GPRS support for Ofono

[Marcel Holtmann]

Hi Denis,

> > > >> The reason is simple, Nokia modems suspend GPRS when scanning (or
> > > >> registering), simply because the operation will take roughly three
> > > >> times as long with GPRS attached. You will find this feature in
> > > >> current phones, too.
> > > >
> > > > Then ideally you should have two scan modes, periodic and user
> > > > initiated.  For periodic mode we don't care how long it takes.
> > >
> > > +1
> >
> > Sounds like a plan. So we do need an /etc/ofono/main.conf :)
> 
> So my current thinking is to introduce a method to NetworkRegistration 
> property called 'ProposeOperatorScan' and a new property called 
> 'OperatorScanInterval'.  The driver api can then support a (non-standard 
> *gasp*) option to say whether this scan was initiated actively or not.
> 
> Maybe the Nokia modems can use this information not to drop the GPRS link if 
> it isn't an active scan being performed.

I really prefer if we put this into /etc/ofono/main.conf since the UI
should not configure this at all. It is more a one time setting based on
what the integrator expects as a behavior.

Regards

Marcel