Papers › Efficient Online Timed Pattern Matching by Automata-Based Skipping
Efficient Online Timed Pattern Matching by Automata-Based Skipping
Masaki Waga, Ichiro Hasuo, Kohei Suenaga
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The timed pattern matching problem is an actively studied topic because of its relevance in monitoring of real-time systems. There one is given a log w and a specification 𝒜 (given by a timed word and a timed automaton in this paper), and one wishes to return the set of intervals for which the log w, when restricted to the interval, satisfies the specification 𝒜. In our previous work we presented an efficient timed pattern matching algorithm: it adopts a skipping mechanism inspired by the classic Boyer--Moore (BM) string matching algorithm. In this work we tackle the problem of online timed pattern matching, towards embedded applications where it is vital to process a vast amount of incoming data in a timely manner. Specifically, we start with the Franek-Jennings-Smyth (FJS) string matching algorithm---a recent variant of the BM algorithm---and extend it to timed pattern matching. Our experiments indicate the efficiency of our FJS-type algorithm in online and offline timed pattern matching.
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