Abstract: The present invention relates to a communication unit and a communication method for communicating data in a communication system, with storage means (9) for storing a profile data base, said profile data base comprising parameter data describing attributes of the communication system, said parameter data being arranged in parameter sets respectively describing a collection of attributes, whereby the parameter sets are allocated to profile units so that each profile unit comprises at least one parameter set and one parameter set can be allocated to a plurality of profile units, and managing means (10) for managing said parameter data in said profile data base and for controlling a means (18) for reading and writing parameter data from and in said storage means (9). The present invention provides a flexible and efficient way to manage and retrieve profile data in communication systems.