CN109560891B - Method and device for realizing wavelength division multiplexing optical signal shunting - Google Patents
Method and device for realizing wavelength division multiplexing optical signal shunting Download PDFInfo
- Publication number
- CN109560891B CN109560891B CN201811368293.3A CN201811368293A CN109560891B CN 109560891 B CN109560891 B CN 109560891B CN 201811368293 A CN201811368293 A CN 201811368293A CN 109560891 B CN109560891 B CN 109560891B
- Authority
- CN
- China
- Prior art keywords
- signals
- aau
- wavelength division
- wavelength
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Signal Processing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a method and a device for realizing wavelength division multiplexing optical signal shunting, which relate to the technical field of optical transmission, and the method comprises the following steps: at a far-end node, the wavelength division multiplexing optical signals are subjected to wave division to obtain multiple paths of AAU signals with specific wavelengths to realize branching. And sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength, and the plurality of paths of regenerated AAU signals are sent to each AAU device. The invention does not need to analyze/pack the wavelength division multiplexing optical signal, has low time delay, and the AAU equipment can avoid adopting an optical module with adjustable wavelength to support the wavelength division multiplexing optical signal transmission.
Description
Technical Field
The invention relates to the technical field of optical transmission, in particular to a method and a device for realizing wavelength division multiplexing optical signal shunting.
Background
With the continuous development of internet applications, such as: big data, cloud computing, high definition video, etc., and the optical network evolution has stepped into the 5G era. The main characteristics of the 5G network to provide services include large bandwidth, low latency and massive connections, thereby placing higher requirements on the aspects of bandwidth, capacity, latency and networking flexibility of the bearer network, particularly the mobile forwarding network. The mobile fronthaul network is responsible for connecting an Active Antenna Unit (AAU) and a Distributed Unit (DU), and the carrying modes of the mobile fronthaul network mainly include three types: 1) directly connecting optical fibers; 2) Active switching; 3) passive wavelength division.
The optical fiber direct connection scheme directly connects the DU and the AAU through the optical fiber, the method consumes a large amount of optical fiber, the optical fiber planning and management are complex, but the cost of the optical module is low. The active switching scheme routes the signal through the backbone fiber to a remote active switching node, which is responsible for parsing/packing the signal and then distributing it to the AAUs. The scheme has the advantages of less consumed optical fiber and low cost of the optical module, but the remote node needs to be powered, and the analysis and the exchange of signals generate time delay. In the passive wavelength division scheme, a wavelength division multiplexer is used for firstly combining signals sent to each AAU, then the combined signals are transmitted to a remote passive wavelength division device through a trunk optical fiber, and after the combined signals are subjected to wavelength division by the passive wavelength division device, each wavelength signal is sent to the corresponding AAU. The scheme has the advantages of low time delay, less consumed optical fiber and no need of power supply for a far-end device. However, since each AAU corresponds to a different wavelength, an optical module with adjustable wavelength needs to be used in the AAU device. At present, the cost of the wavelength-tunable optical module is far higher than that of the fixed wavelength optical module, mainly because the design and production of the tunable laser are difficult.
The three bearing schemes are respectively provided with application scenes, so that the aim of optimizing the overall construction and maintenance cost is fulfilled. For example: under the condition of abundant optical fiber resources, an optical fiber direct connection scheme is mainly considered; active switching schemes may be employed in the absence of fiber resources, but in powered conditions, such as: and (4) slicing packet network. In the case of fiber resource shortage and no power supply condition, a passive wavelength division scheme is adopted, such as: wavelength division multiplexed passive optical networks. For the second application scenario, namely: in the case of fiber resource shortage but power supply condition, an active switching scheme is adopted, such as: on one hand, the slice packet network has high cost and is mainly embodied in a remote active switching device. On the other hand, the active switching device needs to parse/package the AAU signal, which increases the delay and power consumption.
