[USRP-users] How to calculate packets live from USRPN200 hardware

Mariam Musavi mariam.musvi at gmail.com
Tue Mar 29 09:10:12 EDT 2016


Hi Marcus!I am sorry that i couldn't elucidate my problem clear, i agree
with the point that USRP only knows the language of waveform,

On Tue, Mar 29, 2016 at 6:01 PM, Marcus Müller <marcus.mueller at ettus.com>
wrote:

> Mariam,
>
> the point still is that the USRP really doesn't know (and care) what your
> samples mean. To the USRP, these are just relative voltage values.
> The fact that it's data is up to your software's interpretation of these
> values; you can't transmit "bits" over the air, but you can transmit a
> waveform that can be interpreted as such.
>
> So, a USRP can't forward "data"; it just receives RF signal, makes a
> digital signal out of it, gives that to a PC, which might then do something
> with that, eg. take the same digital numbers and give it to a USRP to make
> a TX signal out of it.
>
> I'm having a bit of a hard time understanding in what kind of "deadlock"
> you are. That is probably because I don't understand you correctly; could
> you explain your problem?
>
> Best regards,
> Marcus
>
>
> On 29.03.2016 14:40, Mariam Musavi wrote:
>
> video data packets.
>
> On Tue, Mar 29, 2016 at 4:17 PM, Marcus Müller <marcus.mueller at ettus.com>
> wrote:
>
>> Hi Mariam,
>>
>> what packets are you referring to?
>>
>> Best regards,
>> Marcus
>>
>>
>> On 29.03.2016 12:06, Mariam Musavi wrote:
>>
>> Greetings!
>>
>> All users,
>>
>> I am working on USRP Network series N200, and i am stuck up in the
>> deadlock to calculate packets sent/received during transmission from USRP
>> node. There are two cases:
>>
>> 1. Calculate packets offline (end-to-end): if i want to calculate
>> end-to-end packet delivery, i used third-party Network Analyzer software.
>>
>> 2. Calculate packets online: (hop-to-hop) but since i want to calculate
>> real-time packets sent/received from USRP source node to USRP destination
>> node.
>>
>> For instance, the network scenario is described as setting up three
>> USRPs that are connected to a computer through ethernet switch. USRP source
>> node forwards data packets (or video) to second USRP (i.e., relay node) and
>> finally the second USRP  forwards the data packets to USRP destination
>> node. For transmission of packets i use a video file.
>>
>> Looking forward for help. Thanks.
>>
>>
>>
>
>


-- 
Syed Mariam
Graduate Research Assistant
Sunway University (Malaysia) & Lancaster University
(UK) joint program.
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