Handling QSS unsolicited in power state transitions
Aleksander Morgado
aleksander at aleksander.es
Wed Aug 2 17:19:13 UTC 2017
>> Note that this issue is again unrelated to the actual hot sim swapping
>> logic implemented; but now that we're starting to support hot sim
>> swapping, we should probably also check that usecase. At the end Telit
>> isn't the only module that may power off SIM Card during low power
>> mode.
>> So, how about a manual check to validate whether the SIM is different
>> or not?, e.g comparing whether the old property values we got before
>> the low power mode are still the same ones now after the power up...
>
> I understand, but I think that it is not strictly related to power low as
> well and it should not be taken into account there. Maybe a SIM power OFF
> mode? I do not know if this make any sense, but I see it more logic.
>
> Ideally, the modem should notify that is going to shut the SIM OFF, then the
> Core can manage it, e.g. checking if something changed as you said, when the
> SIM will be swiched ON again.
>
Don't think we can rely on all modems reporting that the SIM is going
off or on, that is why i was thinking on a more generic solution based
on comparing SIM details, it's probably a good fallback.
--
Aleksander
https://aleksander.es
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