Section: 19.4.2.4 Mobility Management Entity (MME)
Content: A Mobility Management Entity (MME) within an operator's network is identified using a MME Group ID (MMEGI), and an MME Code (MMEC). A subdomain name shall be derived from the MNC and MCC by adding the label "mme" to the beginning of the Home Network Realm/Domain (see clause 19.2). The MME node FQDN shall be constructed as: mmec<MMEC>.mmegi<MMEGI>.mme.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org Where <MMEC> and <MMEGI> are the hexadecimal strings of the MMEC and MMEGI. An MME pool FQDN shall be constructed as: mmegi<MMEGI>.mme.epc.mnc<MNC>.mcc<MCC>.3gppnetwork.org If there are less than 2 significant digits in <MMEC>, "0" digit(s) shall be inserted at the left side to fill the 2 digit coding. If there are less than 4 significant digits in <MMEGI>, "0" digit(s) shall be inserted at the left side to fill the 4 digit coding.