ETSI ETS 300 924 ed.3 (1999-12)

SLOVENSKI STANDARD
SIST ETS 300 924 E3:2003
01-december-2003
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Digital cellular telecommunications system (Phase 2+) (GSM); enhanced Multi-Level
Precedence and Pre-emption service (eMLPP) - Stage 1 (GSM 02.67 version 5.1.1
Release 1996)
Ta slovenski standard je istoveten z: ETS 300 924 Edition 3
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 924 E3:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 924 E3:2003
EUROPEAN ETS 300 924
TELECOMMUNICATION December 1999
STANDARD Third Edition
Source: SMG Reference: RE/SMG-010267QR2
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system (Phase 2+);
enhanced Multi-Level Precedence and Pre-emption service
(eMLPP) - Stage 1
(GSM 02.67 version 5.1.1 Release 1996)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.org
Tel.:+33492944200- Fax:+33493654716
Copyright Notification: No 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.

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ETS 300 924 (GSM 02.67 version 5.1.1 Release 1996): December 1999
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Standards Making Support Dept." at the address shown on the title page.

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ETS 300 924 (GSM 02.67 version 5.1.1 Release 1996): December 1999
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope .7
2 Normative References.7
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .8
4 Description.8
4.1 Applicability to telecommunication services.11
5 Normal operation with successful outcome.11
5.1 Provision .11
5.2 Withdrawal .11
5.3 Registration.11
5.4 Erasure .11
5.5 Network related service configuration.12
5.6 Activation.12
5.7 Deactivation .12
5.8 Invocation.12
5.9 Normal operation .12
5.10 Interrogation.12
5.11 Charging requirements .12
6 Exceptional procedures or unsuccessful outcome.13
7 Alternate procedures .13
8 Interaction with other supplementary services .13
8.1 Calling Line Identification Presentation (CLIP).13
8.2 Calling Line Identification Restriction (CLIR) .13
8.3 Connected Line Identification Presentation (COLP) .13
8.4 Connected Line Identification Restriction (COLR) .13
8.5 Call Forwarding Unconditional (CFU) .13
8.6 Call Forwarding on mobile subscriber busy (CFB) .13
8.7 Call Forwarding on No Reply (CFNRy) .13
8.8 Call Forwarding on mobile subscriber Not Reachable (CFNRc) .13
8.9 Call Waiting (CW) .14
8.10 Call Hold.14
8.11 Multi-party Service (MPTY).14
8.12 Closed User Group (CUG).14
8.13 Advice of Charge (AoC) .14
8.14 Barring of Outgoing Calls (BAOC) .14
8.15 Barring of Outgoing International Calls (BOIC).14
8.16 Barring of Outgoing International Calls except those to the Home PLMN country
(BOIC-exHC).14
8.17 Barring of All Incoming Calls (BAIC).14
8.18 Barring of Incoming Calls when Roaming outside the home PLMN country (BIC-Roam).14
8.19 Call Transfer (ECT).14
9 Interworking considerations.15
Annex A (informative): Status of Technical Specification GSM 02.67 .16
History.17

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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 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 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 Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the stage 1 description of the enhanced Multi-Level Precedence and Pre-emption
Service (eMLPP) within the digital cellular telecommunications system.
The contents of this standard may be subject to continuing work within SMG and may change following
formal SMG approval. Should SMG modify the contents of this standard 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 5.x.y
where:
5 GSM Phase 2+ Release 1996;
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.
Transposition dates
Date of adoption of this ETS: 17 December 1999
Date of latest announcement of this ETS (doa): 31 March 2000
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 September 2000
Date of withdrawal of any conflicting National Standard (dow): 30 September 2000

