No, what Jinkyu tires to do is to evaluate the precision of FTSP over a whole network. One possibility would be to have your beacon node use a power amplifier like this one:
http://focus.ti.com/docs/prod/folders/print/cc2591.html This would extend the range of your beacon compared to other nodes, increasing the probability that more nodes will hear it. However, depending on your distances and the accuracies that you look at, you might want to incorporate time of flight into your precision measurements. Cheers, Thomas On Fri, Aug 14, 2009 at 9:19 AM, Alan Marchiori<[email protected]> wrote: > On Thu, Aug 13, 2009 at 10:04 PM, Jinkyu Koo<[email protected]> wrote: >> Dear all, >> >> I am planning to measure synchronization error in a large-scale network. >> For this, basically I need to see the difference in local clock between >> two nodes at a moment. >> It was easy in lab environment that nodes are all in a one-hop range, >> because we can have a reference signal broadcaster and each node records >> its local clock tick when receiving the reference signal. >> >> However, sometimes the two nodes can be physically in far distance in >> the large network. >> so that it is not easy to measure the local clock tick in different >> nodes at the "same instant". >> >> Could you suggest me any idea to resolve this issue? >> >> Thanks in advance. >> >> Jinkyu Koo >> >> >> > > If I am reading this correctly FTSP is exactly what you want. > > see http://docs.tinyos.net/index.php/FTSP > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- "Don't complain; Just work harder" - Randy Pausch Thomas Schmid, Ph.D. Candidate Networked & Embedded Systems Laboratory (NESL) University of California, Los Angeles (UCLA) _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
