Patent ID: 7694317
Filing Date: 2010-04-06
Classification: H04B,H04N

Abstract:
1. A CATV transmission line monitoring system comprising: an information collecting unit for periodically collecting, by polling, a plurality of measured values detected at a plurality of cable modems, the plurality of cable modems being installed so as to be distributed over feeder lines of a subscriber's premises and a trunk line of CATV transmission lines having a tree structure; a statistical processing unit for, at every predetermined time interval, calculating an average value of the plurality, of measured values collected during the predetermined time interval and storing the average value as statistically processed information; a threshold value setting unit for dynamically setting a failure determination threshold value by adding or subtracting a predetermined statistical difference threshold value to or from the average value of a previous time; and a failure determination unit for determining if a failure is present by comparing the set failure determination threshold value with a measured value collected at this point, and storing the determination result as failure information.