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:
Dec. 17, 2013
Filed:
Dec. 22, 2008
Masayuki Kashima, Tokyo, JP;
Masayuki Kashima, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A passive optical network communication system includes a number of subscribers' units connected to a central line termination unit through a passive optical coupler. The line termination unit includes a first section that transmits and receives a code division multiplex (CDM) signal, a second section that transmits and receives a time division multiplex (TDM) signal, and a wavelength multiplexing filter that combines the transmitted CDM and TDM signals into a single downstream optical signal, and separates the CDM and TDM components of an upstream signal received from the subscribers' units through the passive optical coupler. The CDM signal provides channels for digital video transmission to CDM-capable subscribers' units.