A radio base station including: a first interface configured to communicate with a different radio base station via a network among radio base stations, a second interface configured to wirelessly communicate with a radio terminal, and a processor configured to control a transmission of a first signal to the radio terminal when a load of the network among the radio base stations is higher than a given level, the first signal indicating to reject a second signal transmitted from the radio terminal, the second signal requesting to add a bearer between the radio base station and the radio terminal via the different radio base station.