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:
Sep. 27, 2011
Filed:
Feb. 03, 2005
Kenichi Kawarai, Kawasaki, JP;
Hiroyuki Kaneko, Kawasaki, JP;
Kazuyuki Tajima, Kawasaki, JP;
Kou Takatori, Kawasaki, JP;
Kenichi Kawarai, Kawasaki, JP;
Hiroyuki Kaneko, Kawasaki, JP;
Kazuyuki Tajima, Kawasaki, JP;
Kou Takatori, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An arbitrary node that belongs to a virtual LAN sends a request packet including a count value indicating the number of communication hops across nodes to each of its adjacent nodes that belong to the virtual LAN and are adjacent. Upon receiving the request packet, each of the adjacent nodes sends the request packet in which the count value is incremented or decremented to each of its adjacent nodes that belong to the virtual LAN and are adjacent to the node, excluding a sender of the request packet received, and sends a reply packet including the sender's address, an address of the node that is a replying node, and the count value to a given return destination. The return destination collects reply packets sent thereto and keeps track of the topology of the nodes constituting the virtual LAN from information contained in the reply packets.