An information processing device comprising: an acquisition unit adapted to acquire information about sidelink communication (S1); and a determination unit adapted to determine whether to enable feedback related to an automatic repeat request of data in the sidelink communication (S2) based on the information about the sidelink communication; wherein the acquisition unit is adapted to acquire, as information about the sidelink communication, information indicating whether another receiving device the feedback of which is enabled is located within a predetermined range of a first communication device serving as a receiving device for the sidelink communication, and the determination unit is adapted to determine whether to enable the feedback of the first communication device based on the information about whether the another receiving device the feedback of which is enabled is located within the predetermined range; wherein when the another receiving device the feedback of which is enabled is located within the predetermined range, the determination unit is adapted to determine to disable the feedback of the first communication device (S6), and is further adapted to: a) determine whether to execute data retransmission to the first communication device based on the feedback of the another receiving device, or b) determine a data transmission method used for data transmission to the first communication device from a plurality of data transmission methods based on the feedback of the another receiving device. an acquisition unit adapted to acquire information about sidelink communication (S1); and a determination unit adapted to determine whether to enable feedback related to an automatic repeat request of data in the sidelink communication (S2) based on the information about the sidelink communication; wherein the acquisition unit is adapted to acquire, as information about the sidelink communication, information indicating whether another receiving device the feedback of which is enabled is located within a predetermined range of a first communication device serving as a receiving device for the sidelink communication, and the determination unit is adapted to determine whether to enable the feedback of the first communication device based on the information about whether the another receiving device the feedback of which is enabled is located within the predetermined range; wherein when the another receiving device the feedback of which is enabled is located within the predetermined range, the determination unit is adapted to determine to disable the feedback of the first communication device (S6), and is further adapted to: a) determine whether to execute data retransmission to the first communication device based on the feedback of the another receiving device, or b) determine a data transmission method used for data transmission to the first communication device from a plurality of data transmission methods based on the feedback of the another receiving device. a) determine whether to execute data retransmission to the first communication device based on the feedback of the another receiving device, or b) determine a data transmission method used for data transmission to the first communication device from a plurality of data transmission methods based on the feedback of the another receiving device. <EOS>