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1 Scope
This European Telecommunication Standard (ETS) specifies the stage 1 description of the enhanced
Multi-Level Precedence and Pre-emption Service (eMLPP). This service has two parts: precedence and
pre-emption. Precedence involves assigning a priority level to a call in combination with fast call set-up.
Pre-emption involves the seizing of resources, which are in use by a call of a lower precedence, by a
higher level precedence call in the absence of idle resources. Pre-emption can also involve the
disconnection of an on-going call of lower precedence to accept an incoming call of higher precedence.
The eMLPP service is provided as a network operator's option to a domain of a network. The domain can
be the whole network or a subset of the network. The eMLPP service applies to all network resources in
the domain that is in common use. The eMLPP service is applicable to all mobile stations in the domain
with all or some mobile stations having a respective subscription assigning precedence according to the
eMLPP service.
eMLPP is a supplementary service and shall be provided to a subscriber for all basic services subscribed
to and for which eMLPP applies.
NOTE: It is under study whether 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.
This ETS does not deal with the Man-Machine Interface (MMI) requirements, but makes reference to the
appropriate Global System for Mobile communications (GSM) specifications.
This ETS is applicable to teleservices 1x and 6x and to all bearer services used in a mobile network
according to the digital cellular telecommunications system GSM if eMLPP is provided. Any interaction
with other services and/or networks not dealt with in clauses 8 or 9 are outside the scope of this ETS.
2 Normative 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 1996 document, references to GSM documents are for Release 1996 versions
(version 5.x.y).
[1] GSM 01.04: "Digital cellular telecommunications system (Phase 2+);
Abbreviations and acronyms".
[2] GSM 02.04: "Digital cellular telecommunications system (Phase 2+); General on
supplementary services".
[3] GSM 02.24: "Digital cellular telecommunications system; Description of Charge
Advice Information (CAI)".

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[4] GSM 02.40: "Digital cellular telecommunications system; Procedures for call
progress indications".
[5] GSM 02.68: "Digital cellular telecommunications system (Phase 2+); Voice
Group Call Service (VGCS) - Stage 1".
[6] GSM 02.69: "Digital cellular telecommunications system (Phase 2+); Voice
Broadcast Service (VBS) - Stage 1".
[7] GSM 03.05: "Digital cellular telecommunications system; Technical performance
objectives".
[8] GSM 03.68: "Digital cellular telecommunications system (Phase 2+); Voice
Group Call Service (VGCS) - Stage 2".
[9] GSM 03.69: "Digital cellular telecommunications system (Phase 2+); Voice
Broadcast Service (VBS) - Stage 2".
[10] ITU-T Recommendation I.255.3: "ISDN Multi-Level Precedence and
Pre-emption (MLPP) stage 1".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
calling subscriber: Service subscriber which invokes the eMLPP service.
network operator: Entity which provides the network operating elements and resources for the execution
of the enhanced Multi-Level Precedence and Pre-emption service (eMLPP).
precedence: Precedence is the priority associated with a call.
service provider: Entity which offers the eMLPP service for subscription. The network operator may be
the service provider.
service subscriber: Mobile subscriber which subscribes to the eMLPP service. In principle, if a network
provides eMLPP service, all users are able to subscribe to this service.
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply, in addition to those listed in GSM 01.04:
eMLPP enhanced Multi-Level Precedence and Pre-emption
4 Description
a) 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.
eMLPP shall be applicable also in case of roaming if supported by the related networks.
The maximum precedence level of a subscriber is set at the subscription time by the service
provider, based on the subscriber's need. The subscriber may select a precedence level up to and
including the maximum precedence level subscribed to, on a per call basis.

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There are at maximum 7 priority levels. The two highest levels are reserved for network internal
use, e.g. for emergency calls or the network related service configurations for specific voice
broadcast or voice group call services. These two levels can only be used locally, i.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 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 (highest, for network internal use).
B (for network internal use).
0 (for subscription).
1 (for subscription).
2 (for subscription).
3 (for subscription).
4 (lowest, for subscription).
Levels A and B shall be mapped to level 0 for priority treatment outside of the MSC area in which
they are applied.
b) Priorities shall be treated in the network as defined for the following call scenarios:
- Mobile originated calls:
-
...