[Tinyos-devel] Re: [Tinyos Core WG] time sync interfaces

[Omprakash Gnawali]

On Dec 18, 2007 2:09 PM, David Gay <dgay42 at gmail.com> wrote:
> On Dec 18, 2007 2:03 PM, John Griessen <john at ecosensory.com> wrote:
> > David Gay wrote:
> >
> > > Surely that depends on what resolution timesync you think is
> > > worthwhile? My assumption is that different apps have different
> > > precision requirements, from second-level timesync down to
> > > microsecond-level timesync. I'm fairly sure that second-level timesync
> > > doesn't require an adjustable PLL oscillator ;-)
> >
> > OK.  Yes, a .1 second resolution HIL module would be a go...
> > and yes that is more useful than systems out of sync by half a second...
> >
> > Any chance we have of using the most deterministic delays coming from the hardware
> > we should take it is all I meant.
> >
> > What time accuracy do you call a useful timesync on our current platforms?
>
> Well I was asking that question too, actually ;-) I'm not an
> application developper/expert, so I can't really answer.
>
> David
> PS: I suspect with reasonable evidence that millisecond level timesync
> is practical.
>

Or you might need more if you look at the applications that use FTSP:
seismic monitoring by various groups and certain flavor of
localization.

- om_p