Hi Giacinto,
On 10/24/2018 09:58 PM, Giacinto Cifelli wrote:
Hi Denis,
So the ideal situation would be to turn all this off for LTE based
dongles, have the ability to tell the modem not to auto-attach on 3G/2G,
and maybe even attach only controlling 3G/2G PS domain only, not LTE.
this is not possible, and there are all the Hand-over scenarios, for
example during a CSFB call, or loss of LTE coverage.
What exactly is impossible? a CSFB call goes onto the CS domain, so
there should be no problem going from LTE -> CS only, no?
It seems strange how LTE works because it is often overlooked that it
is just the GPRS part of 2G/3G,
with a small difference at the registration phase, which also performs
the attach (hence it is called combined attach).
Yes, but roaming is also completely different with LTE and many of these
weird historical billing quirks no longer apply.
Maybe it is really worth to start an ofono 2.x branch and remove this
roaming control on the attach.
Perhaps, but I wouldn't mind attempting to work around this without
major surgery. If we can't, then we can't, but lets not give up yet.
Or, more conservative, add another variable for how to control
roaming: attach or context activation (that can be applied also to
LTE).
That is along the lines of what I was thinking...
And decide globall, in the plug-in for the modem, or
subscription-based how to set this second variable (possibly all 3,
with overrides).
Feel free to propose something
Regards,
-Denis
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