1、GSM GSM 03.1 2 November 1996 Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-O30312Q ICs: 33.020 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMRlUNICATIONS Digital cellular telecommunications system; Location regi
2、stration procedures (GSM 03.12) ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretarat - Internet: secretari
3、atetsi.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 media. 0 European Telecommunications Standards Institute 1996. All rights
4、 reserved. Page 2 GSM 03.12 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 concerning its accuracy, please write to “ETSI Editing and Committee Support D
5、ept.“ at the address shown on the title page. STD-ETSI GSM 01.12-ENGL 177b m 3400855 0359305 927 m Page 3 GSM 03.12 version 5.0.0: November 1996 Contents Foreword . 5 1 Scope 7 1.1 Normative references 7 1.2 Abbreviations . 7 2 Definitions 8 2.1 Location registration . 8 2.2 Location area and MSC ar
6、ea . 8 2.3 Location area identification 8 2.4 IMSI detach/attach operation . 8 2.4.1 Explicit IMSI detach/attach 8 2.4.2 Implicit IMSI detach . 8 Use of the term mobile station (MS) in this GTS . 8 2.5 3 Procedures in the network related to location updating 9 3.1 Procedures in the MSC related to Lo
7、cation Updating 9 3.2 Procedures in the BSC related to Location Updating 9 3.3 Normal location updating and IMSI detach/attach operation . 9 3.4 IMSI enquiry procedure 9 3.5 Information transfer between visitor and home location registers . 9 3.5.1 Procedures for location registration . 9 3.5.1.1 Lo
8、cation updating procedure . 9 3.5.1.2 Downloading of subscriber parameters to the VLR . 9 3.5.1.3 3.5.1.4 Subscriber parameter request procedure 10 3.5.1.5 Mobile subscriber purging procedure 10 Location cancellation procedure 9 3.5.1.6 Recovery procedures . 10 4 Authentication 10 History 11 STD-ETS
9、I GSM 03.LZ-ENGL L77b 3900855 0157LOb 8b3 E , Page 4 GSM 03.12 version 5.0.0: November 1996 Blank Page STD-ETSI GSM 03.1Z-ENGL L99b 3400855 0159107 7TT Page 5 GSM 03.12 version 5.0.0: November 1996 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced
10、by the Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI). This GTS defines the location registration procedures within the digital cellular telecommunications system. GTS are produced by TC-SMG to enable the GSM Phase 2+ specifications
11、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 all Manufacturers, Network operators and implementors of the Global S
12、ystem for Mobile communications. 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 the contents of this GTS it will then be republished by ETSI with an identifying change of release date and an increase in vers
13、ion number as follows: Version 5.x.y where: y the third digit is incremented when editorial only changes have been incorporated in the specification; the second digit is incremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. x Page 6 GSM 03.1 2 version 5.0
14、.0: November 1996 Blank Page Page 7 GSM 03.12 version 5.0.0: November 1996 1 Scope This Global System for Mobile communications Technical Specification (GTS) describes the procedures in the network related to location registration. They include: - location updating; - location cancellation; - period
15、ic location updating; - IMSI attachldetach. The procedures in the Mobile Station (MS) are described in GSM 03.22. The procedures between MSC, VLR and HLR utilize the Mobile Application Part (MAP) and details concerning the exchange of information are contained in GSM 09.02. 1.1 Normative references
16、This GTS incorporates by dated and undated 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 app
17、ly to this GTS only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. 31 41 I71 91 GSM O1 .O4 (ETR 350): “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. GSM 03.02: “Digital cellula
18、r telecommunications system (Phase 2+); Network architecture“. GSM 03.03 (ETS 300 927): “Digital cellular telecommunications system (Phase 2+); Numbering, addressing and identification“. GSM 03.07: “Digital cellular telecommunications system; Restoration procedu res“. GSM 03.08: “Digital cellular te
19、lecommunications system (Phase 2+); Organization of subscriber data“. GSM 03.20 (ETS 300 929): “Digital cellular telecommunications system ; Security related network functions“. GSM 03.22 (ETS 300 930): “Digital cellular telecommunications system; Functions related to Mobile Station (MS) in idle mod
