The radio hardware can send at 250kb/s and indeed every packet is being sent at that speed, however your throughput over time between two motes cannot be that high (time spent in backoff, loading buffers, time in the application code, etc).
The most I have ever managed to get out of tinyos-1.x was approaching 80kb/s and that was doing nothing else other than sending. Not only that, but the tos1 cc2420 stack can source packets faster than it can receive them (though my experience was using the maximum MTU), and I have, anecdotally read similar things on this mailing list. On 19/04/07, Michael Schippling <[EMAIL PROTECTED]> wrote:
If the destination is the pc you may be limited by the serial port speed. There are some instructions for changing that speed, someplace... I probably have a link, but searching the list might find it. In my testing at: http://www.etantdonnes.com/Motes/report_micaz/ I may have made that same mistake, and got about the same results as you. MS Jeong Kwanhee wrote: > Hello all, > > > > Currently, I'm testing performance using micaz. > > I'm doing using surge program and I manipulated data size, pps(packet > per sec). > > I sent 190kbps from source to destination(1hop), but I gained only > 57kbps to destination. > > I don't know why this happening is. I think micaz hardward specification > is appeared 250kbps. > > > > What am I doing about this happening?? > > Anybody help me. > > > ------------------------------------------------------------------------ > > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@Millennium.Berkeley.EDU > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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