  Cell-Free networking is one of the prime candidates for 6G networks. Despite
being capable of providing the 6G needs, practical limitations and
considerations are often neglected in current research. In this work, we
introduce the concept of federations to dynamically scale and select the best
set of resources, e.g., antennas, computing and data resources, to serve a
given application. Next to communication, 6G systems are expected to provide
also wireless powering, positioning and sensing, further increasing the
complexity of such systems. Therefore, each federation is self-managing and is
distributed over the area in a cell-free manner. Next to the dynamic
federations, new accompanying terminology is proposed to design cell-free
systems taking into account practical limitations such as time synchronization
and distributed processing. We conclude with an illustration with four
federations, serving distinct applications, and introduce two new testbeds to
study these architectures and concepts.
