The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1996
Filed:
Dec. 23, 1993
Larry L Byers, Apple Valley, MN (US);
Donald M Davies, Shoreview, MN (US);
Joseba M Desubijana, Minneapolis, MN (US);
Michael E Mayer, Rudyard, MN (US);
Randall L Piper, Plymouth, MN (US);
Lloyd E Thorsbakken, Blaine, MN (US);
Steven M Wierdsma, Andover, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A system for communicating data between a main processor and a peripheral processor over a fiber optic interface. The interface is a dedicated, point-to-point link operating in full-duplex, asynchronous mode. Dual fibers and physical layer controllers are used in a cascaded fashion to double the throughput of the interface. Frame control logic coordinates formatting of data into frames for transmission over the interface. Frame format and interface protocol are based on FDDI, but are improved to more efficiently transfer data in a point-to-point implementation. Frame Check Sequences are generated and verified to ensure error-free data transfers. Frame sending and frame receiving logic communicate with the main and peripheral processors, accepting data transfer requests and forwarding received data.