Disclosure of Invention
In view of the defects in the prior art, an object of the present invention is to provide a method for implementing wavelength division multiplexing optical signal splitting, which does not need to analyze/package the wavelength division multiplexing optical signal and has low delay under the condition of lacking optical fiber resources but having power supply conditions, and an AAU device can avoid adopting a wavelength-tunable optical module to support wavelength division multiplexing optical signal splitting transmission.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a method of implementing wavelength division multiplexed optical signal splitting, the method comprising the steps of:
at a far-end node, carrying out wave division on the wavelength division multiplexing optical signal to obtain a plurality of paths of AAU signals with specific wavelengths to realize shunting;
and sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength, and the plurality of paths of regenerated AAU signals are sent to each AAU device.
On the basis of the technical scheme, the wavelength division multiplexing optical signal is subjected to wavelength division to obtain multiple paths of AAU signals with specific wavelengths, and the method specifically comprises the following steps:
the method comprises the steps that wavelength division multiplexing optical signals are subjected to wavelength division by using a wavelength division multiplexer, the wavelength division multiplexer adopts an Arrayed Waveguide Grating (AWG) supporting a first waveband channel and a second waveband channel, the wavelength division multiplexer comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first waveband channel and one second waveband channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
On the basis of the technical scheme, each path of AAU signal with specific wavelength is subjected to photoelectric conversion and electro-optical conversion in sequence to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, and the method specifically comprises the following steps:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and performing electro-optical conversion on each client side optical module to convert the electric signals into regenerative AAU signals within a preset wavelength range of a third wave band.
On the basis of the technical scheme, each client side optical module converts the electric signal into a regenerative AAU signal within the same third wave band preset wavelength range.
On the basis of the above technical solution, the third band is an O band.
On the basis of the technical proposal, the device comprises a shell,
the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
On the basis of the technical scheme, when each path of AAU signal with specific wavelength is subjected to photoelectric conversion and electro-optical conversion in sequence, the DWDM optical module and the client side optical module perform signal input and output through a mode switching module, and the working mode of the mode switching module comprises a transparent transmission mode and a signal shaping mode;
when the mode switching module is in a transparent transmission mode, a digital signal output port of the DWDM optical module is directly connected with a digital signal input port of a client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line;
when the mode switching module is in a signal shaping mode, in a downlink direction, a digital signal output port of the DWDM optical module is connected with a CDR chip input port, and a corresponding CDR chip output port is connected with a digital signal input port of the client side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
On the basis of the above technical solution, the working mode of the mode switching module further includes a data exchange mode, and the data exchange mode adopts M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
On the basis of the technical scheme, when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module;
when M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the M DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, a digital output port of the client side optical module is connected with an input port of the exchange chip to generate M paths of output digital signals and connect digital input ports of M DWDM optical modules;
when M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group.
Meanwhile, another object of the present invention is to provide an apparatus for implementing wavelength division multiplexing optical signal splitting, which does not need to parse/pack the wavelength division multiplexing optical signal under the condition that the optical fiber resource is lacking but the power supply condition is available, has low delay, and the AAU device can avoid using the wavelength-tunable optical module to support the wavelength division multiplexing optical signal splitting transmission.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
an apparatus for implementing wavelength division multiplexed optical signal splitting, comprising:
the wavelength division multiplexer is used for carrying out wavelength division on the wavelength division multiplexing optical signals to obtain multiple paths of AAU signals with specific wavelengths to realize shunting;
the conversion module is used for sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength; and sending the multiple regenerated AAU signals to the AAU equipment provided with the optical module with fixed wavelength.
On the basis of the above technical solution, the wavelength division multiplexer performs wavelength division on the wavelength division multiplexed optical signal to obtain multiple AAU signals with specific wavelengths, and the specific process is as follows:
the wavelength division multiplexer adopts a wave band array waveguide grating AWG supporting a first wave band channel and a second wave band channel, and comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first wave band channel and one second wave band channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
On the basis of the technical scheme, the conversion module comprises DWDM optical modules and client side optical modules, wherein the DWDM optical modules and the client side optical modules correspond to the number of the wavelength division ports; sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the specific process comprises the following steps:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and converting the electric signals into regeneration AAU signals positioned in a preset wavelength range of a third wave band by each client side optical module.
