WO2023061297A1

WO2023061297A1 - Wavelength division multiplexing device and optical signal processing method

Info

Publication number: WO2023061297A1
Application number: PCT/CN2022/124138
Authority: WO
Inventors: 李祥; 谭晶鑫; 顾江华
Original assignee: 华为技术有限公司
Priority date: 2021-10-11
Filing date: 2022-10-09
Publication date: 2023-04-20
Also published as: CN115967465A

Abstract

The present application discloses a wavelength division multiplexing device and an optical signal processing method, which are used to reduce configuration costs. In the embodiments of the present application, an upper wave loop and a lower wave loop of an OTU are configured. For example, the optical paths of an output end of a first wave-multiplexing unit and an input end of a second wave-multiplexing unit are used as an upper wave loop of a second OTU. The optical paths of an output end of a first wave-dividing unit and an input end of a second wave-dividing unit are used as a lower wave loop of the second OTU. The optical paths of an output end of the second wave-multiplexing unit and an input end of the first wave-multiplexing unit are used as an upper wave loop of a first OTU. The optical paths of an output end of the second wave-dividing unit and an input end of the first wave-dividing unit are used as a lower wave loop of the first OTU. Transmission is achieved by means of upper and lower wave loops when a fault occurs on upper and lower wave main paths of an OTU, thereby achieving optical layer protection when a fault occurs without configuring a local dimension of an optical layer. Moreover, only an upper wave loop and a lower wave loop need to be established, thus reducing configuration costs of the wavelength division multiplexing device.

Description

A wavelength division multiplexing device and optical signal processing method

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on October 11, 2021, with the application number 202111182587.9, and the application name is "A Wavelength Division Multiplexing Equipment and Optical Signal Processing Method", the entire content of which is passed References are incorporated in this application.

technical field

The embodiments of the present application relate to the technical field of optical communication, and in particular, to a wavelength division multiplexing device and an optical signal processing method.

Background technique

The Wavelength Division Multiplexing (WDM) system is used in the construction of backbone networks and metropolitan area network communication networks, and carries a large number of important communication services. When a network failure occurs, it is particularly important to restore communication services in a timely and rapid manner.

At present, the service protection modes adopted by the wavelength division multiplexing system are divided into electrical layer protection and optical layer protection. The electrical layer protection is mainly based on the optical data unit k (optical data unit k, ODUk) sub-network connection protection (SNCP) protection mode, which needs to increase the configuration of the optical transport unit (OTU) board ,higher cost. At present, the optical layer protection method generally adopts the rerouting protection method based on the optical wavelength rerouting wavelength division network (wavelength switched optical network, WSON). The rerouting protection method of WSON is generally configured in the reconfigurable optical add-drop multiplexer (reconfigurable optical add-drop multiplexer, ROADM) for the non-directional local dimension of the upper and lower optical layer configurations. The local dimension is generally implemented by using a wavelength selective switch or a dual-mode wavelength selective switch plus multiplexer/demultiplexer boards and optical amplifiers, resulting in high configuration costs.

Contents of the invention

Embodiments of the present application provide a wavelength division multiplexing device and an optical signal processing method, so as to reduce device configuration costs for optical layer protection.

In a first aspect, an embodiment of the present application provides a wavelength division multiplexing device. The wavelength division multiplexing device includes a first wave splitting unit, a first wave combining unit, a second wave splitting unit and a second wave combining unit. The input end of the first demultiplexing unit is optically connected to the output end of the first adjacent wavelength division multiplexing device and the second demultiplexing unit, and the output end of the first demultiplexing unit is respectively connected to the input end of the first multiplexing unit and the second demultiplexing unit. The input end of the two-wave division unit is optically connected. The output end of the first demultiplexing unit is also directly optically connected to at least one first optical transmission unit OTU. The input end of the first multiplexing unit is also optically connected to the output end of the second multiplexing unit, and the input end of the first multiplexing unit is also directly optically connected to at least one second OTU. The output end of the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device and the input end of the second multiplexing unit. The input end of the second demultiplexing unit is also optically connected to the second adjacent wavelength division multiplexing device, the output end of the second demultiplexing unit is also optically connected to the input end of the second demultiplexing unit, and the output end of the second demultiplexing unit Also directly optically connected to at least one second OTU. The input end of the second multiplexing unit is also directly optically connected to at least one first OTU. The output end of the second multiplexing unit is also optically connected to the first adjacent wavelength division multiplexing device.

Wherein, the first demultiplexing unit is used to separate the second optical signal and the third optical signal from the received first optical signal, and then send the second optical signal to the first OTU. When the wavelength division multiplexing equipment and the second adjacent wavelength division multiplexing equipment are connected normally, the first wavelength division unit sends the third optical signal to the first multiplexing unit; when the wavelength division multiplexing equipment and the second adjacent wavelength division multiplexing equipment When there is a connection failure with the device, the first demultiplexing unit sends the third optical signal to the second demultiplexing unit. The first multiplexing unit is used to send the received fourth optical signal to the second adjacent wavelength division multiplexing device when the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device is normal. When the connection between the device and the second adjacent wavelength division multiplexing device fails, the fourth optical signal is sent to the second multiplexing unit; the fourth optical signal includes at least an optical signal from at least one second OTU. The second demultiplexing unit is configured to separate the sixth optical signal and the seventh optical signal from the received fifth optical signal, and send the second sixth optical signal to the second OTU. When the wavelength division multiplexing equipment and the first adjacent wavelength division multiplexing equipment are connected normally, the second wavelength division unit sends the seventh optical signal to the second wavelength division multiplexing unit, and when the wavelength division multiplexing equipment and the first adjacent wavelength division multiplexing equipment When there is a connection failure with the device, the second demultiplexing unit sends the seventh optical signal to the first demultiplexing unit. The second multiplexing unit is used to send the received eighth optical signal to the second adjacent wavelength division multiplexing device when the wavelength division multiplexing device is normally connected to the first adjacent wavelength division multiplexing device. When the device fails to connect to the first adjacent wavelength division multiplexing device, the eighth optical signal is sent to the first multiplexing unit; the eighth optical signal includes at least an optical signal from at least one first OTU.

Through the solution provided by the embodiment of the present application, the first demultiplexing unit and the second demultiplexing unit have an optical connection, and the first demultiplexing unit and the second demultiplexing unit also have an optical connection to form the upper part of the first OTU and the second OTU. wave circuit and wave circuit. The optical path between the output end of the first multiplexing unit and the input end of the second multiplexing unit can be understood as an add-wave loop of the second OTU. The optical path between the output end of the first demultiplexing unit and the input end of the second demultiplexing unit can be understood as a drop-wave loop of the second OTU. The optical path between the output end of the second multiplexing unit and the input end of the first multiplexing unit can be understood as an adding loop of the first OTU. The optical path between the output end of the second demultiplexing unit and the input end of the first demultiplexing unit can be understood as a drop-wave loop of the first OTU. In this way, when a fault occurs on the main path of adding and dropping waves of the OTU, it is transmitted through the wave adding and adding loops. It is not necessary to configure the local dimension of the optical layer to realize the optical layer protection in case of failure. It only needs to establish the upwave loop and the downwave loop, and does not need to add additional devices such as WSS in the local dimension, which can reduce resources and reduce the cost of wavelength division multiplexing equipment. configuration cost.

In a possible design, the first demultiplexing unit includes N+2 output ports including the first input port, the second input port, the first output port and the second output port, and the second demultiplexing unit includes the first N+2 output ports including the three input ports, the fourth input port, the third output port and the fourth output port, the first multiplexing unit includes the fifth output port, the sixth output port, the fifth input port and the fourth output port N+2 input ports including six input ports, the second multiplexer unit includes N+2 input ports including the seventh output port, the eighth output port, the seventh input port and the eighth input port, N is A positive integer; wherein, the first input port is optically connected to the first adjacent wavelength division multiplexing device, the second input port is optically connected to the third output port of the second demultiplexing unit, and the first output port is optically connected to the fifth input port ; The second output port is optically connected to the third input port; the N1 output ports other than the first output port and the second output port in the first demultiplexing unit are directly optically connected to the N1 first OTUs in one-to-one correspondence, and N1 is less than Or equal to N; the sixth input port is optically connected to the seventh output port, and the N2 input ports other than the fifth input port and the sixth input port in the first multiplexing unit are directly optically connected to N2 second OTUs in one-to-one correspondence , the fifth output port is optically connected to the second adjacent wavelength division multiplexing device, the sixth output port is optically connected to the seventh input port; the fourth input port is optically connected to the second adjacent wavelength division multiplexing device, and the fourth output port is optically connected to the second adjacent wavelength division multiplexing device The eighth input port is optically connected; the N2 output ports other than the third output port and the fourth output port in the second demultiplexing unit are directly optically connected to the N2 second OTUs in one-to-one correspondence, and N2 is less than or equal to N; the eighth The output port is optically connected to the first adjacent wavelength division multiplexing device, and the input ports of N1 other than the seventh input port and the eighth input port in the second multiplexing unit are directly optically connected to the N1 first OTUs in one-to-one correspondence. The up/down wave circuit is realized through the configuration connection between ports, and the up/down wave transmission of multiple OTUs is supported, which improves the utilization rate of the wavelength division multiplexing equipment and further reduces the configuration cost of the wavelength division multiplexing equipment.

In a possible design, the first demultiplexing unit includes a first coupler and a first wavelength selective switch WSS, the second demultiplexing unit includes a second coupler and a second WSS, and the first demultiplexing unit includes a first demultiplexing unit device and the third WSS, the second multiplexer unit includes a second optical splitter and a fourth WSS; the input ends of the first coupler are optically connected to the output ends of the first adjacent wavelength division multiplexing device and the second WSS respectively, and the first The output end of the coupler is optically connected to the input end of the first WSS, the output end of the first WSS is optically connected to the input end of the third WSS and the input end of the second coupler, and the output end of the first WSS is also connected to at least one The first OTU is directly optically connected; the input end of the third WSS is also optically connected to the output end of the second optical splitter, the input end of the third WSS is also directly optically connected to at least one second OTU, and the output end of the third WSS is optically connected to the second OTU. The input end of an optical splitter is optically connected, the output end of the first optical splitter is respectively connected with the second adjacent wavelength division multiplexing equipment and the fourth WSS optical connection; the input end of the second coupler is also connected with the second adjacent wavelength division multiplexing equipment optical connection, the output end of the second coupler is optically connected to the input end of the second WSS, the output end of the second WSS is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to at least one second OTU The input end of the fourth WSS is also directly optically connected to at least one first OTU, the output end of the fourth WSS is optically connected to the input end of the second optical splitter, and the output end of the second optical splitter is also connected to the first adjacent wavelength division multiplexer Connect with device light. Through the above design, combine the coupler and WSS to realize the function of the wavelength division unit, and combine the WSS and the optical splitter to realize the function of the multiplexing unit. Due to the low cost of the added coupler and optical splitter, the wavelength division multiplexing can be further reduced The configuration cost of the equipment.

In a possible design, the first WSS and the fourth WSS are deployed on the same board; the second WSS and the third WSS are deployed on the same board.

