I already answered, please refer following link. http://tech.queryhome.com/150273/when-initiates-authentication-information-request-ulr-pur
when mme receives Initial Ue messages(attach request) then mme sends AIR to HSS on s6a interface. But At what point when mme initiates Update location request/PUR with respect to s1ap/egtp-C ? Thanks in advance.
From MME to eNodeB, UE context modification procedure is triggered I know but what makes trigger of UE Context modification procedure from eNodeB to MME ?
What could be the scenario in which source eNodeB triggers "handover cancel" procedure towards the MME ?