Talk "On Synchronous and Asynchronous Compatibility of Communicating Components"

by Rolf Hennicker

Mon, 09 January 2017 at 02:00 pm in Binz (Rügen), Germany

Joint work with: Michel Bidoit

Abstract: We study interacting components and their compatibility with respect to synchronous and asynchronous composition. The behavior of components is formalized by I/O-transition systems. Synchronous composition is based on simultaneous execution of shared output and input actions of two components while asynchronous composition uses unbounded FIFO-buffers for message transfer. In both contexts we study compatibility notions based on the idea that any output issued by one component should be accepted as an input by the other. We distinguish between strong and weak versions of compatibility, the latter allowing the execution of internal actions before a message is accepted. For finite transition systems synchronous compatibility is decidable while it is not for asynchronous systems. We study under which conditions (strong/weak) synchronous compatibility is sufficient and necessary to get (strong/weak) asynchronous compatibility. We show that these conditions characterize half-duplex systems. Then we focus on the verification of weak asynchronous compatibility for possibly non half-duplex systems and provide a decidable criterion that ensures weak asynchronous compatibility.