SIST EN 300 925 V6.0.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 6.0.1 Release 1997)
- Abstract
Upgrade from Phase 2+ to Release 1997
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
- Mandate
- UIC
SIST EN 300 925 V6.0.1:2003 is the Slovenian adoption of EN 300 925 Version 6.0.1 for the GSM Voice Group Call Service (VGCS) stage 1. It specifies how a predefined group of subscribers can use a half-duplex voice group call in the digital cellular telecommunications system, and it is written for network operators, service providers, and users such as dispatchers.
What does SIST EN 300 925 V6.0.1:2003 specify?
SIST EN 300 925 V6.0.1:2003 specifies the stage 1 service description for VGCS in GSM. In practice, that means it defines the service from the subscriber and user point of view: who may use it, how a group call starts and ends, and how it behaves with other GSM services.
The scope is limited to mobile stations and areas that have the technical capability and the relevant subscription to participate in VGCS calls. The document also states that normal GSM phase 2 mobile stations are not expected to support the service.
The standard is organized into clauses 1 to 8, plus one informative annex:
| Annex | What it covers |
|---|---|
| Annex A | Status of Technical Specification GSM 02.68 |
Clause 1 gives the scope, clause 2 lists references, clause 3 defines terms and abbreviations, clauses 4 to 8 describe the service, and Annex A records the status history of GSM 02.68.
What are the key requirements of SIST EN 300 925 V6.0.1:2003?
SIST EN 300 925 V6.0.1:2003 defines VGCS as a half-duplex service for a predefined group call area and group ID. That matters because only one service subscriber may talk at a time, so the network has to control turn-taking and channel allocation.
Provision and network configuration
Clause 5.1 says VGCS is provided after prior arrangements with the service provider, and a subscription can include up to 50 group IDs. Clause 5.3 says each voice group call is pre-registered in the network with its group ID, group call area composition, dispatcher identities, and the group call reference used for COLP. In practice, operators must plan the service data in advance, not on the fly.
Call establishment and talk rights
Clause 5.4 and clause 4 set out the basic call behavior: the network automatically initiates the call when a service subscriber or dispatcher dials the designated short code or address. The calling subscriber gets an indication when the call is established, and under normal conditions the uplink assignment for a service subscriber who wants to talk is performed within 300 ms after the request. This is important for user experience and for applications where quick floor control matters.
VGCS allows only one talking service subscriber at a time, but up to five dispatchers may talk simultaneously. Listeners hear the combined voices. Service subscribers who want to speak must request the floor, while dispatchers can talk without asking.
Security, priority, roaming, and release
Clause 4 states that authentication is mandatory at GSM call set-up, although it may be delayed for faster VGCS setup. Confidentiality on the radio path is optional. The same clause also applies eMLPP priorities and pre-emption, so priority handling is part of the service design.
VGCS also supports roaming through supra-PLMN group IDs, which must be coordinated between operators and known in the network and SIM. Clause 4 and clause 5.4 also require release on demand, automatic release after selectable voice inactivity, and continued network maintenance of the call if the active uplink user leaves the group call area.
Service interactions and exceptions
Clause 6 describes failure handling if the subscriber is not entitled or the service cannot be provided. Clause 7 then states how VGCS interacts with other GSM services such as CLIP, CLIR, COLP, COLR, call forwarding, call waiting, hold, MPTY, barring, ECT, SMS, and ODB. For implementation, this clause is the main checklist for conflicts and overrides.
What terms does SIST EN 300 925 V6.0.1:2003 define?
- Voice Group Call Service (VGCS) - A speech service for a predefined group in which one service subscriber talks at a time on the radio link.
- Group ID - A numerical classification used to identify the subscribed voice group.
- Group call area - A predefined cluster of cells where a particular VGCS call is distributed.
- Service subscriber - A mobile subscriber who has subscribed to VGCS.
- Dispatcher - A fixed-line or mobile user pre-identified in the network who receives and can initiate certain VGCS calls.
- Public Land Mobile Network (PLMN) - The mobile network context used for defining group IDs and group call areas.
- Subscriber Identity Module (SIM) - The SIM stores items such as group selection lists and, where applicable, nominated acknowledgement data.
Who uses SIST EN 300 925 V6.0.1:2003?
SIST EN 300 925 V6.0.1:2003 is used by network operators and service providers that offer VGCS subscriptions. They use it to configure group IDs, define group call areas, register dispatchers, and set the rules for roaming, priority, and call interaction.
It is also relevant to GSM system designers and operations teams that need to handle group communications with controlled floor access. The examples in the standard point to uses where group notification and priority handling matter, such as emergency-style group calls.
What changed in SIST EN 300 925 V6.0.1:2003 from the previous edition?
SIST EN 300 925 V6.0.1:2003 is the Release 1997 version of GSM 02.68, and the scope identifies it as an upgrade from Phase 2+ to Release 1997. Annex A gives the status history of GSM 02.68 through earlier versions up to version 6.0.0.
