1、3404583 0074025 TLL = ETSI/TC SMG Released by : ETSI/PT 12 Release date: February 1992 RELEASE NOTE Report GSM 11.32 Visitor Location Register Specification Previously distributed version : 3.2.1 (Release 1 /90) New Released version February 92 : 3.2.1 (Release 92, Phase 1) 1. Reason for chanaes No
2、changes since the previously distributed version. 3404583 0074026 958 ETS I-GS M Tech n ica I S pecif cat ion GSM 11.32 Version 3.2.1 UDC: 621.396.21 Key words: European Digital Cellular Telecommunications System, Global System for Mobile Communications (GSM) European digital cellular telecommunicat
3、ion system (phase 1); Visitor Location Register Specification ETSI European Telecommunications Standards Institute ETSI Secretarlat: B.P.152 . F - 06561 Valbonne Cedex . France TP. + 33 92 94 42 00 TF. + 33 93 65 47 16 Tx. 47 00 40 F Previous page - Copyright European Telecommunications Standards In
4、stitute 1992. All rights resewed. is blank No part may be reproduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. m 3404583 0074027 894 m PREFATO
5、RY NOTE ETSI has constituted stable and consistent documents which give specifications for the implementation of the European Cellular Telecommunications System. Historically, these documents have been identified as “GSM recommendations“. Some of these recommendations may subsequently become Interim
6、 European Telecommunications Standards (I-ETSs) or European Telecommunications Standards (ETSs), whilst some continue with the status of ETSI-GSM Technical Specifications. These ETSI-GSM Technical Specifications are for editorial reasons still referred to as GSM recommendations in some current GSM d
7、ocuments. The numbering and version control system is the same for ETSI-GSM Technical Specifications as for “GSM recommendations“. 3404583 0074028 720 GSM 11.32 - version 3.2.1 - Page 2 The scope of this report is to give guidelines concerning the specification of the Visitor Location Register (VLR)
8、. In the case of discrepancy between this report and the approved core GSM recommendations the later shall prevail. Each function is specified as either mandatory or optional. The different functions provided by the VLR are identified with an indication of the relevant recommendations where the defi
9、nitive Specifications can be found. The purpose of this report is to give an overview of the VLR functions needed to implement the GSM system, in order to help both the Administrations/Operators in the procurement of their equipments and the manufacturers tendering the VLR. A list of the contents wh
10、ich may be found in a national specification for such equipment is given as an appendix to this report. Note that some items in this list are not specified by GSM, but are left to the discretion of the operators. 1. I“ The VLR, as described in this and all other GSM recommendations, is not a physica
11、l entity and need not be implemented as such, it is, rather, a set of functions which are required to manage the mobile nature of subscribers active in the PLMN area(s) related to the VLR. The VLR provides a local store of all the variables and all the functions needed to handle calls to and from su
12、bscribers in the location areas related to the VLR. It also supports location updating of subscribers and retrieves from the HLR the information required for local storage. It may also retrieve some information about subscribers that have just entered its area from the VLR related to the previous ar
13、ea that the MS was registered in. VLR functions may be incorporated into a single physical entity or distributed or combined with other PLMN entities such as a MSC. 2. DEFINITIONS The term Visitor Location Register (VLR) is defined in Recommendation GSM 01.04 and a more full description can be found
14、 in Recommendation GSM 03.02. GSM 11.32 - version 3.2.1 - Page 3 3. ARCHITECTURE The network architecture is defined in Recommendation GSM 03.02 where it is shown how the VLR is related to other functional entities of the PLMN. The architecture allows several ways to implement VLRs meet various nati
