Patent ID: 8433313

Claim:
A mobile communication method for establishing a control signal connection between a higher-level node and a radio base station, the method comprising the steps of: transmitting, from the higher-level node to a macro radio base station, a first control signal connection establishment request, when the higher-level node detects that no control signal connection is established with the macro radio base station; establishing a first control signal connection between the higher-level node and the macro radio base station in response to the transmitted first control signal connection establishment request; transmitting, from a home radio base station to a higher-level node, a second control signal connection establishment request, when the home radio base station detects that no control signal connection is established with the higher-level node; and establishing a second control signal connection between the higher-level node and the home radio base station in response to the transmitted second control signal connection establishment request; wherein the higher-level node does not transmit the second control signal connection establishment request to the home radio base station, even when detecting that no control signal connection is established with the home radio base station.