| 摘要 |
Method and system for ensuring fairness in packet ring networks are described. In one embodiment, at each node, the traffic rate of incoming packets of a particular traffic class is measured and compared with a threshold the identity of which depends on the location of a destination node relative to the current node. For each such incoming packet, if the threshold is exceeded, the packet is marked as "non-conforming" before being sent into the network. Upon receipt of a congestion notification signal from a congested link, all packets in the network marked as non-conforming and destined for or beyond the congested node are dropped until congestion eases. As a consequence of the fairness mechanism, congestion control with maximum bandwidth utilization is also realized.
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