[arm-allstar] Portable Node Excessive Data Usage

[Justin Reed]

Count me in as somebody extremely interested in AMBE transport and transcoding via Allstar. This could be the ideal interoperability solution.

Regards,
Justin

> On Jul 2, 2017, at 2:27 PM, David McGough via arm-allstar <arm-allstar at hamvoip.org> wrote:
> 
> 
> 
> Frank,
> 
> If you're using the uLAW CODEC, 400mb of bandwidth is about 12 hours of 
> one-way audio. The way I came up with that number is from calculations 
> based on real, measured bandwidth use. Here is the calculation:
> 
> (400 megabytes of data)
> / (0.0094 megabytes per second for uLAW)
> = (42553 seconds of audio)
> / (3600 seconds per hour)
> = (11.8 hours of audio)
> 
> As mentioned in a message from last year 
> (http://lists.hamvoip.org/pipermail/arm-allstar/2016-August/003563.html ), 
> the actual measured bandwidth requirements for several common CODECs are:
> 
> (All results in Kbytes-per-second for an actual IAX2 UDP data stream)
> 
> ULAW    9.4
> G726    5.5
> iLBC    3.5
> GSM    3.2
> 
> 
> ....Now I have more CODECs to add to that list, which will be added to our
> codebase soon (again in Kbytes/s):
> 
> In beta test:
> CODEC2(3.2kbit)    2.0
> 
> In pre-alpha test:
> AMBE+2(2.0kbit)    1.6
> 
> Note that AMBE+2 will require external hardware. The CODEC2 audio quality 
> is definitely "digital" sounding. And, AMBE+2 sounds like DMR, etc. 
> 
> 
> 73, David KB4FXC
> 
> 
> 
>> On Sun, 2 Jul 2017, "Frank McKibben via arm-allstar" wrote:
>> 
>> I have been working on an Allstar project to set up a portable node in my
>> RV.  I have been testing with  a Verizon 4G hotspot for connectivity.  The
>> node seems to be working fine except for one issue that I am trying to wrap
>> my arms around.  The only device that I  have connected to the hotspot is
>> the Raspberry Pi Allstar node so I could get some measure of the data usage.
>> I connected the node to our local repeater system via a hub that the club
>> has dedicated to AllStar connectivity.  Our local repeater is in a rural
>> area of Colorado and not what I would characterize as an overly busy
>> repeater.
>> 
>> 
>> 
>> Over a two day period my hotspot consumed about 400mb of data which seemed
>> like a lot to me.  I was expecting that the data usage would be pretty
>> efficient with just the AllStar node using the hotspot and was surprised by
>> my seemingly high usage.   Since I'm new to the portable node world I
>> thought Id get some input from other users to see if this is a normal data
>> usage rate.  Are there some background processes taking place that could be
>> consuming data?  If so can they be turned off or scaled back ?  
>> 
>> 
>> 
>> N0AFO
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> 
>> arm-allstar mailing list
>> arm-allstar at hamvoip.org
>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
>> 
>> Visit the BBB and RPi2/3 web page - http://hamvoip.org
>> 
> 
> _______________________________________________
> 
> arm-allstar mailing list
> arm-allstar at hamvoip.org
> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> 
> Visit the BBB and RPi2/3 web page - http://hamvoip.org