[ntp:questions] Re: WLAN synchronization @ 10-100us

Dale Worley worley at dragon.ariadne.com
Tue Dec 9 02:31:36 UTC 2003


rovery78 at yahoo.com (Magnus) writes:
> In a wired network this is possible by adding customized hardware that
> inserts time-stamps in packets just before they reaches the physical
> level of the stack.

I have no idea if this would work, but:  Since you're talking about
customized hardware anyway, how about attaching a device to the server
that broadcasts a pulse of some sort once a second (on some unlicensed
frequency).  This pulse would be very simple, its only requirement is
that it provide an accurate (within 10 us) indication of exactly when
the "top of the second" is.  Then attach receivers of this pulse to
the clients, and use the receiver's output as a PPS source for NTP.

Dale



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