Hello Eric,
This is an excerpt from a posting to another mainling list, I just
On Wed, 15 Jul 2009 11:00:14 +0200, "Eric Cathelinaud" <e.cathelinaud@googlemail.com> wrote:
>
> I was just thinking about performing a recursive paging in order to see how
> much time I have until the battery of a mobile phone run out.
> Does anyone know if the mobile phone answers at every paging or if it
> doesn't "listen" all the time? I think it listens periodically. If anyone
> can give me a clue, that would be appreciated.
quote it because I don't want to repeat what I already wrote:
> - The phone is in "idle" mode (no speech/data traffic)
> and periodically receives the paging channel (PCH) to
> find out if its being called. Further the phone measures
> the signal strength of neighbor cells and every now
> and then (not that frequent as the above actions)
> receives the cell information in the broadcast common
> control channel (BCCH) of the serving cell and of
> at most six neighbor cells with the strongest signal.
....
> - The time between receiving the PCH is determined by a
> parameter of the serving cell (BS_PA_MFRMS, range 2 to 9).
> Its measured in 51-multiframes until the PCH for the phone
> repeats (if you want to know the details have a look at
> the GSM specs ;-) . The length of a 51-multiframe is
> 235.8 ms, this means the time between receiving the PCH
> is in the range 471.9 ms to 2122.2 ms. In this time the
> idle phone most of the time sleeps or receives the BCCH
> of the serving cell or one of the neighbor cells with
> the strongest signal (at most six).
Best regards,
Dieter
--
Dieter Spaar, Germany spaar@mirider.augusta.de