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. 06, 2010
Filed:
Sep. 12, 2007
Tetsuya Nishi, Kawasaki, JP;
Tetsuya Nishi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In accordance with an instruction from a network monitoring device (), a transmission terminal (T) serving as a source of video information transmits a certain amount of monitoring test packets differentiated from the usual multicast frames. Pass status information (for example, MIB information) generated by routers () receiving and passing through the continuous test packets is collected at the network monitoring device (). The device () uses the collected pass status information and topology information which the device () holds by itself so as to judge the direction of transmission of the test packets at the interface of each router () and specifies the multicast tree based on the results of judgment.