Unlimited Decidability of Distributed Synthesis with Limited Missing Knowledge.

We study the problem of controller synthesis for distributed systems modelled by Zielonka automata. While the decidability of this problem in full generality remains open and challenging, we suggest here to seek controllers from a parametrised family: we are interested in controllers that ensure frequent communication between the processes, where frequency is determined by the parameter. We show that this restricted controller synthesis version is affordable for synthesis standards: fixing the parameter, the problem is EXPTIME-complete.