Thanks for the reply, well do you mean to say that it needs a lot of work and it is not effiecient to find the distance according to the Time !! Is there a source code that could help me to implement such an algorithm??
Regards, Islam ----- Original Message ----- From: Janos Sallai <sal...@isis.vanderbilt.edu> Date: Saturday, February 28, 2009 2:54 am Subject: Re: [Tinyos-help] Time Stamp To: Islam Mohamad Ameen Al Jarrah <g00022...@aus.edu>, tinyHelp <tinyos-help@millennium.berkeley.edu> > 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
