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LTE: Can a UE send Attach Request with IMSI if already Emergency attached with IMEI?

+1 vote
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I have a question regarding the behavior of UE when SIMless attached. In case when a UE is Emergency Attached wth IMEI, can it trigger again Attach with IMSI, without been detached in the meanwhile?

In other words, is it valid a case that UE triggers an Emergency call without SIM (only IMEI sent), and while calling, we put the SIM and UE triggers IMSI attach? Is this a valid scenario?

posted Sep 2, 2016 by anonymous

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1 Answer

0 votes

I don't think show it is possible since UE will be already in the EMM-REGISTERED state and UE does not trigger attach procedure unless it is in EMM-DE-REGISTERED. Expecting few more inputs from others and correct me if my understanding is not right.

answer Sep 2, 2016 by Ganesh
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