In a possible design, the first demultiplexing unit also includes a first optical amplifier, and the first optical amplifier is arranged between the first coupler and the first wavelength selective switch WSS; the second demultiplexing unit also includes a second optical amplifier , the second optical amplifier is arranged between the first coupler and the second WSS; the first multiplexer unit also includes a third optical amplifier, and the third optical amplifier is arranged between the first optical splitter and the third WSS; the second combiner The wave unit also includes a fourth optical amplifier, and the fourth optical amplifier is arranged between the second optical splitter and the fourth WSS. The above design uses an optical amplifier to increase the transmission power of the optical signal.

In a possible design, the first wave splitting unit and the second wave splitting unit are respectively WSS; the first wave combining unit and the second wave combining unit are respectively WSS. In the above design, only the WSS is used to implement the functions of the demultiplexing unit and the multiplexing unit, and no additional local optical layer configuration is required to reduce the configuration cost of the wavelength division multiplexing equipment.

In a possible design, the WSSs respectively included in the first wave splitting unit and the second wave combining unit are deployed on the same board, and the WSSs respectively included in the second wave splitting unit and the first wave combining unit are deployed on the same board. veneer.

In a possible design, the first wave splitting unit and the second wave combining unit are deployed on the same single board, and the second wave splitting unit and the first wave combining unit are deployed on the same single board.

In a possible design, the first demultiplexing unit includes a first optical switch and a first WSS, the second demultiplexing unit includes a second optical switch and a second WSS, and the first multiplexing unit includes a third optical switch and a second WSS. Three WSSs, the second multiplexing unit includes a fourth optical switch and a fourth WSS; wherein, the input end of the first optical switch is respectively connected to the output end of the first adjacent wavelength division multiplexing device and the second WSS, and the first optical The output end of the switch is optically connected to the input end of the first WSS, the output end of the first WSS is optically connected to the input end of the third WSS and the input end of the second optical switch, and the output end of the first WSS is also connected to at least one first WSS An OTU is directly optically connected; the input end of the third WSS is also optically connected to the output end of the fourth optical switch, the input end of the third WSS is also directly optically connected to at least one second OTU, and the output end of the third WSS is optically connected to the third The input end of the optical switch is optically connected, and the output end of the first optical splitter is optically connected with the second adjacent wavelength division multiplexing device and the fourth WSS respectively; the input end of the second optical switch is also optically connected with the second adjacent wavelength division multiplexing device. Connecting, the output end of the second optical switch is optically connected to the input end of the second WSS, the output end of the second WSS is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to at least one second OTU; The input end of the fourth WSS is also directly optically connected to at least one first OTU, the output end of the fourth WSS is optically connected to the input end of the fourth optical switch, and the output end of the fourth optical switch is also connected to the first adjacent wavelength division multiplexed Device optical connection. Through the above design, the optical switch and the WSS are combined to realize the functions of the wavelength division unit and the wavelength division unit. Since the cost of the added optical switch is lower, the configuration cost of the wavelength division multiplexing equipment is further reduced.

In a possible design, the first demultiplexing unit further includes a first optical amplifier, and the first optical amplifier is arranged between the first optical switch and the first wavelength selective switch WSS; the second demultiplexing unit further includes a second optical amplifier Amplifier, the second optical amplifier is arranged between the second optical switch and the second WSS; the first multiplexing unit also includes a third optical amplifier, the third optical amplifier is arranged between the third optical switch and the third WSS; the second The multiplexing unit further includes a fourth optical amplifier, and the fourth optical amplifier is arranged between the fourth optical switch and the fourth WSS.

In a possible design, the wavelength division multiplexing device further includes a first optical amplifier, a second optical amplifier, a third optical amplifier, and a fourth optical amplifier; the first optical amplifier is deployed at the input end of the first demultiplexing unit, The first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the first optical amplifier; the second optical amplifier is deployed at the input end of the second demultiplexing unit, and the second demultiplexing unit is connected to the second demultiplexing unit through the second optical amplifier. The adjacent wavelength division multiplexing equipment is optically connected; the third optical amplifier is deployed at the output end of the first multiplexing unit, and the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing equipment through the third optical amplifier; the fourth optical amplifier It is deployed at the output end of the second multiplexing unit, and the second multiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the fourth optical amplifier.

In a possible design, the first optical amplifier, the first demultiplexing unit, the second multiplexing unit, and the fourth optical amplifier are deployed on the same single board. The second optical amplifier, the second demultiplexing unit, the first multiplexing unit, and the third optical amplifier are deployed on the same single board.

In a possible design, the wavelength division multiplexing device further includes a controller, configured to control the first wavelength division unit to transmit the third optical signal when the wavelength division multiplexing device fails to connect to the second adjacent wavelength division multiplexing device The light is crossed to the second wave division unit; and the first wave multiplex unit is controlled to cross the light of the fourth optical signal to the second wave multiplex unit. Optionally, the controller is also used to control the first demultiplexing unit to cross the third optical signal to the first multiplexing unit when the wavelength division multiplexing device is normally connected to the second adjacent wavelength division multiplexing device; and The first multiplexing unit is controlled to cross the fourth optical signal to the second adjacent wavelength division multiplexing device.

In a possible design, the wavelength division multiplexing device further includes a controller, configured to control the second wavelength division unit to transmit the seventh optical signal The light is crossed to the first wave splitting unit; and the second wave combining unit is controlled to cross the light of the eighth optical signal to the first wave combining unit. Optionally, the controller is also configured to control the second demultiplexing unit to cross the seventh optical signal to the second multiplexing unit when the wavelength division multiplexing device is normally connected to the first adjacent wavelength division multiplexing device; And controlling the second multiplexing unit to cross the eighth optical signal to the first adjacent wavelength division multiplexing device.

In a second aspect, the embodiment of the present application provides an optical signal processing method. The wavelength division multiplexing device includes a first wave splitting unit, a first wave combining unit, a second wave splitting unit and a second wave combining unit. The method includes receiving a first optical signal from a first adjacent wavelength division multiplexing device. The second optical signal to be sent to at least one OTU is separated from the first optical signal by the first demultiplexing unit, and the second optical signal is directly distributed to at least one first OTU. When the wavelength division multiplexing device is normally connected to the second adjacent wavelength division multiplexing device, the first demultiplexing unit is controlled to send the third optical signal except the second optical signal in the first optical signal to the first multiplexing unit, And the third optical signal is sent to the second adjacent wavelength division multiplexing device through the first multiplexing unit. When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, the first demultiplexing unit is controlled to send the third optical signal except the second optical signal in the first optical signal to the second demultiplexing unit. The second demultiplexing unit is controlled to separate the fourth optical signal to be sent to at least one second OTU from the third optical signal, and the fourth optical signal is sent to at least one second OTU through the second demultiplexing unit. controlling the second demultiplexing unit to send the fifth optical signal except the fourth optical signal in the third optical signal to the second demultiplexing unit, and sending the fifth optical signal to the first adjacent demultiplexing unit through the second demultiplexing unit Reuse equipment.

In a possible design, the method further includes: receiving an optical signal from at least one second OTU; when the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fail to connect, controlling the first multiplexing unit to send the optical signal from The optical signal of at least one second OTU is sent to the second multiplexing unit. Sending the fifth optical signal to the first adjacent wavelength division multiplexing device through the second multiplexing unit includes: after multiplexing the fifth optical signal and the optical signal from at least one second OTU through the second multiplexing unit, Send to the first adjacent wavelength division multiplexing device.

In a possible design, the method further includes: receiving an optical signal from at least one first OTU. The fifth optical signal and the optical signal from at least one second OTU are combined and processed by the second multiplexing unit, and then sent to the first adjacent wavelength division multiplexing device, which specifically includes: the fifth optical signal is combined by the second multiplexing unit After the signal, the optical signal from at least one first OTU and the optical signal from at least one second OTU are combined and processed, they are sent to the first adjacent wavelength division multiplexing device.

In a possible design, controlling the first demultiplexing unit to send the third optical signal in the first optical signal except the second optical signal to the second demultiplexing unit specifically includes: controlling the first demultiplexing unit to perform optical Cross-switching, the third optical signal except the second optical signal in the first optical signal is optically crossed to the output port connected to the second demultiplexing unit.

For the structures of the first wave splitting unit, the second wave splitting unit, the first wave combining unit and the second wave combining unit, reference may be made to the relevant description of the first aspect, and details will not be repeated here.

In a third aspect, the embodiment of the present application further provides an optical signal processing method. The method can be applied to a controller in a wavelength division multiplexing device. The wavelength division multiplexing device includes a first wave splitting unit, a first wave combining unit, a second wave splitting unit and a second wave combining unit. The method includes: controlling the first demultiplexing unit to separate the second optical signal to be sent to at least one OTU from the received first optical signal, and directly distribute the second optical signal to at least one first OTU. When the wavelength division multiplexing device is normally connected to the second adjacent wavelength division multiplexing device, the first demultiplexing unit is controlled to send the third optical signal except the second optical signal in the first optical signal to the first multiplexing unit, And control the first multiplexing unit to send the third optical signal to the second adjacent wavelength division multiplexing device. When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, the first demultiplexing unit is controlled to send the third optical signal except the second optical signal in the first optical signal to the second demultiplexing unit. The second demultiplexing unit is controlled to separate the fourth optical signal to be sent to at least one second OTU from the third optical signal, and the second demultiplexing unit is controlled to send the fourth optical signal to at least one second OTU. Controlling the second demultiplexing unit to send the fifth optical signal except the fourth optical signal in the third optical signal to the second multiplexing unit, and controlling the second multiplexing unit to send the fifth optical signal to the first adjacent wavelength division Reuse equipment.

In a possible design, the method further includes: when the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, controlling the first multiplexing unit to send the optical signal from at least one second OTU to the first Two multiplexer units. Controlling the second multiplexing unit to send the fifth optical signal to the first adjacent wavelength division multiplexing device includes: controlling the second multiplexing unit to multiplex the fifth optical signal and the optical signal from at least one second OTU, Send to the first adjacent wavelength division multiplexing device.

In a possible design, the method further includes: controlling the second multiplexing unit to multiplex and process the fifth optical signal and the optical signal from at least one second OTU, and then send the fifth optical signal to the first adjacent wavelength division multiplexing device, specifically The method includes: controlling the second multiplexing unit to multiplex the fifth optical signal, the optical signal from at least one first OTU, and the optical signal from at least one second OTU, and then send the fifth optical signal to the first adjacent wavelength division multiplexing device.

In a fourth aspect, the embodiment of the present application provides a computer-readable storage medium. The storage medium stores a software program, and when the software program is read and executed by one or more processors, the method provided by any design of the third aspect can be realized.

In a fifth aspect, the embodiments of the present application provide a computer program product including instructions. When it runs on a computer, the computer is made to execute the method provided by any design of the third aspect above.

For the beneficial effects of the above-mentioned second aspect to the fifth aspect, reference may be made to the relevant description of the first aspect, which will not be repeated here.

