GUTI 구조 § MMEI (MME Identifier) = MMEGI (MME Group Identifier) + MMEC (MME Code) – MMEGI : The identifier of each MME groups – MMEC : The code of each MME § GUMMEI (Globally Unique MME Identifier) = PLMN ID + MMEI § M-TMSI (MME Temporary Mobile Subscriber Identity) – Identifies the UE within the MME § S-TMSI (SAE Temporary Mobile Subscriber Identity) – Used to locally identify a UE within a MME ..