Motorola Corporation

Codex Corporation

Craig Sheppard Holt

Richard B Kline

Krishnan Ramakrishnan

A method (1200, 1500, 1600, 1700, 1800) and packet switch (500, 600, 700, 1400,1900, 2000) for efficient switching of a plurality of received packets from a plurality of ingress ports to a plurality of egress ports, using the steps of: A) storing the packets in memory; B) sending arrival information for each packet to a destination egress port for the packet; C) storing, in memory at each destination egress port, the arrival information; D) requesting, by each destination egress port, the packets from the packet memory in accordance with a predetermined scheme; and E) sending, by the packet memory, to the destination egress ports, the packets requested.

Efficient output-request packet switch and method

A method and device are provided for efficient switching of multipoint packets in an output request packet switch, the multipoint packets being switched from a plurality of input ports to a plurality of egress ports where at least one packet is to be delivered to at least two destination egress ports.

Method and device for multipoint switching and arbitration in

A FIFO uses a fill indicator circuit to indicate a fill status and provide control signals to a data source and data sink to cease operation. A serial string of FIFO cells propagates data from input to output by sending request and acknowledge signals between adjacent cells. The request signal initiates data transfer to the next logical cell and the acknowledge signal indicates completion of the transfer. The fill indicator has one cell for each FIFO cell for monitoring the request and acknowledge signals looking for predetermined state sequences to indicate whether each FIFO cell is full or empty.

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Cohasset, MA, United States of America

Craig Sheppard Holt