15、onal needs and allow flexiblity for future development of GSM PLMNs. in order to Irrespective of national solutions the requirements specified below as mandatory are required in order to allow full connectivity of GSM PLMNs nationally and internationally. 4. INTERFACE The VLR must support signalling
16、 to and from MSCs and HLRs the home and other PLMNs) and to other VLRs in the same PLMN. (both of The signalling used to provide information transfer between a VLR and OMC is a national matter. However, international standards are emerging which will facilitate the transfer of such information betwe
17、en VLRs and different OMC implementations, protocols. These standards will be embodied in the Telecommunication Management Network (TMN) concept - described in Recommendation GSM 12.00. Also, Recommendations GSM 12.01 and 12.14 define information transfer principles with other OSaCp Servicm H- The p
18、rocedures related to the point-to-point Short Message Service (SMS) are given in Recommendation GSM 03.40. The VLR must store a Messages-Waiting-Flag (MWF), defined in Recommendation GSM 03.40, which is a temporary subscriber data, indicating if any messages are waiting to be delivered to the MS. W
19、3404583 0071.1033 078 = GSM 11.32 - version 3.2.1 - Page 7 The procedures related to authentication are given in Recommendation GSM 03.20. The detailed procedures are also given in Recommendation GSM 09.02. They include - procedures between the MSC and the VLR for basic authentication. - procedures
20、between the VLR and the HLR by which the VLR obtains RAND/SRES vectors (Random Number / Signed Response Vectors) - procedures between the VLR and the previous VLR where the new VLR obtains RAND/SRES vectors from the previous vLR (authentication at location registration). The VLR must contain functio
21、ns by which the RAND/SRES comparison described in Recommendation GSM 03.20 can be performed. The VLR may also (national option) contain functions where the authentication key is used directly for authentication, see Recommendation GSM 03.20. 5.7. Locatlan re- The definition of location registration
22、is contained in Recommendation GSM 03.01. The functions of the VLR related to location registration are given in Recommendation GSM 03.12. The procedures are specified in Recommendation GSM 09.02. Functions of the VLR related to location registration are : 5.7.1. The VLR will initiate location regis
23、ter updating of the HLR when a MSC associated with the VLR requests location registration of a MS which is previously unknown to the VLR When Alternative 1 of paragraph 5.2 applies, the VLR allocates a mobile station roaming number which is passed to the HLR with the VLR number. When Alternative 2 o
24、f paragraph 5.2 applies, the VLR will give the VLR number and may give the MSC number to the HLR. If a roaming allowed indication together with subscriber parameters for the MS are received from the HLR, the VLR will store subscriber information for the MS. If a negative result is received (e.g. unk
25、nown subscriber, roaming not allowed), no information on the MS is stored in the VLR. 3404583 0074034 T24 a GSM 11.32 - version 3.2.1 - Page 8 5.7.2. The VLR will also update the HLR if the MS is known to the VLR, but the updating, call Set-up or operation of a supplementary service takes place in a
26、 new location area of the VLR where a new mobile station roaming number has to be allocated. 5.7.3. Updating of the HLR is also required when mobile station roaming numbers have to be re-allocated. 5.7.4. Updating of the HLR in also required when the YSC address has to be changed 5.7.5. In the norma
27、l case, updating of the HLR is not required if a location updating takes place between location areas of the VLR with no change of the routing information. If a reset message has been received from the HLR and the reset flag has not been removed against the MS, the VLR will perform a normal location
28、 updating of the HLR (see Recommendation GSM 03-07). 5.7.6. The VLR should delete a MS from the register when - a location cancellation is requested by the HLR, - a MS may also be deleted if it has been silent for a long time. This is a network ption in order to avoid exhaustion of mobile stz:ion ro