20、e and group receive mode“. GSM 09.02 (ETS 300 974): “Digital cellular telecommunications system (Phase 2+); Mobile Application Part (MAP) specification“. GSM 09.07 (ETS 300 976): “Digital cellular telecommunications system (Phase 2+); General requirements on interworking between the Public Land Mobi
21、le Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)“. 1.2 Abbreviations Abbreviations are listed in GSM 01.04. STD-ETSI GSM 03-LZ-ENGL L77b H 3400855 OL59LLO 29i Page 8 GSM 03.12 version 5.0.0: November 1996 2 Definitions 2.1 Location regi
22、stration Location registration means that the PLMNs keep track of where the MSs are located in the system area. The location information for each MS is stored in functional units called location registers. Functionally, there are two types of location registers: - the home location register where al
23、l subscriber parameters of a MS are permanently stored, and where the current location may be stored; the visitor location register where all relevant data concerning a MS are stored as long as the station is within the area controlled by that visitor location register. - See also GSM 03.02 where th
24、e network architecture is described, and GSM 03.08 where the data stored in the location registers are described. The action taken by a MS in order to provide location information to the PLMN will be referred to as location updating. 2.2 Location area and MSC area The MSC area is composed of the are
25、a covered by all base stations controlled by the MSC. A MSC area may consist of several location areas. A location area is an area in which MSs may roam without updating the location registers. A location area consists of one or more cells. The paging procedure is used by the MSC to determine the ce
26、ll in which the MS is located. For further details of the network architecture, see GSM 03.02. 2.3 Location area identification The Location Area Identification (LAI) plan is part of the base station identification plan. The base stations are identified uniquely (see GSM 03.03). The Location Area Id
27、entification is included in messages sent in the BCCH. 2.4 IMSI detachattach operation The support of IMSI detach/attach operation is mandatory in MSs. The facility is optional in the fixed infrastructure of the PLMN. 2.4.1 Explicit IMSI detachattach Explicit IMSI detach operation is the action take
28、n by an MS to indicate to the PLMN that the station has entered an inactive state (e.g. the station is powered down). Explicit IMSI attach operation is the action taken by an MS to indicate that the station has re-entered an active state (e.g. the station is powered up). 2.4.2 Implicit IMSI detach I
29、mplicit IMSI detach operation is the action taken by the VLR to mark an MS as detached when there has been no successful contact between the MS and the network for a time determined by the implicit detach timer. The value of the implicit detach timer is derived from the periodic location updating ti
30、mer. During an established radio contact, the implicit detach timer shall be prevented from triggering implicit detach. At the release of the radio connection, the implicit detach timer shall be reset and restarted. Implicit IMSI detach shall also be performed in the case of a negative response to a
31、n IMEI check. 2.5 Use of the term mobile station (MS) in this GTS In order to simplify the text the term Mobile Station (MS) as used in relation to location registration refers to the entity where the IMSI is stored, .e., in card operated MSs the term Mobile Station (MS) refers to the card. GSM 03.1
32、2 version 5.0.0: 3 3.1 The MSC shall pass messages related to location updating between the MS and the VLR 3.2 Procedures in the network related to location updating Procedures in the MSC related to Location Updating Procedures in the BSC related to Location Updating Page 9 November 1996 The BSC sha
33、ll insert the Location Area Identification, periodic location updating time-out value and IMSI detacMattach supported information on the BCCH. 3.3 Normal location updating and IMSI detacMattach operation When receiving a Location Updating Request or an IMSI detachlattach message from an MS, the MSC
34、shall convey the message to its associated visitor location register. Any response from the location register shall similarly be conveyed to the MS. 3.4 IMSI enquiry procedure The MS shall identify itself by either the IMSI or the TMSI plus Location Area Identification of the previous VLR. In the la
