Communication device for a motor vehicle, motor vehicle, and communication method

#This application claims the priority, under 35 U.S.C. § 119, of German patent application DE 10 2015 205 924.3, filed Apr. 1, 2015; the prior application is herewith incorporated by reference in its entirety.

#The invention relates to a communication device for a motor vehicle by way of which the motor vehicle can communicate with other motor vehicles.

#Motor vehicles are equipped with communication devices of this type in order to implement an autonomous communication between a plurality of motor vehicles. Communication between the motor vehicles participating in road traffic can result in a considerable increase in road safety.

#FIG. 1 shows an embodiment of the motor vehicle according to the invention with a communication device according to the invention in a schematic cross-sectional view;

#FIG. 2 shows the embodiment of the motor vehicle according to the invention from FIG. 1 in a schematic top view; and

#FIG. 3 shows an embodiment of a communication module of the communication device according to the invention.

#Referring now to the figures of the drawing in detail and first, particularly, to FIG. 1 thereof, there is shown the motor vehicle 100 which has a communication device 1 according to the invention. The communication device 1 comprises two communication modules 2a, 2b which are disposed at a distance from one another and are configured in each case to communicate independently and wirelessly with other motor vehicles via signals 4a, 4b. The communication modules 2a, 2b are furthermore configured to communicate with one another independently and wirelessly via signals 3. The data exchange between the communication modules 2a, 2b is performed bidirectionally.

#Each of the communication modules 2a, 2b has its own module housing 9a, 9b via which it is attached in each case to the motor vehicle 100. The first communication module 2a is attached to the front windshield 102 of the motor vehicle 100 and is configured to communicate with other motor vehicles located in the direction of travel 101. The second communication module 2b is attached to the rear window 103 of the motor vehicle 100 and is configured to communicate with other motor vehicles located opposite the direction of travel 101. Both communication modules 2a, 2b are configured to communicate with other motor vehicles that are positioned laterally.

#As shown in FIG. 2, the communication modules 2a, 2b in each case have a limited transmit and receive radius 14a, 14b. However, the respective limited transmit and receive radii of the communication modules 2a, 2b are designed in such a way and the communication modules 2a, 2b are disposed within the motor vehicle 100 in such a way that the transmit and receive radii 14a, 14b of both communication modules 2a, 2b together form an omnidirectional characteristic, substantially without any blind spot. Both communication modules 2a, 2b are consequently configured to transmit signals 4a, 4b at a limited beam angle only and to receive signals 4a, 4b from a limited angle of incidence only.