Method of monitoring to anticipate the triggering of an alarm

• US 4,825,195 A
• Filed: 05/01/1987
• Issued: 04/25/1989
• Est. Priority Date: 05/07/1986
• Status: Expired due to Fees

• Current Assignee: Yves Berruyer
• Original Assignee: Yves Berruyer
• Inventors: Berruyer, Yves
• Primary Examiner(s): Crosland, Donnie L.
• Application Number:
  US07/044,739
• Time in Patent Office: 725 Days
• Field of Search: 340/501, 340/500, 340/506, 340/510, 340/511, 340/525, 340/526, 340/508, 340/524, 364/550, 364/551
• US Class Current: 340/501
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold
• CPC Class Codes: G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions
• CPC Class Codes: G08B 31/00 Predictive alarm systems characterised by extrapolation or other computation using updated historic data
• CPC Class Codes: H04M 3/36 Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks

Abstract

A method of monitoring to anticipate the triggering of an alarm, wherein: an awaited profile is available which represents awaited values of the signal over a predetermined period; the awaited profile is used to estimate the future development of the signal as a function of its values on past dates; the estimated value of the signal is compared for at least one future date at a threshold; and an alarm is triggered if the estimated value is higher than the threshold.

Claims

1. A method of monitoring a signal representing the amplitude of a predetermined physical value to trigger an alarm if the amplitude of the signal cross a predetermined threshold, wherein:

(a) an historical profile is available which represents historical values of the signal over a predetermined period;

(b) the historical profile is used to estimate the future development of the signal as a function of its values during past time periods, thereby obtaining an estimated value of the signal during at least one future time period;

(c) the estimated value of the signal is compared for the at least one future time period to the threshold; and

(d) an alarm is triggered if the estimated value is higher than the threshold.

2. A method according to claim 1, wherein the estimated value of the signal at the at least one future time period is equal to the value of the historical profile at that at least one future time period, corrected by a scale ratio between the amplitude of the historical signal and the amplitude of the monitored signal for the same time period.

3. A method according to claim 1, wherein the estimated value of the signal at the at least one future time period is equal to the value of the historical profile at that at least one future time period, multiplied by the ratio between the historical value during a predetermined past time period and the measured value of the monitored signal during the same time period.

4. A method according to claim 3, wherein the predetermined past time period is the time period of the maximum signal measured during the past time periods.

5. A method according to claim 1, wherein the physical value is the load of a telecommunications network element.