Wide-Area Actuator RPC over GridStat with Timeliness, Redundancy, and Safety

GridStat is a QoS-managed middleware framework designed to replace the power grid's aging, inflexible, and slow data communications system. GridStat is a specialization of the publish-subscribe paradigm that takes advantage of the semantics of periodic updates of cached sensor data to provide d...

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Bibliographic Details
Main Authors: Viddal, Erlend S, Bakken, David E, Gjermundrod, Harald, Hauser, Carl H
Format: Conference Proceeding
Language:English
Subjects:
Aging
Competitive intelligence
Delay
Fault tolerance
Intelligent actuators
Middleware
Power grids
Publish-subscribe
Redundancy
RPC
Software safety
WAN
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Description
Summary:GridStat is a QoS-managed middleware framework designed to replace the power grid's aging, inflexible, and slow data communications system. GridStat is a specialization of the publish-subscribe paradigm that takes advantage of the semantics of periodic updates of cached sensor data to provide data delivery with a per-subscriber rate, latency, and redundant paths. While GridStat is well-suited for delivery of sensor data over a wide-area network, its baseline one-way mechanisms are not suitable for round-trip invocations such as setting an actuator or calling between control centers. In this paper we present the design, implementation and experimental evaluation of Ratatoskr, a tunable remote procedure call mechanism that builds on the QoS semantics of GridStat and supports three kinds of redundancy. Additionally, user-defined pre- and post-condition predicates over GridStat status variables are built into the call semantics.
DOI:10.1109/CISIS.2010.60