Systran Corporation

Next Generation Systems, Inc.

Nathan Andrew Kragick

James A Cunningham

Gary G Warden

Systems and methods for providing fractional bandwidth communication channels in classes of service that do not normally support these types of channels. In one embodiment, a method comprises receiving one or more frames, wherein each frame contains non-QoS header information, classifying the one or more frames based on the corresponding non-QoS header information and scheduling delivery of the one or more frames based upon corresponding frame classifications, wherein frames in classifications corresponding to QoS circuits are scheduled in a manner that meets QoS requirements associated with the QoS circuits. When the frames are classified, they are forwarded to dynamically allocated queues corresponding to the respective classifications. Frames are scheduled for delivery from the queues according to a modified bin-filling algorithm that is designed to meet the QoS requirements of the respective circuits. This method may be implemented, for example, in a Fibre Channel Classor Classfabric.

Systems and methods for providing quality of service (QoS) in an environment that does not normally support QoS features

A pseudo dual port memory is constructed using a zero bus turnaround random access memory (RAM) wherein data words stored in the RAM each make up a plurality of data words for the pseudo dual port memory. Words written to the dual port memory are accumulated to assemble a single RAM word which is written into an addressed location within the RAM. Words read from the RAM correspondingly make up a plurality of data words for the dual port memory and are stored and multiplexed out as individual words. In the illustrated embodiment, each RAM word comprises two dual port memory words; however, other multiples, preferably powers of 2, can be used in the present invention such that each RAM word can comprise 4, 8, 16, etc. dual port memory words.

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Beavercreek, OH, United States of America

Nathan Andrew Kragick