Abstract: A base station used in a communication system comprising a core network, and a first and second base stations both of which are connected to the core network, wherein the base station being used as the first base station, the base station comprising: a network communication unit that receives a bearer setting request from the core network; and a bearer control unit that determines, when performing bearer setting based on the bearer setting request, whether or not a predetermined condition is met, and, when the predetermined condition is met, decides not to set a bearer that connects the second base station and the core network to each other or to restrain from setting the bearer.