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Transmission control method and device










Image Number 4 for United States Patent #8055279.

When information of its own station is transmitted to another mobile station by a CSMA access method, by a transmission control method and device, moving speed information and location information is transmitted with a predetermined minimum transmission power until a moving speed of its own station exceeds a first threshold, and the moving speed information and the location information is transmitted with a first transmission power proportional to the moving speed when the moving speed of its own station exceeds the first threshold. In this case, moving direction information of its own station may be acquired and transmitted in addition to the moving speed information and the location information. If the moving speed of the other mobile station exceeds a second threshold higher than the first threshold and a moving direction of the other mobile station is an approaching direction to its own station while its own station is not making transmission with the moving speed of its own station exceeding the first threshold, the first transmission power is switched over to a second transmission power proportional to the moving speed of the other mobile station and the moving speed information and the moving direction information is transmitted.








 
 
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