Re: [Discuss-gnuradio] MAC layer development and USRP2

[Veljko Pejovic]

I tried with a stop-and-wait ARQ and two USRP2s with XCVR2450s, but
the delay was too long and inconsistent. I can't remember the exact
figures, but definitely up to milliseconds.

Veljko

2010/4/6 George Nychis <address@hidden>:
>
>
> On Tue, Apr 6, 2010 at 10:07 AM, Charles Irick <address@hidden> wrote:
>>
>> Thanks for the reply George. I'm still looking for a little more
>> information on this topic.
>>
>> - What is PMT
>
> http://gnuradio.org/redmine/wiki/1/TypePMT
>
>>
>> - Why was m-block removed
>
> http://osdir.com/ml/discuss-gnuradio-gnu/2010-01/msg00066.html
>
>>
>> - Has anyone measured latency with the USRP2 and GigE
>
> I'm not sure.
>
>>
>> - Is GigE alone not capable of handling MAC turnaround times or is
>> software to blame for this
>
> I think the latency is on hundreds of microseconds, which is greater than,
> say, an 802.11 ACK turnaround time (24us).
>
>>
>> - Is the scheduler the main issue in the way it handles i/o between blocks
>
>  There are some details of this in the second link I gave.
>
> - George
>
>
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