Structure of traffic data in burst_ind messages

Bhaskar11 niceguy108 at gmail.com
Tue Feb 12 13:37:58 UTC 2013


You can know if it is DTX by checking for SID messages before it drops and
before it resumes. A simple way to check if it is DTX  is to watch SNR
level during speech/pause.

If you are *not* using AMR, then you can check signal strength only for the
mandatory frames which are listed in TS 05.08 / 8.3.

FACCH specs will be in TS 05.03. But AFAIK it will not help for this
purpose.

You cannot Google these things. You will have to read the specs from
the 3GPP website http://www.3gpp.org/specification-numbering

B


On Tue, Feb 12, 2013 at 5:46 PM, Pe <oxccoxcc at yandex.ru> wrote:

> Hi, Bhaskar
> I have the same problem with periodical channel dropping from snr 255 to
> snr
> less then 10. It is not because of DTX, as i think. May be it is because of
> handovers, but dropping is too often.
> I did not use FACCH information yet.
> Can you get a reference to document with facch decoding scheme? google
> didnt
> help.
>
>
>
> --
> View this message in context:
> http://baseband-devel.722152.n3.nabble.com/Structure-of-traffic-data-in-burst-ind-messages-tp4025762p4025826.html
> Sent from the baseband-devel mailing list archive at Nabble.com.
>
>
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