Dynamic window sizing in a data network

Details Dynamic window sizing in a data network Dynamic window sizing in a data network

H - Electricity

04

Q

344/28

H04Q 3/42 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2030349

A method for use in a high-speed virtual circuit digital network for resizing windows of virtual circuits in nodes of the network. The resizing of a virtual circuit's window is initiated by an input router at an edge of the digital network. When the input router determines that resizing is necessary, it sends a first congestion control message to the nodes through which the virtual circuit passes. If the message indicates a larger window, the node receiving the message determines what size window it can provide and sends the message with that window size on to the nextnode. An output router at the other edge of the digital network receives the message, sets the window size based on the message as altered by the nodes, and returns asecond message with the final window size via the nodes. On receipt of the second message, the nodes alter their windows and the input router sends cells as permitted by the new window. Included in the method are novel techniques for determining the ideal window size for a virtual circuit, for determining at the input router when a change in window size is necessary, and for determining the size of the window in the nodes.

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