MOBILE COMMUNICATION SYSTEM Russian patent published in 2015 - IPC H04W12/00 H04W48/14 

FIELD: radio engineering, communication.

SUBSTANCE: closed subscriber group (CSG) cell is a cell which allows use of subscribers. In order to receive a service from the CSG cell, a CSG identifier (CSG-ID) is required to be notified to user equipment, which cannot be obtained outside the reach of radio waves from a non-CSG cell. In a mobile communication system including base stations respectively provided in a CSG cell and a non-CSG cell in which access is made to the CSG cell with the use of a CSG-ID issued in a case where use of the CSG cell is allowed, the base station provided in the CSG cell refers to the notified identification information of user equipment and then transmits a tracking area update request from the user equipment to a core network, and the core network determines whether the user equipment is allowed to use the CSG cell and, in the case where the use is allowed, transmits a signal for allowing assignment of radio resources to the user equipment and the CSG-ID. The user equipment accesses the CSG cell using the CSG-ID.

EFFECT: high quality of communication.

4 cl, 51 dwg