Abstract: A communication system includes a game machine and a headset. The headset detects a state change in the present device, the state change in the present device being caused by a predetermined action of a user, and transmits a signal indicating the state change in the present device to the game machine. The game machine receives, from at least one of one or more external devices, a signal indicating a state change in the external device. The game machine identifies a partner device in predetermined communication processing from among the one or more external devices on the basis of the received signal indicating the state change.

Abstract: A communication system includes a game machine and a headset. The headset detects a state change in the present device, the state change in the present device being caused by a predetermined action of a user, and transmits a signal indicating the state change in the present device to the game machine. The game machine receives, from at least one of one or more external devices, a signal indicating a state change in the external device. The game machine identifies a partner device in predetermined communication processing from among the one or more external devices on the basis of the received signal indicating the state change.

Abstract: An information processing device includes a main function unit which realizes main functions of the information processing device and is operated by being switched between a normal operation mode and a power-saving mode in which less power is consumed than in the normal operation mode, a position acquisition unit which acquires positional information indicating the current position, and a logging controller which causes a first storage unit to record movement trace information obtained by making the positional information acquired by the position acquisition unit correspond to the time when the positional information is acquired in the state where the main function unit is switched to the power-saving mode.

Abstract: An information processing device includes a main function unit which realizes main functions of the information processing device and is operated by being switched between a normal operation mode and a power-saving mode in which less power is consumed than in the normal operation mode, a position acquisition unit which acquires positional information indicating the current position, and a logging controller which causes a first storage unit to record movement trace information obtained by making the positional information acquired by the position acquisition unit correspond to the time when the positional information is acquired in the state where the main function unit is switched to the power-saving mode.