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ÖNORM EN 301707 V 7.4.1:2001-02
Digital cellular telecommunications system (Phase 2+) - Discontinuous Transmission (DTX) for Adaptive Multi-Rate (AMR) speech traffic channels (GSM 06.93 version 7.4.1 Release 1998)
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Разработчик:
Зарубежные/ON
ICS:
33.070.50 Global System for Mobile Communication (GSM) / Глобальная система мобильной связи (GSM)
Описание
The present document gives a description of the general baseband operation of Adaptive Multi-Rate speech traffic
channels in the transmitter and in the receiver of GSM Mobile Stations (MS)s and Base Station Systems (BSS)s during
Discontinuous Transmission (DTX).
For clarity, the description is structured according to the block diagrams in figures 1 and 3. 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 BSSs where the speech transcoder is located remote from the Base Transceiver Station (BTS), the
implementation of the interfaces between the DTX handlers and the Radio Sub System (RSS) as described in the
present document together with all their flags is mandatory, being part of the A-bis interface as described in GSM 08.60
and GSM 08.61.
The DTX functions described in this technical specification are mandatory for implementation in the GSM MSs. The
receiver requirements are mandatory for implementation in all GSM BSSs, the transmitter requirements only for those
where downlink DTX or Tandem Free Operation will be used.
Ключевые слова:
Telekommunikation, Fernmeldetechnik, Nachrichtentechnik, Kommunikationstechnologie, Informationsverarbeitung, Phase 2+, DTX, Unterbrechung, Übertragung, AMR, Sprache, Sprechkanal, GSM, Mobilfunk, Sprachübertragung, digital