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In Which scenario ENB sends DETACH request with EPS service not allowed?

+1 vote
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In Which scenario ENB sends DETACH request with EPS service not allowed?
posted Jul 11, 2018 by Jaganathan

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Detach Request is a NAS message and it originates from either UE or network side.
eNodeB does not deal with any NAS message since it can't be decoded and encoded at eNodeB.

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+1 vote

Generally MME serves a group of tracking areas and belongs to at least one PLMN.
Lets assume, MME receives S1-setup request from eNodeB with the list of supported TAs.
Now, there are three possibilities as captured below.
1. All supported TAIs match at MME
2. Not even a single TAI match at MME
3. Few TAIs match at MME

I want to know, what MME will do for case 2 and case 3 ? How it will respond to eNodeB ?
If MME responds with S1-setup failure then what would be the cause value ? I did not find any reference in 36.413 for these scenarios.

+2 votes

Can somebody please explain the procedure of Detach Request if it is triggered by Network.?

0 votes

Hi, I heard that starting from some of 3gpp releases MME can not send detach to eNB during receives "cancell location" from HSS.
Is it true? In which release it was described first?

Aleksei

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