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What would be the functional difference between implicit and explicit detach procedure?

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What would be the functional difference between implicit and explicit detach procedure?
posted Oct 17, 2014 by Deepak Chitragar

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1 Answer

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Implicit -> When the detach procedure is initiated by the network(MME).

MME informs the UE with an EMM message (Service Reject/ TAU Reject) with EMM cause as "implicitly detached" only when the UE initiates any EMM procedure.

It then initiates the detach procedure by sending a DETACH REQUEST message to the UE
Detach type IE can either be "re-attach required" or "IMSI detach". For both of them there is a separate approach, i.e. how & why the bearer contexts are retained & how they are reestablished,etc.

Explicit -> When the UE initiates the detach procedure by sending a DETACH REQUEST message.

Again the detach type can be either ‘EPS detach’ / ‘IMSI detach’ / ‘Combined EPS/IMSI detach’.

answer Oct 19, 2014 by Ankush Surelia
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