Real time and dependability concepts
Distributed systems (2nd Ed.)
Consistency control for distributed interactive media
MULTIMEDIA '01 Proceedings of the ninth ACM international conference on Multimedia
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In a distributed embedded system, data items may be moved from one set of functional modules to another through a common buffer that is interposed between them over a network. Here, the computation modules disseminating data should agree on what data items are written into the remote buffer, to coordinate their actions on the external environment. Furthermore, a timely effect of these actions requires enforcing deadlines on the processing of data from the remote buffer. To meet these requirements, we need a programming structure that enables a consistent view of the processing on data in the buffer by various computation modules over prescribed time intervals. Our structure allows an explicit application-level control of the asynchrony and timing of information flow between various modules. Its use is illustrated with a case of battlefield 'data fusion' application.