SIST EN 300 925 V7.0.2:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service (VGCS) - Stage 1 (GSM 02.68 version 7.0.2 Release 1998)
- Abstract
Upgrade to Release 1998
- 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 V7.0.2:2003 is the Slovenian adoption of ETSI EN 300 925 Version 7.0.2 for GSM Phase 2+ Release 1998. It specifies the Stage 1 description of the Voice Group Call Service (VGCS) in the Global System for Mobile communications (GSM), covering how the service is offered, set up, used and released. The standard is written for service providers, network operators and implementers who need the service rules at the requirement level.
What does SIST EN 300 925 V7.0.2:2003 specify?
SIST EN 300 925 V7.0.2:2003 specifies a GSM teleservice that lets a predefined group of subscribers have speech conversations in half duplex mode over the radio link. It is written from the user and service subscriber point of view, so it focuses on service behavior rather than handset user interface details.
The scope covers:
- normal operation and successful call setup
- exceptional procedures and failed attempts
- interaction with other GSM services and features
The standard applies to mobile stations in a network and area that have the technical capability and a subscription for VGCS. It also states that normal GSM Phase 2 mobile stations are not assumed to support the service.
The document is organized into clauses on scope, references, definitions and abbreviations, service description, normal operation, exceptional procedures, interaction with other GSM services, and interworking considerations. Annex A is informative and gives the status history of Technical Specification GSM 02.68.
What are the key requirements of SIST EN 300 925 V7.0.2:2003?
SIST EN 300 925 V7.0.2:2003 defines how VGCS is provisioned, set up, controlled and combined with other GSM features. For a network operator or service provider, the important point is that the service depends on predefined group data in the network and on specific call-control behavior.
Clause 4 defines VGCS as a group speech service in half duplex mode. Only one service subscriber can talk at a time, while up to five dispatchers can talk simultaneously. In practice, this means the network must manage floor control and mix the received voices for listeners.
Clauses 5.1 and 5.3 cover provisioning and network configuration. A subscriber is assigned group IDs, with no more than 50 group IDs per subscription, and the network stores the group call area, dispatcher identities, the group call reference and optional acknowledgement routing. This matters because VGCS is not a generic call - it depends on pre-registered service data.
Clause 5.4 describes call establishment. A subscriber or dispatcher starts the service by dialing a short code or address, and the network then establishes the group call and informs the caller that speaking can begin. This means implementations must support fast setup and clear network indications.
Clause 4 and subclause 5.4 define talker handling and timing. Service subscribers request the right to talk, while dispatchers can talk immediately, and under normal conditions uplink assignment happens in less than 300 ms after a request to talk. The network also requests the talker's IMSI for event records, so charging and logging systems must capture that information.
Clause 5.5 and clause 6 cover charging and failure handling. Event data may be recorded as a network option, including talker identities, active time and cell resources used, and unsuccessful setup must return an appropriate indication or rejection. In practice, operators need charging records and clear user feedback when the service cannot be provided.
Clause 4(k) and 5.1 cover roaming and group-ID control. VGCS can work in roaming through supra-PLMN group IDs, which must be coordinated between operators and known in the network and SIM. This affects roaming agreements and SIM/network provisioning.
Clause 7 explains interaction with other GSM services. Some services apply differently to service subscribers and dispatchers, and several are not applicable to service subscribers, including SMS, CW and HOLD. The clause also covers CLIP, CLIR, COLP, COLR, call forwarding, barring, ECT, eMLPP and ODB, so implementers must check how VGCS behaves alongside each of these features.
What terms does SIST EN 300 925 V7.0.2:2003 define?
- Voice Group Call Service (VGCS) - the GSM service that lets a predefined group have a speech conversation in half duplex mode.
- Service subscriber - a mobile subscriber who subscribes to VGCS.
- Dispatcher - a predefined fixed-line or mobile user who can receive all voice group calls for a group ID and can also start them.
- Group ID - the numerical identifier used to classify and address a group call.
- Group call area - the predefined cell or cluster of cells where a particular voice group call is distributed.
- Network operator - the entity that provides the network operating elements and resources needed to run VGCS.
- Service provider - the entity that offers VGCS for subscription.
