Patent ID: 8271041

Claim:
A radio base station comprising: a first baseband processor configured to perform a processing of a baseband signal including user data transmitted and received by a mobile station; a second baseband processor used as a standby system of the first baseband processor; a switching determiner configured to determine whether or not to switch from the first baseband processor to the second baseband processor; an information transmitter configured to transmit a suspension request to suspend the transmission of the user data prior to the switching from the first baseband processor to the second baseband processor, when the switching determiner determines the switching from the first baseband processor to the second baseband processor; and an handover execution unit configured to perform the handover of a processing from the first baseband processor to the second baseband processor, based on the transmission of the suspension request by the information transmitter, or on the determination of the transmission of the suspension request, wherein the information transmitter transmits the suspension request to set the transmission rate of the user data to zero, the radio base station operates in accordance with HSDPA defined by the 3rd generation partnership project and in accordance with EUL defined by the 3rd generation partnership project, the information transmitter transmits a notification indicating that a capacity allocation rate is 0 kbps to radio network controller as the suspension request, when the radio base station operates in accordance with the HSDPA, or transmits a zero grant to the mobile station as the suspension request, when the radio base station operates in accordance with the EUL.