Silicon Graphics, Incorporated

Terawave Communications, Inc.

Jamie Riotto

Steven C Miller

James E Tornes

Ross G Werner

Edward Wayne Boyd

Robert J Deri

Daniel Yau

Barry A Perkins

Wai Y Kan

A technique to identify a response cell in a ranging grant procedure is disclosed herein. The format of the response cell reduces the probability of erroneous response cell detection. The response cell is a conventional ATM cell whose payload includes multiple cell delineation bytes (CDBs).

Ranging cell detection in a noisy environment

A novel packet switched routing architecture for establishing multiple, concurrent communications between a plurality of devices. Any number of devices are coupled to a central packet switched router via links. Due to the nature of these tightly coupled links, high data rates can be achieved between devices and the packet switched router with minimal pins. Any device can communicate to any other device via the packet switched router. The packet switched router has the capability of establishing multiple communication paths at the same time. Hence, multiple communications can occur simultaneously, thereby significantly increasing the overall system bandwidth.

Packet switched router architecture for providing multiple simultaneous communications

The present invention discloses a novel arbitration procedure for selecting among devices in a computer system requesting access to a single resource such as, for example, a system bus or main memory. The arbitration procedure provides an efficient means for guaranteeing the available system bus bandwidth to devices having high bandwidth requirements. Each device can be allotted a certain amount of bandwidth that is guaranteed to be available for that device within a given time interval. Excess bandwidth not consumed by the guaranteed allotments can be used as remainder (e.g., available but not guaranteed) bandwidth by the devices. The arbitration procedure further provides a guaranteed maximum latency so that no device is prevented from completing data transfers in a timely manner. The arbitration procedure still further provides the ability to dynamically program the amount of the bandwidth that is guaranteed a particular device. The arbitration procedure can be applied to a number of different communication platforms and bus protocols.

Guaranteed bandwidth allocation method in a computer system for

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Montara, CA, United States of America

Jamie Riotto