Patent ID: 8457637
Filing Date: 2013-06-04
Classification: H04W

Abstract:
1. A mobile communication method in a mobile communication system including a Closed Subscriber Group (CSG) cell to which only a mobile station having an access right to the CSG cell can access, comprising performing the following steps in sequence: (A) transmitting, from the mobile station to a radio base station in communication, a predetermined signal including a frequency of a CSG cell and information of Radio Access Technology (RAT), when the mobile station determines that the mobile station exists nearby the CSG cell, the mobile station having an access right to the CSG cell; (B) transmitting, from the radio base station to the mobile station, a measurement configuration for the frequency of the CSG cell; (C) measuring, at the mobile station, the frequency of the CSG cell in response to the measurement configuration for the frequency of the CSG cell; and transmitting, from the mobile station to the radio base station, a measurement report including a Physical Cell Identity (PCI) and a reception quality in the CSG cell; (D) transmitting, from the radio base station to the mobile station, an instruction signal for instructing to notify a Cell Global Identity (CGI) of a cell specified by the PCI included in the measurement report; (E) receiving, at the mobile station, broadcast information of the cell specified by the PCI in response to the instruction signal; and transmitting, from the mobile station to the radio base station, a response signal including a CGI and a Closed Subscriber Group Identification (CSG-ID) included in the broadcast information and information indicating whether or not the mobile station belongs to the CSG; (F) starting, at the radio base station, a handover process of the mobile station to the CSG cell; and (G) determining, at an upper node of the radio base station, whether the mobile station has an access right to the CSG cell or not.