As described above, the control unit 160 may determine the sleep determination power threshold on the basis of reception power of a reference signal from a first device which transmits a packet addressed to the own-device (e.g. communication partner of information processing device 100). In this case, for example, the control unit 160 may determine the sleep determination power threshold on the basis of the latest reference signal in the reference signals received from the first device, or a plurality of the reference signals received from the first device. In addition, in case of presence of a plurality of the first devices, for example, the control unit 160 may determine the sleep determination power threshold on the basis of the reference signal indicating the lowest reception power, or the reference signal indicating the highest reception power. Furthermore, for example, the control unit 160 may determine the sleep determination power threshold on the basis of at least any one of a battery residual amount of the information processing device 100, a data volume of data handled by the information processing device 100, a type of the data, and a communication environment of the information processing device 100.
Thereafter, the control unit 160 determines whether or not a packet has been received (step S803). In case of determination that no packet has been received (step S803), monitoring continues.