| 摘要 |
In an ATM network, traffic can be self-regulated to avoid congestion by a method where the "congested" indication provided for in the Payload Type field of the standard cell format is set by a switch when the size of queues provided in the switch to statistically multiplex switched inputs onto output ports suggests the approach of congestion and where the said "congested" indication is subject to a check at the receiving port of the network and a message is sent to the source port if the proportion of cells carrying the "congested" indication on a particular channel is relatively high and where, on receipt of such a message, the permitted bandwidth of the channel is reduced and, if no congestion messages are received over a specified period the permitted bandwidth is increased, said reduction and increases of bandwidth being in small increments between absolute limits. <IMAGE> |