On the basis of the technical scheme, each client side optical module converts the electric signal into a regenerative AAU signal within the same third wave band preset wavelength range.
On the basis of the above technical solution, the third band is an O band.
On the basis of the technical proposal, the device comprises a shell,
the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
On the basis of the technical scheme, the conversion module further comprises a mode switching module, the DWDM optical module and the client side optical module perform signal input and output through the mode switching module, and the working mode of the mode switching module comprises a transparent transmission mode and a signal shaping mode;
when the mode switching module is in a transparent transmission mode, a digital signal output port of the DWDM optical module is directly connected with a digital signal input port of a client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line;
when the mode switching module is in a signal shaping mode, in a downlink direction, a digital signal output port of the DWDM optical module is connected with a CDR chip input port, and a corresponding CDR chip output port is connected with a digital signal input port of the client side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
On the basis of the above technical solution, the working mode of the mode switching module further includes a data exchange mode, and the data exchange mode adopts M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
On the basis of the technical proposal, the device comprises a shell,
when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module;
when M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the N DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, the digital output port of the client side optical module is connected with the input port of the exchange chip to generate N paths of output digital signals and connect the digital input ports of the N DWDM optical modules;
when M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group.
Compared with the prior art, the invention has the advantages that:
(1) the method for realizing wavelength division multiplexing optical signal shunting only relates to a Physical layer, namely PMD L eye (Physical media dependent sublayer), and the main operation steps comprise wavelength division multiplexing/demultiplexing, photoelectric conversion and electro-optical conversion, so that delay does not exist basically.
(2) In the method for realizing wavelength division multiplexing optical signal splitting of the present invention, under the condition of power supply, the multiple AAU signals with specific wavelengths obtained after splitting are sequentially subjected to photoelectric conversion and electro-optical conversion, so as to obtain multiple regenerated AAU signals within the preset wavelength range. As long as the wavelength of the regenerated AAU signal is within the preset range, the AAU signal can be received and transmitted by only setting the corresponding optical module with fixed wavelength on each AAU device, and the number of different wavelengths corresponding to the multiple regenerated AAU signals is less than the number of different wavelengths corresponding to the multiple AAU signals with specific wavelengths. It is preferable that the multiple regenerated AAU signals correspond to the same wavelength, so that all AAU devices can use the unified fixed-wavelength optical module. Compared with the passive wavelength division mode in the prior art, the wavelength-adjustable optical module is avoided, and the cost is greatly reduced.
Drawings
Fig. 1 is a block diagram of an apparatus for implementing wavelength division multiplexing optical signal splitting according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of wavelength planning for wavelength division multiplexed optical signal transmission in an embodiment of the present invention;
FIG. 3 is a schematic view of an embodiment of the present invention in a pass-through mode;
FIG. 4 is a diagram illustrating a signal shaping mode according to an embodiment of the present invention;
fig. 5 shows the following example 1: n and M: 1, schematic view;
FIG. 6 shows a mixed use of 1: n and M: schematic diagram of mode 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1:
referring to fig. 1, the present embodiment provides a method for splitting a wavelength division multiplexing optical signal, including the steps of:
at a far-end node, carrying out wave division on the wavelength division multiplexing optical signal to obtain a plurality of paths of AAU signals with specific wavelengths to realize shunting;
and sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength, and the plurality of paths of regenerated AAU signals are sent to each AAU device.
Specifically, in the downstream direction, the wavelength division multiplexing optical signal in the present embodiment is obtained by multiplexing the AAU signals having different wavelengths at the office.
In the embodiment, only the physical layer, namely the PMD L eye, is involved, and the main operation steps comprise wavelength division multiplexing/demultiplexing, photoelectric conversion and electro-optical conversion, so that no delay exists basically.
