MESSAGE TRANSMISSION APPARATUS AND METHOD FOR TRANSMITTING MESSAGE THEREOF

摘要

PURPOSE: A message transmission method of a transmission node is provided to acquire diversity from a target node by cooperatively transmitting a relay node and a vehicle message. CONSTITUTION: A message creation unit broadcasts an initial vehicle message according to emergency situation occurrence information(S150). The message creation unit selects relay nodes using neighbor node information(S160). The message creation unit receives a pilot tone from the selected relay nodes(S170). When N pilot tones are received within a predetermined time period, a transceiving unit transmits the vehicle message and relay nodes selected in a predetermined time period to a target node(S180,S190). [Reference numerals] (AA) Start; (BB,DD) No; (CC,EE) Yes; (FF) End; (S110) Beacon message reception; (S120) Signal strength and reception signal rate measurement; (S130) Target node selection; (S140) Is emergency situation generated?; (S150) Initial vehicle message broadcasting; (S160) Relay node selection; (S170) Pilot tone reception; (S180) Nr number of pilot tones reception?; (S190) Vehicle message cooperative transmission