A user equipment including a control unit that identifies a resource reserved by another user equipment in a selection window for selecting a resource, and that determines a resource other than the identified resource, as a transmission candidate; and a transmitting unit that transmits a reservation signal for reserving the resource determined as the transmission candidate by using a resource for transmitting the reservation signal, the resource for transmitting the reservation signal being associated with a resource set including the resource determined as the transmission candidate, wherein two or more resources that are usable for transmitting the reservation signal are allocated in a predetermined time domain interval, and the two or more resources are associated with different resource sets that are mutually orthogonal.