The present disclosure is to provide a DCDC converter capable of suppressing increase in the ripple amount of the output voltage in association with switching of the number of drive phases. Aspects of a method may include collecting TCP segments in a network interface card without transferring state information to a host system. In the step, the first station measures a first level fluctuation value more than once, wherein the first level fluctuation value indicates a fluctuation degree of electric field intensity of an electromagnetic wave received from the first wireless communication network. The URL address specifies the Aspect, the Aspect Object.