Patent ID: 6504823
Filing Date: 2003-01-07
Classification: H04L

Abstract:
A network monitoring system, comprising:at least one master node; a plurality of slave nodes controlled by the master node, wherein the master and slave nodes are connected in a ring-like manner through transmissions lines, each of the nodes transmits data and commands in one direction through the transmission lines and transmits a state monitoring command for monitoring an operational state of a network to an immediate upstream-side node, and the operational state of the network is monitored by a response from the immediate upstream-side node with respect to the state monitoring command; a traffic monitoring unit provided in the master node, the traffic monitoring unit monitoring an amount of traffic in the network and determining whether the amount of traffic is less than a predetermined value; and a start-command transmitting unit provided in the master node, the start-command transmitting unit transmitting a start command for instructing a start of transmission of the state monitoring command to each of the slave nodes when the traffic monitoring unit determines that the amount of traffic is less than the predetermined value.