Multiplex communications – Data flow congestion prevention or control
Patent
1995-12-06
1997-09-16
Ton, Dang
Multiplex communications
Data flow congestion prevention or control
H04J 116
Patent
active
056687974
ABSTRACT:
A device for identifying cells as either conforming or non-conforming in a cell-based transmission system, which includes an n-bit word-length counter having an input coupled to a source of clock pulses, a parallel n-word gate coupled to a parallel output of the n-bit word length counter and having a gate input coupled to a source of cell arrival signals. A processor is coupled to an output of gate having a first comparer for comparing TAT and t.sub.a (k), a second comparer for comparing t.sub.a (k)[n-1] with zero and t.sub.a (k-1)[n-1] with 1, a setting device for setting TAT=t.sub.a (k) in the event that either of the comparisons in the first and second comparers are true. A third comparer is provided for comparing TAT and t.sub.a (k)+L and if TAT is less than or equal to t.sub.a (k)+L, an indexing device for indexing TAT by I and declaring the cell conforming, and an output device for declaring the cell non-conforming if TAT is greater than t.sub.a (k)+L.
REFERENCES:
patent: 5247439 (1993-09-01), Gurmu et al.
ITU-T Recommendation I.371 dated Mar. 1993, entitled: Integrated Services Digital Network (ISDN) Overall Network Aspects and Functions Traffic Control and Congestion Control in B-ISDN.
Bradshaw John Richard
Fahmi Maher Nihad
PMC-Sierra Inc.
Ton Dang
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