Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2011-07-12
2011-07-12
Li, Shi (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
Reexamination Certificate
active
07978975
ABSTRACT:
Implementations of the present principles include methods, systems and apparatuses for transmitting data through a sub-carrier multiplexing and orthogonal frequency-division multiple access passive optical network. In accordance with aspects of the present principles, a plurality of optical network units are assigned electrical carrier frequency bandwidths that are narrower than a system capacity bandwidth. Modulation of optical waves transmitted between an optical line terminal and each optical network unit is conducted on different orthogonal sub-carrier frequencies within the assigned bandwidths such that sampling of said orthogonal sub-carrier frequencies is limited to the assigned electrical carrier frequency bandwidths. The waves are thereafter received and demodulated for the extraction of data.
REFERENCES:
W. Wei et al., “Optical Orthogonal Frequency Division Multiple Access (OFDMA)-Based Optical Access/Metro Ring Networks”, OFC 2008, Feb. 24-28, 2008.
W. Wei et al., “MAC Protocols for Optical Orthogonal Frequency Division Multiple Access (OFDMA)-Based Passive Optical Netowrks”, OFC 2008, Feb. 24-28, 2008.
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Hu Junqiang
Ji Philip Nan
Qian Dayou
Wang Ting
Bitetto James
Kolodka Joseph
Li Shi
NEC Laboratories America, Inc.
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