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Which NAS message notifies the UE about ECM state?

+1 vote
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In the event of interruption to normal backhaul connection with EPC, the eNB may terminate the call session which require support of backhaul based services e.g a session with Fixed Line user. Following the dropped connection, UE abruptly experiences the ECM-Connected state error. Does a NAS message explicitly notifies the UE to transit the ECM-Connected state or its purely based on timer expiry? AND which NAS message notifies the UE to resume ECM-Connected state?

posted Apr 26, 2015 by anonymous

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