SIST ETS 300 580-5 E1:2003

European digital cellular telecommunications system (Phase 2); Discontinuous Transmission (DTX) for full rate speech traffic channels (GSM 06.31)

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Evropski digitalni celični telekomunikacijski sistem (faza 2) – Nezvezno oddajanje (DTX) po prometnem kanalu s polno hitrostjo govora (GSM 06.31)

General Information

• 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
• Ref Project: ETSI ETS 300 580-5 ed.1 (1994-09) - European digital cellular telecommunications system (Phase 2); Discontinuous Transmission (DTX) for full rate speech traffic channels (GSM 06.31)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 580-5 E1:2003
01-december-2003
(YURSVNLGLJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±1H]YH]QRRGGDMDQMH
'7;SRSURPHWQHPNDQDOXVSROQRKLWURVWMRJRYRUD*60
European digital cellular telecommunications system (Phase 2); Discontinuous
Transmission (DTX) for full rate speech traffic channels (GSM 06.31)
Ta slovenski standard je istoveten z: ETS 300 580-5 Edition 1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 580-5 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 580-5 E1:2003

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SIST ETS 300 580-5 E1:2003
EUROPEAN ETS 300 580-5
TELECOMMUNICATION September 1994
STANDARD
Source: ETSI TC-SMG Reference: GSM 06.31
ICS: 33.060.30
European digital cellular telecommunications system, Global System for Mobile communications
Key words:
(GSM)
European digital cellular telecommunications system (Phase 2);
Discontinuous Transmission (DTX) for full rate
speech traffic channel
(GSM 06.31)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
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 1994. All rights reserved.
New presentation - see History box

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ETS 300 580-5: September 1994 (GSM 06.31 version 4.0.4)
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 Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 580-5: September 1994 (GSM 06.31 version 4.0.4)
Contents
Foreword.5
0.1 Scope .7
0.2 Normative references .7
0.3 Definitions and abbreviations.8
0.3.1 Definition of general terms .8
0.3.2 Definition of terms on the receive side.8
1 General .9
1.1 General organisation .9
1.2 Naming convention .9
2 Transmit side.10
2.1 General operation .10
2.1.1 Functions of the TX DTX handler .10
2.1.2 Functions of the TX radio subsystem .12
3 Receive side.13
3.1 General operation .13
3.1.1 Functions of the RX radio subsystem.14
3.1.2 Functions of the RX DTX handler.14
History.15

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ETS 300 580-5: September 1994 (GSM 06.31 version 4.0.4)
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).
This ETS specifies the Discontinuous Transmission (DTX) for full rate speech traffic channel for the
European digital cellular telecommunications system (Phase 2).
This ETS correspond to GSM technical specification, GSM 06.31 version 4.0.4.
The specification from which this ETS has been derived was originally based on CEPT documentation,
hence the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules.
Reference is made within this ETS to GSM Technical Specifications (GSM-TSs) (NOTE).
NOTE: TC-SMG has produced documents which give the technical specifications for the
implementation of the European digital cellular telecommunications system.
Historically, these documents have been identified as GSM Technical Specifications
(GSM-TS). These TSs may have subsequently become I-ETSs (Phase 1), or ETSs
(Phase 2), whilst others may become ETSI Technical Reports (ETRs). GSM-TSs are,
for editorial reasons, still referred to in GSM ETSs.

