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:
Sep. 10, 2024
Filed:
Feb. 28, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Nobuhiro Shibata, Musashino, JP;
Hideo Kawata, Musashino, JP;
Hideaki Kimura, Musashino, JP;
Shinichi Yoshihara, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An object is to provide a communication system, a communication method, a transmission-side switching device, a reception-side switching device, and a program that can carry out network switching of a plurality of L2NWs with a short communication disconnection time without limiting topology. A transmission-side accommodation SW duplicates a frame received from a transmission-side user device and transfers the frame to a plurality of L2NWs to which the transmission-side accommodation SW is connected. When receiving a frame from any one of the plurality of L2NWs to which a reception-side accommodation SW is connected, the reception-side accommodation SW transfers, to a reception-side user device, only a frame from one L2NW allowed to transfer a frame to an access accommodation port and discards frames from the other L2NWs. At a switching time of the L2NWs, the reception-side accommodation SW changes the L2NW allowed to transmit a frame to the access accommodation port.