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:
Aug. 16, 1977
Filed:
Aug. 11, 1976
Abraham M Gindi, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for synchronizing frame delimited bit stream messages on a high speed loop for communication among storage system elements. The method especially minimizes the time for attaining frame and byte synchronization among terminals attaching storage elements to the loop. The method comprises the steps of (1) synchronizing terminals downstream from a faulty terminal to a first synch reference as generated by the faulty terminal and further (2) synching the terminals upstream therefrom to a second synch pattern generated by the primary terminal responsive to the first reference. As a consequence, the system resynchs as a function of resynching of the faulty station alone. Transmission efficiency is improved by logically assigning for loop attachment only those loop secondary terminals whose storage elements have an aggregate bandwidth less than the available instantaneous loop bandwidth. Further improvement is obtained by dynamically varying the frame assignments. Finally, efficiency is achieved by minimizing the time to acquire and reacquire byte and frame synchrony loss caused when the loop is initially powered on or by transient electrical disturbances.