Re: [Discuss-gnuradio] is ethernet protocol usrp use reliable to transmi
Re: [Discuss-gnuradio] is ethernet protocol usrp use reliable to transmit data?
Tue, 16 Aug 2011 22:03:58 -0700
On Tue, Aug 16, 2011 at 8:38 PM, Marcus D. Leech <address@hidden> wrote:
On 08/16/2011 11:32 PM, Page Jack wrote:
my USRP N200 sometimes receive data wrong, I don't know
where is the problem in my application or
in hardware? So I wonder what ethernet protocol does usrp use and is it
reliable to transmit data?
Do you mean samples are received incorrectly, or your high-level data
packets are received incorrectly.
The transport protocol used is based on UDP, which has no inherent
error-recovery mechanism, but
when carried over a local ethernet connection, should have a
vanishingly-tiny error rate. Vastly more
likely that UHD-level UDP packets will get dropped due to buffer
resource issues than actual data
errors on the packets.
Keep in mind that what UHD "carries" is just samples of an analog
phenomenon. While it carries those
samples quite faithfully, the samples themselves may be distorted in
many different ways that affect