[ntp:questions] .1 Microsecond Synchronization
Rob
nomail at example.com
Sat Jun 6 11:13:21 UTC 2009
Richard B. Gilbert <rgilbert88 at comcast.net> wrote:
>> How dumb... something like time-of-day should be broadcast just like
>> cell broadcast and everyone would be able to receive it without any
>> requesting.
>
> Time is broadcast! WWV, WWVB, CHU, JJY, etc. Most radio and TV
> stations broadcast the time; "At the tone the correct time will be. . .
> ." Many radio and TV stations get the time directly from WWV and
> rebroadcast the tone from WWV.
>
> CMDA base stations also broadcast the time. I'm not sufficiently
> familiar with the other technologies to be able to state that they do,
> or do not, supply correct time to the phones they serve.
Of course I mean "broadcast on the GSM network". That is where a GSM
phone is listening. It cannot receive WWV.
It should be trivial to send a datagram with current time at some
interval on such a digital phone network, but apparently this was not
foreseen in the standard.
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