Patent ID: 8724458

Claim:
A method of controlling a queue buffer arranged to queue data units received over a communication network, comprising: invoking a congestion notification procedure under a predetermined condition, wherein said congestion notification procedure comprises: determining whether any of a plurality of queued data units contain a predetermined congestion notification prevention information, performing a congestion notification with respect to the one or more queued data units if none of the plurality of queued data units contain said predetermined congestion notification prevention information, and preventing a performance of a congestion notification at least with respect to: one or more of the plurality of queued data units containing said predetermined congestion notification prevention information, and one or more of the plurality of queued data units belonging to a same flow as said one or more queued data units containing said predetermined congestion notification prevention information, wherein preventing performance of the congestion notification on a data unit includes preventing the data unit from being dropped and preventing the data unit from being or marked with a congestion notification flag.