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:
Jan. 03, 2012
Filed:
Aug. 04, 2006
Masahiko Mizutani, Yokohama, JP;
Atsushi Iwamura, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Masayuki Takase, Fujisawa, JP;
Hideki Endo, Kokubunji, JP;
Masahiko Mizutani, Yokohama, JP;
Atsushi Iwamura, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Masayuki Takase, Fujisawa, JP;
Hideki Endo, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a multicast path management method for a connectionless communication. Also provided is a path protection function which is effective when a path has failed. A network is formed by a trunk and a branch path. The multicast path is managed by end-to-end and when a failure has occurred, an instruction is issued from the apex of the multicast tree to respective end-to-end paths so as to switch from the currently used channel to a backup path. Thus, upon failure, an individual path protection can be performed without affecting other parts of the tree to which the same multicast flow as the defective path is distributed or the distribution state of the multicast flow.