5G Daftar Istilah

S1AP S1 Application Protocol S1AP is used between the eNB and the MME in order to support operations such as E-RAB (E-UTRAN Radio Access Bearer) Management, transfer of UE Context information, NAS Signalling transport, Paging and EPC based mobility.

GUMMEI Globally Unique MME Identifier The GUTI (Globally Unique Temporary Identity) has two main components, the GUMMEI (Globally Unique MME Identifier) that uniquely identifies the MME that allocated the GUTI and the M-TMSI (M-Temporary Mobile Subscriber Identity) that provides for an unambiguous identity of the UE within this MME.

GUTI Globally Unique Temporary ID In LTE the GUTI is allocated to the UE by the MME and has two components. These are the GUMMEI (Globally Unique MME ID) and the M-TMSI (MME-TMSI). While the GUMMEI identifies the MME, the M-TMSI identifies the UE within the MME.

Tracking Area

Tracking Area is a logical concept of an area where a user can move around without updating the MME. The network allocates a list with one or more TAs to the user. In certain operation modes, the UE may move freely in all TAs of the list without updating the MME. You can think of 'Tracking Area' as 'Routing Area' in UMTS.

Each eNobe broadcasts a special tracking area code (TAC) to indicate to which Tracking Area the eNodeB belong to and the TAC is unique within a PLMN. (Since PLMN is a unique number allocated to each of the system operator and TAC is a unique in a PLMN, if you combine these two numbers you would have a globally unique number. This number (PLMN + TAC) is called Tracking Area Identity (TAI)

UE stores a group of TAC and this group of TAC maintained in a UE is called Tracking Area List. UE does not need to go through Tracking Area Update procedure when it moves along this TAI.

Tracking Area Codes (TACs) or TAs: it is group of eNodeBs in one small area with maximum number of 100 eNodeBs. TAC and TAL planning is to determine the size of a TAC and TAL border. The TAC and TAL size is simply defined as the number of eNodeBs in the TAC or TACs in a TAL.

Public Land Mobile Network Identifier or with abbreviated version PLMN is a combination of MCC and MNC. It is unique value and globally used to identify the mobile network that a user subscribed.

MCC: Mobile Country Code is used in wireless telephone networks such as GSM, CDMA, WCDMA or LTE in order to identify mobile user belongs to which country. MCC consists of 3 decimal digits.

MNC Mobile Network Code The Mobile Network Code is either a two or three digit number used to uniquely identify a given network from within a specified country ( MCC (Mobile Country Code)). The MNC is used as part of the IMSI (International Mobile Subscriber Identity) and LAI (Location Area Identity) etc.