A communication apparatus includes a function for performing transmission and reception of a wireless signal in a period having a predetermined length which arrives at a predetermined time interval, a function for performing at least one process of the transmission and the reception of the wireless signal in the period as a substitute for a particular communication apparatus belonging to a set of a plurality of communication apparatuses among which the period is synchronized, and a function for deciding whether or not proxy processing is to be performed in accordance with a frequency of periods during which the communication apparatus performs the transmission and the reception of the wireless signal among a plurality of the periods.