Here, we will discuss the Location identifiers in LTE mobile network, including the mobile operator identifier, the Tracking Area identifier, and the Cell identifier.

• In LTE mobile network, every eNB consists of several cells, and every group of cells, are grouped into a Tracking Area (TA).
• Therefore, we can say that, the the mobile network consists of several TAs.

Mobile Operator Identifier

• The PLMN ID identifies every mobile network. PLMN refers to 'Public Land Mobile Network'.
• The PLMN ID consists of two parts, the MCC and the MNC.
• MCC refers to 'Mobile Country Code', and it is a unique ID for every country. While MNC refers to 'Mobile Network Code', which is a unique ID for every network inside the country.

Tracking Area Identifier

• We use Tracking Area Code (TAC), in order to locally identify every TA.
• In order to identify the TA globally , we use the TA Identity (TAI).
• The (TAI) consists of the Mobile Country Code (MCC), Mobile Network Code (MNC), and the (TAC).

Cell Identifier

• The eNB ID identifies Every eNB.
• And the ECI which refers to 'E-UTRAN Cell Identifier', locally identifies every cell inside the network.
• While the ECGI, which refers to 'E-UTRAN Cell Global Identifier', globally identifies every cell.
• The EGCI consists of the MCC, the MNC, and the ECI.

In summary, every group of LTE cells are grouped into a TA.

• And the ECI identifies every cell locally. While the ECGI identifies every cell globally.
• And TAC locally identifies every TA , while TAI globally identified every TA.