How UE Switch to Service types in LTE?

How UE Switch to Service types in LTE? selection criteria are cell selection criteria cell ue select re select normal service emergency call acceptable cell

The action of camping on provides access to services. The network provides different levels of service to a UE in either Idle mode or Connected mode. Three levels of services are defined:

LIMITED SERVICE: emergency calls on an acceptable cell.
Acceptable cell: UE may camp to obtain limited service like emergency call. The minimum set of requirements for initiating an emergency call in a UTRAN network are:

• The cell is not barred.
• The cell selection criteria are fulfilled.

NORMAL SERVICE: for public use on a suitable cell.
Suitable cell: UE may camp on to obtain normal service. Such a cell shall fulfill all the following requirements:

• The cell is part of the selected / registered / equivalent PLMN
• The cell is not barred
• The cell is not part of a forbidden registration area
• The cell selection criteria are fulfilled
• In case of a CSG cell it is part of the white list

OPERATOR SERVICE: FOR OPERATORS ONLY ON A RESERVED CELL.
Reserved cell: When the cell status “reserved for operator use” is indicated and the Access Class of the UE is 11 or 15 the UE may select/re-select this cell if in Home PLMN. Set by O&M parameter.

Barred cell:

When cell status “barred” is indicated the UE is not permitted to select/re-select this cell, not even for limited services. This information is set by office data.

Article Topics :

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