| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for achieving efficient transfer of inter-vehicle communication packet, regardless of whether or not there is a large vehicle and whether or not an inter-vehicle communication device is mounted on a large vehicle.SOLUTION: An obstruction detector (54) detects existence and position of an obstruction obstructing inter-vehicle communication. A reference position detector (52) detects the position of a transmission source vehicle, i.e., the transmission source of a communication packet received by inter-vehicle communication as a reference position. When an angle formed by an obstruction position vector representing the position detected by the obstruction detector with the reference position detected by the reference position detector as a start point, and an own vehicle position vector representing the position of the own vehicle with the reference position as a start point, is a preset threshold angle or less, transfer execution units (55, 56) transfer the communication packet received from the transmission source vehicle.SELECTED DRAWING: Figure 1 |
