A first terminal device, for use in a wireless telecommunications system, including: a receiver; a transmitter: a storage medium operable to store mapping information identifying sets of predetermined radio resources and a predetermined geographical region associated with each respective set of predetermined radio resources; and a controller operable to: receive a geographical location, the geographical location of the terminal device being determined by a location unit; determine the predetermined geographical region of the received mapping information within which the determined geographical location is located; determine the set of predetermined radio resources associated with the determined geographical region using the received mapping information; control the receiver to receive signals from a second terminal device using the determined set of predetermined radio resources; and control the transmitter to transmit signals to the second terminal device using the determined set of predetermined radio resources.