This invention suppresses power consumption of a mobile communication terminal apparatus in data exchange in wireless communications. For this purpose, when wireless communications are established between a mobile communication terminal apparatus (200) and MFP (300), the mobile terminal (200) sends a processing request to the MFP (300). Upon reception of this request, the MFP (300) re-establishes communications with the mobile terminal (200) so as to set a communication mode in a passive mode, and to share roles to have the MFP as an initiator, and the mobile terminal as a target.
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