It's a tough problem. RF waves travel 300 meters in a microsecond. This is typically more than the communication range of the motes. TEP132/133 prescribes millisecond precision timestampint. The best timestamping precision you can hope for is 2-3 microseconds on average, but you need to hack the radio stack code in order to achieve that. Then, there's the jitter (look at the FTSP paper by Miklos Maroti et al. for a list of different sources of jitter).
Janos On Fri, Feb 27, 2009 at 3:41 PM, Islam Mohamad Ameen Al Jarrah <g00022...@aus.edu> wrote: > Dear All, > > I need to send a packet from one mote to another with a time stamp where it > will be used to calculate the distance between the two motes, and need to > send an acknowledgment back to the source also with a time stamp! Can any > one help me with this? > > Regards, > > Islam > > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
