US 12,217,597 B2
Detecting abnormal events for a monitoring system
Zhen Zhao, Berwyn, PA (US)
Assigned to Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed by Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed on May 17, 2022, as Appl. No. 17/746,507.
Application 17/746,507 is a continuation of application No. 16/439,094, filed on Jun. 12, 2019, granted, now 11,355,000.
Prior Publication US 2022/0277638 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G08B 21/24 (2006.01); G06F 16/21 (2019.01)
CPC G08B 21/24 (2013.01) [G06F 16/219 (2019.01)] 21 Claims
OG exemplary drawing
 
1. A method comprising:
maintaining, by a computing device, historical sensor state values indicating historical states of a plurality of sensors;
determining:
a current state transition time;
a first set of current sensor state values indicating states of the plurality of sensors prior to the current state transition time; and
a second set of current sensor state values indicating states of the plurality of sensors after the current state transition time; and
sending an anomalous activity alert, wherein the sending is based on:
a first plurality of historical sensor state values, of a first set of historical sensor state values, matching the first set of current sensor state values;
a second plurality of historical sensor state values, of a second set of historical sensor state values, matching the second set of current sensor state values; and
a time, associated with the current state transition time, corresponding to a time window associated with the first plurality of historical sensor state values and the second plurality of historical sensor state values.