Is it vendor specific or standard defined the behavior when UE does not report its location to MME even after TAU timer expires ? Here assumed , LTE UE is out of coverage .
when mme will change the security keys and send it in ue context modification request message
What MME shall perform when receiving S1 path switch request (changing tac and lac for the UE) after a NAS tau request. Shall MME respond to UE with TAU reject (which cause code ) or not ?
