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. 19, 2013
Filed:
Jul. 16, 2009
Koji Wakayama, Kokubunji, JP;
Hiroki Ikeda, Hachioji, JP;
Michitaka Okuno, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Koji Wakayama, Kokubunji, JP;
Hiroki Ikeda, Hachioji, JP;
Michitaka Okuno, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is an optical access system, including: an optical line terminal, a plurality of optical network units and an optical switching unit. The optical line terminal sends to the optical switching unit a control frame including a switching time when the optical switching unit is to make a switch from one of the optical communication paths between the optical line terminal and the plurality of optical network units to another, and an identifier of an optical communication path to which the switch is made in order to switch the optical communication paths between the optical line terminal and the plurality of optical network units. The optical switching unit switches the optical communication paths between the optical line terminal and the plurality of optical network units based on the switching time and the identifier of the optical communication path after switching which are included in the control frame.