Optical communications – Multiplex – Broadcast and distribution system
Reexamination Certificate
2003-08-13
2010-06-08
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Broadcast and distribution system
C398S071000, C398S070000, C398S066000, C398S067000, C398S068000, C398S074000, C398S075000, C398S079000, C398S082000, C398S083000, C398S091000, C398S098000, C398S099000, C398S100000, C398S059000, C455S001000, C455S001000, C455S003010, C455S001000, C455S001000, C725S121000, C725S127000, C725S129000, C725S105000, C725S106000, C370S422000, C370S424000, C370S425000, C370S460000
Reexamination Certificate
active
07734179
ABSTRACT:
A communication system between head-ends and end-users is provided which expands bandwidth and reliability. A concentrator receives communication signals from a head-end and forwards the received communication signals to one or more fiber nodes and/or one or more mini-fiber nodes. The concentrator demultiplexes/splits received signals for the mini-fiber nodes and the fiber nodes and forwards demultiplexed/split signals respectively. The mini-fiber nodes may combine signals received from the head-end with loop-back signals used for local medium access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and/or fiber node and transmitted to the concentrator. The concentrator multiplexes/couples the mini-fiber node and the fiber node upstream signals and forwards multiplexed/coupled signals to the head-end. Communication signals received from the mini-fiber nodes that are destined to other end-users also connected to the mini-fiber nodes may be routed by the concentrator without head-end interaction.
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Darcie Thomas Edward
Desai Bhavesh N.
Gnauck Alan H.
Lu Xiaolin
Woodward Sheryl Leigh
AT&T Corp.
Phan Hanh
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