SIST EN 300 925 V6.0.1:2003

• Abstract:

  Upgrade from Phase 2+ to Release 1997

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• 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
• Ref Project: ETSI EN 300 925 V6.0.1 (1999-09) - Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 6.0.1 Release 1997)

Overview

SIST EN 300 925 V6.0.1:2003 specifies the stage one service description for the Voice Group Call Service (VGCS) in the digital cellular telecommunications system (GSM), Phase 2+, aligning with GSM 02.68 version 6.0.1 Release 1997. This European standard, adopted by the Slovenski inštitut za standardizacijo (SIST), details how VGCS enables half-duplex group voice communications among mobile subscribers and dispatchers over predefined areas within GSM networks. The standard supports the transition from GSM Phase 2+ to Release 1997, establishing the framework for efficient and coordinated group voice communications in areas such as transportation, public safety, and industrial operations.

Key Topics

• VGCS Functionality: Outlines the procedures by which a calling subscriber (mobile user or dispatcher) can initiate a group call to multiple destination subscribers in a predefined "group call area". It covers group ID assignment, call initiation, management, and termination protocols.
• Subscriber & Dispatcher Roles: Defines the rights, obligations, and behaviors of both regular service subscribers and dispatchers, including how dispatchers can always initiate and manage group calls and are automatically included in relevant voice group calls.
• Group Call Areas and Group IDs: Explains structuring and coordination of group call areas and IDs, critical for grouping users and coverage planning. Each group call is linked to specific group IDs and call areas, ensuring targeted communication.
• Service Provisioning & Withdrawal: Establishes the process for service subscription, assigning up to 50 group IDs per subscriber, and describes the conditions under which VGCS can be withdrawn.
• Interaction with Other GSM Services: Details interoperability and restrictions with common GSM services such as Call Forwarding, Call Waiting, Multi-party Service, Short Message Service (SMS), and identification features (CLIP, COLP).
• Priority and Pre-emption: Incorporates support for enhanced Multi-Level Precedence and Pre-emption service (eMLPP) as defined in GSM 02.67, enabling prioritization and emergency call handling.

Applications

Voice Group Call Service (VGCS) is vital for scenarios where coordinated voice communication among mobile users is necessary. Key practical applications include:

• Railway Operations: Enabling communication between train drivers, controllers, and dispatchers for safety and coordination.
• Public Safety and Emergency Services: Supporting police, fire, and emergency medical teams in real-time group coordination during incidents.
• Industrial and Utility Sector: Facilitating operations for field crews, maintenance teams, and dispatch centers to ensure efficient service delivery.
• Transport and Logistics: Centralizes communication for convoy operations or fleet management, ensuring all parties receive vital information instantly.
• Event Management and Security: Allows for efficient group instructions and updates to various personnel within a specified area.

By integrating VGCS, organizations benefit from improved communication efficiency, reduced operational risks, and enhanced group coordination within GSM networks.

Related Standards

• GSM 01.04: Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms. Defines terminology used throughout GSM standards.
• GSM 02.67: Enhanced Multi-Level Precedence and Pre-emption Service (eMLPP) - Stage 1. Covers priority and pre-emption functionalities that VGCS supports.
• GSM 02.90: General aspects of GSM services, which provides context for supplementary and teleservices.
• EN 301 511: Global System for Mobile communications (GSM); Harmonized standard for mobile terminals.
• SIST EN 301 515: Further standards for GSM network and service interoperability.

SIST EN 300 925 V6.0.1:2003 is a foundational document for implementing VGCS in GSM networks, supporting robust, scalable, and priority-based group voice communication-critical for major industries where collective coordination through mobile platforms is essential. For organizations deploying GSM-based group communications, adherence to this standard ensures compatibility, reliability, and interoperability within the European and global GSM ecosystem.

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.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail] copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: [e-mail] 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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