In addition, in the present embodiment, under the condition that power is supplied, the multiple AAU signals with specific wavelengths obtained after the division are sequentially subjected to photoelectric conversion and electro-optical conversion, so that multiple regenerated AAU signals within a preset wavelength range are obtained. As long as the wavelength of the regenerated AAU signal is within the preset range, the AAU signal can be received and transmitted by only setting the corresponding optical module with fixed wavelength on each AAU device, and the number of different wavelengths corresponding to the multiple regenerated AAU signals is less than the number of different wavelengths corresponding to the multiple AAU signals with specific wavelengths. It is preferable that the multiple regenerated AAU signals correspond to the same wavelength, so that all AAU devices can use the unified fixed-wavelength optical module. Compared with the passive wavelength division mode in the prior art, the wavelength-adjustable optical module is avoided, and the cost is greatly reduced.
Example 2:
as a preferred implementation mode, in addition to example 1, the wavelength division multiplexing optical signal is demultiplexed to obtain multiple AAU signals with specific wavelengths, and the specific steps are as follows:
the method comprises the steps that wavelength division multiplexing optical signals are subjected to wavelength division by using a wavelength division multiplexer, the wavelength division multiplexer adopts an Arrayed Waveguide Grating (AWG) supporting a first waveband channel and a second waveband channel, the wavelength division multiplexer comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first waveband channel and one second waveband channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
Further, each path of AAU signal with a specific wavelength is sequentially subjected to photoelectric conversion and electro-optical conversion to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, and the method specifically comprises the following steps:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and performing electro-optical conversion on each client side optical module to convert the electric signals into regenerative AAU signals within a preset wavelength range of a third wave band.
Further, the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
Further, each client side optical module converts the electrical signal into a regenerated AAU signal within the same preset wavelength range of the third wavelength band. Preferably, the third wavelength band is an O-band.
Specifically, the Wavelength Division multiplexer used in this embodiment adopts C + L band arrayed Waveguide gratings awg (arrayed Waveguide gratings), and the Wavelength interval is 100ghz, each Wavelength Division port corresponds to one C band channel and one L band channel, the C band channel is used to carry AN uplink AAU signal, the L band channel is used to carry a downlink AAU signal, or vice versa, the optical port of a DWDM (Dense Wavelength Division Multiplexing) optical module adopts a single fiber bidirectional (sfdm), the Wavelength of the uplink channel and the Wavelength of the downlink channel di of each DWDM optical module are consistent with the Wavelength of the connected Wavelength Division port of the Wavelength Division multiplexer, the uplink AAU signal and the downlink AAU signal of each channel are 25Ge CPRI (single Public Radio Interface) signals, and the client side optical module can adopt a low-cost cwdm (Dense Wavelength Division Multiplexing) Wavelength or a Wavelength ranging-36 WDM (Wavelength Division Multiplexing) n-36-Wavelength multiplex (Wavelength Division Multiplexing) module.
Referring to fig. 2, a wavelength planning for wavelength division multiplexing optical signal transmission is shown, wherein a C-band channel and a L-band channel are taken as a pair of channels to support uplink and downlink transmission of a wavelength division multiplexing optical signal, specifically, a 100GHz channel interval is taken as an example, each of the C-band and L bands includes 40 channels, and according to the order of wavelengths from low to high, the 40 channels of the C-band can be listed as C1, C2, …, and C40, and the 40 channels of the L band can be listed as L1, L2, …, and L40, so that the channel pair # 1 is { C1, L1 }, the channel pair # 2 is { C2, L2 }, and so on, the DWDM optical module # 1 is connected to the channel pair # 1, therefore, the uplink wavelength of the DWDM optical module # 1 is C1, the downlink wavelength is L1, or the uplink wavelength is L1, the downlink wavelength is C1, and the DWDM optical module is connected to a single-fiber optical port.