Which standards are used with SIST EN 300 925 V6.0.1:2003?
- GSM 01.04 - Provides the abbreviations and acronyms used in the document.
- GSM 02.67 - Defines the stage 1 description of enhanced Multi-Level Precedence and Pre-emption service (eMLPP), which VGCS uses for priority handling.
What does the SIST EN 300 925 V6.0.1:2003 document contain?
The document contains a logical concept figure for VGCS, which shows the relationship between group IDs, group call areas, service subscribers, and dispatchers. It also contains a long clause on interactions with GSM services, making it useful as a service-behavior reference during design and integration.
Clause 5 covers provision, withdrawal, network configuration, call establishment, and charging notes. Clause 6 covers unsuccessful outcomes and exceptional cases, while clause 7 is the main interaction matrix for supplementary services and barring features. Annex A provides the version and status history of GSM 02.68 for traceability.
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Frequently Asked Questions
SIST EN 300 925 V6.0.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 6.0.1 Release 1997)". This standard covers: Upgrade from Phase 2+ to Release 1997
Upgrade from Phase 2+ to Release 1997
SIST EN 300 925 V6.0.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 925 V6.0.1:2003 is associated with the following European legislation: Standardization Mandates: UIC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 925 V6.0.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.JRYRUQHJDDigital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 6.0.1 Release 1997)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 925 Version 6.0.1SIST EN 300 925 V6.0.1:2003en01-december-2003SIST EN 300 925 V6.0.1:2003SLOVENSKI
STANDARD
EN 300 925 V6.0.1 (1999-09)European Standard (Telecommunications series)Digital cellular telecommunications system (Phase 2+);Voice Group Call Service (VGCS) - Stage 1(GSM 02.68 version 6.0.1 Release 1997)GLOBAL SYSTEM
FOR MOBILE COMMUNICATIONSRSIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)2(GSM 02.68 version 6.0.1 Release 1997)ReferenceDEN/SMG-010268Q6 (8kc0300o.PDF)KeywordsDigital cellular telecommunications system,Global System for Mobile communications (GSM)ETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88Internetsecretariat@etsi.frIndividual copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: editor@etsi.frCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1999.All rights reserved.SIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)3(GSM 02.68 version 6.0.1 Release 1997)ContentsIntellectual Property Rights.4Foreword.41Scope.52References.53Definitions and abbreviations.53.1Definitions.53.2Abbreviations.64Description.65Normal operation with successful outcome.95.1Provision.95.2Withdrawal.105.3Network related service configuration.105.4Normal operation for voice group call establishment.105.5Charging requirements.106Exceptional procedures or unsuccessful outcome.107Interaction with other GSM services.117.1Calling Line Identification Presentation (CLIP).117.2Calling Line Identification Restriction (CLIR).117.3Connected Line Identification Presentation (COLP).117.4Connected Line Identification Restriction (COLR).117.5Call Forwarding Unconditional (CFU).117.6Call Forwarding on mobile subscriber Busy (CFB).117.7Call Forwarding on No Reply (CFNRy).117.8Call Forwarding on mobile subscriber Not Reachable (CFNRc).117.9Call Waiting (CW).127.10Call Hold (HOLD).127.11Multi-party Service (MPTY).127.12Closed User Group (CUG).127.13Advice of Charge (AoC).127.14Barring of All Outgoing Calls (BAOC).127.15Barring of Outgoing International Calls (BOIC).127.16Barring of Outgoing International Calls except those to the Home PLMN country (BOIC-exHC).127.17Barring of All Incoming Calls (BAIC).137.18Barring of Incoming Calls when Roaming outside the home PLMN country (BIC-Roam).137.19Explicit Call Transfer (ECT).137.20Enhanced Multi-Level Precedence and Pre-emption service (eMLPP).137.21Short Message Service (SMS).137.22Operator Determined Barring (ODB).138Interworking considerations.13Annex A (informative):Status of Technical Specification GSM 02.68.14History.15SIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)4(GSM 02.68 version 6.0.1 Release 1997)Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by the Special Mobile Group (SMG).The present document specifies the stage one description of the Voice Group Call Service (VGCS) within the digitalcellular telecommunications system.The contents of the present document may be subject to continuing work within SMG and may change following formalSMG approval. Should SMG modify the contents of the present document it will then be re-submitted for formalapproval procedures by ETSI with an identifying change of release date and an increase in version number as follows:Version 6.x.ywhere:6GSM Phase 2+ Release 1997xthe second digit is incremented for changes of substance, i.e. technical enhancements, corrections, updates,etc.;ythe third digit is incremented when editorial only changes have been incorporated in the specification.Proposed national transposition datesDate of adoption of this EN:3 September 1999Date of latest announcement of this EN (doa):31 December 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):30 June 2000Date of withdrawal of any conflicting National Standard (dow):30 June 2000SIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)5(GSM 02.68 version 6.0.1 Release 1997)1ScopeThe present document specifies the stage one description of the Voice Group Call Service (VGCS) which allows speechconversation of a predefined group of service subscribers in half duplex mode on the radio link taking into accountmultiple mobile service subscribers involved in the VGCS call per cell.The VGCS is applicable to all mobile stations in a certain network and area which have the technical capability and