Pedestrian-vehicle communication system

A pedestrian terminal device configured to be carried by a pedestrian for performing a pedestrian-vehicle communication with an in-vehicle terminal device mounted on a vehicle, comprising:

• a pedestrian-vehicle communicator for performing a pedestrian-vehicle communication with the in-vehicle terminal device;
• a pedestrian-pedestrian communicator for performing a short-range wireless communication of a shorter range and a smaller power output than the pedestrian-vehicle communication with another pedestrian terminal device;
• and
• an controller for selecting one of a principal terminal operation mode wherein the pedestrian-vehicle communication with the in-vehicle terminal device is performed representing other pedestrian terminal devices, and an in-group terminal operation mode wherein the short-range wireless communication is performed with another pedestrian terminal device operating in the principal terminal operation mode;
• wherein, when the principal terminal operation mode is selected, the controller
• transmits a principal terminal communication status notification including position information on the own pedestrian terminal device to other pedestrian terminal devices,
• upon receiving principal terminal communication request notifications from the other pedestrian terminal devices in response to the principal terminal communication status notification, calculates distances to the other pedestrian terminal devices based on position information on the other pedestrian terminal devices contained in the principal terminal communication request notifications;
• transmits to those pedestrian terminal devices located within a predetermined distance from the own pedestrian terminal device a principal terminal communication status notification containing an ID of the other pedestrian terminal devices located within the predetermined distance, and
• performs a pedestrian-vehicle communication with the in-vehicle terminal device, representing the other pedestrian terminal devices located within the predetermined distance.