In the method of the embodiment, specifically, for the downlink direction, the AAU signals are multiplexed by using a wavelength division multiplexing method at the office end, where each AAU signal corresponds to a designated wavelength, at the remote node, the wavelength division multiplexing AAU signals are demultiplexed by using a wavelength division demultiplexing method, and after photoelectric conversion (O/E conversion), multiplexed and regenerated AAU signals are generated by using photoelectric conversion (E/O conversion), where the wavelength of the AAU signal corresponding to the first stage of photoelectric conversion is Ci or L i, which belongs to a C or L band, and subscript i indicates a channel number of a C or L band, the wavelength of the regenerated AAU signal corresponding to the second stage of photoelectric conversion is Oi, which belongs to an O band.
In the far-end node, after the AAU signals are subjected to photoelectric conversion (O/E conversion), multi-path regenerated AAU signals are generated through photoelectric conversion (E/O conversion), the AAU signal wavelength corresponding to the first-stage photoelectric conversion is Oi, the AAU signal wavelength corresponding to the second-stage photoelectric conversion is Ci or L i, the AAU signals belong to a C or L band, subscript i of the AAU signals represents a channel number of a C or L band, the regenerated AAU signals have different wavelengths and respectively correspond to port wavelengths of a wavelength division multiplexer, and the regenerated AAU signals are combined by the wavelength division multiplexer and finally sent to the central office.
Generally, the wavelength range of the O band is 1260nm to 1360nm, and in the present embodiment, the electrical signal is converted into the regenerated AAU signal within the preset wavelength range of the O band, for example, 1310nm is taken as a reference, which is acceptable in view of the fact that there is a deviation range of plus or minus 10 nm. That is to say, the regenerated AAU signals are all in the range of 1300 to 1320nm, so that the optical signals in the O band can be transmitted and received at low cost, and the purpose of reducing the cost is achieved.
Preferably, each client side optical module converts the electrical signal into a regenerated AAU signal within a preset wavelength range of the same O-band, such as 1300-1320 nm. Namely, the customer side optical modules adopt the same specification, the uplink wavelengths supported by the customer side optical modules are the same, the downlink wavelengths supported by the customer side optical modules are the same, and the uplink wavelengths are all in the O wave band, so that the cost of the optical modules between the AAU side and the DU is greatly reduced, and the deployment is convenient.
Example 3:
as a better implementation manner, on the basis of embodiment 2, when performing photoelectric conversion and electro-optical conversion on each path of AAU signal with a specific wavelength in sequence, the DWDM optical module and the client side optical module perform input and output of signals through a mode switching module, and the operating mode of the mode switching module includes a transparent transmission mode and a signal shaping mode.
Referring to fig. 3, when the mode switching module is in the transparent transmission mode, the digital signal output port of the DWDM optical module is directly connected to the digital signal input port of the client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line.
Referring to fig. 4, when the mode switching module is in the signal shaping mode, in the downlink direction, the digital signal output port of the DWDM optical module is connected to a CDR (Clock Data Recovery) chip input port, and the corresponding CDR chip output port is connected to the digital signal input port of the client-side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
The mode switching module is used for changing the connection mode between the DWDM optical module and the client side optical module according to actual requirements, and can adopt a transparent transmission mode under the condition of better link condition, wherein the signal shaping mode aims at long-distance transmission, has larger loss from an O L T (optical line terminal), has poor signal quality and needs a CDR chip for shaping and then transmitting.
Example 4:
referring to fig. 5, as a better implementation manner, on the basis of embodiment 3, the operating mode of the mode switching module further includes a data exchange mode, where the data exchange mode adopts M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
Specifically, when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module. The method comprises the following steps of 1: n mode, mainly because when DWDM optical module side data throughput is greater than single client side optical module data throughput, 1: the data exchange chip of N splits the aggregated data at DWDM optical module side into a plurality of client side optical module data.
When M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the M DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, the digital output port of the client side optical module is connected with the input port of the exchange chip, and generates M paths of output digital signals and is connected with the digital input ports of the M DWDM optical modules. Adopting N: mode 1, mainly because when DWDM optical module side data throughput is less than single client side optical module data throughput, N: the data exchange chip of 1 aggregates data of a plurality of DWDM optical modules into one client side optical module data.
