Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Patent
1995-09-11
1997-02-11
Kizuo, Hassan
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
370412, H04J 314, H04L 1256
Patent
active
056028300
ABSTRACT:
A method and an apparatus implementing a shaping function in a fixed length cell switching network node adapter supporting output lines in a telecommunication network. The adapter includes a Time Division Multiplexing (TDM) table where each entry is a pointer to a first cell of a queue of cells stored in the adapter for a given traffic. When a new traffic is established, the TDM table is updated. A placement device performs the pre-computation of the best placement of the entries reserved for one traffic in the TDM table. The placement device minimizes the Cell Delay Variation as computed by a Generic Cell Rate Algorithm (GCRA--ITU standard organization) policer. The Cell Delay Variation (CDV) is defined as the deviation of the placement of the cells from their ideal position in an output stream, the ideal placement being when the cells are spaced with an interval corresponding to the period of traffic negotiated at traffic establishment time. The preferred embodiment includes a scheduler which reads the TDM table and fetches the corresponding cell in the queue storage to send the cell onto the output line via a line interface unit.
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Fichou Aline
Foriel Pierre-Andre
Galand Claude
International Business Machines - Corporation
Kizuo Hassan
Woods Gerald R.
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