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:
Nov. 21, 2023
Filed:
Jan. 23, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Yuki Miyoshi, Musashino, JP;
Ichiro Kudo, Musashino, JP;
Hiroshi Osawa, Musashino, JP;
Hiroshi Suzuki, Musashino, JP;
Takeaki Nishioka, Musashino, JP;
Yuhei Hayashi, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A continuity checking apparatus generates a continuity checking packet to which a predetermined flag and user attributes are assigned and transmits the generated continuity checking packet to an edge router connected to a service that is an entrance of a service chain. Each service transmits an arrival message with respect to the continuity checking packet to the continuity checking apparatus upon reception of the continuity checking packet to which the predetermined flag is assigned. In addition, each service transfers the continuity checking packet to a next service device of the service chain on the basis of the user attributes assigned to the received continuity checking packet. The continuity checking apparatus identifies a path representing service devices through which the continuity checking packet passes on the basis of the arrival message transmitted from each service, and determines whether the identified path is the same as a path of the service chain that is a continuity checking target.