1、* m 3400855 0079105 874 m GSM GSM 03.67 January 1996 Version 5.0.0 Source: ETSI TC-SMG Reference: TSBMG-030367Q ICs: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Digital cellular telecommunicati
2、ons system (Phase 2+); enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 2 (GSM 03.67) ETSI European Telecommunications Standards Institute ETSI Secretwiat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbon
3、ne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat Q et.s.fr Tel.: +33 92 94 42 O0 - Fax: +33 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 a
4、ll media. Q European Telecommunications Standards Institute 1996. All rights reserved. = 3400A55 0079LOb 700 = Page 2 GSM 03.67 Version 5.0.0: January 1996 Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur.
5、If you have comments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. - 3400855 0079107 b47 Page 3 GSM 03.67 Version 5.0.0: January 1996 Contents Foreword . 5 1 2 3 4 5 6 7 8 9 10 11 Scope 7 Normative references 7 Definitions
6、 and abbreviations 8 3.1 Definitions . 8 3.2 Abbreviations 8 Main concepts . 9 General architecture 11 Compatibility issues . 12 Transmission . 12 Information storage . 13 Stored in the HLR 13 Stored in the VLR 13 Stored in the MSC . 13 Stored in the SIM 13 Stored in the GCR . 14 8.1 8.2 8.3 8.4 8.5
7、 Identities . 14 Operation and maintenance aspects . 14 11.3.2 Functions and information flow 14 1 1.1 Subscription 14 11.2 Change of subscription 14 11.3 Call Set-up 14 Mobile originated calls 14 11.3.1.1 Indication of priority 14 11.3.1.2 Subscription checking 15 11.3.1.3 Authentication and cipher
8、ing 15 11.3.1.4 Indication of priority to the BSC . 15 11.3.1.5 Choice of radio channel . 15 Mobile terminated calls . 15 11.3.2.1 Indication of priority 15 11.3.2.2 Authentication and ciphering 16 11.3.2.3 Termination with called subscriber in idle mode . 16 11.3.2.4 Termination with called subscri
9、ber in dedicated mode 16 Voice group call or voice broadcast call . 16 11.3.3.1 Indication of priority to the related MSC 16 11.3.3.2 Authentication and ciphering 16 11.3.3.3 Indication of priority to the called mobile stations . 17 11.3.1 11.3.3 11.4 Pre-emption 17 Choice of communication to pre-em
10、pt 17 11.4.2 Release procedures . 17 Pre-emption at handover 17 11.4.1 11.5 11.6 Overview of signalling 17 3400855 007l108 583 = Page 4 GSM 03.67 Version 5.0.0: January 1996 History . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、. . . . . . . .26 Page 5 GSM 03.67 Version 5.0.0: January 1996 Blank page 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 Standards Institute (ETSI). Th
12、is GTS defines the stage 2 of the enhanced Multi-Level Precedence and Pre-emption Service (eMLPP) within the digital cellular telecommunications system (Phase 2iPhase 2+). GTS are produced by TC-SMG to enable the GSM Phase 2+ specifications to become publicly available, prior to submission for the f
13、ormal 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 System for Mobile communications. The contents of this GTS a
14、re 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 version number as follows: Version 5.x.y where: y the third dig
15、it is incremented when editorial only changes have been incorporated in the specif cat ion; x the second digit is incremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. Reference is made within this GTS to GSM-TSs (note). NOTE: TC-SMG has produced document
16、s which give the technical specifications for the implementation of the digital cellular telecommunications system. Historically, these documents have been identified as GSM Technical Specifications (GSM-TSs). These TSs may have subsequently become I-ETSs (Phase l), or ETSs/ETSI Technical Reports (E
17、TRs) (Phase 2). TC-SMG has also produced ETSI GSM TSs which give the technical specifications for the implementation of Phase 2+ enhancements of the digital cellular telecommunications system. These version 5.x.x GSM Technical Specifications may be referred to as GTSs. 3400855 0079110 131 Page 6 GSM