Description of drawings

FIG. 1 is a schematic diagram of an architecture of a non-directional ROADM;

Fig. 2 is a structural representation of a ring-shaped metropolitan area network;

FIG. 3A is a schematic structural diagram of a wavelength division multiplexing device in an embodiment of the present application;

FIG. 3B is a schematic structural diagram of another wavelength division multiplexing device in the embodiment of the present application;

FIG. 4 is a schematic diagram of deployment of wavelength division multiplexing equipment in an embodiment of the present application;

Fig. 5 is a schematic diagram of the signal processing mode of the wavelength division multiplexing equipment when the A-direction link and the B-direction link are normal in the embodiment of the present application;

FIG. 6 is a schematic diagram of a signal processing method of a wavelength division multiplexing device when a failure occurs in the B-direction link in the embodiment of the present application;

FIG. 7 is a schematic diagram of the signal processing method of the wavelength division multiplexing device when the A-direction link fails in the embodiment of the present application;

FIG. 8 is a schematic structural diagram of another wavelength division multiplexing device in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 1 of the present application;

FIG. 10 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 1 of the present application;

FIG. 11 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 1 of the present application;

FIG. 12 is a schematic diagram of the connection relationship of each port in the wavelength division multiplexing device provided in Example 1 of the present application;

FIG. 13 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 2 of the present application;

FIG. 14 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 2 of the present application;

FIG. 15 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 3 of the present application;

FIG. 16 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 3 of the present application;

FIG. 17 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 3 of the present application;

FIG. 18 is a schematic diagram of the connection relationship of each port in the wavelength division multiplexing device provided in Example 3 of the present application;

FIG. 19 is a schematic flowchart of an optical signal processing method in an embodiment of the present application.

Detailed ways

The application will be described in further detail below in conjunction with the accompanying drawings.

The wavelength division multiplexing system can adopt the service protection mode of the optical layer. The optical layer protection method can adopt the rerouting protection method of WSON. The rerouting protection method of WSON can adopt the way of deploying non-directional ROADM. FIG. 1 is a schematic diagram of a non-directional ROADM architecture. As shown in Figure 1, the non-directional ROADM includes two 1*N WSS boards, namely WSS board 1 and WSS board 2, which are used to implement wavelength scheduling between different dimensions. In the local dimension of the optical layer connecting the optical transport unit (OTU) single board, at least one 1*N WSS single board 3 and upper and lower demultiplexing units are required, such as an add/drop multiplexer (ADD/Drop multiplexer) , ADM). In subsequent descriptions, the OTU board is referred to as OTU for short. The add/drop multiplexer can be a non-wavelength (Colorless) up/down demultiplexing unit based on WSS, or a wavelength-based (Colored) up/down demultiplexing unit based on arrayed waveguide grating (AWG). The ROADM site mainly uses the WSS board and the up/down demultiplexing unit in the local dimension of the optical layer to perform local up/down demultiplexing according to the wavelength, and realize line direction scheduling. 1*N WSS single boards 3 in the local dimension of the optical layer are used to connect WSS single boards of different direction dimensions. A WSS board can consist of two 1*N WSS modules, or one 1*N WSS module and one 1*N splitter.

The signal flow direction will be described below by taking the upper and lower demultiplexing of wavelength λ1 in direction 1 in Fig. 1 as an example. In the downwave direction, the optical signal of wavelength λ1 enters the optical receiving module of WSS board 1 (such as 1*N WSS module or Splitter module) from the optical cable in direction 1. The wave port (such as the DM port) is sent to the multiplex port (such as the AM port) of the optical receiving module (WSS module) of the local dimension WSS board 3 of the optical layer, and then to the downwave demultiplexing unit, and then to the receiving end of the OTU2. In the upwave direction, the optical signal of wavelength λ1 sent by OTU 2 is combined by the upwave multiplexing unit (WSS single board or AWG single board) in the local dimension of the optical layer, and enters the uplink of WSS single board 3 in the local dimension of the optical layer. The wavelength unit (such as a WSS module or Splitter module), and then from the demultiplexing port (DM port) of the WSS board 3 in the local dimension of the optical layer to the wavelength selection unit (WSS module) of the WSS board 1 in the direction 1 dimension, through the WSS module After the wavelength is crossed, it is input to the directional 1D optical cable.

The Directionless ROADM site needs to configure the upper and lower wavelength layer configurations of the local dimension. The local dimension of the optical layer is implemented by using WSS boards, upper and lower demultiplexing boards, etc., resulting in high configuration costs.

Embodiments of the present application provide a wavelength division multiplexing device and an optical signal processing method, which are used to reduce configuration costs of a wavelength division multiplexing system. The wavelength division multiplexing device and optical signal processing method provided in the embodiments of the present application can be applied to a wavelength division multiplexing system. The WDM system can be applied to networks such as backbone networks and metropolitan area networks.

As an example, take a wavelength division multiplexing device applied to a metropolitan area network as an example. Take the ring MAN as an example. The ring structure adopted by the ring metropolitan area network can be called a convergence ring. Referring to FIG. 2, the convergence ring includes at least one convergence node and multiple integrated service access (central office, CO) nodes. The convergence ring adopts bidirectional deployment. In FIG. 2 , it is taken as an example that there are two sink nodes, which are sink node A and sink node B respectively. CO nodes include 4 examples, namely CO1, CO2, CO3 and CO4. The two aggregation nodes and the four CO nodes are connected by optical fibers. The two aggregation nodes are used to undertake the business data of the CO, and the two aggregation nodes can also play a role of load sharing. When any CO node on the aggregation ring fails, other CO nodes need to adjust the transmission direction of the optical signal to quickly restore the wavelength connection between the CO node and the two aggregation nodes, so as to avoid transmission interruption or congestion of service data. In order to quickly restore the wavelength connection between the CO node and the two sink nodes, the optical layer WSON can be used.

In some embodiments, the CO node may adopt the ROADM structure shown in FIG. 1 . However, the structure of the non-directional ROADM needs to configure the local dimension of the optical layer, resulting in high configuration costs. The present application provides another wavelength division multiplexing device that can be applied to CO nodes, which does not require configuration of the local dimension of the optical layer, and can save the cost of optical layer configuration.

FIG. 3A is a schematic structural diagram of a wavelength division multiplexing device in an embodiment of the present application. As shown in FIG. 3A , the wavelength division multiplexing device includes a first demultiplexing unit 310 , a first multiplexing unit 320 , a second demultiplexing unit 330 and a second multiplexing unit 340 . The first demultiplexing unit 310 is optically connected to the first demultiplexing unit 320 and the second demultiplexing unit 330 . The first multiplexing unit 320 also has an optical connection with the second multiplexing unit 340 . The second demultiplexing unit 330 is also optically connected to the second multiplexing unit 340 . The input end of the first demultiplexing unit 310 is optically connected to the output end of the second demultiplexing unit 330, and the output end of the first demultiplexing unit 310 is respectively connected to the input end of the first demultiplexing unit 320 and the second demultiplexing unit 330. Input optical connection. The input terminal of the first multiplexing unit 320 is also optically connected to the output terminal of the second multiplexing unit 340 , and the output terminal of the first multiplexing unit 320 is optically connected to the input terminal of the second multiplexing unit 340 . The output end of the second demultiplexing unit 330 is also optically connected to the input end of the second demultiplexing unit 340 . The output end of the second multiplexing unit 340 is also optically connected to the first adjacent wavelength division multiplexing device. In the embodiment of the present application, the demultiplexing unit may also be called a downwave unit, and is used to distribute downwave signals, and the multiplexer unit may also be called an upwave unit, and is used to perform combination of upwave signals. The first demultiplexing unit 310 and the second multiplexing unit 340 are used in combination to perform up-down multiplexing and demultiplexing of the connected OTUs. The first multiplexing unit 320 and the second demultiplexing unit 330 are used in combination to perform up-down multiplexing and demultiplexing of the connected OTUs. For ease of distinction, the OTU optically connected to the first demultiplexing unit 310 and the second demultiplexing unit 340 is referred to as the first OTU. The OTU optically connected to the first multiplexing unit 320 and the second demultiplexing unit 330 is called a second OTU.

In some embodiments, the first multiplexing unit 310 and the second multiplexing unit 340 may be deployed on the same single board. The first multiplexing unit 320 and the second multiplexing unit 340 may be deployed on the same single board. When the demultiplexing unit and the multiplexing unit are deployed on the same board, the board may be called a multiplexer/demultiplexer, or a multiplexer/demultiplexer board, or other names, which are not specifically limited in this embodiment of the present application. FIG. 3B is a schematic structural diagram of another wavelength division multiplexing device in an embodiment of the present application. In FIG. 3B, the single board deployed by the first multiplexing unit 310 and the second multiplexing unit 340 is called single board 1, and the single board deployed by the first multiplexing unit 320 and the second multiplexing unit 340 is called single board. 2.

In some embodiments, the first multiplexing unit 310, the second multiplexing unit 340, the first multiplexing unit 320, and the second multiplexing unit 340 may also be deployed separately. The demultiplexing unit may also be called a demultiplexer or a demultiplexing board, or other names, which are not specifically limited in this embodiment of the present application.

FIG. 4 is a schematic diagram of deployment of wavelength division multiplexing equipment in an embodiment of the present application. As shown in FIG. 4 , the output end of the first demultiplexing unit 310 is also directly optically connected to at least one first OTU. The input end of the second multiplexing unit 340 is also directly optically connected to at least one first OTU. The input end of the first multiplexing unit 320 is also directly optically connected to at least one second OTU. The output end of the second demultiplexing unit 330 is also directly optically connected to at least one second OTU. The number of first OTUs supported by the wavelength division multiplexing device is related to the number of ports included in the output end of the first demultiplexing unit 310 and the number of ports included in the input end of the second multiplexing unit 340 . Exemplarily, the number of first OTUs connected to the wavelength division multiplexing device is less than or equal to the minimum value of the number of ports included in the output of the first demultiplexing unit 310 and the number of ports included in the input of the second multiplexing unit 340 . The number of second OTUs supported by the wavelength division multiplexing device is related to the number of ports included in the output end of the second wavelength division unit 330 and the number of ports included in the input end of the first multiplexer unit 320 . Exemplarily, the number of second OTUs connected to the wavelength division multiplexing device is less than or equal to the minimum value of the number of ports included in the output of the second demultiplexing unit 330 and the number of ports included in the input of the first multiplexing unit 320 .

In some embodiments, the wavelength division multiplexing device has at least two adjacent wavelength division multiplexing devices, and is connected to the two adjacent wavelength division multiplexing devices through an optical fiber. For ease of description, two adjacent wavelength division multiplexing devices are referred to as a first adjacent wavelength division multiplexing device and a second adjacent wavelength division multiplexing device, as shown in FIG. 4 . The input end of the first demultiplexing unit 310 is also optically connected to the first adjacent wavelength division multiplexing device, and the output end of the first multiplexing unit 320 is also optically connected to the second adjacent wavelength division multiplexing device. The input end of the second demultiplexing unit 330 is also optically connected to the second adjacent wavelength division multiplexing device, and the output end of the second demultiplexing unit 330 is also optically connected to the first adjacent wavelength division multiplexing device.

In a possible implementation manner, the wavelength division multiplexing device may further include a controller 350, and the controller 350 is used to control the first wavelength division unit 310, the second wavelength division unit 330, the first The multiplexing unit 320 and the second multiplexing unit 340 perform control, and the specific control method will be described in detail later, and will not be repeated here.

For the convenience of description, the direction connecting the wavelength division multiplexing device with the first adjacent wavelength division multiplexing device will be referred to as direction A, and the link between the wavelength division multiplexing device and the first adjacent wavelength division multiplexing device will be referred to as It is the A-direction link. In the following, the direction connecting the WDM equipment with the second adjacent WDM equipment is called B-direction, and the link between the WDM equipment and the second adjacent WDM equipment is referred to as the B-direction link. road.

FIG. 5 is a schematic diagram of a signal processing method of a wavelength division multiplexing device when the A-direction link and the B-direction link are normal in the embodiment of the present application. A signal processing manner in which both the A-direction link and the B-direction link are normal will be described below with reference to FIG. 5 .

