Fair share egress queuing scheme for data networks

摘要

A method of controlling congestion in data networks wherein data is received by an egress port and buffered in a local buffer associated with a source of the element. For each data element received, the egress port determines whether a global threshold is exceeded and, if so, requests all data sources to reduce their rate of data delivery to the egress port. Similarly, the egress port determines whether a local threshold is exceeded and, if so, requests the one source associated with the local buffer to reduce the data delivery rate to the egress port. Optionally, if the data delivery rate of the one source falls below a predetermined minimum rate, the one source may refuse the request. In response, the egress port requests other data sources to reduce their rate of data delivery to the egress port.