, after requesting it, can immediately decide whether or not to accept calls made by means of this equipment. Page 8 GSM 02.16 Version 5.0.0: November 1996 Secondly, the IMEI shall directly or indirectly contain all information which
22、is necessary for the network operator to make relations through its administrative system to trace the equipment to its origin of production. GSM 03.03 describes the structure of the IMEI in detail. The IMEI (14 digits) is complemented by a check digit. The check digit is not part of the digits tran
23、smitted at IMEI check occasions, as described below. The Check Digit shall avoid manual transmission errors, e.g. when customers register stolen MES at the operators customer care desk. The Check Digit is defined according to the Luhn formula, as defined in annex A. NOTE: The Check Digit is not appl
24、ied to the Software Version Number. 4 Use of the equipment identity register A network operator can make administrative use of the IMEI in the following manner: Three registers are defined, known as “white lists“, “grey lists“ and “black lists“. The use of such lists is at the operators discretion.
25、The white list is composed of all number series of equipment identities that are permitted for use. The black list contains all equipment identities that belong to equipment that need to be barred. Besides the black and white list, administrations have the possibility to use a grey list. Equipments
26、on the grey list are not barred (unless on the black list or not on the white list), but are tracked by the network (for evaluation or other purposes). 5 Procedure It shall be possible to perform the IMEI check at any access attempt, except IMSI detach, and during an established call at any time whe
27、n a dedicated radio resource is available, in accordance with the security policy of the PLMN operator. The network shall terminate any access attempt or ongoing call when receiving any of the answers “black- listed“ (e, on the black list) or “unknown“ equipment (e, not on the white list) from the E
28、IR. An indication of “illegal ME“ shall in these cases be given to the user. Furthermore this is equivalent to an authentication failure hence any call establishment or any location updating is forbidden for the MS, it cannot answer to paging, it is just allowed to perform Emergency Calls. Emergency
29、 calls must never be terminated as a result of the IMEI check procedure. 6 Use of IMEI in case of emergency calls Emergency calls can in some PLMNs be made without having to send the subscriber identity (IMSI) to the network. In this case the misuse of MS equipments after placing invalid emergency c
30、alls can be restrained by using the equipment identity. The network request for the equipment identity is sent to the MS after the emergency call has been set- up. The procedure is the same as for normal call Set-up. 7 MS Software Version Number (SVN) A Software Version Number (SVN) field shall be p
31、rovided. This allows the ME manufacturer to identify different software versions of a given type approved mobile. The SVN is a separate field from the IMEI, although it is associated with the IMEI, and when the network requests the IMEI from the MS, the SVN (if present) is also sent towards the netw
32、ork. It comprises 2 decimal digits. The white list shall use the IMEI, The Black and Grey Lists may also use the SVN. Page 9 GSM 02.16 Version 5.0.0: November 1996 Annex A (normative): IMEI Check Digit computation A.l Representation of IMEI The International Mobile station Equipment Identity and Sof
33、tware Version Number (IMEISV), as defined in GSM 03.03, is a 16 digit decimal number composed of four distinct elements: - - - - a 6 digit Type Approval Code (TAC); a 2 digit Final Assembly Code (FAC); a 6 digit Serial Number (SNR); and a 2 digit Software Version Number (SVN). The IMEISV is formed b
34、y concatenating these four elements as illustrated below: 1 TAC I FAC I SNR I SVN 1 Figure A.l: Composition of the IMEISV The IMEI is complemented by a check digit as defined in section 3. The Luhn Check Digit (CD) is computed on the 14 most significant digits of the IMEISV, that is on the value obt
35、ained by ignoring the SVN digits. The method for computing the Luhn check is defined in Annex B of the International Standard “Identification cards - Numbering system and registration procedure for issuer identifiers“ (ISO/IEC 781 2). In order to specify precisely how the CD is computed for the IMEI
36、, it is necessary to label the individual digits of the IMEISV, excluding the SVN. This is done as follows: The (14 most significant) digits of the IMEISV are labelled D14 D13 . D1, where: - - FACzD8D7 - TAC = D14 D13 . D9 SNR = D6 D5 . D1 (with D9 the least significant digit of TAC); (with D7 the l
37、east significant digit of FAC); and (with D1 the least significant digit of SNR). A.2 Computation of CD for an IMEI Computation of CD from the IMEI proceeds as follows: Step 1 : Double the values of the odd labelled digits D1, D3, D5 . D13 of the IMEI. Step 2: Add together the individual digits of a
38、ll the seven numbers obtained in Step 1, and then add this sum to the sum of all the even labelled digits D2, D4, D6 . D14 of the IMEI. Step 3: If the number obtained in Step 2 ends in O, then set CD to be O. If the number obtained in Step 2 does not end in O, then set CD to be that number subtracte
39、d from the next higher number which does end in O. Page 10 GSM 02.16 Version 5.0.0: November 1996 TAC D14 D13 D12 D11 D10 D9 260531 A.3 Example of computation FAC SNR D8 D7 D6 D5 D4 03 D2 D1 7 9 311383 IMEI (1 4 most significant digits): Step 1: 260531 7 9 311383 x2 x2 x2 x2 x2 x2 x2 12 10 2 18 2 6 6 Step 2: 2+1+2+0+1+0+3+2+7+1+8+3+2+1+6+8+6=53 Step 3: CD =60 - 53 = 7 Page 11 GSM 02.16 Version 5.0.0: November 1996 November 1996 Publication of Version 5.0.0 ISBN 2-7437-1 1 19-1 Dpt lgal : Novembre 1996
