Reference Manual

Discontinuous Transmission
30 Discontinuous Transmission
"Discontinuous Transmission" is a mechanism which allows the radio
transmitter to be switched off during speech or data (non-transparent)
pauses.
The following benefits are achieved:
•
Power is saved in the MS uplink
• The overall interference level on the air is reduced
• Reduced RBS power consumption downlink
The RBS supports downlink DTX (Discontinuous Transmission) as well
as uplink DTX.
30.1 References
/GSM:04.06/ GSM 04.06 (phase 2) version 4.1.0
/GSM:04.21/ GSM 04.21 (phase 2) version 4.2.1
/GSM:05.02/ GSM 05.02 (phase 2) version 4.3.0
/GSM:05.08/ GSM 05.08 (phase 2) version 4.6.0
/GSM:06.12/ GSM 06.12 (phase 2) version 4.0.1
/GSM:06.22/ GSM 06.22 (phase 2) version 4.0.0
/GSM:06.31/ GSM 06.31 (phase 2) version 4.0.0
/GSM:06.32/ GSM 06.32 (phase 2) version 4.0.1
/GSM:06.41/ GSM 06.41 (phase 2) version 4.0.0
/GSM:06.42/ GSM 06.42 (phase 2) version 4.0.0
/GSM:06.81/ GSM 06.81 (phase 2) (t.b.d)
/GSM:08.20/ GSM 08.20 (phase 2) version 4.1.0
Whenever a reference is made to a function described in another chapter,
please refer to the table of contents to find the appropriate chapter.
30.2 Functions
30.2.1 DTX Downlink
The DTX function is described in:
/GSM:06.12/ Comfort Noise Aspects
/GSM:06.22/ Comfort Noise Aspects (half rate speech)
/GSM:06.31/ Overall DTX Operation (full rate speech)
/GSM:06.32/ Voice Activity Detection (full rate speech)
/GSM:06.41/ Overall DTX Operation (half rate speech)
EN/LZT 720 0008 P2A
2001-11-28
285 (485)
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