Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2011-04-05
2011-04-05
Liu, Li (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S063000, C398S098000, C398S099000, C398S100000, C398S101000, C398S102000
Reexamination Certificate
active
07920791
ABSTRACT:
Regarding the passive optical network (PON) system of the present invention, in an OLT, data of different bit rates is framed, and framed data rows are subjected to FEC encoding processing without changing the line up of the data, and a check bit is added to the end of the frame, and an optical signal that has been modulated in accordance with the data row to which the check bit has been added is transmitted to the optical transmission line. Then in an ONU that corresponds to a high speed bit rate to which an optical signal from the OLT has been applied via a power splitter, forward error correction of the reception data is performed. As a result in a PON system in which data of different bit rates coexist, the minimum reception rate of a high speed ONU can be improved without having an influence on a low speed ONU.
REFERENCES:
patent: 7653312 (2010-01-01), Mori
patent: 2005/0069318 (2005-03-01), Lee et al.
patent: 2006/0133809 (2006-06-01), Chow et al.
patent: 2008/0002977 (2008-01-01), Mori
patent: 2005-033537 (2005-02-01), None
Mori Kazuyuki
Sakai Yoshio
Fujitsu Limited
Liu Li
Staas & Halsey , LLP
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