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. 14, 1990
Filed:
Jul. 13, 1988
Takuji Hamada, Hitachiota, JP;
Masahiro Takahashi, Hitachi, JP;
Katsuhiko Yoneda, Hitachi, JP;
Masakazu Okada, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In an annular transmitting system including a ring-like transmission path realized by interconnecting serially a plurality of transmission stations in an annular form, at least one of the transmissions stations generating repetitively a transmitting frame constituted by a plurality of transmission units referred to as time slots, the frame being circulated along the transmission path, wherein transmission of information among transmission stations is performed in such a manner in which each of the transmission stations having a request to send information inserts the information in the slots by dividing the information, which information is ultimately fetched by the transmission station destined to receive that information, a multi-slot access system in which each of the time slots is provided with an area indicating whether the associated time slot is 'free' or 'busy', wherein the transmission station having a request to send information determines that the sending of the information is enabled when it is detected that one time slot located at a particular position within the transmitting frame is 'free' or when it is detected that the time slot succeeding immediately to the 'busy' slot is 'free', to thereby set successively those usable time slots which succeed to the detected 'free' time slot to the 'busy' state and insert the information in these usable time slots.