Patent ID: 8352594
Filing Date: 2013-01-08
Classification: H04L,H04N

Abstract:
1. A network monitoring device which monitors a network in which data is transmitted through a plurality of relays, said network monitoring device comprising: a monitoring frequency recording unit configured to record monitoring frequencies each of which represents a monitoring frequency for monitoring a transmission status of a corresponding one of the plurality of relays; a selection probability generating unit configured to generate selection probability information which is probability values for the plurality of relays; a monitoring object determining unit configured to determine, according to the monitoring frequency and the selection probability information, a relay the transmission status of which is to be monitored, from the plurality of relays; a transmission status obtaining unit configured to obtain transmission status information indicating a transmission status on the relay determined by said monitoring object determining unit; a transmission status recording unit configured to record the transmission status information; an activation level calculating unit configured to calculate, based on a difference in activation level, which increases in accordance with a correlation between the transmission statuses and the monitoring frequencies of the plurality of relays indicated by the transmission status information, the activation level indicating suitability of the monitoring on the transmission statuses of the plurality of relays; and a monitoring frequency updating unit configured to update, based on a difference in monitoring frequency which increases in accordance with the activation level, the monitoring frequency recorded on said monitoring frequency recording unit.