29、aming numbers and should only be applied when shcrtage of such numbers occurs. 5.7.7. If the VLR receives supplementary services parameters or other parameters which are not supported by the VLR and these parameters are not essential for providing basic services to the MS, these parameters are ignor
30、ed and the facilities associated with them will not be offered. The ciphering key (Kc) is transferred to the VLR together with the RAND/SRES vectors, see Recommendation GSM 03.20, The management of the key is defined in Recommendation GSM 03.20. If required, the VLR must be capable of allocating han
31、dover numbers as described in section 5.2 above. See also Recommendations GSM 03.09 and 09.02, The handover number is removed at the end of the call. 3404583 O074035 960 GSM 11.32 - version 3.2.1 - Page 9 5.10. US1 detach/att& onerata This function is a PLMN option it is described in Recommendation
32、GSM 03.12. The procedures between the MSC and the VLR are defined in Recommendation GSM 09.02. The VLR may contain facilities by which the function is controlled, i.e. whether IMSI detach cperation is allowed or not allowed for a period of time. If required, the VLR must operate a IMSI detached flag
33、 as described in Recommendation GSM 03.12. The VLR must contain a supervisory function by which it can determine that TMSI cannot be used on the radio path, e.g. because the subscriber file in the VLR is under restoration. . The procedures are described in recommendation GSM 03.07. The VLR should su
34、pport the search procedure of Recommendation GSM 09.02 after an outage. 6. -ION OF Vl.R+i HT- Recommendation 09.02 contains restoration procedures to be used after outage of the VLR itself or after outage of a HLR. 7. WON AND General aspects of O&M matters are dealt with in the GSM 12 series recomme
35、ndations: Recommendation GSM 12.14 presents the general principle of VLR maintenance. 8. -ORMANCE ORJKCTIVES Performance objectives for VLRs are given in Recommendation GSM 03.05. m 3404583 O074036 8T7 GSM 11.32 - version 3.2.1 - Page 10 9- - This is a national matter. 10. ACCEPTANCE- This is a nati
36、onal matter. This is a national matter. 3404583 0074037 733 11.32 Annex - version 3.2.1 - page A-1 VLR structure cross reference and indication of responsibility Item O. SCOPE 1. INTRODUCTION 2. DEFINITIONS 3. ARCHITECTURE 4. INTERFACE Within PLMN GSM GSM National matter GSM Between PLMNs 4.1 Suppor
37、t of Mobile Application Part (MAP) 5. FUNCTIONS OF THE VLR 5.1. Organization of subscriber data 5.2. Management and allocation of numbers and identities 5.2.1. MSRN 5.2.2. Allocation of Handover Numbers 5.2.3. Allocation of TMSI 5.3. Call handling functions of the VLR GSM GSM GSM GSM.ref 01.04 03.02
38、 03.04 09.02 IS. xx 03.04 09.02 09.02 03.08 03.01 03.03 03.08 03.09 03.12 03.20 09.02 03.01 03.02 03.04 09.02 3404583 0074038 b7T m 11.32 Annex - version 3.2.1 - page A-2 vLR structure cross reference and indication of responsibility 5.4. Handling of supplementary services Call forwarding unconditio
39、nal Call forwarding on mobile subscriber busy Call forwarding on no reply Call forwarding on mobile subscriber not reachable Barring of ali outgoing calls Barring of outgoing international calls Barring of outgoing international calls except those directed to the home PLMN country Barring of all inc
40、oming calls Barring of incoming calls when roaming outside the home PLMN country 5.5. Short Message Service Handling 5.6. Authentication 5.7. Location registration 5.8. Support of encryption GSM GSM GSM GSM GSM 1 1 102.04 1 )03.11 ) )03.82 1 1 1 ) ) 1 ) )02.04 ) 103.11 1 )03.88 ) ) ) ) 1 03.40 03.20
41、 09.02 03.01 03.07 03.12 09.02 03.20 = 3404583 0074039 50b 11.32 Annex - version 3.2.1 - page A-3 VLR structure cross reference and indication of responsibility 5.9. Handover 5.10. IMSI detach/attach operation 5.11. Use of TMSI or IMSI 5.12. Search procedure 6. RESTORATION OF VLRs and HLRs 7. OPERATION AND MAINTENANCE 8. PERFORMANCE OBJECTIVES 9. QUALITY CONTROL 10. ACCEPTANCE TESTING 11. ENVIRONMENTAL CONDITIONS GSM GSM GSM GSM GSM National matter National matter Nat i ona 1 matter Iuational matter 03.09 09.02 03.12 09.02 03.07 03.07 09.02 03.07 09.02 12.00 12.14 03.05
