FIG. 8 shows an example of updating a sleep determination power threshold by the information processing device 100 for every reception of a packet addressed to the own-device. Updating is performed by using reception power of the packet addressed to the own-device with reference to the received packet as a reference signal. By updating the sleep determination power threshold for every reception of a packet addressed to the own-device as described above, accurate estimation of reception power of a desired packet is realizable in a manner following fluctuations of an environment for the information processing device 100.

FIG. 8 also shows an example of notifying a communication partner about the updated sleep determination power threshold at intervals of a predetermined period. By this method, the communication partner is notified about the latest sleep determination power threshold at appropriate timing.

Initially, the control unit 160 of the information processing device 100 determines whether or not a packet addressed to the own-device has been received (step S811). In case of determination that no packet addressed to the own-device has been received (step S811), the flow proceeds to step S813.

In case of determination that a packet addressed to the own-device has been received (step S811), the control unit 160 updates a sleep determination power threshold (step S812). More specifically, the control unit 160 acquires predicted reception power of a desired packet, and determines a sleep determination power threshold on the basis of the predicted reception power of the desired packet.