SIST EN 300 727 V6.0.1:2003

SLOVENSKI STANDARD
SIST EN 300 727 V6.0.1:2003
01-december-2003
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Digital cellular telecommunications system (Phase 2+) (GSM); Substitution and muting of
lost frames for Enhanced Full Rate (EFR) speech traffic channels (GSM 06.61 version
6.0.1 Release 1997)
Ta slovenski standard je istoveten z: EN 300 727 Version 6.0.1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST EN 300 727 V6.0.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 300 727 V6.0.1:2003

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SIST EN 300 727 V6.0.1:2003
EN 300 727
V6.0.1 (1999-06)
European Standard (Telecommunications series)
Digital cellular telecommunications system (Phase 2+);
Substitution and muting of lost frames for Enhanced
Full Rate (EFR) speech traffic channels
(GSM 06.61 version 6.0.1 Release 1997)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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SIST EN 300 727 V6.0.1:2003
(GSM 06.61 version 6.0.1 Release 1997) 2 EN 300 727 V6.0.1 (1999-06)
Reference
DEN/SMG-020661Q6 (6qc0300o.PDF)
Keywords
Digital cellular telecommunications system,
Global System for Mobile communications (GSM)
ETSI
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Copyright Notification
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The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1999.
All rights reserved.
ETSI

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SIST EN 300 727 V6.0.1:2003
(GSM 06.61 version 6.0.1 Release 1997) 3 EN 300 727 V6.0.1 (1999-06)
Contents
Intellectual Property Rights.4
Foreword .4
1 Scope.5
2 References.5
3 Definitions and abbreviations .5
3.1 Definitions . 5
3.2 Abbreviations. 5
4 General.6
5 Requirements .6
5.1 Error detection . 6
5.2 Lost speech frames. 6
5.3 First lost SID frame. 6
5.4 Subsequent lost SID frames . 6
6 Example solution.6
6.1 Example solution for substitution and muting of lost speech frames . 7
6.2 Example solution for substitution and muting of lost SID frames. 9
Annex A (informative): Change Request History .10
History.11
ETSI

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SIST EN 300 727 V6.0.1:2003
(GSM 06.61 version 6.0.1 Release 1997) 4 EN 300 727 V6.0.1 (1999-06)
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 free of charge 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 Standard (Telecommunications series) has been produced by the Special Mobile Group (SMG).
The present document defines a frame substitution and muting procedure which is used by the Receive (RX)
Discontinuous Transmission (DTX) handler when one or more lost speech or Silence Descriptor (SID) frames are
received from the Radio Sub System (RSS) within the digital cellular telecommunications system.
The contents of the present document is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of the present document it will be re-released with an identifying change of
release date and an increase in version number as follows:
Version 6.x.y
where:
6 indicates Release 1997 of GSM Phase 2+
x the second digit is incremented for all 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.
Proposed national transposition dates
Date of adoption of this EN: 05 June 1999
Date of latest announcement of this EN (doa): 30 September 1999
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2000
Date of withdrawal of any conflicting National Standard (dow): 31 March 2000
ETSI

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SIST EN 300 727 V6.0.1:2003
(GSM 06.61 version 6.0.1 Release 1997) 5 EN 300 727 V6.0.1 (1999-06)
1 Scope
The present document defines a frame substitution and muting procedure which shall be used by the Receive (RX)
Discontinuous Transmission (DTX) handler when one or more lost speech or Silence Descriptor (SID) frames are
received from the Radio Sub System (RSS).
The requirements of the present document are mandatory for implementation in all GSM Base Station Systems (BSS)s
and Mobile Stations (MS)s capable of supporting the enhanced Full Rate speech traffic channel. It is not mandatory to
follow the bit exact implementation outlined in the present document and the corresponding C-source code.
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.
[1] GSM 05.03: "Digital cellular telecommunications system (Phase 2+); Channel coding".
[2] GSM 06.60: "Digital cellular telecommunications system (Phase 2+); Enhanced Full Rate (EFR)
speech transcoding".
[3] GSM 06.81: "Digital cellular telecommunications system (Phase 2+); Discontinuous transmission
(DTX) for Enhanced Full Rate (EFR) speech traffic channels".
[4] GSM 08.60: "Digital cellular telecommunications system (Phase 2+); Inband control of remote
transcoders and ra
...