Standard Microsystems Corporation

Vertex Networks, Inc.

Eric Fuh

John Ta

Martin Chen

John Lam

Philip Chan, Deceased

Min P Tan

Frank Huang

Philip Tze-Tak Chan

Min Paul Tan

A cell scheduling method and apparatus are described in which cells are efficiently scheduled in four steps. In a first step, a VC is selected for servicing and serviced if necessary. In a second step, cells from the serviced VCs are scheduled for transmission. In a third step, jitter is controlled. In a fourth step, final departure of cells is scheduled.

ATM cell scheduling method and apparatus

A high speed data communication controller comprising two independent central processing units, each having its own independent program instruction fetch data path, and instruction execution data path. The data communication controller includes a dual-port serial communication subsystem and a bus interface unit operably associated with a four channel DMA controller. One central processing unit is assigned the task of handling the medium access control (MAC) layer function of a multilayered local area network protocol, while the other central processing unit handles host commands and buffer memory management functions associated with the transmission and reception of packets relating to the higher layer protocol. As a result of the present invention, efficient data communication processing is achieved within a single VSLI chip, thereby improving node and network data throughout.

Communications controller utilizing an external buffer memory with

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Irvine, CA, United States of America

Eric Fuh