Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2006-06-27
2006-06-27
Phan, Hanh (Department: 2638)
Optical communications
Multiplex
Broadcast and distribution system
C398S071000, C398S070000, C398S066000, C398S067000, C398S068000, C398S074000, C398S075000, C398S079000, C398S082000, C398S083000, C398S091000, C398S098000, C398S100000, C398S059000, C455S003010, C455S001000, C455S001000, C455S001000, C370S421000, C370S422000, C370S424000, C370S460000
Reexamination Certificate
active
07068937
ABSTRACT:
This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node. The mux-node may route upstream communication signals received from the mini-fiber nodes as downstream signals to other mini-fiber nodes also connected to the mux-node without head-end interaction.
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Combs Charles D.
Darcie Thomas Edward
Desai Bhavesh N.
Gnauck Alan H.
Lu Xiaolin
AT&T Corp.
Phan Hanh
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