thecorresponding subscription, respectively, to participate in a VGCS call.NOTE:It is not considered as requirement that normal GSM phase 2 mobile stations will be able to be used forthis service.The service is described from the service subscriber's and user's point of view; in particular:-the procedure for normal operation with successful outcome;-the action to be taken in exceptional circumstances;-the interaction with other GSM services and features.The present document does not deal with the Man-Machine Interface (MMI) requirements, but makes reference to theappropriate Global System for Mobile Communications (GSM) specifications.The present document defines a teleservice of the digital cellular telecommunications system GSM. Any interaction withother services and/or networks not dealt with in clauses 7 or 8 are outside the scope of the present document.2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.· For this Release 1997 document, references to GSM documents are for Release 1997 versions (version 6.x.y).[1]GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations andacronyms".[2]GSM 02.67: "Digital cellular telecommunications system (Phase 2+); enhanced Multi-LevelPrecedence and Pre-emption service (eMLPP) - Stage 1".3Definitions and abbreviations3.1DefinitionsFor the purposes of the present document, the following terms and definitions apply:network operator: Entity which provides the network operating elements and resources for the execution of the VGCS.service provider: Entity which offers the VGCS for subscription. The network operator may be the service provider.SIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)6(GSM 02.68 version 6.0.1 Release 1997)voice group call: An instance of the VGCS initiated by a subscriber. This term is used synonymously with the term"VGCS call".service subscriber: Mobile subscriber which subscribes to the VGCS.group identification (group ID): A numerical classification. The maximum number of group IDs which can be definedin one PLMN depends on the maximum number of group call areas defined in this PLMN. The maximum number ofgroup IDs and group call areas combined is 108, Service subscriber shall be provided with one or up to 50 group IDs.dispatcher: Particular fixed line or mobile users are identified within the network as dispatchers. Dispatchers shallreceive all voice group calls to a certain group ID in a group call area (this shall be done automatically by the network).In addition they can initiate voice group calls to a group ID in a group call area.Dispatchers shall be connected to a voice group call by means of standard links via radio or via an ISDN. They shall becalled by their ISDN or MSISDN number, respectively. When dispatchers initiate voice group calls, they shall call aparticular MSISDN number which is related to a group ID and group call area. Dispatchers using the GSM network canbe located outside of this group call area.The identities of the dispatchers are exclusively predefined in the network by the service provider. There will be none orup to five dispatchers involved in a particular voice group call.destination subscriber: Service subscriber or dispatcher to which the VGCS call is directed.calling subscriber: Service subscriber or dispatcher which originates the VGCS call.group call area: Predefined area composed of one or a cluster of cells to which a particular VGCS call is distributed.The maximum number of group call area IDs which can be defined in one PLMN depends on the maximum number ofgroup IDs defined in this PLMN. The maximum number of group IDs and group call areas combined is 108, Thecomposition of a group call area is predefined in the network by the service provider. Changing of cell allocation in thenetwork due to operational reasons will need an adaptation of the group call area definition. The group call area mayinclude more then one MSC area and cells of more than one PLMN.group call member: Any service subscriber or dispatcher participating in an on going voice group call.3.2AbbreviationsAbbreviations used in the present document are listed in GSM 01.04.4DescriptionThe VGCS is defined in the following. Figure 1 gives an explanation of the logical concept of the VGCS.a)The VGCS enables a calling subscriber to establish a voice group call to destination subscribers belonging to apredefined group call area and group ID.NOTE 1:The service is provided by use of half duplex transmission mode.Applications for voice group call services typically involve multiple group members in a small group call area,for which the VGCS should provide spectrum efficient solutions.b)The calling subscriber as well as the destination subscribers may be any service subscriber which has subscribedto the related group ID or any dispatcher who is entitled to it by his identity which shall be registered in thenetwork.c)Destination subscribers are all service subscribers or a group of service subscribers identified by the called groupID which have their present location in the group call area, and pre-registered dispatchers. Destination servicesubscribers shall be notified with the group ID, not by paging the subscriber individually. Dispatchers shall becalled individually with their identity.Service subscribers may become late destination subscribers when entering the group call area within 500 msafter reception of the first notification message related to the VGCS call. Service subscribers which leave theSIST EN 300 925 V6.0.1:2003
ETSIEN 300 925 V6.0.1 (1999-09)7(GSM 02.68 version 6.0.1 Release 1997)corresponding group call area during an on going VGCS call of which they are member cease to be destinationsubscribers.d)The voice group call shall be established in a group call area which is comprised of one or a cluster of cells.Group call areas shall be predefined in the network by the service provider, co-ordinated by the netwo
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