Method and Apparatus for Establishing Transmission Path for Exchanging Optical Signal

Patent metadata

Field	Value
Publication number	US-2018054664-A1
Application number	US-201715796312-A
Country	US
Kind code	A1
Filing date	Oct 27, 2017
Priority date	Apr 27, 2015
Publication date	Feb 22, 2018
Grant date	—

Abstract

A method and an apparatus for establishing a transmission path for exchanging an optical signal, where a gate device is disposed in front of an optical switch matrix, where the optical signal reaches the optical switch matrix through the gate device. A working state of the gate device and a working state of a first optical switch used for transmitting the optical signal in the optical switch matrix are adjusted in a time sequence such that when a transmission path used for transmitting the optical signal in the optical switch matrix is established, dynamic crosstalk can be reduced, and communication quality is improved.

First claim

What is claimed is:

1 . An apparatus for establishing a transmission path for exchanging an optical signal, wherein the apparatus is configured to establish, by changing a state of an optical switch in an optical switch matrix, the transmission path for exchanging the optical signal, and wherein the apparatus for establishing the transmission path comprises:
an external input port configured to input the optical signal; an external output port coupled to an internal output port of the optical switch matrix and configured to output an exchanged optical signal; a gate device, wherein an input port of the gate device is coupled to the external input port, wherein an output port of the gate device is coupled to an internal input port of the optical switch matrix, and wherein the gate device is configured to:
prohibit the optical signal to pass through the gate device when the gate device works in a close state; and
allow the optical signal to pass through the gate device when the gate device works in an open state; and
a controller, wherein an input port of the controller is coupled to the external input port and configured to obtain the transmission path of the optical signal in the optical switch matrix according to the external input port and the external output port, wherein the optical switch matrix further comprises a first optical switch, wherein the first optical switch is an optical switch on the transmission path, wherein the optical switch matrix is configured to:
exchange the optical signal; and
obtain the exchanged optical signal, and wherein the controller is further configured to:
generate a first control signal for the gate device, wherein the first control signal controls the gate device to work in the close state;
generate a second control signal for the first optical switch, wherein the second control signal controls the first optical switch to work in an expected state; and
generate a third control signal for the gate device, wherein the third control signal controls the gate device to work in the open state.

2 . The apparatus according to claim 1 , further comprising an optical splitter coupled to the controller and the gate device and configured to obtain a first optical signal and a second optical signal comprising preset powers from the optical signal by splitting, wherein the first optical signal is transmitted to the controller, wherein the second optical signal is transmitted to the gate device using an optical delay line, and wherein when obtaining the transmission path of the optical signal in the optical switch matrix, the controller is further configured to:
obtain the external input port according to a connection port between the controller and the external input port; read an optical identifier of the first optical signal; obtain the external output port according to the optical identifier; and obtain the transmission path of the optical signal in the optical switch matrix according to the external input port and the external output port.

3 . The apparatus according to claim 1 , wherein the gate device comprises an optical gate, and wherein the optical gate uses a semiconductor optical amplifier (SOA) and a second optical switch.

4 . The apparatus according to claim 1 , wherein the gate device comprises an optical gate, and wherein the optical gate uses a semiconductor optical amplifier (SOA).

5 . The apparatus according to claim 1 , wherein the gate device comprises an optical gate, and wherein the optical gate uses a second optical switch.

6 . The apparatus according to claim 3 , wherein a state switching speed of the second optical switch is higher than a state switching speed of the optical switch in the optical switch matrix.

7 . The apparatus according to claim 5 , wherein a state switching speed of the second optical switch is higher than a state switching speed of the optical switch in the optical switch matrix.

8 . The apparatus according to claim 3 , wherein the second optical switch and the optical switch matrix are disposed integrally.

9 . The apparatus according to claim 5 , wherein the second optical switch and the optical switch matrix are disposed integrally.

10 . The apparatus according to claim 1 , wherein the gate device comprises a power equalizer.

11 . A method for establishing a transmission path for exchanging an optical signal, by changing a state of an optical switch in an optical switch matrix, comprising:
obtaining, according to an external input port and an external output port of the optical signal, the transmission path of the optical signal in the optical switch matrix and a first optical switch used on the transmission path, wherein the optical signal reaches the optical switch matrix through a gate device, wherein the optical signal is prohibited to pass through the gate device when the gate device works in a close state, and wherein the optical signal is allowed to pass through the gate device when the gate device works in an open state, generating a first control signal for the gate device, wherein the first control signal controls the gate device to work in the close state; generating a second control signal for the first optical switch, wherein the second control signal controls the first optical switch to work in an expected state; and generating a third control signal for the gate device, wherein the third control signal controls the gate device to work in the open state.

12 . The method according to claim 11 , wherein before obtaining the transmission path of the optical signal and the first optical switch, the method further comprises obtaining a first optical signal and a second optical signal having preset powers from the optical signal by splitting, and wherein obtaining the transmission path of the optical signal and the first optical switch comprises:
determining the external input port according to a connection port between a controller and the external input port; reading an optical identifier of the first optical signal; determining the external output port according to the optical identifier; and obtaining the transmission path of the optical signal in the optical switch matrix according to the external input port and the external output port.

13 . The method according to claim 11 , wherein the gate device comprises an optical gate, and wherein the optical gate uses a semiconductor optical amplifier (SOA) and/or a second optical switch.

14 . The method according to claim 13 , wherein a state switching speed of the second optical switch is higher than a state switching speed of the optical switch in the optical switch matrix.

15 . The method according to claim 11 , wherein the gate device comprises a power equalizer.

16 . An apparatus for establishing a transmission path for exchanging an optical signal, by changing a state of an optical switch in an optical switch matrix, wherein the optical signal reaches the optical switch matrix through a gate device, wherein the optical signal is prohibited to pass through the gate device when the gate device works in a close state, wherein the optical signal is allowed to pass through the gate device when the gate device works in an open state, and wherein the apparatus comprises:
a memory configured to store an execution instruction; and a processor coupled to the memory, wherein the execution instruction causes the processor to be configured to:
obtain, according to an external input port and an external output port of the optical signal, the transmission path of the optical signal in the optical switch matrix and a first o

Assignees

• Huawei Tech Co Ltd

Inventors

• Yang Xiaoling

Classifications

• H04Q2011/0049

  Crosstalk reduction; Noise; Power budget · CPC title

• G02B6/35

  having switching means (by changing the optical properties of the medium G02F1/00) · CPC title

• H04Q2011/0013

  using gating amplifiers · CPC title

• H04Q2011/0058

  Crossbar; Matrix · CPC title

• H04Q11/0005 Primary

  Switch and router aspects · CPC title