When both the A-direction link and the B-direction link are normal, the signal flow in the wavelength division multiplexing device is indicated by the solid line in FIG. 5 . Taking the optical signal sent by the first adjacent wavelength division multiplexing device to the wavelength division multiplexing device as an example, the first optical signal is separated by the first demultiplexing unit 310 from the received first optical signal to be sent to at least one first optical signal. A second optical signal and a third optical signal of an OTU.

It should be noted that the first demultiplexing unit 310 may separate the second optical signal to be sent to the first OTU from the first optical signal according to the wavelength of each first OTU, and perform a sending operation. The third optical signal may be understood as an optical signal except the second optical signal of at least one first OTU from the first optical signal. For example, the first optical signal includes optical signals to be sent to the three first OTUs, then the optical signals in the first optical signal except the optical signals of the three first OTUs are the third optical signals. The first demultiplexing unit 310 sends the third optical signal to the first multiplexing unit 320 , and sends the third optical signal to the second adjacent wavelength division multiplexing device through the first multiplexing unit 320 . In some embodiments, optical signals that need to be sent exist on one or more second OTUs, and for ease of distinction, the optical signals that need to be sent by one or more second OTUs are collectively referred to as fourth optical signals. One or more second OTUs respectively send the fourth optical signal to be sent to the first multiplexing unit 320, and the first multiplexing unit 320 can combine the fourth optical signal and the third optical signal and send it to the second adjacent wave Multiplexing equipment.

The second demultiplexing unit 330 separates a sixth optical signal and a seventh optical signal to be sent to at least one second OTU from the received fifth optical signal. When both the A-direction link and the B-direction link are normal, the fifth optical signal is an optical signal received from the second adjacent wavelength division multiplexing device.

It should be noted that the second demultiplexing unit 330 may separate the sixth optical signal to be sent to the second OTU from the fifth optical signal according to the wavelength of each second OTU, and perform a sending operation. The seventh optical signal may be understood as an optical signal in the fifth optical signal except the sixth optical signal of at least one second OTU. For example, the fifth optical signal includes optical signals to be sent to two second OTUs, then the optical signals in the fifth optical signal except the optical signals of the two second OTUs are the seventh optical signals. The second demultiplexing unit 330 sends the seventh optical signal to the second multiplexing unit 340 , and sends the seventh optical signal to the first adjacent wavelength division multiplexing device through the second multiplexing unit 340 .

In some embodiments, there are optical signals that need to be sent on one or more first OTUs, and for ease of distinction, the optical signals of one or more second OTUs are collectively referred to as an eighth optical signal. One or more first OTUs respectively send the eighth optical signal to be sent to the second multiplexing unit 340, and the second multiplexing unit 340 can combine the eighth optical signal and the seventh optical signal and send it to the first adjacent wave Multiplexing equipment.

In some embodiments, the controller may control the first demultiplexing unit 310 to cross the third optical signal to the first multiplexing unit 320 when both the A-direction link and the B-direction link are normal. And control the first multiplexing unit 320 to cross the fourth optical signal light to the second adjacent wavelength division multiplexing device. The second demultiplexing unit 330 is controlled to cross the seventh optical signal light to the second multiplexing unit 340, and the second multiplexing unit 340 is controlled to cross the eighth optical signal light to the first adjacent wavelength division multiplexing device.

FIG. 6 is a schematic diagram of a signal processing method of a wavelength division multiplexing device when a failure occurs on the B-direction link in the embodiment of the present application. The following describes the signal processing manner when the B-direction link fails with reference to FIG. 6 .

When the B-direction link fails, the optical signal that needs to be sent to the second adjacent wavelength division multiplexing device is sent to the first adjacent wavelength division multiplexing device through the second wavelength division unit 330 and the second multiplexer unit 340 . When the ring network is adopted, the optical signal forwarded from the B direction is switched to the A direction to be forwarded to the corresponding OTU or the network side.

After the first demultiplexing unit 310 separates the third optical signal from the received first optical signal, the third optical signal is sent to the second demultiplexing unit 330 . In some embodiments, when the B-direction link fails, the controller controls the first demultiplexing unit 310 to cross the third optical signal light to the second demultiplexing unit 330, and controls the first demultiplexing unit 320 to cross the fourth optical signal to the second demultiplexing unit 330. The optical signal light crosses to the second multiplexing unit 340 . The second demultiplexing unit 330 may perform a demultiplexing operation to separate the optical signal required by the second OTU from the third optical signal. In the embodiment of the present application, when the second demultiplexing unit 330 performs the demultiplexing operation, it may perform the demultiplexing operation according to the wavelength of the second OTU. It should be noted that when the link in direction B fails, the second demultiplexing unit 330 will no longer receive optical signals directly from the second adjacent wavelength division multiplexing device. When the link in direction B fails, the second demultiplexing unit 330 will only receive optical signals from the first demultiplexing unit 310 . For example, the optical signal to be sent to the second OTU separated from the third optical signal is called optical signal 9 . Then the optical signal 9 is sent to the second OTU. The optical signals other than the optical signal 9 among the third optical signals are referred to as optical signals 10 . Send the optical signal 10 to the second multiplexing unit 340 . When there is no optical signal to be sent on the first OTU, the second multiplexing unit 340 may send the optical signal 10 to the first adjacent wavelength division multiplexing device. When there is an optical signal to be sent on the first OTU, the second multiplexing unit 340 directly receives the optical signal to be sent by the first OTU from the first OTU. For ease of distinction, the optical signal that needs to be sent by the first OTU is called the eighth optical signal. Of course, the first OTU may include multiple, and the first OTU that needs to send optical signals may be different at different times. The number of first OTUs that need to send optical signals may also be different at different times. After receiving the eighth optical signal, the second multiplexing unit 340 may combine the optical signal 10 and the eighth optical signal and send them to the first adjacent wavelength division multiplexing device.

In some embodiments, when the B-direction link fails, the first multiplexing unit 320 will not receive the optical signal from the first demultiplexing unit 310 . If there is an optical signal to be sent on the second OTU, the first multiplexing unit 320 may directly receive the optical signal to be sent on the second OTU from the second OTU. For ease of description, the optical signal to be sent on the second OTU is also referred to as the fourth optical signal herein. The first multiplexing unit 320 sends the fourth optical signal to the second multiplexing unit 340 . Therefore, the second multiplexing unit 340 can multiplex the fourth optical signal, the eighth optical signal, and the optical signal 10 and send them to the first adjacent wavelength division multiplexing device.

FIG. 7 is a schematic diagram of a signal processing method of a wavelength division multiplexing device when a failure occurs on the A-direction link in the embodiment of the present application. The signal processing manner when the link in direction A fails will be described below with reference to FIG. 7 .

When the A-direction link fails, the optical signal that needs to be sent to the first adjacent wavelength division multiplexing device is sent to the second adjacent wavelength division multiplexing device through the first wavelength division unit 310 and the first multiplexing unit 320 . When a ring network is used, the optical signal forwarded from direction A is switched to direction B to be forwarded to the corresponding OTU or network side.

The second demultiplexing unit 330 separates the sixth optical signal and the seventh optical signal to be sent to at least one second OTU from the received fifth optical signal, and sends the sixth optical signal to at least one second OTU. Because the link in direction A fails, the second demultiplexing unit 330 does not send the seventh optical signal to the second multiplexing unit 340 , but sends the seventh optical signal to the first demultiplexing unit 310 . In some embodiments, when the A-direction link fails, the controller controls the second demultiplexing unit 330 to cross the seventh optical signal to the first demultiplexing unit 310; and controls the second demultiplexing unit 340 to The eighth optical signal is optically crossed to the first multiplexing unit 320 . The first demultiplexing unit 310 may perform a demultiplexing operation to separate the optical signal required by the second OTU from the seventh optical signal. In the embodiment of the present application, when the first demultiplexing unit 310 performs the demultiplexing operation, it may perform the demultiplexing operation according to the wavelength of the second OTU. It should be noted that when the A-direction link fails, the first demultiplexing unit 310 will no longer receive the optical signal directly from the first adjacent wavelength division multiplexing device, and the first demultiplexing unit 310 will receive the optical signal from the first demultiplexing Unit 310 receives an optical signal. For example, the optical signal to be sent to the second OTU separated from the seventh optical signal is called optical signal 11 . Then the optical signal 11 is sent to the second OTU. The optical signals other than the optical signal 11 among the seventh optical signals are referred to as optical signals 12 . Send the optical signal 12 to the first multiplexing unit 320 . When there is no optical signal to be sent on the second OTU, the first multiplexing unit 320 may send the optical signal 11 to the second adjacent wavelength division multiplexing device. When there is an optical signal to be sent on the second OTU, the first multiplexing unit 320 directly receives the optical signal to be sent by the second OTU from the second OTU. In order to facilitate the distinction, the optical signal that needs to be sent by the second OTU is called the fourth optical signal. Of course, the second OTU directly connected to the wavelength division multiplexing device can include multiple, and the second OTU that needs to send optical signals at different times may be different. . The number of second OTUs that need to send optical signals may also be different at different times. After receiving the fourth optical signal, the first multiplexing unit 320 may combine the optical signal 12 with the fourth optical signal and send it to the second adjacent wavelength division multiplexing device.

In some embodiments, when the A-direction link fails, the second multiplexing unit 340 will not receive the optical signal from the second demultiplexing unit 330 . If there is an optical signal to be sent on the first OTU, the second multiplexing unit 340 may directly receive the optical signal to be sent on the first OTU from the first OTU. For ease of description, the optical signal to be sent on the first OTU is also referred to as the eighth optical signal herein. The second multiplexing unit 340 sends the eighth optical signal to the first multiplexing unit 320 . Therefore, the first multiplexing unit 320 can multiplex the eighth optical signal, the fourth optical signal, and the optical signal 12 and send them to the second adjacent wavelength division multiplexing device.

In the above-mentioned solution provided by the embodiment of the present application, the optical signal of the local second OTU is combined on the main optical path through the first multiplexing unit 320 on the adding path of the second OTU. The downwave path downwaves the optical signal of the corresponding wavelength to the downwave port of the local second OTU through the second demultiplexing unit 330 . The adding path of the first OTU combines the local optical signal of the first OTU into the main optical path through the second multiplexing unit 340 . The downwave path downwaves the optical signal of the corresponding wavelength to the downwave port of the local first OTU through the first demultiplexing unit 310 . The optical path between the output end of the first multiplexing unit 320 and the input end of the second multiplexing unit 340 can be understood as an adding loop of the second OTU. When the connection path between the first multiplexing unit 320 and the second adjacent wavelength division multiplexing equipment fails, that is, the B-direction link fails, such as a cable failure, the first multiplexing unit 320 passes the optical signal of the local second OTU through the upper The wave circuit merges into the optical path in direction A. The optical path between the output end of the first demultiplexing unit 310 and the input end of the second demultiplexing unit 330 can be understood as a drop-wave loop of the second OTU. When the B-direction link fails, after the downwave optical signal of the second OTU is received by the first demultiplexing unit 310, the optical cross-connection is output to the second demultiplexing unit 330, and the second demultiplexing unit 330 separates the optical signal of the local OTU directly Send to the local second OTU. Similarly, the optical path between the output end of the second multiplexing unit 340 and the input end of the first multiplexing unit 320 can be understood as an adding loop of the first OTU. When the A-direction link fails, such as a cable fault, the second multiplexing unit 340 combines the optical signal of the local first OTU to the B-direction optical path through the add-wave loop. The optical path between the output end of the second demultiplexing unit 330 and the input end of the first demultiplexing unit 310 can be understood as a drop loop of the first OTU. When the A-direction link fails, after the downwave optical signal of the first OTU is received by the second demultiplexing unit 330, the optical cross-connection is output to the first demultiplexing unit 310, and the first demultiplexing unit 310 separates the optical signal of the local first OTU out and directly sent to the local first OTU. This application does not need to configure the local dimension of the optical layer to achieve the optical layer protection in case of failure. It only needs to establish the upwave loop and downwave loop, and does not need to add additional devices such as WSS in the local dimension, which can reduce resources and reduce wavelength division multiplexing. The configuration cost of the equipment.