Who uses SIST EN 300 925 V7.0.2:2003?
SIST EN 300 925 V7.0.2:2003 is used by GSM network operators, service providers and system integrators who configure group IDs, call areas and dispatcher identities. It is also used by engineers working on call control, roaming, charging, priority handling and supplementary-service interactions.
Quality managers and buyers can use it to check whether a GSM solution supports group-call service behavior at the service-description level. It is especially relevant where dispatcher-led or safety-related group communication is needed, because the standard includes priority, pre-emption and acknowledgement options.
What changed in SIST EN 300 925 V7.0.2:2003 from the previous edition?
The document is an upgrade to Release 1998 and is published as Version 7.0.2. The foreword states that Version 7.x.y is used for GSM Phase 2+ Release 1998, with x for substantive changes and y for editorial ones, and Annex A records the history of GSM 02.68 up to the August 2000 publication version.
Which standards are used with SIST EN 300 925 V7.0.2:2003?
- GSM 01.04 - provides the abbreviations and acronyms used in the document.
- GSM 02.67 - gives the stage 1 description of enhanced Multi-Level Precedence and Pre-emption service (eMLPP), which VGCS uses for priority and pre-emption behavior.
For this Release 1998 document, references to GSM documents are to the Release 1998 versions.
What does the SIST EN 300 925 V7.0.2:2003 document contain?
The document contains the service scope, references, definitions, service description, normal operation, exceptional procedures, interworking and an informative history annex. Clause 4 includes the logical concept of VGCS, and clause 7 gives detailed interactions with CLIP, CLIR, COLP, COLR, forwarding, call waiting, call hold, MPTY, CUG, AoC, barring services, ECT, eMLPP, SMS and ODB.
For implementation work, the most useful parts are the setup rules, floor-control behavior, roaming rules, charging information, and the service interactions that affect call handling in real networks.
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Frequently Asked Questions
SIST EN 300 925 V7.0.2:2003 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 7.0.2 Release 1998)". This standard covers: Upgrade to Release 1998
Upgrade to Release 1998
SIST EN 300 925 V7.0.2:2003 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 V7.0.2:2003 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 V7.0.2:2003 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)
SLOVENSKI STANDARD
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHP ID]D ±6WRULWHYJRYRUQHJD
VNXSLQVNHJDNOLFD 9*&6 ±6WRSQMD *60UD]OLþLFDL]GDMD
Digital cellular telecommunications system (Phase 2+) (GSM); Voice Group Call Service
(VGCS) - Stage 1 (GSM 02.68 version 7.0.2 Release 1998)
Ta slovenski standard je istoveten z: EN 300 925 Version 7.0.2
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
European Standard (Telecommunications series)
Digital cellular telecommunications system (Phase 2+);
Voice Group Call Service (VGCS) - Stage 1
(GSM 02.68 version 7.0.2 Release 1998)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
2 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
Reference
REN/SMG-010268Q7
Keywords
Digital cellular telecommunications system,
Global System for Mobile communications (GSM)
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No part may be reproduced except as authorized by written permission.
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© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI
3 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope .5
2 References .5
3 Definitions and abbreviations.6
3.1 Definitions.6
3.2 Abbreviations .6
4 Description .6
5 Normal operation with successful outcome .9
5.1 Provision .9
5.2 Withdrawal .10
5.3 Network related service configuration .10
5.4 Normal operation for voice group call establishment.10
5.5 Charging requirements .10
6 Exceptional procedures or unsuccessful outcome.10
7 Interaction with other GSM services.11
7.1 Calling Line Identification Presentation (CLIP).11
7.2 Calling Line Identification Restriction (CLIR) .11
7.3 Connected Line Identification Presentation (COLP).11
7.4 Connected Line Identification Restriction (COLR) .11
7.5 Call Forwarding Unconditional (CFU).11
7.6 Call Forwarding on mobile subscriber Busy (CFB) .11
7.7 Call Forwarding on No Reply (CFNRy) .11
7.8 Call Forwarding on mobile subscriber Not Reachable (CFNRc) .11
7.9 Call Waiting (CW) .12
7.10 Call Hold (HOLD).12
7.11 Multi-party Service (MPTY).12
7.12 Closed User Group (CUG) .12
7.13 Advice of Charge (AoC) .12
7.14 Barring of All Outgoing Calls (BAOC) .12
7.15 Barring of Outgoing International Calls (BOIC).12
7.16 Barring of Outgoing International Calls except those to the Home PLMN country (BOIC-exHC).12
7.17 Barring of All Incoming Calls (BAIC).12
7.18 Barring of Incoming Calls when Roaming outside the home PLMN country (BIC-Roam).13
7.19 Explicit Call Transfer (ECT).13
7.20 Enhanced Multi-Level Precedence and Pre-emption service (eMLPP).13
7.21 Short Message Service (SMS).13
7.22 Operator Determined Barring (ODB).13
8 Interworking considerations.13
Annex A (informative): Status of Technical Specification GSM 02.68.14
History .15
ETSI
4 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI 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 guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Special Mobile
Group (SMG).
