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:
Jul. 03, 2012
Filed:
Apr. 22, 2008
Wei Jiang, Tokyo, JP;
Wei Jiang, Tokyo, JP;
Yamatake Corporation, Tokyo, JP;
Abstract
The invention can achieve a recovery time that satisfies the demands of real-time transmission processing by performing, in an extremely short time period, an RSTP process in a network, which is configured in a ring topology and wherein a plurality of IEEE 802.3 compliant nodes is connected via prescribed transmission lines, using hardware to execute processes related to the physical layer and the data link layer of the OSI reference model—without software processing. The RSTP processing unit of each node: receives BPDU data, which is received from the network by one of two PHY units and stored in a BPDU send/receive buffer of a corresponding MAC unit that is connected to that PHY unit, via a BPDU data bus that is connected to that MAC unit; decodes the received BPDU data; performs a prescribed process; transfers the BPDU data, via the BPDU data bus that is connected to the other MAC unit, to the other BPDU send/receive buffer; and transmits that BPDU data from the PHY unit connected to the other MAC unit to the network.