Patent Number: 6,294,991

Title: Method and system therefor for ensuring a true activation of distributed restoration in a telecommunications network

Abstract: To ensure that the distributed restoration process of a DRA provisioned network proceeds only in response to true failures, the present invention DRA network provisions to each of the ports of the nodes a timer mechanism for ascertaining whether an alarm is a genuine alarm. This is done by presetting the timer with an expiration period so that an alarm is validated as a failure only upon the expiration of the timer. When validated, the value of a counter is incremented. The value of the counter is reflective of the sum of validated alarms, and is compared against a preset threshold value. And it is only when the value of the summed validated alarms exceeds the preset threshold value would the DRA process be initiated. When a validated alarm ceases, the reverse process takes place. That is, the ending of the alarm has to be validated by another timer, which could be the same timer as used for validating an alarm. The counter is decremented for each validated non-alarm, so that when the value of the defect counter falls below the threshold value, the DRA process is reset.

Inventors: Allen; John David (Garland, TX), Bengston; Lee (Murphy, TX), Shah; Jasvantrai (Richardson, TX)

Assignee: MCI Communications Corporation

International Classification: H04Q 3/00 (20060101); H04L 12/24 (20060101); G08B 029/00 ()

Expiration Date: 09/25/2018