3G data connection loss

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Pierre Kim admin at manateeshome.com
Wed Nov 14 13:19:03 UTC 2018


> If you go to flight mode and back, does data continue?
> If you wait two minutes and try again, does it work again?
Switching to flight mode itself doesn't help, I guess I have to wait two
minutes until the SGSN finds out about the missing PDP context and tries
to reopen the connection.
> Also recently there was
> http://lists.osmocom.org/pipermail/openbsc/2018-November/012362.html
> Oh wait, that was you, as well!
Yeah thats me, I ended up creating two separate threads because one got
held in the moderation queue for a few days. Sorry for that.

One interesting thing that I discovered is that if I just patch the GGSN
to ignore all Error Indication packets(not deleting the PDP context),
data works surprisingly well. Still there are some quirks but it becomes
very reliable. That makes me wonder if those Error Indications are even
needed in the first place. One could look into the cause of Error
Indication from the SGSN.

Regards,
Pierre
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