18、 03.67 Version 5.0.0: January 1996 Blank page = 3400855 0079111 078 Page 7 GSM 03.67 Version 5.0.0: January 1996 1 Scope This Global System for Mobile communications Technical Specification (GTS) specifies the stage 2 description of the enhanced Multi-Level Precedence and Pre-emption Service (eMLPP)
19、 which provides different call priorities in combination with fast call Set-up and pre-emption for different applications according to GSM 02.67 3. 2 Normative references This specification incorporates by dated and undated references, provisions from other publications. These normative references a
20、re 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 specification only when incorporated in it by amendment or revision. For undated references the latest edit
21、ion of the publication referred to applies. 11 I 121 31 41 GSM O1 .O4 (ETR 100): “European digital cellular telecommunications system (Phase 2); Abbreviations and acronyms“. GSM 02.40 (ETS 300 51 2): “European digital cellular telecommunications system (Phase 2); Procedures for call progress indicat
22、ions“. GSM 02.67: “Digital cellular telecommunications system (Phase 2+); Enhanced Multi-Level Precedence and Pre-emption eMLPP stage 1 “. GSM 03.68: “Digital cellular telecommunications system (Phase 2+); Voice Group Call Service (VGSC) stage 2“. GSM 03.69: “Digital cellular telecommunications syst
23、em (Phase 2+); Voice Broadcast Service (VBS) stage 2“. GSM 08.08 (ETS 300 590): “European digital cellular telecommunications system (Phase 2); Mobile Switching Centre - Base Station System (MSC - BSS) interface Layer 3 specification“. ITU-T recommendation Q.85: “Stage 2 description for community of
24、 interest supplementary services (clause 3: Multi-Level Precedence and Pre-emption MLPP)“. ITU-T recommendation (3.735: “Stage 3 description for community of interest supplementary services using SS No. 7 (clause 3: Multi-Level Precedence and Pre-emption (MLPP)“. W 3400855 0079332 TO4 = Page 8 GSM 0
25、3.67 Version 5.0.0: January 1996 3 Definitions and abbreviations 3.1 Definitions Definitions used in this specification are also defined in GSM 02.67. resource pre-emption: The termination of a call of a low priority user such that resources can be made available for a precedence call of higher prio
26、rity. Resource pre-emption could be initiation resource pre- emption or handover resource pre-emption. called-party pre-emption: Termination of a call to a particular user when a higher priority call is directed towards that specific user. Called party pre-emption is decided by the mobile station. I
27、n case of point-to- point calls, this shall be performed by Call Waiting with automatic acceptance of the waiting call by the mobile station. compatible mobile station: Mobile stations which support eMLPP and therefore have precedence and pre-emption capabilities. non-compatible mobile station: Mobi
28、le stations which do not support eMLPP. 3.2 Abbreviations Abbreviations used in this specification are listed in GSM O1 .O4 l. For the purpose of this specification, the following abbreviations apply: eMLPP: VBS: Voice Broadcast Service VGCS: Voice Group Call Service. enhanced Multi-Level Precedence
29、 and Pre-emption 3400855 0079113 940 Page 9 GSM 03.67 Version 5.0.0: January 1996 4 Main concepts The enhanced Multi-Level Precedence and Pre-emption service (eMLPP) provides different levels of precedence for call set-up and for call continuity in case of handover. There are seven priority levels w
30、hich are defined in TS GSM 02.67. The two highest levels are reserved for network internal use. These two levels can only be used locally, .e. in the domain of one MSC. The other five priority levels are offered for subscription and can be applied globally, e.g. on inter switch trunks, if supported
31、by all related network elements, and also for interworking with ISDN networks providing the MLPP service. The seven priority levels are defined as follows: A B (for network internal use) O (for subscription) 1 (for subscription) 2 (for subscription) 3 (for subscription) 4 (lowest, for subscription).
