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:
Mar. 13, 2012
Filed:
Feb. 20, 2004
Wataru Imajuku, Kanagawa, JP;
Katsuhiro Shimano, Kanagawa, JP;
Yoshihiro Takikawa, Kanagawa, JP;
Eiji Oki, Tokyo, JP;
Yasutaka Okazaki, Kanagawa, JP;
Wataru Imajuku, Kanagawa, JP;
Katsuhiro Shimano, Kanagawa, JP;
Yoshihiro Takikawa, Kanagawa, JP;
Eiji Oki, Tokyo, JP;
Yasutaka Okazaki, Kanagawa, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
In a disclosed backup path bandwidth keeping method for keeping bandwidth of a backup path to which an active path is switched when the active path becomes unavailable in nodes of a communication network, each node is connected to the same destination, and the method includes a backup path bandwidth keeping phase, for M (M is a natural number equal to or less than L) channels in L (L is a natural number) channels kept as backup path bandwidth, for notifying a destination-side node existing in a destination side of the backup path of identification number information of the M channels to be kept and identification information indicating that a path for which the bandwidth is to be kept is a backup path.