Method and system for performing an asymmetric bus arbitration p

Details Method and system for performing an asymmetric bus arbitration p Method and system for performing an asymmetric bus arbitration p

1995-12-14

1997-11-25

Ray, Gopal C.

Multiplex communications

Wide area network

Packet switching

395293, 395728, 370462, G06F 1336

Patent

active

056921357

ABSTRACT:
An arbitration protocol, preferably known as data-valid extended (DVE) protocol, for determining which one of the two units within a computer system may obtain access to a common bus is described. The DVE protocol is based on a point-to-point communication between two peer units. The DVE protocol is a physical level signalling convention for controlling switch communications on bi-directional address buses and data buses in a boundary-latched synchronous environment. The DVE protocol is asymmetric, yet fair, and is designed to minimize the number of cycles spent (or latency) in accessing the address or data buses and to maximize the number useful cycles (or bandwidth) on the address buses as well as the data buses. The asymmetry of the DVE protocol reduces the number of cycles spent in arbitration to zero for any data transfer size greater than one.

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