Node apparatus

Patent metadata

Field	Value
Publication number	US-9515766-B2
Application number	US-201514882107-A
Country	US
Kind code	B2
Filing date	Oct 13, 2015
Priority date	Apr 16, 2013
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The present invention provides a node apparatus, where two N×N wavelength selective switches are used to form a parallel-connected structure, and two ends of each power splitter are separately connected to input ends of the N×N wavelength selective switches, and two ends of each power combiner are separately connected to output ends of the N×N wavelength selective switches, thereby transferring route switching selection work originally performed between multiple 1×M wavelength selective switches to the inside of the N×N wavelength selective switch for implementation. Compared with an original structure using discrete components, the node apparatus is simplified, and when a traffic volume expands, the number of module slots on a line side does not need to be increased, thereby reducing usage costs eventually. The present invention is used for signal transmission in a node.

First claim

What is claimed is:

1. A node apparatus, comprising: a first N×N wavelength selective switch, a second N×N wavelength selective switch, at least one power splitter, and at least one power combiner, wherein:
the first N×N wavelength selective switch and the second N×N wavelength selective switch form a parallel-connected structure, each power splitter has one input end and two output ends, and the two output ends are a first output end and a second output end; the first output end of each power splitter is connected to a different input end of the first N×N wavelength selective switch, and the second output end of each power splitter is connected to a different input end of the second N×N wavelength selective switch; each power combiner has two input ends and one output end, and the two input ends are a first input end and a second input end; and the first input end of each power combiner is connected to one output end of the first N×N wavelength selective switch, and the second input end of each power combiner is connected to one output end of the second N×N wavelength selective switch, wherein N is a natural number greater than 1; and
each power splitter sends, using the first output end, a signal comprising a working service and a backup service to the first N×N wavelength selective switch, each power splitter sends, using the second output end, the signal comprising the working service and the backup service to the second N×N wavelength selective switch, the first N×N wavelength selective switch blocks the backup service in the signal, switches the working service, and sends the working service to the power combiner using the first input end of the power combiner, and the second N×N wavelength selective switch blocks the working service in the signal, switches the backup service, and sends the backup service to the power combiner using the second input end of the power combiner.

2. The node apparatus according to claim 1 , wherein the node apparatus further comprises:
a first transmitter and a first power splitter, wherein
an output end of the first transmitter is connected to an input end of the first power splitter, and output ends of the first power splitter are separately connected to an N th input port of the first N×N wavelength selective switch and an N th input port of the second N×N wavelength selective switch; the first transmitter is configured to send a service signal, so that the service signal enters the first power splitter, and separately enters the N th input port of the first N×N wavelength selective switch and the N th input port of the second N×N wavelength selective switch from the output ends of the first power splitter; and the N th input port of the first N×N wavelength selective switch is an input port other than an input port which is connected to the at least one power splitter, of the first N×N wavelength selective switch, and the N th input port of the second N×N wavelength selective switch is an input port other than an input port, which is connected to the at least one power splitter, of the second N×N wavelength selective switch.

3. The node apparatus according to claim 1 , wherein the node apparatus further comprises:
a first receiver and a first switch, wherein
two input ends of the first switch are separately connected to an N th output port of the first N×N wavelength selective switch and an N th output port of the second N×N wavelength selective switch, an input end of the first receiver is connected to an output end of the first switch, the first receiver is configured to receive a working service signal from the N th output port of the first N×N wavelength selective switch or a backup service signal from the N th output port of the second N×N wavelength selective switch; and the N th output port of the first N×N wavelength selective switch is an output port other than an output port, which is connected to the at least one power combiner, of the first N×N wavelength selective switch, and the N th output port of the second N×N wavelength selective switch is an output port other than an output port, which is connected to the at least one power combiner, of the second N×N wavelength selective switch.

4. The node apparatus according to claim 1 , wherein the node apparatus further comprises:
a second transmitter, a third transmitter, a second receiver, a third receiver, a second power splitter, a third power splitter, a second switch, a third switch, a second 1×L wavelength selective switch, a third 1×L wavelength selective switch, a second 1×R power splitter, and a third 1×R power splitter, wherein
an output end of the second transmitter is connected to an input end of the second power splitter, output ends of the second power splitter are separately connected to one port at an input end of the second 1×L wavelength selective switch and one port at an input end of the third 1×L wavelength selective switch, an output end of the second 1×L wavelength selective switch is connected to an N th port of the first N×N wavelength selective switch, and an output end of the third 1×L wavelength selective switch is connected to an N th port of the second N×N wavelength selective switch; and the second transmitter is configured to send a service signal, wherein the service signal passes through the second power splitter, the second 1×L wavelength selective switch and the third 1×L wavelength selective switch, and enters the first N×N wavelength selective switch and the second N×N wavelength selective switch, wherein L is a natural number greater than 1;
an output end of the third transmitter is connected to an input end of the third power splitter, output ends of the third power splitter are separately connected to one of the remaining ports, other than an occupied port, at the input end of the second 1×L wavelength selective switch, and one of remaining ports, other than an occupied port, at the input end of the third 1×L wavelength selective switch; and the third transmitter is configured to send a service signal, wherein the service signal passes through the third power splitter, the second 1×L wavelength selective switch, and the third 1×L wavelength selective switch, and enters the first N×N wavelength selective switch and the second N×N wavelength selective switch;
an input end of the second 1×R power splitter is connected to an N th output port of the first N×N wavelength selective switch, one port at an output end of the second 1×R power splitter is connected to an input end of the second switch, an output end of the second switch is connected to an input end of the second receiver, and one of remaining ports, other than an occupied port, at the output end of the second 1×R power splitter is connected to an input end of the third switch; and the second receiver is configured to selectively receive, using the second switch, a working service signal from the N th output port of the first N×N wavelength selective switch or a backup service signal from an N th output port of the second N×N wavelength selective switch, wherein R is a natural number greater than 1;
an input end of the third 1×R power splitter is connected to the N th output port of the second N×N wavelength selective switch, one port at an output end of the third 1×R power splitter is connected to a remaining input end, other than an occupied end, of the second switch, one of remaining ports, other than an occupied port, at the output end of the third 1×R power splitter is connected to a remaining input end, other than an occupied end, of the third switch, and an output end of the third switch is connected to an input end of the third receiver; and the third receiver is configured to selectively receive, using the third switch, a backup service signal from the N th output port of the second N×N wavelength selective switch or a working ser

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhao Han
• Zong Liangjia
• Liu Ning

Classifications

• H04Q2011/0015

  using splitting combining · CPC title

• H04B10/032

  using working and protection systems {(H04J14/0287 takes precedence)} · CPC title

• H04Q11/0066

  Provisions for optical burst or packet networks · CPC title

• H04Q2011/0016

  using wavelength multiplexing or demultiplexing · CPC title

• H04J14/0221

  Power control, e.g. to keep the total optical power constant · CPC title