Abstract: There is provided a communication device which includes a determination section that determines propriety of a retransmission request on a basis of priority specified for each area within a frame in retransmission control, and a transmission section that generates retransmission request data, and makes transmission to another communication device, in a case where the retransmission request is permitted in the determination section.

Abstract: There is provided a corrosion management system including: a measurement data acquisition unit that acquires measurement data indicating the corrosion state of a first portion of a structure which is an evaluation target; and a corrosion estimation unit that estimates the corrosion state of a second portion of the evaluation target based on the relational expression between the corrosion state of the first portion and the corrosion state of the second portion, and the measurement data of the first portion.

Abstract: A communication device according to an aspect of the present disclosure includes: a determination section that determines propriety of a retransmission request on a basis of priority specified for each area within a frame in retransmission control; and a transmission section that generates retransmission request data, and makes transmission to another communication device, in a case where the retransmission request is permitted in the determination section.

Abstract: The present disclosure relates to a communication device, a communication method, and a program that make it possible to provide higher communication quality. A retransmission detection unit acquires a message count included in a header of a packet transmitted from a communication device on a transmission side via a data channel, and detects the message count of the packet that is a candidate for which retransmission is requested as a retransmission candidate message count, and a retransmission request unit generates retransmission request data for requesting retransmission of the packet held to be enabled to be transmitted by the communication device on the transmission side among a plurality of the packets with the retransmission candidate message count. The present technology can be applied to, for example, a communication system mounted on a vehicle.