OPTICAL NETWORK NODE DEVICE
First Claim
1. An optical network node device, comprising:
- a plurality of 4-terminals ROADM, which controls a wavelength division multiplexing (WDM) channel to pass through, drop, or pass through after adding an optically converted signal to the WDM channel;
optical transceivers, which photoelectrically convert a signal dropped from a corresponding ROADM or optically convert an electric signal transmitted to a corresponding ROADM; and
an electrical cross connect switch, which switches the signal that is photoelectrically converted by the optical transceiver to one of optical transceivers corresponding to a direction that the signal will pass through, by redistributing transmission capacity and cross connecting the signal so that the signal is transmitted to a corresponding ROADM.
1 Assignment
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Accused Products
Abstract
Provided is an optical network node device. According to the optical network node device, a planar lightwave circuit (PLC) based or a blocker based 4-terminals ROADM can be used in a node of at least degree 3, a proceeding direction of a wavelength channel can be changed in an electrical cross connect switch, and transmission in a unit smaller than a wavelength channel can be cross connected, dropped, and added, or transmission capacity can be redistributed in the electrical cross connect switch. Accordingly, efficient transmission in a small capacity and large capacity transmission of a wavelength channel can be performed simultaneously, and thus an optical network can be effectively managed. Also, since the node of at least degree 3 uses the PLC based or a blocker based reconfigurable optical add drop multiplexer (ROADM), the node of at least degree 3 can use the same ROADM module as a node of degree 2. Accordingly, the optical network node device has an advantage in manufacturing and managing a node.
24 Citations
14 Claims
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1. An optical network node device, comprising:
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a plurality of 4-terminals ROADM, which controls a wavelength division multiplexing (WDM) channel to pass through, drop, or pass through after adding an optically converted signal to the WDM channel; optical transceivers, which photoelectrically convert a signal dropped from a corresponding ROADM or optically convert an electric signal transmitted to a corresponding ROADM; and an electrical cross connect switch, which switches the signal that is photoelectrically converted by the optical transceiver to one of optical transceivers corresponding to a direction that the signal will pass through, by redistributing transmission capacity and cross connecting the signal so that the signal is transmitted to a corresponding ROADM. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical network node device, comprising:
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a plurality of 4-terminals ROADM, which controls a wavelength division multiplexing (WDM) channel to pass through, drop, or pass through after adding a part of an optically converted signal to the WDM channel; optical transceivers, which photoelectrically convert a part of a signal dropped from a corresponding ROADM or optically convert an electric signal transmitted to a corresponding ROADM; and an electrical cross connect switch, which switches the signal that is photoelectrically converted by the optical transceiver to one of optical transceivers corresponding to a direction that the signal will pass through, by redistributing transmission capacity and cross connecting the signal so that the signal is transmitted to a corresponding ROADM, wherein the ROADM outputs another part of the signal, excluding the part of the dropped signal and the part of the added signal, to outside of the optical network node device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification