Nova Patents
EP1540535A4

Method and system for detecting change in data streams

Abstract

A system (10) for detecting change in a data stream (12) comprises a distribution maintenance engine (14), a difference determining means (16) and an alert generation engine (18). The system detects change in the alert stream by the distribution maintenance engine maintaining a short term distribution (24) that models the data stream and maintaining a long term distribution (26) that models the data stream. The difference determining means determines the difference between the short term distribution and the long term distribution. The alert generation engine applies a statistical measure to the difference and generates an alert if the measure of the difference exceeds a threshold.

Term

Term ended

Projected expiry passed 24 April 2023, 3.4 years ago.

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Every citation, both ways

Citations
DocumentRelationOfficeCategoryCited duringRelevant claims
US5847266ACitesUnited States of AmericaXSearch report1
US6321338B1CitesUnited States of AmericaXSearch report1
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DIHENG QU ET AL: "Statistical anomaly detection for link-state routing protocols", NETWORK PROTOCOLS, 1998. PROCEEDINGS. SIXTH INTERNATIONAL CONFERENCE ON AUSTIN, TX, USA 13-16 OCT. 1998, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 13 October 1998 (1998-10-13), pages 62 - 70, XP010309350, ISBN: 0-8186-8988-9Non-patent––Search report–