Patent ID: 7558236

Claim:
A control device for carrying out control of a first radio base station and a second radio base station at a time of handover from the first radio base station to the second radio base station in radio communications using a channel in which signals are code division multiplexed in time-slots, the time-slots including a control signal time-slot for control signals and a non control signal time-slot for non control signals, the control device comprising: a control channel determining unit configured to determine the control signal time-slot used to transmit and receive the control signals between the second radio base station and a radio terminal related to the handover, to judge whether the control signal time-slot is the same as a first non control signal time-slot used to transmit and receive non control signals between the first radio base station and another radio terminal other than the radio terminal related to the handover, and to judge whether the control signal time-slot is the same as a second non control signal time-slot used to transmit and receive non control signals between the second radio base station and the another radio terminal; and a carrier setting unit configured to switch at least one of the first and second non control signal time-slots to be in a time-slot other than the control signal time-slot determined by the control channel determining unit, when it is judged that the control signal time-slot is the same as the at least one of the first and second non control signal time-slots.