32、 (highest, for network internal use) Levels A and B shall be mapped to level O for priority treatment outside of the MSC area in which they are applied. As a network specific configuration, the ability to pre-empt other calls of lower priority and the application of fast call set-up procedures can b
33、e assigned to each priority level. An example for an eMLPP configuration is given in TS GSM 02.67. NOTE 1: The present specification defines the concepts for handling of priorities in the network including the indication whether pre-emption or fast call set-up procedures are to be applied. Note that
34、 the call set-up procedures themselves are specified in the corresponding stage 2 descriptions of the services where they are to be used. There is presently only a requirement for VBS and VGCS (TS GSM 03.69 and TS GSM 03.68, respectively). NOTE 2: The network operator has to assure that the particul
35、ar eMLPP configuration he applies and the subscriptions he issues are coordinated with the network planning (especially for blocking) and the implementation options applied (e.g. the use of OACSU) in order to guarantee the service performance for the subscriber. Remark: Guidance for this may be give
36、n in a report to be issued or annexed to an existing report. Considering aspects of priority handling, the following issues can be considered for each call: a) contention during the initial random access (no specific definitions apply for eMLPP. Delays due to access collision have to be managed by a
37、 corresponding planning of the network resources); b) contention in gaining radio resources during the call set-up phase and during handover (this item relates to the assignment of SDCCH and TCH for which queuing and pre-emption mechanisms are applied for eMLPP); A pre-emption might already be perfo
38、rmed as a network option on the basis of the establishment cause if a network specific eMLPP configuration assigns a certain priority level to a particular establishment cause. m 3900855 0079LLY 887 m Page 10 GSM 03.67 Version 5.0.0: January 1996 contention in gaining terrestrial resources inside th
39、e GSM network (this item relates to the assignment of terrestrial channels between the GSM network nodes. Priority actions shall be performed on basis of the MLPP service implementations. The eMLPP priority levels A and B shall be mapped to the MLPP priority level O. No further specific definitions
40、apply for eMLPP); contention in gaining terrestrial resources in external networks (this item relates to interworking with extemal networks which shall be performed on basis of the MLPP service if provided in the related external networks.); application of different call Set-up procedures in relatio
41、n to the priority levels and the network specific configuration (three classes of set-up performance are defined in TS GSM 02.67, one very fast class for VBS or VGCS emergency call services, one class for fast but normal Set-up times and one class allowing some delay in the Set-up. The application o
42、f the corresponding procedures shall be decided by the network on the basis of the requested priority level); automatic answering of calls if the incoming call is of or exceeds a defined priority level, respectively, or called party pre-emption (if the called GSM subscriber is engaged in communicati
43、on of a lower priority); the means by which the called user is informed of priority issues and is able to make appropriate decisions if no called party pre-emption applies; the accommodation of non-compatible mobile stations. The definitions in the present specification focus on the issues under ite
44、m b), e), f), g) and h). Items c) and d) are related to the MLPP service implementation for the signalling system No. 7 according to ITU-T Recommendations (2.85 and (2.735. For a call establishment, a subscriber shall be able to select any one of the priority levels he has subscribed to. Priorities
45、shall be treated in the network as defined in TS GSM 02.67. Priority treatment is different for point-to-point calls and voice broadcast calls or voice group calls, respectively: - mobile originated point-to-point call: The priority level depends on the calling subscriber. If the user has no eMLPP s
46、ubscription, the call shall have a default priority level defined in the network. If the user has an eMLPP subscription, the call shall have the priority level selected by the user at Set-up or the priority level predefined by the subscriber as default priority level by registration. - mobile termin
47、ated point-to-point calls: The priority level depends on the calling party. For this, interworking with the ISDN MLPP service is required. If the call is not an MLPP call, .e. no priority level is defined, the call shall be treated in the mobile network with a default priority level. If the call is
48、an MLPP call, the call shall be treated with the priority level provided by the interfacing network. - mobile to mobile point-to-point calls: The priority shall be treated for the calling subscriber as for mobile originated calls and for the called subscriber as for mobile terminated calls. However,
49、 an interworking with MLPP is not required if both the calling subscriber and the called subscriber are located in the same MSC area. - voice broadcast calls (VBS) and voice group calls (VGCS): The link on the voice broadcast call channel or voice group call channel shall have the priority level as defined in the corresponding registration for the related voice broadcast call or voice group call in the GCR. At the early stage of a voice broadcast call or voice group call establishment, before the GCR request is made and the voice broa
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