Abstract: An ID management unit allocates a first connection ID to a first vehicle in a first period and allocates the first connection ID to a second vehicle in a second period. A correction information acquisition unit connects to a distribution device using the first connection ID and receives correction information for the first vehicle from the distribution device in the first period. The correction information acquisition unit connects to the distribution device using the first connection ID and receives the correction information for the second vehicle from the distribution device in the second period. With the system, it is possible to reduce waste of connection IDs necessary for connection to the distribution device that distributes correction information for realizing high-accuracy positioning.