Abstract: A message relay apparatus and a message relay method that achieve high message reachability taking communication network situation into consideration are provided. A message relay apparatus 100 interposed between an application 20 and a device 30 includes a device communication state determination functional unit 131 that determines communication availability with the device 30, a network state estimation unit 133 that estimates a network state based on the communication availability, and a message processing unit 110 that determines forwarding availability of an application message based on the network state and buffers the application message when forwarding is not available.

Abstract: In order to enable support information to be presented at a timing that is appropriate for a user, a movement support information presentation control apparatus according to an embodiment of the present invention estimates an audio environment and a visual environment that surrounds the user in addition to a driving performance of the user and an operation state of a driving apparatus 2. In addition, based on these estimation results, suitability of information presentation is determined for each type of presentation sections 81 to 83 and, when it is determined that information presentation is not suitable, control is performed so as to postpone an information presentation operation by a corresponding presentation section.