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:
Apr. 05, 2011
Filed:
May. 31, 2006
Masahiro Sakauchi, Tokyo, JP;
Daisaku Ogasahara, Tokyo, JP;
Masahiro Sakauchi, Tokyo, JP;
Daisaku Ogasahara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Nodesandhave the same address. Upon reception of a broadcast packet whose TTL value is not zero from a ringlet, a forwarding circuitof each of the nodesandcopies and transits the packet, and an address tableof each node learns the address based on the copied broadcast packet. Upon reception of a unicast packet whose destination is an address common to the two nodes from the ringlet, the forwarding circuitof one nodecopies and transits the packet, while the forwarding circuitof the other nodestrips the packet, and each address tables learns the address. A filter circuit of the nodeprohibits the passage of the packet from the ringlet