35、tter case the new VLR shall attempt to request the IMSI and authentication parameters from the previous VLR by the methods defined in GSM 09.02. If this procedure fails, or if the TMSI is not allocated, the VLR shall request that the MS identifies itself by use of the IMSI. 3.5 Information transfer
36、between visitor and home location registers 3.5.1 Procedures for location registration Detailed procedures for exchange of and location updating information between visitor and home location registers are given in GSM 09.02. Below follows an overview of these procedures. 3.5.1.1 Location updating pr
37、ocedure This procedure is used when an MS registers with a visitor location register. The visitor location register provides routing information to the home location register. This information consists, for instance, of VLR address used for routing of MAP messages. The VLR may also allocate an optio
38、nal identity for the MS at location updating: the Local Mobile Station Identity (see GSM 03.03). 3.5.1.2 Downloading of subscriber parameters to the VLR As a part of the location updating procedure, the home location register will convey the subscriber parameters of the MS which need to be known by
39、the visitor location register for proper call handling. This procedure is also used whenever there is a change in the subscriber parameters that need to be conveyed to the VLR (e.g. change in subscription, a change in supplementary services activation status). If the HPLMN applies the multinumbering
40、 option, different MSISDNs are allocated for different Basic Services (see GSM 09.07) and stored in the HLR. Among these MSISDNs, the Basic MSISDN Indicator as part of the HLR subscriber data (see GSM 03.08) marks the Basic MSISDN to be sent to the VLR at location update, It is used in the VLR for c
41、all handling as calling party and as line identity. 3.5.1.3 Location cancellation procedure The procedure is used by the home location register to remove a MS from a visitor location register. The procedure will normally be used when the MS has moved to an area controlled by a different location reg
42、ister. The procedure can also be used in other cases, e.g. an MS ceases to be a subscriber of the home PLMN. Page 10 GSM 03.1 2 version 5.0.0: November 1996 3.5.1.4 Subscriber parameter request procedure This procedure enables a visitor location register to request the HLR (at any time) to provide s
43、ubscriber parameters for a specified MS (e.g. after a restart). 3.5.1.5 Mobile subscriber purging procedure A VLR may purge the subscriber data for an MS which has not established radio contact for a period determined by the network operator. Purging means to delete the subscriber data and to “freez
44、e“ the TMSI that has been allocated to the purged MS in order to avoid TMSI double allocation. The VLR shall inform the HLR of the purging. When the HLR is informed of the purging, it shall set the flag “MS purged“ in the IMSI record of the MS concerned. Presence of the “MS purged“ flag will cause a
45、ny request for routing information for a call or short message to the MS to be treated as if the MS were not reachable. In the VLR, the “frozen“ TMSI is freed for usage in the TMSI allocation procedure by location updating for the purged MS in the same VLR, location cancellation for the purged MS or
46、, in exceptional cases, by O&M. In the HLR, the “MS purged“ flag is reset by the location updating procedure and after reload of data from the non-volatile back-up that is performed when the HLR restarts after a failure. 3.5.1.6 Recovery procedures Recovery and restoration procedures for location re
47、gisters are defined in Technical Specifications GSM 03.07 and 09.02. Recoveiy arrangements should be such that MSs with a valid subscription are not deleted from the HLR as a result of HLR failure. The worst result of an HLR failure will thus be that some MSs are stored with errors in the temporary
48、subscriber data. 4 Authentication Authentication at location updating and IMSI attach shall be in accordance with GSM 03.20. - STD-ETSI GSM 03.12-ENGL L77b 3Li00855 0157113 TT3 Page 11 GCM 03.12 version 5.0.0: November 1996 History Document history I 1 November 1996 1 Publication of version 5.0.0 (based on version 4.4.2) ISBN 2-7437-1 167-1 Dpt lgal : Novembre 1996
