Réduction des besoins en communication de CORBA

CORBA has been designed while supposing that the network capacity is always sufficiently large. This however, is not always the case. In particular, we note the case of Command and Control Systems (C2S) using CORBA for communication between distributed subsystems. These C2S need to guarantee the transmission of data, even in extreme situations where the com- munication performance may drop to as low as 1 200 bps. In this paper, we first discuss the needs and problems of communication in C2S which use CORBA. We then present a model of how to reduce data transmission in such systems. The model identifies four types of data reduction : (1) pragmatic reduction, based on the context of the application execution, (2) semantic reduction taking the application’s semantics into account, (3) syntactic reduction, where only knowledge of the communication language is needed, and (4) physical reduction, such as mere data compression which

, 1998