The structure of each component in the wavelength division multiplexing device is described as follows. For ease of description, the numbering of each component is not given as an example.

FIG. 8 is a schematic structural diagram of another wavelength division multiplexing device in an embodiment of the present application. As shown in FIG. 8 , the first demultiplexing unit includes N+2 output ports including a first input port, a second input port, a first output port, and a second output port. The second demultiplexing unit includes N+2 output ports including the third input port, the fourth input port, the third output port and the fourth output port. The first multiplexing unit includes N+2 input ports including the fifth output port, the sixth output port, the fifth input port and the sixth input port. The second multiplexing unit includes N+2 input ports including the seventh output port, the eighth output port, the seventh input port and the eighth input port, where N is a positive integer.

Wherein, the first input port of the first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device. The second input port of the first demultiplexing unit is optically connected to the third output port of the second demultiplexing unit. The first output port of the first wave splitting unit is optically connected to the fifth input port of the first wave combining unit. The second output port of the first demultiplexing unit is optically connected to the third input port of the second demultiplexing unit. N1 output ports other than the first output port and the second output port in the first demultiplexing unit are directly optically connected to the N1 first OTUs in one-to-one correspondence, and N1 is less than or equal to N.

The sixth input port of the first multiplexing unit is optically connected to the seventh output port of the second multiplexing unit. In the first multiplexing unit, the N input ports except the fifth input port and the sixth input port are directly optically connected to the N second OTUs in one-to-one correspondence. The fifth output port of the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device, and the sixth output port is optically connected to the seventh input port of the second multiplexing unit.

The fourth input port of the second wavelength division unit is optically connected to the second adjacent wavelength division multiplexing device. The fourth output port of the second demultiplexing unit is optically connected to the eighth input port of the second demultiplexing unit. The N2 output ports except the third output port and the fourth output port in the second demultiplexing unit are directly optically connected to the N2 second OTUs in one-to-one correspondence, and N2 is less than or equal to N. The eighth output port of the second multiplexing unit is optically connected to the first adjacent wavelength division multiplexing device, and the input ports of N1 other than the seventh input port and the eighth input port in the second multiplexing unit are connected to N1 first OTUs One to one direct optical connection.

The wave splitting unit and the wave combining unit involved in the present application may adopt the structures shown in any of the following implementation manners. In a first possible implementation manner, the wavelength splitting unit includes a coupler and a WSS. The multiplexing unit includes an optical splitter and a WSS. In a second possible implementation manner, the demultiplexing unit includes a WSS. The multiplexing unit includes WSS. In a third possible implementation manner, the demultiplexing unit includes an optical switch and a WSS. The multiplexing unit includes an optical switch and a WSS. The above three possible implementation manners are described below with reference to the accompanying drawings.

In Example 1, the structure of the wavelength division multiplexing device will be described when the first possible implementation manner is adopted for the structure of the wave splitting unit and the wave combining unit with reference to FIGS. 9 to 12 . The wave splitting unit includes a coupler and WSS, and the wave combining unit includes an optical splitter and a WSS. For ease of distinction, the coupler included in the first wave splitting unit is called a first coupler, and the coupler included in the second wave splitting unit is called a second coupler as an example. The optical splitter included in the first multiplexing unit is called a first optical splitter, and the optical splitter included in the second multiplexing unit is called a second optical splitter. The WSSs included in the first to fourth demultiplexing units are respectively referred to as first to fourth WSSs.

FIG. 9 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 1 of the present application. As shown in FIG. 9 , the input end of the first coupler is respectively optically connected to the output end of the first adjacent wavelength division multiplexing device and the second WSS. The output end of the first coupler is optically connected to the input end of the first WSS. The output end of the first WSS is respectively optically connected to the input end of the third WSS and the input end of the second coupler, and the output end of the first WSS is also directly optically connected to at least one first OTU. The input end of the third WSS is also optically connected to the output end of the second optical splitter, and the input end of the third WSS is also directly optically connected to at least one second OTU. The output end of the third WSS is optically connected to the input end of the first optical splitter. Output ends of the first optical splitter are optically connected to the second adjacent wavelength division multiplexing device and the fourth WSS respectively. The input end of the second coupler is also optically connected to the second adjacent wavelength division multiplexing device. The output end of the second coupler is optically connected to the input end of the second WSS, the output end of the second WSS is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to at least one second OTU. The input end of the fourth WSS is also directly optically connected to at least one first OTU, the output end of the fourth WSS is optically connected to the input end of the second optical splitter, and the output end of the second optical splitter is also connected to the first adjacent wavelength division multiplexing Device optical connection.

In a possible implementation manner, the wavelength division multiplexing device further includes at least four optical amplifiers, which are respectively a first optical amplifier, a second optical amplifier, a third optical amplifier, and a fourth optical amplifier.

FIG. 10 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 1 of the present application. Referring to Fig. 10, the first optical amplifier is arranged between the first coupler and the first WSS; the second optical amplifier is arranged between the first coupler and the second WSS; the third optical amplifier is arranged in the first optical splitter and between the third WSS; the fourth optical amplifier is arranged between the second optical splitter and the fourth WSS. The amplifier mentioned above is used to adjust the power of the input signal. Exemplarily, the first optical amplifier is deployed in the first demultiplexing unit, the second optical amplifier is deployed in the first multiplexing unit, the third optical amplifier is deployed in the second demultiplexing unit, and the fourth optical amplifier is deployed in the first demultiplexing unit. In the two multiplexer unit. In some embodiments, the above-mentioned first WSS and fourth WSS may be deployed on the same single board, or may be deployed on different single boards. The second WSS and the third WSS may be deployed on the same single board, or may be deployed on different single boards. In some other embodiments, the first coupler, the first optical amplifier (optical amplifier, OA), the first WSS, the second optical splitter, the fourth OA, and the fourth WSS are deployed on the same single board. The second WSS, the second OA, the second coupler, the first optical splitter, the third OA, and the third WSS are deployed on the same single board.

FIG. 10 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 1 of the present application. As shown in FIG. 11 , the first optical amplifier is deployed at the input end of the first demultiplexing unit, and the first coupler of the first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the first optical amplifier. The third optical amplifier is arranged at the output end of the first multiplexing unit, and the first optical splitter of the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the second optical amplifier. The second optical amplifier is arranged at the input end of the second wavelength division unit, and the second coupler of the second wavelength division unit is optically connected to the second adjacent wavelength division multiplexing device through the second optical amplifier. The fourth optical amplifier is deployed at the output end of the second multiplexing unit, and the second optical splitter of the second multiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the fourth optical amplifier.

FIG. 12 is a schematic diagram of the connection relationship of various ports in the wavelength division multiplexing device provided in Example 1 of the present application. FIG. 12 describes the connection relationship of each port in the wavelength division multiplexing device from the perspective of the ports described in FIG. 8 . As shown in FIG. 12 , the input end of the first coupler includes a first input port and a second input port. The first WSS may adopt 1*(N+2) WSS. The first WSS includes one input port and N+2 output ports. The N+2 output ports include the first output port, the second output port and other N output ports for connecting to the OTU. The output port of the first coupler is optically connected to the input port of the first WSS. The second branching unit includes a second coupler and a second WSS, and the second coupler includes a third input port and a fourth input port. The second WSS may use 1*(N+2) WSS. The second WSS includes one input port and N+2 output ports. The N+2 output ports include the third output port, the fourth output port and other N output ports for connecting to the OTU. The output port of the second coupler is optically connected to the input port of the second WSS. The first multiplexing unit includes a first optical splitter and a third WSS, and the first optical splitter includes a fifth output port and a sixth output port. The third WSS may adopt (N+2)*1 WSS. The third WSS includes N+2 input ports and one output port. The N+2 input ports include the fifth input port, the sixth input port and other N input ports for connecting to the OTU. The input port of the first optical splitter is optically connected to the output port of the third WSS; the second multiplexer includes a second optical splitter and a fourth WSS, and the second optical splitter includes a seventh output port and an eighth output port. The fourth WSS may adopt (N+2)*1 WSS. The fourth WSS includes N+2 input ports and one output port. The N+2 input ports include the seventh input port, the eighth input port and other N input ports for connecting to the OTU. The input port of the second optical splitter is optically connected to the output port of the fourth WSS.

As an example, take the wavelength of the first OTU as λa as an example, and the wavelength of the second OTU as λb. On the add-wave path of the second OTU, the local add-wave optical signal of the second OTU is combined into the B-direction main optical path through the multiplex port (input port) of the third WSS. On the downwave path of the second OTU, the optical signal of the corresponding wavelength is downwaved to the local downwave port of the second OTU through the second WSS demultiplexing port (output port). On the upwave path of the first OTU, the local upwave optical signal of the first OTU is combined into the A-direction main optical path through the multiplex port (input port) of the fourth WSS. On the downwave path of the first OTU, the optical signal of the corresponding wavelength is downwaved to the local downwave port of the first OTU through the first WSS demultiplexing port (output port).

For the B-direction link, during normal operation, the third WSS combines the pass-through wavelength (that is, the optical signal from the first demultiplexing unit) and the optical signal of the local add wavelength λb. Under the control of the controller, the third WSS performs optical cross-connection, and inputs the combined optical signal into the B-direction main optical path. The optical path from the third WSS to the input port of the fourth WSS through the output port of the first optical splitter may be understood as an adding circuit of the second OTU. The output port of the first WSS reaches the second WSS through the second coupler, which can be understood as a drop-wave loop of the second OTU.

When the optical cable connected to the second adjacent wavelength division multiplexing device in the direction B fails, the third WSS sends the optical signal of the wavelength λb of the second OTU to the fourth WSS through the add loop. The third WSS can perform wavelength cross-connection under the control of the controller to complete the switching of the signal route of the upper wavelength λb. When the optical cable in direction B fails, the optical signal of wavelength λb input from direction A dimensionally enters the first WSS. The first WSS performs optical crossover under the control of the controller, and inputs the optical signal of the wavelength λb to the drop circuit of the wavelength λb through the demultiplexing port of the first WSS. The optical signal of the downwave wavelength λb is combined into the main optical path from the B direction to the A direction through the second coupler of the downwave circuit. The second WSS implements the optical cross-connection, and inputs the optical signal of the wavelength λb to the receiving port of the second OTU, thereby completing the downwave route switching of the downwave wavelength λb.

