The invention relates to a radio transmission/radio reception device and to a method for communication within a, in particular wireless, motor vehicle communication system interacting in ad-hoc fashion which are configured such that the radio transmission/radio reception device emits a piece of information about the scope of envisaged reports, at least one further radio transmission/radio reception device receives the information, and the further radio transmission/radio reception device takes the received information as a basis for stipulating a frequency for the emission of chronologically successive reports.