KEYWORDS: Prototyping, Java, Analytical research, Information operations, Systems modeling, Space operations, Document management, Performance modeling, Telecommunications, Control systems
Net-centric information spaces have become a necessary concept to support information exchange for tactical warfighting
missions using a publish-subscribe-query paradigm. To support dynamic, mission-critical and time-critical operations,
information spaces require quality of service (QoS)-enabled dissemination (QED) of information. This paper describes
the results of research we are conducting to provide QED information exchange in tactical environments. We
have developed a prototype QoS-enabled publish-subscribe-query information broker that provides timely delivery of
information needed by tactical warfighters in mobile scenarios with time-critical emergent targets. This broker enables
tailoring and prioritizing of information based on mission needs and responds rapidly to priority shifts and unfolding
situations. This paper describes the QED architecture, prototype implementation, testing infrastructure, and empirical
evaluations we have conducted based on our prototype.
Recent trends in distributed real-time and embedded (DRE) systems motivate the development of tactical information
management capabilities that ensure the right information is delivered to the right place at the right time to satisfy quality
of service (QoS) requirements in heterogeneous environments. A promising approach to building and evolving large-scale
and long-lived tactical information management systems are standards-based QoS-enabled publish/subscribe
(pub/sub) platforms that enable applications to communicate by publishing information they have and subscribing to
information they need in a timely manner. Since there is little existing evaluation of how well these platforms meet the
performance needs of tactical information management, this paper provides two contributions: (1) it describes three common
architectures for the OMG Data Distribution Service (DDS), which is a QoS-enabled pub/sub platform standard,
and (2) it evaluates three implementations of these architectures to investigate their design tradeoffs and to compare their
performance. Our results show that DDS implementations perform well in general and are well-suited for certain classes
of data-critical tactical information management systems.
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