Similarly, for the A-direction link, during normal operation, the controller controls the fourth WSS in the A-direction to combine the pass-through wavelength (that is, the optical signal from the first demultiplexing unit) and the optical signal at the local add-on wavelength λa. The fourth WSS performs an optical cross-connection, and inputs the combined optical signal into the main optical path of the A direction. The adding loop of the first OTU may be: the fourth WSS→the output port of the second optical splitter→the input port of the second WSS. The output port of the second WSS→the first coupler→the first WSS can be understood as the drop-wave circuit of the first OTU. When the optical cable connected to the first adjacent wavelength division multiplexing equipment in the direction A fails, the fourth WSS, under the control of the controller, performs wavelength cross-connection, and passes the optical signal of the wavelength λa of the first OTU through the adding circuit It is sent to the third WSS to complete the switching of the signal route of the upper wavelength λa. When the optical cable in direction A fails, the signal light of wavelength λa is input from direction B. After entering the second WSS, the second WSS is equipped with a corresponding wavelength crossover, and enters the downlink signal of wavelength λa from the sub-wavelength port of the second WSS. wave circuit. The downwave wavelength λa is combined into the main optical path from A to B through the downwave circuit. The first WSS is configured with a rule for wavelength crossing down to the receiving port of the connected first OTU to complete the downwave wavelength λa downwave route switching.

In Example 2, the structure of the wavelength division multiplexing device will be described when the second possible implementation manner is adopted for the structures of the wavelength division unit and the multiplexer unit in combination with FIGS. 13-14 . The demultiplexing unit and the multiplexing unit in the wavelength division multiplexing equipment include WSS. The first demultiplexing unit and the second demultiplexing unit respectively include a WSS with two input ports and N+2 output ports, that is, 2*(N+2)WSS. The first multiplexing unit and the second multiplexing unit respectively include a WSS with two output ports and N+2 input ports, that is, (N+2)*2WSS. Fig. 13 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 2 of the present application. As shown in Fig. 13, taking the WSS of the first demultiplexing unit as the first WSS as an example, the WSS of the second demultiplexing unit is called For the second WSS, the WSS of the first multiplexing unit is called the third WSS and the WSS of the second multiplexing unit is called the fourth WSS as an example. In some embodiments, the first WSS and the fourth WSS may be deployed on the same single board, or may be deployed on different single boards. The second WSS and the third WSS may be deployed on the same single board, or may be deployed on different single boards.

In a possible implementation manner, the wavelength division multiplexing device further includes at least four optical amplifiers, namely first to fourth optical amplifiers. Fig. 14 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 2 of the present application. As shown in Fig. 14, the first optical amplifier is deployed at the input end of the first demultiplexing unit, and the first The coupler is optically connected to the first adjacent wavelength division multiplexing device through the first optical amplifier. The second optical amplifier is arranged at the input end of the second wavelength division unit, and the second coupler of the second wavelength division unit is optically connected to the second adjacent wavelength division multiplexing device through the second optical amplifier. The third optical amplifier is deployed at the output end of the first multiplexing unit, and the third optical switch of the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the third optical amplifier. The fourth optical amplifier is deployed at the output end of the second multiplexing unit, and the fourth optical switch of the second multiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the fourth optical amplifier.

In some embodiments, the first WSS, the first optical amplifier, the fourth WSS, and the fourth optical amplifier may be deployed on the same single board, or may be deployed on different single boards. The second WSS, the second optical amplifier, the third WSS and the third optical amplifier may be deployed on the same single board, or may be deployed on different single boards.

As an example, take the wavelength of the first OTU as λa as an example, and the wavelength of the second OTU as λb. For the B-direction link, during normal operation, the third WSS combines the pass-through wavelength (that is, the optical signal from the first WSS) and the optical signal of the local add wavelength λb. Under the control of the controller, the third WSS performs optical cross-connection, and inputs the combined optical signal into the B-direction main optical path after passing through the third OA.

The input port of the third WSS→the fourth WSS can be understood as the wave adding loop of the second OTU. The output port of the first WSS→the second WSS can be understood as the drop-wave loop of the second OTU. When the optical cable connected to the second adjacent wavelength division multiplexing equipment in the direction B fails, the third WSS performs optical cross-connection under the control of the controller, and passes the optical signal of the wavelength λb of the second OTU through the adding circuit It is sent to the fourth WSS to complete the switching of the signal route of the upwave wavelength λb. When the optical cable in direction B fails, the optical signal of wavelength λb input from direction A dimensionally enters the first WSS. The first WSS performs optical crossover under the control of the controller, and inputs the optical signal of the wavelength λb to the drop circuit of the wavelength λb through the demultiplexing port of the first WSS. After receiving the optical signal of the wavelength λb through the downwave circuit, the second WSS combines the optical signal of the downwave wavelength λb into the main optical path in the direction B. The second WSS implements the optical cross-connection, and inputs the optical signal of the wavelength λb to the receiving port of the second OTU, thereby completing the downwave route switching of the downwave wavelength λb.

Similarly, for the A-direction link, during normal operation, the controller controls the fourth WSS in the A-direction to combine the pass-through wavelength (that is, the optical signal from the first demultiplexing unit) and the optical signal at the local add-on wavelength λa. The fourth WSS performs an optical cross-connection, and inputs the combined optical signal into the main optical path from the B direction to the A direction. The adding loop of the first OTU may be: the input port of the fourth WSS→the second WSS. The output port of the second WSS→the first WSS can be understood as the drop-wave circuit of the first OTU. When the optical cable connected to the first adjacent wavelength division multiplexing equipment in the direction A fails, the fourth WSS, under the control of the controller, performs wavelength cross-connection, and passes the optical signal of the wavelength λa of the first OTU through the adding circuit It is sent to the third WSS to complete the switching of the signal route of the upper wavelength λa. When the optical cable in direction A fails, the optical signal of wavelength λa is input from direction B and enters the second WSS. The second WSS performs optical cross-connection under the control of the controller, and enters the drop-wave circuit of the wavelength λa through the split-wave port of the second WSS. Under the control of the controller, the first WSS combines the optical signal of the downstream wavelength λa into the main optical path from the A direction to the B direction. The first WSS executes the optical cross-connection to output the optical signal of the downwave wavelength λa to the receiving port of the first OTU, and completes the downwave route switching of the downwavelength wavelength λa.

This application does not need to configure the local dimension of the optical layer to achieve optical layer protection in case of failure. It only needs to establish the upwave loop and downwave loop, and does not need to add additional devices such as WSS in the local dimension, reducing the configuration cost of wavelength division multiplexing equipment. .

In Example 3, the structure of the wavelength division multiplexing device will be described when the second possible implementation manner is adopted for the structure of the wave splitting unit and the wave combining unit with reference to FIG. 15-FIG. 18 . The wavelength division unit and multiplexer unit in the wavelength division multiplexing equipment include optical switch and WSS. For ease of distinction, the optical switch included in the first demultiplexing unit is called a first optical switch, and the optical switch included in the second demultiplexing unit is called a second optical switch as an example. The optical switch included in the first multiplexing unit is called a third optical switch, and the optical switch included in the second multiplexing unit is called a fourth optical switch. The WSS included in the first wave splitting unit is called the first WSS, the WSS included in the second wave splitting unit is called the second WSS, the WSS included in the first wave combining unit is called the third WSS, and the WSS included in the second wave combining unit is called the third WSS. Called the fourth WSS. FIG. 15 is a schematic structural diagram of a wavelength division multiplexing device provided in Example 3 of the present application. As shown in FIG. 15 , the input end of the first optical switch is respectively optically connected to the output end of the first adjacent wavelength division multiplexing device and the second WSS. The output end of the first optical switch is optically connected to the input end of the first WSS. The output end of the first WSS is respectively optically connected to the input end of the third WSS and the input end of the second optical switch, and the output end of the first WSS is also directly optically connected to at least one first OTU. The input end of the third WSS is also optically connected to the output end of the fourth optical switch, and the input end of the third WSS is also directly optically connected to at least one second OTU. The output end of the third WSS is optically connected to the input end of the third optical switch. Output ends of the first optical splitter are optically connected to the second adjacent wavelength division multiplexing device and the fourth WSS respectively. The input end of the second optical switch is also optically connected to the second adjacent wavelength division multiplexing device. The output end of the second optical switch is optically connected to the input end of the second WSS, the output end of the second WSS is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to at least one second OTU. The input of the fourth WSS is also directly optically connected to at least one first OTU. The output end of the fourth WSS is optically connected to the input end of the fourth optical switch, and the output end of the fourth optical switch is also optically connected to the first adjacent wavelength division multiplexing device.

In a possible implementation manner, the wavelength division multiplexing device further includes at least four optical amplifiers, namely first to fourth optical amplifiers.

FIG. 16 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 3 of the present application. As shown in Figure 16, the first optical amplifier is arranged between the first optical switch and the first WSS; the second optical amplifier is arranged between the second optical switch and the second WSS; the third optical amplifier is arranged between the third optical switch and between the third WSS; the fourth optical amplifier is arranged between the fourth optical switch and the fourth WSS. The amplifier mentioned above is used to adjust the power of the input signal. Exemplarily, the first optical amplifier is deployed in the first demultiplexing unit, the second optical amplifier is deployed in the first multiplexing unit, the third optical amplifier is deployed in the second demultiplexing unit, and the fourth optical amplifier is deployed in the first demultiplexing unit. In the two multiplexer unit. In some embodiments, the first WSS and the fourth WSS may be deployed on the same single board. The second WSS and the third WSS can be deployed on the same single board. In some other embodiments, the first optical switch, the first OA, the first WSS, the fourth optical switch, the fourth OA, and the fourth WSS are deployed on the same single board. The second WSS, the second OA, the second optical switch, the third optical switch, the third OA, and the third WSS are deployed on the same board.

FIG. 17 is a schematic structural diagram of another wavelength division multiplexing device provided in Example 3 of the present application. As shown in Figure 17, the first optical amplifier is deployed at the input end of the first demultiplexing unit, and the first optical switch of the first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the first optical amplifier; the second The optical amplifier is deployed at the input end of the second demultiplexing unit, and the second optical switch of the second demultiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the second optical amplifier; the third optical amplifier is deployed at the first multiplexer At the output end of the unit, the third switch of the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the third optical amplifier; the fourth optical amplifier is deployed at the output end of the second multiplexing unit, and the second multiplexing unit The fourth optical switch of the wave unit is optically connected to the first adjacent wavelength division multiplexing device through the fourth optical amplifier. In some embodiments, the first optical switch, the first OA, the first WSS, the fourth optical switch, the fourth OA, and the fourth WSS are deployed on the same single board. The second WSS, the second OA, the second optical switch, the third optical switch, the third OA, and the third WSS are deployed on the same board.

FIG. 18 is a schematic diagram of the connection relationship of each port in the wavelength division multiplexing device provided in Example 3 of the present application. FIG. 18 describes the connection relationship of each port in the wavelength division multiplexing device from the port perspective described in FIG. 8 . As shown in FIG. 18, the input end of the first optical switch includes a first input port and a second input port. The first WSS may adopt 1*(N+2) WSS. The first WSS includes one input port and N+2 output ports. The N+2 output ports include the first output port, the second output port and other N output ports for connecting to the OTU. The output port of the first optical switch is optically connected to the input port of the first WSS through the first OA. The second demultiplexing unit includes a second optical switch and a second WSS, and the second optical switch includes a third input port and a fourth input port. The second WSS may use 1*(N+2) WSS. The second WSS includes one input port and N+2 output ports. The N+2 output ports include the third output port, the fourth output port and other N output ports for connecting to the OTU. The output port of the second optical switch is optically connected to the input port of the second WSS through the second OA. The first multiplexing unit includes a third optical switch and a third WSS, and the third optical switch includes a fifth output port and a sixth output port. The third WSS may adopt (N+2)*1 WSS. The third WSS includes N+2 input ports and one output port. The N+2 input ports include the fifth input port, the sixth input port and other N input ports for connecting to the OTU. The input port of the third optical switch is optically connected to the output port of the third WSS through the third OA; the second multiplexing unit includes a fourth optical switch and a fourth WSS, and the fourth optical switch includes a seventh output port and an eighth output port . The fourth WSS may adopt (N+2)*1 WSS. The fourth WSS includes N+2 input ports and one output port. The N+2 input ports include the seventh input port, the eighth input port and other N input ports for connecting to the OTU. The input port of the fourth optical switch is optically connected to the output port of the fourth WSS through the fourth OA.

