What is EMM (Evolved packet system mobility management)?

The Evolved Packet System Mobility Management (EMM) protocol gives methods for the management of mobility when the User Equipment (UE) utilizes the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN). It additionally gives management of safety to the NAS protocols. EMM can generally be started while a NAS signalling association exists. The strategies having a place with this kind are started by the network. They incorporate GUTI reallocation, confirmation, security mode control, identification and EMM data.