Patent ID: 9319334
Filing Date: 2016-04-19
CPC Classification: H04L

Claim Text:
1. A method for controlling congestion in a communication network, the method being performed by a node in the communication network, the method comprising: providing a table that associates each of a plurality of ports provided for the node with at least one address assigned to at least one of a plurality of transmission source devices that are coupled to the node via the communication network; detecting first congestion in the communication network, based on frames that are received via the plurality of ports and stored in a frame buffer provided for the node; determining one or more first ports that receive frames causing the detected first congestion, based on a current traffic volume of each of the plurality of ports; determining, regardless of source addresses included in the received frames, a first transmission source device whose address is associated with the each first port in the table as a transmission source device causing the detected first congestion; setting a first address assigned to the first transmission source device as a destination address of a congestion notification message for giving notice of the detected first congestion; and transmitting, via each of the determined one or more first ports, the congestion notification message whose destination address is the first address, to the first transmission source device.