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:
May. 13, 2014
Filed:
Nov. 09, 2009
Tohru Kazawa, Kokubunji, JP;
Akihiko Tsuchiya, Fujisawa, JP;
Norihiro Sakamoto, Chigasaki, JP;
Yusuke Yajima, Fujisawa, JP;
Masatoshi Takihiro, Yokohama, JP;
Tohru Kazawa, Kokubunji, JP;
Akihiko Tsuchiya, Fujisawa, JP;
Norihiro Sakamoto, Chigasaki, JP;
Yusuke Yajima, Fujisawa, JP;
Masatoshi Takihiro, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a passive optical network system for operating a mixture of PONs with differing transmission speeds and is capable of reducing power consumption on the basis of the amount of signals being transmitted. The master station of the passive optical network system, which determines the amount and timing of signals sent thereto by each of a plurality of slave stations on the basis of the requests of the plurality of slave stations and receives signals from the plurality of slave stations via an optical fiber network, is equipped with a control unit that determines in each set cycle the amount, transmission timing, and transmission speed of the signals that each slave station is permitted to transmit to said master station on the basis of the amount of signals that each of the plurality of slave stations has requested to transmit, and that notifies such to each slave station. Additionally, each of the plurality of slave stations is equipped with a control unit that transmits signals to the master station at a first transmission speed or a second transmission speed that is faster than the first transmission speed, and is configured to transmit signals with either the first transmission speed or the second transmission speed on the basis of notifications from the master station.