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. 20, 1978
Filed:
Oct. 13, 1977
Ernst Hans Rothauser, Reichenburg, CH;
Daniel Wild, Kilchberg, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is disclosed by which several data stations which use a single communication channel, and which are simultaneously ready to transmit a data packet, can send a request for channel allocation, and will be granted the channel each for one data packet transmission, all within one time frame without central control, polling, or collisions. Addresses of all data stations desiring channel allocation are interleaved and superimposed in a specific manner for transmitting the requests, and by observing the resulting common signal, each data station determines when it can send its data packet. An arrangement for a data station is also disclosed which comprises the means necessary for transmitting address characters in an interactive procedure simultaneously with other stations, and for determining the allocated packet time slot.