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ETS 300 580-5: September 1994 (GSM 06.31 version 4.0.4)
0.1 Scope
This technical specification gives a description of the general baseband operation of full rate speech traffic
channels in the transmitter and in the receiver of GSM Mobile Stations and Base Station Systems during
Discontinuous Transmission (DTX).
For clarity, the description is structured according the block diagrams in figures 2-1 and 3-1. Except in the
case described next, this structure of distributing the various functions between system entities is not
mandatory for implementation, as long as the operation on the air interface and on the speech decoder
output remains the same.
In the case of Base Station Systems where the speech transcoder is located remotely in the Base Station
Controller, the implementation of the interfaces between the DTX Handlers and the Radio Subsystem
(RSS) as described in this technical specification together with all their flags is mandatory, being a part of
the A-bis- interface as described in GSM 08.60. In this case the various flags also serve to avoid
additional delays.
The DTX functions described in this technical specification are mandatory for implementation in all GSM
Mobile Stations. The receiver requirements are mandatory for implementation in all GSM Base Station
Systems, the transmitter requirements only for those where downlink DTX will be used.
DTX shall be in operation in GSM Mobile Stations if commanded so by the network, see GSM 04.08.
0.2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references, the
latest edition of the publication referred to applies.
[1] GSM 01.04 (ETR 100): "European digital cellular telecommunication system
(Phase 2); Definitions, abbreviations and acronyms".
[2] GSM 04.08 (ETS 300 557): "European digital cellular telecommunication system
(Phase 2); Mobile radio interface layer 3 specification".
[3] GSM 05.03 (ETS 300 575): "European digital cellular telecommunication system
(Phase 2); Channel coding".
[4] GSM 05.05 (ETS 300 577): "European digital cellular telecommunication system
(Phase 2); Radio transmission and reception".
[5] GSM 05.08 (ETS 300 578): "European digital cellular telecommunication system
(Phase 2); Radio subsystem link control".
[6] GSM 06.01 (ETS 300 580-1): "European digital cellular telecommunication
system (Phase 2); Full rate speech processing functions".
[7] GSM 06.10 (ETS 300 580-2): "European digital cellular telecommunication
system (Phase 2); Full rate speech transcoding".
[8] GSM 06.11 (ETS 300 580-3): "European digital cellular telecommunication
system (Phase 2); Substitution and muting of lost frames for full rate speech
channels".
[9] GSM 06.12 (ETS 300 580-4): "European digital cellular telecommunication
system (Phase 2); Comfort noise aspect for full rate speech traffic channels".
[10] GSM 06.32 (ETS 300 580-6): "European digital cellular telecommunication
system (Phase 2); Voice Activity Detection (VAD)".

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[11] GSM 08.60 (ETS 300 597): "European digital cellular telecommunication system
(Phase 2); Inband control of remote transcoders and rate adaptors".
0.3 Definitions and abbreviations
In addition to those below the definitions and abbreviations used in this specification are listed in GSM
01.04.
0.3.1 Definition of general terms
Frame: Time interval of 20 msec. corresponding to the time segmentation of
the full rate speech transcoder (GSM 06.10), also used as a short term
for a traffic frame.
Traffic frame: Block of 260 information bits (see GSM 05.03) transmitted on the full
rate speech traffic channel.
(SID) Silence Descriptor frame: Frame characterized by the SID code word. It conveys information on
the acoustic background noise.
SID code word: Fixed bit pattern defined in GSM 06.12, for labelling a traffic frame as
a SID frame.
SID field: The bit positions defined in GSM 06.12, of the SID codeword within a
SID frame.
Speech frame: Traffic frame that cannot be classified as a SID frame.
0.3.2 Definition of terms on the receive side
Bad traffic frame: A traffic frame flagged BFI=1 (Bad Frame Indication) by the Radio Subsystem.
Good traffic frame: A traffic frame flagged BFI=0 by the Radio Subsystem.
Good speech frame: A good traffic frame which is not an accepted SID frame.
Accepted SID frame: Traffic frame in which the SID field deviates in less than 16 bit positions from the
SID code word (flag SID=2 or SID=1).
Valid SID frame: Good traffic frame in which the SID field deviates in less than 2 bit positions
from the SID code word (flag SID=2). This frame is valid for updating of comfort
noise parameters at any time.
Invalid SID frame: Accepted SID frame with BFI=1, or accepted SID frame with BFI=0, in which the
SID field deviates in more than 1 bit position from the SID code word (flag
SID=1). This fram
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