METHOD OF INTER-VEHICLE COMMUNICATING USING NAVIGATION ROAD MAP INFORMATION

摘要

Disclosed is an inter-vehicle communicating method using navigation road map information which enables accurate information to be delivered swiftly via a broadcasting technique referring to the road map information at positions such as intersections when knowing on which road a vehicle is located based on directional information of the vehicle in a vehicle navigation system combined with a global positioning system (GPS). The method for the inter-vehicle communications is as follows. A navigation unit keeps track of a vehicle to determine a position of the vehicle on a road. A message receiving unit receives a message from other vehicles within a communications range. A road coordinate extracting unit analyzes the received message to extract road coordinate information from the message. A determining unit determines whether the message is to be relayed or not depending on whether the extracted road coordinate information and current road coordinate information of the vehicle belong to the same road segment. When it is determined, by message relay unit, that the received message is to be relayed, a message relay unit relays the received message to other vehicles on the same road segment.