When M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group. For M DWDM optical modules and N customer side optical modules, they may be divided into a plurality of groups, and the ratio of the number of DWDM optical modules and customer side optical modules in each group does not satisfy 1: a. thepThat is to satisfy Bq: 1, where p and q represent the number of groups in both cases, the sum of p and q being less than or equal to the smaller of M and N. For example, when M equals 5 and N equals 4, it can be divided into 1: 1. 1: 2 and 3: 1, these 3 groups.
Example 5:
the embodiment provides a device for realizing wavelength division multiplexing optical signal splitting, which comprises a wavelength division multiplexer and a conversion module.
The wavelength division multiplexer is used for carrying out wavelength division on the wavelength division multiplexing optical signals to obtain multiple paths of AAU signals with specific wavelengths to realize shunting;
the conversion module is used for sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength; and sending the multiple regenerated AAU signals to the AAU equipment provided with the optical module with fixed wavelength.
Example 6:
as a better implementation manner, on the basis of embodiment 5, the wavelength division multiplexer performs wavelength division on the wavelength division multiplexing optical signal to obtain multiple AAU signals with specific wavelengths, and the specific process is as follows:
the wavelength division multiplexer adopts a wave band array waveguide grating AWG supporting a first wave band channel and a second wave band channel, and comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first wave band channel and one second wave band channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
Furthermore, the conversion module comprises DWDM optical modules and client side optical modules, the number of the DWDM optical modules corresponds to the number of the wavelength division ports; sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the specific process comprises the following steps:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and converting the electric signals into regeneration AAU signals positioned in a preset wavelength range of a third wave band by each client side optical module.
Further, the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
Further, each client side optical module converts the electrical signal into a regenerated AAU signal within the same preset wavelength range of the third wavelength band. Preferably, the third wavelength band is an O-band.
Example 7:
as a better implementation manner, on the basis of embodiment 6, the conversion module further includes a mode switching module, where the DWDM optical module and the client side optical module perform signal input and output through the mode switching module, and the working mode of the mode switching module includes a transparent transmission mode and a signal shaping mode;
when the mode switching module is in a transparent transmission mode, a digital signal output port of the DWDM optical module is directly connected with a digital signal input port of a client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line;
when the mode switching module is in a signal shaping mode, in a downlink direction, a digital signal output port of the DWDM optical module is connected with a CDR chip input port, and a corresponding CDR chip output port is connected with a digital signal input port of the client side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
Example 8:
as shown in fig. 5, as a better implementation manner, on the basis of embodiment 7, the operation mode of the mode switching module further includes a data exchange mode, where the data exchange mode adopts M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
Specifically, when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module.
When M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the M DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, the digital output port of the client side optical module is connected with the input port of the exchange chip, and generates M paths of output digital signals and is connected with the digital input ports of the M DWDM optical modules.
When M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (18)
1. A method of implementing wavelength division multiplexed optical signal splitting, the method comprising the steps of:
at a far-end node, carrying out wave splitting on a wavelength division multiplexing optical signal to obtain multiple paths of AAU signals with specific wavelengths to realize branching, wherein the wavelength division multiplexing optical signal is obtained by carrying out wave combination on the AAU signals with different wavelengths at a local end;
and sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength, and the plurality of paths of regenerated AAU signals are sent to each AAU device.
2. The method for splitting wavelength division multiplexed optical signals according to claim 1, wherein the wavelength division multiplexed optical signals are split to obtain a plurality of AAU signals having specific wavelengths, comprising the steps of:
the method comprises the steps that wavelength division multiplexing optical signals are subjected to wavelength division by using a wavelength division multiplexer, the wavelength division multiplexer adopts an Arrayed Waveguide Grating (AWG) supporting a first waveband channel and a second waveband channel, the wavelength division multiplexer comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first waveband channel and one second waveband channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
3. The method for splitting wavelength division multiplexed optical signals according to claim 2, wherein the steps of sequentially performing photoelectric conversion and electro-optical conversion on each path of the AAU signal with a specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range comprise:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and performing electro-optical conversion on each client side optical module to convert the electric signals into regenerative AAU signals within a preset wavelength range of a third wave band.