As an example, take the wavelength of the first OTU as λa as an example, and the wavelength of the second OTU as λb. For the B-direction link, during normal operation, the third WSS combines the pass-through wavelength (that is, the optical signal from the first demultiplexing unit) and the optical signal of the local add wavelength λb. Under the control of the controller, the third WSS performs optical cross-connection, and inputs the combined optical signal into the B-direction main optical path. The third WSS sends the combined optical signal to the third optical switch through the third OA. Under the control of the controller, the third optical switch conducts between the input port of the third optical switch and the fifth output port. The third optical switch sends to the second adjacent wavelength division multiplexing device through the fifth output port.

The third WSS → the third OA → the sixth output port of the third optical switch → the seventh input port of the fourth WSS, which can be understood as the adding loop of the second OTU. The second output port of the first WSS→the third input port of the second optical switch→the second OA→the second WSS can be understood as a drop-wave loop of the second OTU. When the optical cable connected to the second adjacent wavelength division multiplexing device in the direction B fails, the third WSS sends the optical signal of the wavelength λb of the second OTU to the fourth WSS through the adding loop. Under the control of the controller, the third optical switch connects the input port to the sixth output port, and sends the optical signal of wavelength λb to the fourth WSS. When the optical cable in the direction B fails, the first input port of the first optical switch is connected to the output port, and the optical signal of wavelength λb input from the direction A dimension enters the first WSS. The first WSS performs optical crossover under the control of the controller, and inputs the optical signal of the wavelength λb to the drop circuit of the wavelength λb through the demultiplexing port of the first WSS. The third input port of the second optical switch is connected to the output port. The optical signal of the downwave wavelength λb is sent to the second WSS through the second optical switch of the downwave circuit. The second WSS implements the optical cross-connection, and inputs the optical signal of the wavelength λb to the receiving port of the second OTU, thereby completing the downwave route switching of the downwave wavelength λb.

Similarly, for the A-direction link, during normal operation, the controller controls the fourth WSS in the A-direction to combine the pass-through wavelength (that is, the optical signal from the second demultiplexing unit) and the optical signal of the local add wavelength λa. The fourth WSS performs an optical cross-connection, and inputs the combined optical signal into the main optical path of the A direction. The seventh output port of the fourth optical switch is connected to the input port. The adding loop of the first OTU may be: the eighth input port of the fourth WSS→the fourth OA→the seventh output port of the fourth optical switch→the sixth input port of the third WSS. The third output port of the second WSS→the second input port of the first optical switch→the first WSS can be understood as a drop loop of the first OTU. When the optical cable connected to the first adjacent wavelength division multiplexing equipment in the direction A fails, the fourth WSS performs wavelength cross-connection under the control of the controller, and sends the optical signal of the wavelength λa of the first OTU to the fourth WSS. The light is turned on, and the input port of the fourth optical switch is connected to the seventh output port under the control of the controller, so that the fourth optical switch sends the optical signal of wavelength λa to the third WSS, and completes the switching of the signal route of the wavelength λa. When the optical cable in direction A fails, the signal light of wavelength λa is input from direction B. After entering the second WSS, the second WSS performs optical cross-connection under the control of the controller, and sends it to the first optical fiber through the fourth output port. switch. The second input port on the first optical switch is connected to the output port, so that the signal light of wavelength λa enters the first WSS, and is sent to the first OTU by the demultiplexing port of the first WSS. Optical signals other than the downwave wavelength λa are combined into the main optical path in direction B through the downwave circuit.

Based on the above embodiments, an embodiment of the present application further provides an optical signal processing method, and the method may be applied to the wavelength division multiplexing device described in any of the above embodiments. The wavelength division multiplexing device includes a first wave splitting unit, a first wave combining unit, a second wave splitting unit and a second wave combining unit. FIG. 19 is a schematic flowchart of an optical signal processing method according to an embodiment of the present application. As shown in Fig. 19, the method may include the following steps.

1901. Receive a first optical signal from the first adjacent wavelength division multiplexing device.

1902. Use the first demultiplexing unit to separate a second optical signal to be sent to at least one first optical transmission unit OTU from the first optical signal, and directly distribute the second optical signal to the at least one optical transmission unit OTU. A first OTU.

1903. When the wavelength division multiplexing device is normally connected to the second adjacent wavelength division multiplexing device, control the first wavelength division unit to convert the first optical signal except the second optical signal The third optical signal is sent to the first multiplexing unit, and the third optical signal is sent to the second adjacent wavelength division multiplexing device through the first multiplexing unit.

1904. When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, control the first wavelength division unit to convert the first optical signal except the second optical signal The third optical signal is sent to the second demultiplexing unit.

1905. Control the second demultiplexing unit to separate a fourth optical signal to be sent to the at least one second OTU from the third optical signal, and send the fourth optical signal to the at least one second OTU through the second demultiplexing unit. The optical signal is sent to the at least one second OTU.

1906. Control the second demultiplexing unit to send a fifth optical signal in the third optical signal except the fourth optical signal to the second multiplexing unit, and send the fifth optical signal through the second multiplexing unit sending the fifth optical signal to the first adjacent wavelength division multiplexing device.

In a possible implementation manner, the method further includes: receiving an optical signal from at least one second OTU. When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, control the first multiplexing unit to send the optical signal from the at least one second OTU to the first adjacent Wavelength division multiplexing equipment. Optionally, sending the fifth optical signal to the second multiplexing unit through the second multiplexing unit in step 1906 above specifically includes: combining the fifth optical signal and After the optical signal from the at least one second OTU is multiplexed and processed, it is sent to the first adjacent wavelength division multiplexing device.

In a possible implementation manner, the method further includes: receiving an optical signal from at least one first OTU. The fifth optical signal and the optical signal from the at least one second OTU are combined and processed by the second multiplexing unit, and then sent to the first adjacent wavelength division multiplexing device, specifically including: The second multiplexing unit multiplexes the fifth optical signal, the optical signal from the at least one first OTU, and the optical signal from the at least one second OTU, and sends them to the first adjacent wave Multiplexing equipment.

In a possible implementation manner, controlling the first demultiplexing unit to send a third optical signal in the first optical signal except the second optical signal to the second demultiplexing unit specifically includes : controlling the first demultiplexing unit to perform optical crossover switching, and optically crossing the third optical signal in the first optical signal except the second optical signal to the output port connected to the second demultiplexing unit .

The structures of the first wave splitting unit, the second wave splitting unit, the first wave combining unit and the second wave combining unit are as described above, and will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and when run on a computer or a processor, the computer or processor executes some or all of the steps performed by the control component in any embodiment of the present application.

The embodiment of the present application also provides a computer program product containing instructions, which, when run on a computer or a processor, causes the computer or processor to execute some or all of the steps performed by the control component in any embodiment of the present application.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c ", where a, b, c can be single or multiple. In the text description of this application, the character "/" generally indicates that the contextual objects are an "or" relationship. In the formulas of this application, the character "/" indicates that the front and back related objects are in a "division" relationship. Additionally, in this application, the word "exemplarily" is used to mean an example, illustration or illustration. Any embodiment or design described herein as "example" is not to be construed as preferred or advantageous over other embodiments or designs. Or it can be understood that the use of the word example is intended to present a concept in a specific manner, and does not constitute a limitation to the application.

It can be understood that the various numbers involved in the present application are only for convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic. The terms "first", "second" and similar expressions are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, of a sequence of steps or elements. A method, system, product or device is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product or device.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the solutions defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations or equivalents within the scope of the application.

Apparently, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if the modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application also intends to include these modifications and variations.

Claims

A wavelength division multiplexing device, characterized in that the wavelength division multiplexing device includes a first wave division unit, a first wave combination unit, a second wave division unit and a second wave combiner unit; wherein:

The input end of the first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device and the output end of the second demultiplexing unit, and the output end of the first demultiplexing unit is respectively connected to the first The input end of the multiplexing unit is optically connected to the input end of the second demultiplexing unit; the output end of the first demultiplexing unit is also directly optically connected to at least one first optical transmission unit OTU;

The input end of the first multiplexing unit is also optically connected to the output end of the second multiplexing unit, and the input end of the first multiplexing unit is also directly optically connected to at least one second OTU; the first multiplexing unit The output end of the unit is optically connected to the second adjacent wavelength division multiplexing device and the input end of the second multiplexing unit;

The input end of the second demultiplexing unit is also optically connected to the second adjacent wavelength division multiplexing device, the output end of the second demultiplexing unit is also optically connected to the input end of the second multiplexing unit, and the The output end of the second demultiplexing unit is also directly optically connected to the at least one second OTU;

The input end of the second multiplexing unit is also directly optically connected to the at least one first OTU; the output end of the second multiplexing unit is also optically connected to the first adjacent wavelength division multiplexing device;

Wherein, the first demultiplexing unit is configured to separate the second optical signal and the third optical signal from the received first optical signal, send the second optical signal to the first OTU, and When the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device are connected normally, send the third optical signal to the first multiplexing unit; When two adjacent wavelength division multiplexing devices fail to connect, send the third optical signal to the second wavelength division unit;

The first multiplexing unit is configured to send the received fourth optical signal to the second adjacent wavelength division multiplexing device when the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device is normal. When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, the fourth optical signal is sent to the second multiplexing unit; the fourth optical signal is at least including an optical signal from said at least one second OTU;

The second demultiplexing unit is configured to separate the sixth optical signal and the seventh optical signal from the received fifth optical signal, send the sixth optical signal to the second OTU, and When the division multiplexing device is normally connected to the first adjacent wavelength division multiplexing device, the seventh optical signal is sent to the second multiplexing unit, and when the wavelength division multiplexing device is connected to the first adjacent wavelength division multiplexing unit When the wavelength division multiplexing device fails to connect, sending the seventh optical signal to the first demultiplexing unit;

The second multiplexing unit is configured to send the received eighth optical signal to the second adjacent wavelength division multiplexing device when the connection between the wavelength division multiplexing device and the first adjacent wavelength division multiplexing device is normal. When the wavelength division multiplexing device fails to connect with the first adjacent wavelength division multiplexing device, the eighth optical signal is sent to the first multiplexing unit; the eighth optical signal is at least An optical signal from the at least one first OTU is included.
Wavelength division multiplexing equipment as claimed in claim 1, is characterized in that:

The first demultiplexing unit includes N+2 output ports including a first input port, a second input port, a first output port and a second output port, and the second demultiplexing unit includes a third input port, a fourth N+2 output ports including the input port, the third output port and the fourth output port, the first multiplexing unit includes the fifth output port, the sixth output port, the fifth input port and the sixth input port in N+2 input ports within, the second multiplexing unit includes N+2 input ports including the seventh output port, the eighth output port, the seventh input port and the eighth input port, N is a positive integer ;

