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:
Dec. 01, 1992
Filed:
Mar. 04, 1992
Toshimitsu Ohba, Kawasaki, JP;
Shigehiro Hayashi, Owariasahi, JP;
Fujitsu Ltd., Kawasaki, JP;
Abstract
An internetwork communication system provides communication from a first local area network to a second, ring-type, local area network via a bridge. The bridge receives a frame from the first local area network and transmits a dummy frame followed by a transfer frame to the second local area network. The transfer frame defines a node of the second local area network as a distant apparatus (receiver) and a node of the first local area network as a self apparatus (sender). The bridge later receives the dummy frame from the second local area network, after transmission of the dummy frame around the ring, and deletes the dummy frame and the transfer frame received following the dummy frame so that the communication in the second local area network does not circulate indefinitely around the ring. As an alternative to using a dummy frame, the bridge can receive the transfer frame, after circulation around the second local area network, and compare the distant apparatus of the received internetwork transfer frame with a stored distant apparatus address. When the received distant apparatus address matches the stored distant apparatus address, the bridge deletes the transfer frame from the second local area network.