Method of controlling access to a buffer and a device for tempor

Details Method of controlling access to a buffer and a device for tempor Method of controlling access to a buffer and a device for tempor

1994-07-12

1996-08-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 856, 370 941, 3701101, H04Q 1104

Patent

active

055463894

ABSTRACT:
Data packets (D1, D2) each assigned to one of at least two priority classes (P1, P2) are stored in a buffer (MEM2) designed to hold data on a threshold value for each priority class wherein, instead of having the threshold fixed for each priority class whereby the data packets of the corresponding priority class will no longer be written into the buffer (MEM2) when the threshold is exceeded ("partial buffer sharing"), one or more thresholds are dynamically controlled. The current loss probability of the highest priority class (P1) is determined, and the threshold (MEM1) of the lowest priority class (P2) is then raised or lowered (REG1). This results in improved buffer utilization in applications which require a given loss probability for high priority classes, and calculation of a threshold value is no longer necessary.

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"Comparative Performance Study of Space Priority Mechanisms for ATM Network", H. Kroner, Proceedings IEEE Infocom '90, The Conference on Computer Communications, Ninth Annual Joint Conference of the IEEE Computer and Communications Societies, Los Alamitos, CA, Jun. 3-7, 1990, pp. 1136-1143.
"Dimensioning of an ATM switch with shared buffer and threshold priority", J. F. Meyer, et al, Computer Networks and ISDN Systems vol. 26, No. 1, 1993, pp. 95-108.

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