Abstract: An electronic device includes a shell and an antenna assembly. The casing has an accommodating space. The antenna assembly is located in the accommodating space, and includes a substrate, a first antenna component, a second antenna component and a third antenna component. The first antenna component, the second antenna component and the third antenna component are disposed on the substrate. The first antenna component includes a first radiation portion and a first ground portion, which are disposed on two opposite sides of the substrate. The second antenna component includes a second radiation portion and a second ground portion, which are disposed on two opposite sides of the substrate. The third 10 antenna component includes a third radiation portion and a third ground portion, which are disposed on two opposite sides of the substrate.

Abstract: A cooperative vehicle safety method is provided. The cooperative vehicle safety method includes: collecting a local map information, a local traffic sign information, and a state information of an object received from at least one sensing unit by a roadside unit; optimizing the received state information of the object; predicting a moving direction of the object according to the optimized state information of the object, a plurality of history driving traces of the object, a plurality of vehicle driving trace patterns, the local map information, and the local traffic sign information; and determining whether to send an alert according to the predicted moving direction of the object.