Multiplex communications – Wide area network – Packet switching
Patent
1991-12-16
1994-01-04
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 857, 370 8515, 370 941, 34082505, H04J 316, H04L 1242
Patent
active
052766829
ABSTRACT:
In a communication system comprising several nodes and a scheduler interconnected by a serial transmission medium, data are transmitted in time slots. The scheduler marks time slots either as reserved if nodes have previously made a request and received a confirmation, or it marks time slots as gratis for free use by any node. Slots are also marked gratis if the have reached their destination or removal node. To achieve fairness between nodes in the reservation process, they count gratis slots they used. When making a request for reserving a number NR of slots, a node must also transmit the number NG of gratis slots used. The scheduler then determines, according to a given rule, the number NC of slots to be granted for each node. A special signalling technique is also disclosed for effective transmission of the numbers in the reservation and confirmation process.
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Lemppenau Wolfram
Van As Harmen
Cockburn Joscelyn G.
Hsu Alpus H.
International Business Machines - Corporation
Safourek Benedict V.
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