US Patent 11777581 Operation method in V2X device mounted on vehicle

One disclosure of the present specification provides an operation method in a vehicle-to-everything (V2X) device mounted on a vehicle. The method comprises the steps of: receiving a capability enquiry message from a base station; and transmitting capability information to the base station. The capability information includes information on whether a wireless link with the base station and a sidelink with a neighboring V2X device are supported through the same antenna. The method comprises a step of receiving, from the base station, information about a default beam set on the basis of the capability information.