[time-nuts] How are iPhones' clocks set under LTE?
Chris Albertson
albertson.chris at gmail.com
Mon Aug 4 16:53:29 UTC 2014
On Mon, Aug 4, 2014 at 6:09 AM, Bill Dailey <docdailey at gmail.com> wrote:
> I have never done a rigorous analysis but it appears to be within 1.5s or better most of the time.
That is what to expect. as of IOS 5 they use NTP but they look at the
clock drift and use NTP at a polling interval just good enough to keep
under 2 seconds of error. Keeping the clock dead-on requires to much
battery power. At least this is what I remember reading when IOS 5
came out.
They "ration" use of NTP to maintain a maximum error
--
Chris Albertson
Redondo Beach, California
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