Information processing system and self-driving assistance method

An information processing system to assist a vehicle to be assisted having a self-driving function in driving, which comprises:

• a roadside information processor installed on a roadside, and
• a communication antenna installed on the roadside,
• wherein the roadside information processor comprises:
• a vehicle information acquisition unit to acquire vehicle information relating to one or more vehicles to be assisted located in a coverage area covered by the communication antenna,
• a transmit data generation unit to generate transmit data based on the vehicle information acquired by the vehicle information acquisition unit, and
• a data sending unit to send the transmit data generated by the transmit data generation unit to a processor of the vehicle to be assisted via the communication antenna,
• the transmit data includes vehicle position information indicating a position of the vehicle to be assisted, and drive control information,
• the drive control information includes a target value relating to at least one of a velocity, an acceleration, a deceleration and a steering angle of the vehicle to be assisted,
• the transmit data is transmitted at a predicted time based on an estimated arrival time of the vehicle at a predetermined road position so that the vehicle to be assisted performs self-driving based on the vehicle position information and the drive control information generated by or sent from the roadside information processor, and
• the estimated arrival time of the vehicle is calculated based on a rate of change of an relative distance at each process cycle.