| 摘要 |
A vehicle location system and method (18, 36) whereby the position coordinates of a vehicle (10) are made available to other vehicles (12) or to fixed locations (72, 74, 76) by transmission of a data message (50) containing position coordinates of the vehicle (10). The time slot (48) in which the data message is transmitted is uniquely assigned to each transmitting vehicle as a function of its position in a grid segment (39) with respect to a reference waypoint (40) assigned to that grid segment. Position information in latitude and longitude is provided to each receiving vehicle, together with a precise timing signal, by the Global Positioning System (GPS). A synthetic latitude function and a synthetic longitude function provide a periodic mapping (41) of a specific time period onto areas (64, 68) represented by grid segments (67, 70) charted on the global surface.
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