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:
Jul. 14, 2015
Filed:
Nov. 30, 2009
Hideki Endo, Kawasaki, JP;
Taisuke Ueta, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Norio Miyazaki, Fujisawa, JP;
Hideki Endo, Kawasaki, JP;
Taisuke Ueta, Yokohama, JP;
Yoshihiro Ashi, Yokohama, JP;
Norio Miyazaki, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a communication system which is provided with a plurality of communication devices and transfers a packet between the plurality of communication devices through a communication path. When a packet is looped back at any of the communication devices on the communication path to verify connectivity of the communication path, a first communication device of the plurality of communication devices stores, in a first region of header information of the packet, first information for designating the communication device at which the packet is looped back, further stores, in a second region of the header information of the packet, second information on a loopback point in the designated communication device at which the packet is looped back, and sends the packet to which the first information and the second information have been added.