This paper will present the importance of focusing on and investigating the requirements for open digital communication architectures. Depending on the system that is being designed and implemented, a timing analysis of the overall control systems that comprise the whole system should be closely investigated using control systems analysis techniques. In doing so at an early stage of development, it would ensure the success of particular projects by bringing to light potential communication issues that would otherwise go unstudied. With systems that foster open architecture, it is important to note that having such an open system with plug and play capability may impose a great strain on a communication backbone. If this backbone were responsible for delivering time critical messages such as control system commands, then any latency that is imposed due to the communication backbone must be taken into consideration. Using frequency and time domain analysis, it is possible to highlight these areas and understand where most of the system degradation could occur if the communication latency were too high. With this in mind, one can determine the most appropriate physical layer and memory bandwidth requirements for each subsystem and an appropriate hub to route the data to the proper end recipient.
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