4RF Aprisa LTE, Руководство пользователя

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82 | Aprisa LTE User Manual
E-UTRAN Cell ID (ECI)
E-UTRAN Cell Identifier (ECI) is a decimal number used to identify a cell uniquely within an operator mobile
network (or Public Land Mobile Network (PLMN)). The ECI has a length of 28 bits and contains the eNodeB-
IDentifier (eNB-ID) and the cell sector (i.e. concatenating number of [eNB-ID | sector]). The ECI can address
either 1 or up to 256 cell sectors per eNB, depending on the length of the eNB-ID which can be either 20
bits or 28 bits. A Macro eNB (MeNB) cell site provides coverage served by a high-power tower/antenna cell
site, serving multiple UEs and contain the 20 bits option and thus the remaining 8 bits are used to represent
the cell sectors (up to 256). A Home eNodeB (HeNB) is 3GPP term for an LTE femtocell or small cell, provides
low coverage/power, serving very small number of UEs, optimized for deployment for smaller coverage than
Macro eNB, such as indoor premises. HeNB contains the 28 bits option for eNB (i.e. ECI in this case represents
the eNB or HeNB with a single sector).
The ECI, eNB-ID and cell sector are very important for RF path planning and installation. The user can use
this information on the installation phase to validate it is connected to the appropriate eNB-ID and cell
sector per the RF path planning.
eNB-ID
Evolved NodeB Identifier (eNB) is a decimal number used to identify an eNB uniquely within an operator
mobile network (or Public Land Mobile Network (PLMN)). The eNB-ID can have either 20 bits or 28 bits. It is
also comprised within the Global eNB-ID, which uniquely identifies an eNB globally. The Global eNB-ID is
constructed from the Mobile Country Code (MCC), Mobile Network Code (MNC) and eNB-ID i.e. a
concatenating number of [MCC | MNC | eNB-ID]. As explained in the ECI description, this eNB-ID value should
be ignored when connecting to HeNB where ECI represents the eNB-ID in this case.
Sector
Cell sector represented is a decimal number used as an identifier of a particular sector within an eNB-ID.
The cell sector can have either 0 bits or 8 bits. As explained in the ECI description, this cell sector value
should be ignored when connecting to HeNB where ECI represents the eNB-ID in this case (i.e. a single
sector).
Tracking Area Code (TAC)
Displays the current Tracking Area Code (4 digits). The TAC is used to identify a tracking area (TA) in the
cellular network of an operator. The TAC is part of the Tracking Area Identity (TAI). The TAI is composed of
a TAC, a Mobile Network Code (MNC) and a Mobile Country Code (MCC) (i.e. a concatenating number of [MCC
| MNC | TAC])