Roadm transponder aggregator systems and methods of operation
AssigneeNEC Laboratories America, Inc.
InventorsPHILIP N. JI, Yoshiaki Aono, Ting Wang
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Abstract
ROADM node systems and methods of operation are disclosed. ROADM node systems may include transponder aggregators including transponders to add signals for switching through the ROADM node. The transponder aggregators may be constrained from adding signals on adjacent channels for simultaneous use. Further, the transponder aggregators may include an optical coupler in lieu of an optical multiplexer. The ROADM system may include a set of wavelength selective switches associated with output ports that can provide an additional filtering function for the added signals prior to transmission on a WDM network.
Claims20
A method for managing signals in a wavelength-division multiplexing (WDM) network implemented in a reconfigurable optical add-drop multiplexer (ROADM) node comprising:
- adding a first set of signals via a first plurality of transponders within a first transponder aggregator to switch through the ROADM node such that the adding is constrained from adding signals on adjacent, pre-defined channels for simultaneous use;
- adding a second set of signals via a second plurality of transponders within a second transponder aggregator to switch through the ROADM node such that at least a portion of the second set of signals is on at least one channel that is adjacent to a channel including any of the signals in the first set of signals;
- and
- transmitting the first and second sets of signals from the ROADM node on corresponding channels.
A reconfigurable optical add-drop multiplexer (ROADM) node system for managing signals in a wavelength-division multiplexing (WDM) network comprising:
- a plurality of transponder aggregators, wherein each transponder aggregator comprises:
- a plurality of transponders configured to add signals on a subset of channels from a pre-defined set of channels to switch through the ROADM node,
- wherein at least one of the transponder aggregators is of a first type in which transponders are constrained from adding signals on adjacent, pre-defined channels for simultaneous use, and
- wherein at least one other transponder aggregator of the plurality of aggregators is of a second type in which transponders add signals on at least one channel that a transponder aggregator of the first type is constrained from using to switch through the ROADM node.
A transponder aggregator system for use in a reconfigurable optical add-drop multiplexer (ROADM) node for managing signals in a wavelength-division multiplexing (WDM) network comprising:
- a plurality of transponders configured to add signals on a subset of channels from a pre-defined set of channels to switch through the ROADM node such that the transponders are constrained from adding signals on adjacent channels, from the pre-defined channels, for simultaneous use;
- and
- a switch configured to select signals and corresponding channels to drop to the plurality of transponders.
Dependencies are inferred from the claim text.