The present document specifies the stage one description of the Voice Group Call Service (VGCS) within the digital
cellular telecommunications system.
The contents of the present document may be subject to continuing work within SMG and may change following formal
SMG approval. Should SMG modify the contents of the present document it will then be re-submitted for formal
approval procedures by ETSI with an identifying change of release date and an increase in version number as follows:
Version 7.x.y
where:
7 GSM Phase 2+ Release 1998
x the second digit is incremented for changes of substance, i.e. technical enhancements, corrections, updates,
etc.;
y the third digit is incremented when editorial only changes have been incorporated in the specification.
National transposition dates
Date of adoption of this EN: 10 December 1999
Date of latest announcement of this EN (doa): 31 March 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 September 2000
Date of withdrawal of any conflicting National Standard (dow): 30 September 2000
ETSI
5 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
1 Scope
The present document specifies the stage one description of the Voice Group Call Service (VGCS) which allows speech
conversation of a predefined group of service subscribers in half duplex mode on the radio link taking into account
multiple 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 the
corresponding 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 for
this 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 the
appropriate Global System for Mobile Communications (GSM) specifications.
The present document defines a teleservice of the digital cellular telecommunications system GSM. Any interaction
with other services and/or networks not dealt with in clauses 7 or 8 are outside the scope of the present document.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-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 same
number.
• For this Release 1998 document, references to GSM documents are for Release 1998 versions (version 7.x.y).
[1] GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and
acronyms".
[2] GSM 02.67: "Digital cellular telecommunications system (Phase 2+); enhanced Multi-Level
Precedence and Pre-emption service (eMLPP) - Stage 1".
ETSI
6 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
3 Definitions and abbreviations
3.1 Definitions
For 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.
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 defined
in one PLMN depends on the maximum number of group call areas defined in this PLMN. The maximum number of
group IDs and group call areas combined is 10 , 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 shall
receive 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 be
called by their ISDN or MSISDN number, respectively. When dispatchers initiate voice group calls, they shall call a
particular MSISDN number which is related to a group ID and group call area. Dispatchers using the GSM network can
be 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 or
up 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 of
group IDs defined in this PLMN. The maximum number of group IDs and group call areas combined is 10 ,The
composition of a group call area is predefined in the network by the service provider. Changing of cell allocation in the
network due to operational reasons will need an adaptation of the group call area definition. The group call area may
include 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.
3.2 Abbreviations
Abbreviations used in the present document are listed in GSM 01.04.
4 Description
The 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 a
predefined 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.
ETSI
7 ETSI EN 300 925 V7.0.2 (2000-08)
(GSM 02.68 version 7.0.2 Release 1998)
b) The calling subscriber as well as the destination subscribers may be any service subscriber which has subscribed
to the related group ID or any dispatcher who is entitled to it by his identity which shall be registered in the
network.
c) Destination subscribers are all service subscribers or a group of service subscribers identified by the called group
ID which have their present location in the group call area, and pre-registered dispatchers. Destination service
subscribers shall be notified with the group ID, not by paging the subscriber individually. Dispatchers shall be
called individually with their identity.
Service subscribers may become late destination subscribers when entering the group call area within 500 ms
after reception of the first notification message related to the VGCS call. Service subscribers which leave the
corresponding group call area during an on going VGCS call of which they are member cease
...