Prevention of deadlocks and livelocks in lossless,...

Details Prevention of deadlocks and livelocks in lossless,... Prevention of deadlocks and livelocks in lossless,...

H - Electricity

04

L

H04L 12/24 (2006.01) H04J 1/16 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2322406

A packet communication network is arranged so that a backpressure or feedback signal is sent from a receiving node to a node having packets to send to the receiving, node, selectively allowing only certain packets to be considered eligible for transmission. The backpressure is arranged to be lossless, and to avoid network deadlocks and livelocks. The transmission of a packet from a sending node to a receiving node via a link, is controlled by sending from the receiving node to the upstream node a feedback value that assures that there will be room in the buffer in the receiving node to store packets subsequently received from the upstream node; assigning a priority level to packets stored in the buffer of the receiving node; and transmitting from the sending node to the receiving node, only those stored packets at whose priority level exceeds the feedback value received from the receiving node.

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