4. A method of implementing wavelength division multiplexed optical signal splitting as recited in claim 3 wherein: each client side optical module converts the electric signal into a regenerative AAU signal within the preset wavelength range of the same third wave band.
5. The method of implementing wavelength division multiplexed optical signal splitting as recited in claim 3 or 4, wherein: the third band is an O band.
6. The method of implementing wavelength division multiplexed optical signal splitting as recited in claim 2 wherein:
the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
7. The method according to claim 3, wherein when performing optical-to-electrical conversion and electrical-to-optical conversion on each path of AAU signal with a specific wavelength, the DWDM optical module and the client-side optical module perform signal input and output through a mode switching module, and the mode switching module operates in a transparent transmission mode and a signal shaping mode;
when the mode switching module is in a transparent transmission mode, a digital signal output port of the DWDM optical module is directly connected with a digital signal input port of a client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line;
when the mode switching module is in a signal shaping mode, in a downlink direction, a digital signal output port of the DWDM optical module is connected with a CDR chip input port, and a corresponding CDR chip output port is connected with a digital signal input port of the client side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
8. The method for implementing wavelength division multiplexed optical signal splitting as claimed in claim 7, wherein the mode switching module further comprises a data switching mode, the data switching mode employs M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
9. The method of implementing wavelength division multiplexed optical signal splitting as recited in claim 8,
when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module;
when M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the M DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, a digital output port of the client side optical module is connected with an input port of the exchange chip to generate M paths of output digital signals and connect digital input ports of M DWDM optical modules;
when M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group.
10. An apparatus for implementing wavelength division multiplexed optical signal splitting, comprising:
the wavelength division multiplexer is used for carrying out wavelength division on wavelength division multiplexing optical signals to obtain multiple AAU signals with specific wavelengths to realize branching, wherein the wavelength division multiplexing optical signals are obtained by combining the AAU signals with different wavelengths at a local side;
the conversion module is used for sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with the specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the number of different wavelengths corresponding to the plurality of paths of regenerated AAU signals is less than the number of different wavelengths corresponding to the plurality of paths of AAU signals with the specific wavelength; and sending the multiple regenerated AAU signals to the AAU equipment provided with the optical module with fixed wavelength.
11. The apparatus for splitting wavelength division multiplexed optical signals according to claim 10, wherein the wavelength division multiplexer demultiplexes the wavelength division multiplexed optical signals to obtain a plurality of AAU signals with specific wavelengths by:
the wavelength division multiplexer adopts a wave band array waveguide grating AWG supporting a first wave band channel and a second wave band channel, and comprises a wave combination port and a plurality of wave division ports, and each wave division port corresponds to one first wave band channel and one second wave band channel;
the wavelength division multiplexing optical signal of the local side is received through the wave combining port, the wavelength division multiplexing optical signal is subjected to wave division, the multiple paths of AAU signals with the wavelength of the first wave band or the second wave band are obtained, and shunting is achieved through the multiple wave dividing ports.
12. The apparatus for implementing wavelength division multiplexed optical signal splitting as claimed in claim 11, wherein the conversion module includes DWDM optical modules and client side optical modules each corresponding to a number of the wavelength division ports; sequentially carrying out photoelectric conversion and electro-optical conversion on each path of AAU signal with specific wavelength to obtain a plurality of paths of regenerated AAU signals within a preset wavelength range, wherein the specific process comprises the following steps:
utilizing DWDM optical modules corresponding to the number of the wavelength division ports to receive AAU signals of the first waveband or the second waveband of the corresponding wavelength division ports, and carrying out photoelectric conversion to obtain corresponding electric signals, wherein the wavelength of an uplink channel and the wavelength of a downlink channel of each DWDM optical module are consistent with the wavelength of the channel of the corresponding wavelength division port;
and utilizing the client side optical modules corresponding to the DWDM optical modules in number to receive the electric signals in the corresponding DWDM optical modules, and converting the electric signals into regeneration AAU signals positioned in a preset wavelength range of a third wave band by each client side optical module.
