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:
Feb. 19, 2013
Filed:
Oct. 20, 2009
Michitaka Okuno, Kokubunji, JP;
Koji Wakayama, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Hiroki Ikeda, Hachioji, JP;
Michitaka Okuno, Kokubunji, JP;
Koji Wakayama, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Hiroki Ikeda, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is an optical access system comprising: an optical line terminal connected to another network; a plurality of optical network units, each connected to a user terminal; and at least one of an optical switching unit and an optical splitter, which is installed between the optical line terminal and the plurality of optical network units. The optical line terminal allocates a length of time to a discovery phase for detecting the plurality of optical network units, and a length of time to data transmission phases for transferring data from the plurality of optical network units; and changes a ratio of the length of time of the discovery phase to the length of time of the data transmission phases so that the length of time of the discovery phase is shortened in the case where a number of the optical network units that are registered in the optical line terminal increase.