Wavelength-division-multiplexed network having broadcast capability
First Claim
1. A Wavelength-Division-Multiplexed (WDM) optical network comprisinga first optical apparatus, including an optical splitter, for communicating each of a first set of optical switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) and for communicating an optical broadcast signal to a selected one of the plurality of ONUs andsaid selected ONU connected to a distribution facility which interconnects to one or more of the plurality of ONUs, said selected ONU including means for communicating the optical broadcast signal over the distribution facility to the other one or more of the ONUs.
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Accused Products
Abstract
A Wavelength-Division-Multiplexed (WDM) network provides delivery of both switched services and broadcast analog video over optical facilities through an intermediate optical apparatus (e.g., Passive Optical Network (PON)) splitter to a plurality of remote optical apparatuses (e.g., optical-network units (ONUs)). The broadcast signal is provided to only a selected ONU, together with the switched service signal for that selected ONU, the selected ONU then distributes the broadcast signal to other ONUs over a separate distribution facility interconnecting the ONUs.
119 Citations
17 Claims
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1. A Wavelength-Division-Multiplexed (WDM) optical network comprising
a first optical apparatus, including an optical splitter, for communicating each of a first set of optical switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) and for communicating an optical broadcast signal to a selected one of the plurality of ONUs and said selected ONU connected to a distribution facility which interconnects to one or more of the plurality of ONUs, said selected ONU including means for communicating the optical broadcast signal over the distribution facility to the other one or more of the ONUs.
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14. A Wavelength-Division-Multiplexed (WDM) network comprising
a first optical apparatus, including a Dragone router, for communicating each of a first set of optical signals, transmitted using different optical wavelengths, over a separate optical facility to each of a plurality of second optical apparatuses and for communicating an optical broadcast signal to a selected one of the plurality of second optical apparatuses and said selected second optical apparatus connected to a distribution facility which interconnects to one or more of the plurality of second optical apparatuses, said selected second optical apparatus including means for communicating the optical broadcast signal over the distribution facility to the other one or more of the second optical apparatuses.
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15. A method of operating a Wavelength-Division-Multiplexed (WDM) network comprising the steps of:
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communicating, from a first optical apparatus including an optical splitter, each of a set of optical switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) and communicating an optical broadcast signal to a selected one of the plurality of ONUs and receiving, at a selected ONU of the plurality of ONUs, the broadcast signal and communicating the optical broadcast signal over a separate distribution facility which interconnects the selected ONU to the other one or more of the ONUs.
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16. A first optical apparatus for use in a Wavelength-Division Multiplexed (WDM) network comprising
first means, including an optical splitter, for communicating at one optical wavelength, switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) of the WDM network and second means, including an optical combiner, for communicating a different optical wavelength signal to a selected one of the plurality of ONUs for distribution over a distribution facility to one or more of the ONUs.
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17. A first optical apparatus for use in a Wavelength-Division Multiplexed (WDM) network comprising
first means, including an optical splitter, for communicating switched services signals over a separate optical facility to each of a plurality of Optical Network Units (ONUs) of the WDM network, using a different wavelength for each ONU and second means, including an optical combiner, for communicating a different optical wavelength signal to a selected one of the plurality of ONUs for distribution over a distribution facility to one or more of the ONUs.
Specification