Fully protected broadcast and select all optical network
First Claim
1. An all optical network for optical signal traffic, comprising:
- a first ring with at least a first clockwise fiber, a second counter-clockwise fiber and a plurality of network nodes;
each node including at least a WDM transponder that includes a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction;
the line-side receiver including a fixed or a tunable optical wavelength filter;
at least a first add and a first drop broadband or narrowband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in each fiber; and
a first coupler pair including first and second couplers in each network node, the first coupler having first and second output ports and a first input port coupled to a line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first coupler enabling the line-side transmitter to launch signals to both the clockwise and counter-clockwise fibers;
the second coupler having first and second input ports and a first output port coupled to a line-side receiver, the first input port being coupled to the clockwise fiber and the second input port coupled to the counter-clockwise fiber;
the second coupler enabling the line-side receiver to receive signals from both the clockwise and counter-clockwise fibers.
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Accused Products
Abstract
An all optical network for optical signal traffic provides at least a first ring with at least a first clockwise fiber, a second counter-clockwise fiber and a plurality of network nodes. Each node has at least a WDM transponder that with a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction. The line-side receiver includes a fixed or a tunable optical wavelength filter. At least a first add and a first drop broadband couplers are positioned on each fiber. Each coupler has first and second ports for through traffic and a third port for adding or dropping local traffic. The first add and first drop broadband couplers are configured to minimize a pass-through loss in each fiber. If there are multiple WDM transponders, their wavelengths are added to the ring either in series or in parallel. All wavelengths dropped from the ring are selected by each individual WDM transponder in a parallel or serial manner.
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Citations
59 Claims
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1. An all optical network for optical signal traffic, comprising:
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a first ring with at least a first clockwise fiber, a second counter-clockwise fiber and a plurality of network nodes;
each node including at least a WDM transponder that includes a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction;
the line-side receiver including a fixed or a tunable optical wavelength filter;
at least a first add and a first drop broadband or narrowband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in each fiber; and
a first coupler pair including first and second couplers in each network node, the first coupler having first and second output ports and a first input port coupled to a line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first coupler enabling the line-side transmitter to launch signals to both the clockwise and counter-clockwise fibers;
the second coupler having first and second input ports and a first output port coupled to a line-side receiver, the first input port being coupled to the clockwise fiber and the second input port coupled to the counter-clockwise fiber;
the second coupler enabling the line-side receiver to receive signals from both the clockwise and counter-clockwise fibers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An all optical network for optical signal traffic, comprising:
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a first ring with at least a clockwise and a counter-clockwise fiber and a plurality of network nodes;
each node including at least a WDM transponder that includes a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction;
the line-side receiver including a fixed or a tunable optical wavelength filter;
at least a first add and a first drop broadband or narrowband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in each fiber; and
a first off-ring switch pair including first and second switches, the first switch having first and second output ports and a first input port coupled to the line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first switch enabling the line-side transmitter to launch signals to either the clockwise or counter-clockwise fibers, the second switch having first and second input ports and a first output port coupled to the line-side receiver, the first input port being coupled to the clockwise fiber and the second input port being coupled to the counter-clockwise fiber;
the second switch enabling the line-side receiver to receive signals from either the clockwise or counter-clockwise fiber. - View Dependent Claims (35, 37)
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36. The network of 35, wherein the one or more WDM transponders are combined in parallel or in series after the pair of switches.
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38. An all optical network for optical signal traffic, comprising:
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a first ring with at least a clockwise and a counter-clockwise fibers and a plurality of network nodes;
at least a first add and a first drop broadband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in each fiber; and
a working WDM transponder coupled to the first ring, the working WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the working WDM transponder being coupled to a receiver and a transmitter of the working client side equipment respectively;
a protection WDM transponder coupled to the first ring, the protection WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the protection WDM transponder being coupled to a receiver and a transmitter of the protection client side equipment respectively. at least a first add and a first drop broadband or narrowband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in the counter-clockwise fiber; and
first and second coupler pairs, each pair including first and second couplers, the first coupler pair coupled to the working WDM transponder and the second coupler pair coupled to the protection WDM transponder, the first coupler having first and second output ports and a first input port coupled to the WDM transponder line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first coupler enabling the WDM transponder line-side transmitter to launch signals to both the clockwise and counter-clockwise fibers, the second coupler having first and second input ports and a first output port coupled to the WDM transponder line-side receiver, the first input port being coupled to the clockwise fiber and the second input port being coupled to the counter-clockwise fiber;
the second coupler enabling the WDM transponder line-side receiver to receive signals from both the clockwise and counter-clockwise fibers. - View Dependent Claims (39, 40, 41)
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42. An all optical network for optical signal traffic, comprising:
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a first ring with at least a first clockwise and a second counter-clockwise fibers and a plurality of network nodes;
at least a first add and a first drop broadband or narrowband couplers positioned on each fiber, each coupler having first and second ports for through traffic and a third port for adding or dropping local traffic, the first add and first drop broadband couplers being configured to minimize a pass-through loss in each fiber;
a working WDM transponder coupled to the first ring, the working WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the working WDM transponder connected back to back to a receiver and a transmitter of working client equipment respectively;
a protection WDM transponder coupled to the first ring, the protection WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the protection WDM transponder coupled to a receiver and a transmitter of the protection client side equipment respectively;
first and second coupler pairs, each pair including first and second couplers, the first coupler pair coupled to the working WDM transponder and the second coupler pair coupled to the protection WDM transponder, the first coupler having first and second output ports and a first input port coupled to the WDM transponder line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first coupler enabling the WDM transponder line-side transmitter to launch signals to both the clockwise and counter-clockwise fibers, the second coupler having first and second input ports and a first output port coupled to the WDM transponder line-side receiver, the first input port being coupled to the clockwise fiber and the second input port being coupled to the counter-clockwise fiber;
the second coupler enabling the WDM transponder line-side receiver to receive signals from both the clockwise and counter-clockwise fibers;
a 1×
2 coupler configured to launch client optical signals to the WDM working transponder and the WDM protection transponder; and
a 1×
2 coupler configured to permit client equipment to receive signals from either the working WDM transponder or the protection WDM transponder, wherein a client-side transmitter on the WDM equipment is turned off to reduce coherent crosstalk and interference. - View Dependent Claims (43, 44, 45)
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46. An all optical network for optical signal traffic, comprising:
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a first ring with at least a first clockwise and a second counter-clockwise fibers and a plurality of network nodes;
at least a first add and a first drop broadband or narrowband couplers coupled to each fiber, each coupler having first and second ports for through traffic and a third port for adding traffic to or from each fiber, the first add and first drop broadband couplers being positioned on each fiber and configured to minimize a pass-through loss in each fiber;
a working WDM transponder coupled to the first ring, the working WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the working WDM transponder connected back to back to a receiver and a transmitter of working client equipment;
a protection WDM transponder coupled to the first ring, the protection WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the protection WDM transponder coupled to a receiver and a transmitter of the protection client side equipment;
first and second switch pairs, each pair including first and second switches, the first switch pair coupled to the working WDM transponder and the second switch pair coupled to the protection WDM transponder, the first switch having first and second output ports and a first input port coupled to the WDM transponder line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first switch enabling the WDM transponder line-side transmitter to launch signals to either the clockwise or counter-clockwise fibers, the second switch having first and second input ports and a first output port coupled to the WDM transponder line-side receiver, the first input port being coupled to the clockwise fiber and the second input port being coupled to the counter-clockwise fiber;
the second switch enabling the WDM transponder line-side receiver to receive signals from either the clockwise or counter-clockwise fibers;
- View Dependent Claims (47, 48, 49, 50, 51)
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52. An all optical network for optical signal traffic, comprising:
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a first ring with at least a first clockwise and a second counter-clockwise fibers and a plurality of network nodes;
at least a first add and a first drop broadband or narrowband couplers coupled to each fiber, each coupler having first and second ports for through traffic and a third port for adding traffic to or from each fiber, the first add and first drop broadband couplers being positioned on each fiber and configured to minimize a pass-through loss in each fiber;
a working WDM transponder coupled to the first ring, the working WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the working WDM transponder connected back to back to a receiver and a transmitter of working client equipment respectively;
a protection WDM transponder coupled to the first ring, the protection WDM transponder including a line-side transmitter and a client-side receiver in a first direction, and a line-side receiver and a client-side transmitter in an opposing second direction, the client side transmitter and the client side receiver of the protection WDM transponder coupled to a receiver and a transmitter of the protection client side equipment respectively;
first and second switch pairs, each pair including first and second switches, the first switch pair coupled to the working WDM transponder and the second switch pair coupled to the protection WDM transponder, the first switch having first and second output ports and a first input port coupled to the WDM transponder line-side transmitter, the first output port being coupled to the clockwise fiber and the second output port being coupled to the counter-clockwise fiber;
the first switch enabling the WDM transponder line-side transmitter to launch signals to either the clockwise or counter-clockwise fibers, the second switch having first and second input ports and a first output port coupled to the WDM transponder line-side receiver, the first input port being coupled to the clockwise fiber and the second input port being coupled to the counter-clockwise fiber;
the second switch enabling the WDM transponder line-side receiver to receive signals from either the clockwise or counter-clockwise fibers;
a 1×
2 coupler configured to launch client optical signals to the WDM working transponder and the WDM protection transponder; and
a 1×
2 coupler configured to permit client equipment to receive signals from either the working WDM transponder or the protection WDM transponder, wherein a client-side transmitter on the WDM equipment is turned off to reduce coherent crosstalk and interference. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59)
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Specification