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What is Event Based Tracking Area Update?

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What is Event Based Tracking Area Update?
posted May 24 by anonymous

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1 Answer

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Tracking area update procedure is used by UE to updated its current location (LTE tracking area level) to its registered MME/Core Network. There are two ways to do it. One is known as "periodic TAU" and the other one is "event based(a periodic) TAU".
During attach and tracking area update procedure, MME provides a list of tracking areas to UE.
If UE detects a new tracking area against the list provided by network, it triggers tracking area update procedure. It is known as event based tracking area update.

answer May 25 by Vikram Singh
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+1 vote

On what basis UE decides whether it should trigger TAU procedure or not ?

+2 votes

I know that once the security has been established for the NAS signalling connection, the MME will not process any NAS signalling messages unless they have been successfully integrity checked by the NAS. Is there any scenario where the Tracking Area Update Request sent by the ue will not be integrity protected but still it is processed at the mme and a proper response is given to ue .?

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