MESSAGE BROADCAST METHOD USING CONTENSION WINDOW IN VEHICULAR AD-HOC NETWORK

摘要

A method of selecting a relay node by using a competition window in a vehicle AD hoc network is provided to calculate a competition window in which each node is optimized and select an optimized relay node through competition between nodes, thereby reducing a message transmission delay time. Each node calculates a competition window. The competition window has time of the maximum size which is in inverse proportion to a distance. Each node selects a message transmission waiting time within a competition window. A node whose message transmission waiting time is expired is selected as a relay node. A node farthest from a source node is selected as a relay node.