Detecting abnormal time intervals
First Claim
1. A system for determining if a time period after a sensing node has sensed an event exceeds a threshold value, includingestablishing means for establishing a plurality of reference threshold values, wherein each reference threshold value is associated with a set of reference inter-event time intervals or metrics statistically derived therefrom,calculating means for calculating a set of preliminary time intervals or metrics statistically derived therefrom, based on events sensed by the sensing node,comparing means for comparing the set of preliminary inter-event time intervals or metrics statistically derived therefrom, with each set of reference inter-event time intervals or metrics statistically derived therefrom,identifying means for identifying the reference threshold value associated with the set of reference inter-event time intervals or metrics statistically derived therefrom, being the closest match to the set of preliminary inter-event time intervals or metrics statistically derived therefrom, anddetermining means for determining if, upon the sensing node sensing a further event, the time period after the sensing node has sensed the event exceeds the identified reference threshold value before a yet further event is sensed by the sensing node or an associated sensing node.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for determining if a time period after a sensing node has sensed an event exceeds a threshold value, including establishing means for establishing a plurality of reference threshold values, wherein each reference threshold value is associated with a set of reference inter-event time intervals or metrics statistically derived therefrom, calculating means for calculating a set of preliminary time intervals or metrics statistically derived therefrom, based on events sensed by the sensing node, comparing means for comparing the set of preliminary inter-event time intervals or metrics statistically derived therefrom, with each set of reference inter-event time intervals or metrics statistically derived therefrom, identifying means for identifying the reference threshold value associated with the set of reference inter-event time intervals or metrics statistically derived therefrom, being the closest match to the set of preliminary inter-event time intervals or metrics statistically derived therefrom, and determining means for determining if, upon the sensing node sensing a further event, the time period after the sensing node has sensed the event exceeds the identified reference threshold value before a yet further event is sensed by the sensing node or an associated sensing node.
8 Citations
12 Claims
-
1. A system for determining if a time period after a sensing node has sensed an event exceeds a threshold value, including
establishing means for establishing a plurality of reference threshold values, wherein each reference threshold value is associated with a set of reference inter-event time intervals or metrics statistically derived therefrom, calculating means for calculating a set of preliminary time intervals or metrics statistically derived therefrom, based on events sensed by the sensing node, comparing means for comparing the set of preliminary inter-event time intervals or metrics statistically derived therefrom, with each set of reference inter-event time intervals or metrics statistically derived therefrom, identifying means for identifying the reference threshold value associated with the set of reference inter-event time intervals or metrics statistically derived therefrom, being the closest match to the set of preliminary inter-event time intervals or metrics statistically derived therefrom, and determining means for determining if, upon the sensing node sensing a further event, the time period after the sensing node has sensed the event exceeds the identified reference threshold value before a yet further event is sensed by the sensing node or an associated sensing node.
-
8. A method for determining if a time period after a sensing node has sensed an event exceeds a threshold inter-event time interval, including the steps of
establishing a plurality of reference threshold values, wherein each reference threshold value is associated with a set of reference inter-event time intervals or metrics statistically derived therefrom, calculating a set of preliminary inter-event time intervals based on the sensing of a plurality of events by the sensing node, comparing the set of preliminary inter-event time intervals or metrics statistically derived therefrom, with each set of reference inter-event time intervals or metrics statistically derived therefrom, identifying the reference threshold value associated with the set of reference inter-event time intervals or metrics statistically derived therefrom being the closest match to the set of preliminary inter-event time intervals or metrics statistically derived therefrom, and upon the sensing node sensing a further event, determining if the time period after the sensing node has sensed the further event exceeds the identified reference threshold value before a yet further event is sensed either by the sensing node or an associated sensing node.
Specification