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

Mariam Musavi mariam.musvi at gmail.com
Tue Mar 29 09:17:03 EDT 2016

Hi Marcus!

I am really sorry that i couldn't elucidate my problem clearly to the USRP
community, i agree with the point that USRP only knows the language of
waveform. My problem is i simulate a noise to provide to USRP node. Since i
feed that simulated noise to USRP, it will response to that noise resulting
(lower SNR), providing less throughput. i basically want to measure the
throughput of each node while sending (video data) waveform in the presence
of simulated noise. Is there any block in GRC/USRP which can measure
the throughput in hop-to-hop manner of each node from USRP source to USRP

Let me know Marcus if the problem is still unclear!


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

> 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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