[Discuss] cell Network time no longer provided

[gaf at blu.org (Jerry Feldman)]

Indiana used to be that example. Today, most of Indiana is Eastern time
with the northwest and Southwest counties on Central, but before 2006
some counties observed DST and some did not.

On 03/16/2015 10:36 AM, Kent Borg wrote:
> On 03/16/2015 09:46 AM, Shirley M?rquez D?lcey wrote:
>> CDMA networks (Verizon, Sprint, and their MVNOs) are unlikely to make
>> that change because they MUST have accurate time sources available at
>> every cell site.
>
> They have to have precise timing to make CDMA soft-hand-off work, but
> does that necessarily translate into providing the civilian time
> information that the phone OS is looking for?
>
> "Time", in a physics sense, is pretty simple. Some cool relatively
> stuff, and questions about why it is unidirectional, not withstanding.
>
> But "time", in a civilian sense is complicated as hell: We want it to
> line up with contradictory celestial stuff and the changing whims of
> law makers on various levels of government and in various geographies.
>
> Providing precise phase information to CDMA isn't the same as knowing
> when daylight saving time begins. Might they have just dumped the
> civilian part? Remember, GPS time is now many seconds off of the
> seconds-portion of civilian time.
>
> Also, aren't the old GSM carriers now using updated protocols that are
> getting all spread spectrum on us? Do they need some of that precise
> timing coordination now, too?
>
> -kb
>
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-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix
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