> Chonggang Wang wrote: > > Yes. Baud rate is bit per second. I set 115200 (115.2 Kbps) in my > experiment. > > I got 35 Kbps (bit per second) throughput at receiver side. > > since 35 is far smaller than 115.2, the bottleneck is not the > serial > port, it is in air-interface. > The MAC in the mote that outputs to serial knows the serial rate is > 115Kbps, so that could be affecting what it attempts. In that case, the mote should use the rate (close to baud rate - 115.2 K) to forward data to the serial port.
> > collisions get retried by the radio-stack and MAC code... So like > Phil In this experiment, traffic is one-way and there is no collision. > says, backoff explains it, and it is backoff from collisions > related to > 115kbps top speed....I bet... I calculated the backoff time and it seems that backoff time is that too much to reduce rate heavily. I am still confused by the 35 Kbps throughput. Thanks, Chonggang > John Griessen > > Ecosensory ecosensory.com > Austin Texas > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://mail.millennium.berkeley.edu/cgi- > bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
