H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/1.1
H04Q 1/20 (2006.01) H04L 12/56 (2006.01)
Patent
CA 1227555
- 43 - ADAPTIVE PREFERENTIAL FLOW CONTROL FOR PACKET SWITCHING SYSTEM Abstract Flow control of data packets through a packet switching network to reduce congestion is controlled by an adaptive preferential permit packet (APP) processing from an originating data terminal through each packet switch node of the network to a destination data terminal. APP requires less buffer storage capacity at each switch node, and enables data packets to enter the network only when there is a permit packet indication that the data packets are likely to reach, and be accepted by, their destination. The permit packet is sent node to node prior to a transmission of a bulk of data packets. Each node is equipped to queue buffer a permit packet on a preferential basis ahead of data packets. The node discards the permit packet if the number of packets awaiting transmission from that node exceeds a prescribed threshold. This is throttling process, since the originating port times out and resends a permit packet if a permit-return packet is not received within a predetermined time. Permit-return packet processing, adaptive time-out?controls, and preferential treatment of permit packets are disclosed.
464147
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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