COMMUNICATION DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND COMMUNICATION PROGRAM

摘要

A communication apparatus includes a receiver configured to receive metadata of update data for use in updating, a determination unit configured to determine whether there are update data subject to preliminary downloading indicating downloading the update data in advance before an update allowable time, based on a description of the metadata, and an update process unit configured to download the update data when the determination unit determines that there are the update data subject to preliminary downloading.