Queueing protocol

Details Queueing protocol Queueing protocol

H - Electricity

04

Q

344/28

H04Q 3/64 (2006.01) H04L 12/28 (2006.01) H04L 12/417 (2006.01) H04L 12/64 (2006.01)

Patent

CA 1252549

ABSTRACT OF THE DISCLOSURE There is described a method of transmitting data on a communications network having first and second unidirectional oppositely directed buses and access units coupled between the buses. The method includes the steps of arranging the data to be transmitted from the access units in data packets, and establishing a distributed queue in the network to control the order of data packet transmissions from said access units. Preferably, the method includes determining according to destination upon which one of the buses a data packet is to be transmitted from one access unit. A request flag is then transmitted on the second bus when the one access unit has a data packet for transmission on the first bus. A request flag counter is incremented at the one access unit each time a request flag is detected by the one access unit on the second bus from access units upstream of the one access unit on the second bus. The counter is decremented each time an empty data packet is detected by the one access unit on the first bus and the data packet is transmitted from the one access unit on the first bus in accordance with the count of said counter.

496732

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