Wherein, the first input port is optically connected to the first adjacent wavelength division multiplexing device, the second input port is optically connected to the third output port, and the first output port is optically connected to the fifth input The port is optically connected; the second output port is optically connected to the third input port; the N1 output ports other than the first output port and the second output port in the first demultiplexing unit are connected to the N1 all The first OTU one-to-one corresponds to the direct optical connection, and N1 is less than or equal to N;

The sixth input port is optically connected to the seventh output port, and the N2 input ports other than the fifth input port and the sixth input port in the first multiplexing unit are connected to the N2 second input ports. Two OTUs correspond to one-to-one direct optical connections, the fifth output port is optically connected to the second adjacent wavelength division multiplexing device, and the sixth output port is optically connected to the seventh input port;

The fourth input port is optically connected to the second adjacent wavelength division multiplexing device, and the fourth output port is optically connected to the eighth input port; The port and the N2 output ports other than the fourth output port are directly optically connected to the N2 second OTUs in one-to-one correspondence, and N2 is less than or equal to N;

The eighth output port is optically connected to the first adjacent wavelength division multiplexing device, and the input ports of N1 other than the seventh input port and the eighth input port in the second multiplexing unit are connected to the N1 The first OTU corresponds to the direct optical connection one by one.
The wavelength division multiplexing device as claimed in claim 1 or 2, characterized in that:

The first wave splitting unit includes a first coupler and a first wavelength selective switch WSS, the second wave splitting unit includes a second coupler and a second WSS, and the first wave combining unit includes a first optical splitter and a The third WSS, the second wave combining unit includes a second optical splitter and a fourth WSS;

The input end of the first coupler is respectively optically connected to the output end of the first adjacent wavelength division multiplexing device and the second WSS, and the output end of the first coupler is connected to the input end of the first WSS The output end of the first WSS is optically connected to the input end of the third WSS and the input end of the second coupler, and the output end of the first WSS is also connected to at least one first OTU direct optical connection;

The input end of the third WSS is also optically connected to the output end of the second optical splitter, the input end of the third WSS is also directly optically connected to at least one second OTU, and the output end of the third WSS is optically connected to the The input end of the first optical splitter is optically connected, and the output end of the first optical splitter is optically connected to the second adjacent wavelength division multiplexing device and the fourth WSS respectively;

The input end of the second coupler is also optically connected to the second adjacent wavelength division multiplexing device, the output end of the second coupler is optically connected to the input end of the second WSS, and the output of the second WSS The end is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to the at least one second OTU;

The input end of the fourth WSS is also directly optically connected to at least one first OTU, the output end of the fourth WSS is optically connected to the input end of the second optical splitter, and the output end of the second optical splitter is also connected to the The optical connection to the first adjacent wavelength division multiplexing device.
The wavelength division multiplexing device according to claim 3, wherein the first WSS and the fourth WSS are deployed on the same single board; the second WSS and the third WSS are deployed on the same on a veneer.
The wavelength division multiplexing device according to claim 3 or 4, wherein the first demultiplexing unit further comprises a first optical amplifier, and the first optical amplifier is arranged between the first coupler and the first optical amplifier. Between the wavelength selective switch WSS;

The second demultiplexing unit further includes a second optical amplifier, and the second optical amplifier is disposed between the first coupler and the second WSS;

The first multiplexing unit further includes a third optical amplifier, and the third optical amplifier is arranged between the first optical splitter and the third WSS;

The second multiplexing unit further includes a fourth optical amplifier, and the fourth optical amplifier is arranged between the second optical splitter and the fourth WSS.
The wavelength division multiplexing device as claimed in claim 1 or 2, characterized in that:

The first wave splitting unit and the second wave splitting unit are respectively WSS; the first wave combining unit and the second wave combining unit are respectively WSS.
The wavelength division multiplexing device as claimed in claim 6, characterized in that:

The WSSs respectively included in the first wave splitting unit and the second wave combining unit are deployed on the same board, and the WSSs respectively included in the second wave splitting unit and the first wave combining unit are deployed on the same board. veneer.
The wavelength division multiplexing device as claimed in claim 1 or 2, characterized in that:

The first demultiplexing unit includes a first optical switch and a first WSS, the second demultiplexing unit includes a second optical switch and a second WSS, and the first multiplexing unit includes a third optical switch and a third WSS , the second multiplexing unit includes a fourth optical switch and a fourth WSS; wherein,

The input end of the first optical switch is respectively optically connected to the output end of the first adjacent wavelength division multiplexing device and the second WSS, and the output end of the first optical switch is connected to the input end of the first WSS The output end of the first WSS is optically connected to the input end of the third WSS and the input end of the second optical switch, and the output end of the first WSS is also connected to at least one first OTU direct optical connection;

The input end of the third WSS is also optically connected to the output end of the fourth optical switch, the input end of the third WSS is also directly optically connected to at least one second OTU, and the output end of the third WSS is optically connected to the The input end of the third optical switch is optically connected, and the output end of the first optical splitter is respectively optically connected to the second adjacent wavelength division multiplexing device and the fourth WSS;

The input end of the second optical switch is also optically connected to the second adjacent wavelength division multiplexing device, the output end of the second optical switch is optically connected to the input end of the second WSS, and the output of the second WSS The end is also optically connected to the fourth WSS, and the output end of the second WSS is also directly optically connected to the at least one second OTU;

The input end of the fourth WSS is also directly optically connected to at least one first OTU, the output end of the fourth WSS is optically connected to the input end of the fourth optical switch, and the output end of the fourth optical switch is also connected to the The optical connection to the first adjacent wavelength division multiplexing device.
The wavelength division multiplexing device according to claim 8, wherein the first demultiplexing unit further comprises a first optical amplifier, and the first optical amplifier is arranged between the first optical switch and the first wavelength selection Switch between WSS;

The second demultiplexing unit further includes a second optical amplifier, and the second optical amplifier is disposed between the second optical switch and the second WSS;

The first multiplexing unit further includes a third optical amplifier, and the third optical amplifier is arranged between the third optical switch and the third WSS;

The second multiplexing unit further includes a fourth optical amplifier, and the fourth optical amplifier is disposed between the fourth optical switch and the fourth WSS.
The wavelength division multiplexing device according to any one of claims 1-4 and 6-9, wherein the wavelength division multiplexing device further comprises a first optical amplifier, a second optical amplifier, a third optical amplifier, and the fourth optical amplifier;

The first optical amplifier is deployed at the input end of the first demultiplexing unit, and the first demultiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the first optical amplifier;

The second optical amplifier is deployed at the input end of the second demultiplexing unit, and the second demultiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the second optical amplifier;

The third optical amplifier is deployed at the output end of the first multiplexing unit, and the first multiplexing unit is optically connected to the second adjacent wavelength division multiplexing device through the third optical amplifier;

The fourth optical amplifier is deployed at the output end of the second multiplexing unit, and the second multiplexing unit is optically connected to the first adjacent wavelength division multiplexing device through the fourth optical amplifier.
The wavelength division multiplexing device according to any one of claims 1-10, characterized in that, the wavelength division multiplexing device further comprises a controller for connecting the wavelength division multiplexing device to the second adjacent When the wavelength division multiplexing device fails to connect, control the first demultiplexing unit to cross the third optical signal to the second demultiplexing unit; and control the first demultiplexing unit to cross the fourth optical signal The optical signal is optically crossed to the second multiplexing unit.
The wavelength division multiplexing device according to claim 11, wherein the controller is further configured to, when the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device is normal, control the The first demultiplexing unit crosses the third optical signal to the first multiplexing unit; and controls the first multiplexing unit to cross the fourth optical signal to the second adjacent Wavelength division multiplexing equipment.
The wavelength division multiplexing device according to any one of claims 1-10, wherein the wavelength division multiplexing device further comprises a controller configured to When the wavelength division multiplexing device fails to connect, control the second demultiplexing unit to cross the seventh optical signal to the first demultiplexing unit; and control the second multiplexing unit to cross the eighth optical signal to the first demultiplexing unit; The optical signal is optically crossed to the first multiplexing unit.
The wavelength division multiplexing device according to claim 13, wherein the controller is further configured to, when the connection between the wavelength division multiplexing device and the first adjacent wavelength division multiplexing device is normal, control the The second demultiplexing unit crosses the seventh optical signal to the second multiplexing unit; and controls the second multiplexing unit to cross the eighth optical signal to the first adjoining Wavelength division multiplexing equipment.
An optical signal processing method, characterized in that the method is applied to a wavelength division multiplexing device, and the wavelength division multiplexing device includes a first wavelength division unit, a first wave combination unit, a second wave division unit, and a second wave combination unit wave unit; the method includes:

receiving a first optical signal from said first adjacent wavelength division multiplexing device;

The second optical signal to be sent to at least one first optical transmission unit OTU is separated from the first optical signal by the first demultiplexing unit, and the second optical signal is directly distributed to the at least one first optical transmission unit OTU. an OTU;

When the wavelength division multiplexing device is normally connected to the second adjacent wavelength division multiplexing device, control the first demultiplexing unit to convert the third optical signal in the first optical signal except the second optical signal sending the optical signal to the first multiplexing unit, and sending the third optical signal to the second adjacent wavelength division multiplexing device through the first multiplexing unit;

When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, the first wavelength division unit is controlled to convert the third optical signal in the first optical signal except the second optical signal sending the optical signal to the second demultiplexing unit;

controlling the second demultiplexing unit to separate a fourth optical signal to be sent to the at least one second OTU from the third optical signal, and transmitting the fourth optical signal through the second demultiplexing unit send to the at least one second OTU;

controlling the second demultiplexing unit to send a fifth optical signal in the third optical signal except the fourth optical signal to the second demultiplexing unit, and sending the fifth optical signal to the second demultiplexing unit through the second demultiplexing unit sending the fifth optical signal to the first adjacent wavelength division multiplexing device.
The method of claim 15, further comprising:

receiving an optical signal from at least one second OTU;

When the connection between the wavelength division multiplexing device and the second adjacent wavelength division multiplexing device fails, the first multiplexing unit is controlled to send the optical signal from the at least one second OTU to the second multiplexing unit. wave unit;

Sending the fifth optical signal to the first adjacent wavelength division multiplexing device through the second multiplexing unit specifically includes:

After the fifth optical signal and the optical signal from the at least one second OTU are multiplexed and processed by the second multiplexing unit, the fifth optical signal is sent to the first adjacent wavelength division multiplexing device.
The method of claim 16, further comprising:

receiving an optical signal from at least one first OTU;

After the fifth optical signal and the optical signal from the at least one second OTU are combined and processed, then sent to the first adjacent wavelength division multiplexing device, specifically including:

The fifth optical signal, the optical signal from the at least one first OTU, and the optical signal from the at least one second OTU are combined and processed by the second multiplexing unit, and then sent to the first Adjacent to WDM equipment.
The method according to any one of claims 15-17, wherein the controlling the first demultiplexing unit to send a third optical signal in the first optical signal except the second optical signal For the second demultiplexing unit, specifically include:

The first demultiplexing unit is controlled to perform optical crossover switching, and the third optical signal except the second optical signal in the first optical signal is optically crossed to an output port connected to the second demultiplexing unit.