13. The apparatus for implementing wavelength division multiplexed optical signal splitting as recited in claim 12, wherein: and each client side optical module converts the electric signals into regenerative AAU signals within the preset wavelength range of the same third wave band.
14. The apparatus for implementing wavelength division multiplexed optical signal splitting as claimed in claim 12 or 13, wherein: the third band is an O band.
15. The apparatus for implementing wavelength division multiplexed optical signal splitting as recited in claim 11 wherein:
the first waveband channel is a C waveband channel, and the second waveband channel is an L waveband channel, or
The first waveband channel is an L waveband channel, and the second waveband channel is a C waveband channel.
16. The apparatus for implementing wavelength division multiplexing optical signal splitting according to claim 12, wherein the conversion module further comprises a mode switching module, the DWDM optical module and the client side optical module perform signal input and output through the mode switching module, and the mode switching module operates in a transparent transmission mode and a signal shaping mode;
when the mode switching module is in a transparent transmission mode, a digital signal output port of the DWDM optical module is directly connected with a digital signal input port of a client side optical module through a high-speed data line; the digital signal input port of the DWDM optical module is directly connected with the digital signal output port of the client side optical module through a high-speed data line;
when the mode switching module is in a signal shaping mode, in a downlink direction, a digital signal output port of the DWDM optical module is connected with a CDR chip input port, and a corresponding CDR chip output port is connected with a digital signal input port of the client side optical module; and in the uplink direction, the digital signal output port of the client side optical module is connected with the input port of the CDR chip, and the corresponding output port of the CDR chip is connected with the digital signal input port of the DWDM optical module.
17. The apparatus for implementing wavelength division multiplexed optical signal splitting as claimed in claim 16, wherein the mode switching module further comprises a data switching mode, the data switching mode employs M: the N mode realizes the input and output of signals between the M DWDM optical modules and the N client side optical modules.
18. The apparatus for implementing wavelength division multiplexed optical signal splitting as recited in claim 17,
when M: n is 1: in the N time, in the downlink direction, the digital signal output port of the DWDM optical module is connected with the input port of the data exchange chip and generates N paths of output digital signals, and the output end of the exchange chip is connected with the digital input ports of the N customer-side optical modules; in the uplink direction, the digital output ports of the N client side optical modules are connected with the input port of the data exchange chip to generate a path of output digital signals and connected with the digital input port of the DWDM optical module;
when M: n ═ M: in the 1 hour, in the downlink direction, the digital signal output ports of the N DWDM optical modules are connected with the input port of the data exchange chip to generate a path of output digital signal, and the output end of the data exchange chip is connected with the digital input port of a client side optical module; in the uplink direction, the digital output port of the client side optical module is connected with the input port of the exchange chip to generate N paths of output digital signals and connect the digital input ports of the N DWDM optical modules;
when M and N do not all be 1, divide into groups M DWDM optical modules and N customer side optical module, make every group all satisfy a DWDM optical module and correspond a plurality of customer side optical modules, or a plurality of DWDM optical modules correspond a customer side optical module, according to 1: n or M: 1, signals are input and output to and from the DWDM optical modules and the client side optical modules in each group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368293.3A CN109560891B (en) | 2018-11-16 | 2018-11-16 | Method and device for realizing wavelength division multiplexing optical signal shunting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368293.3A CN109560891B (en) | 2018-11-16 | 2018-11-16 | Method and device for realizing wavelength division multiplexing optical signal shunting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109560891A CN109560891A (en) | 2019-04-02 |
| CN109560891B true CN109560891B (en) | 2020-07-21 |
Family
ID=65866571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811368293.3A Active CN109560891B (en) | 2018-11-16 | 2018-11-16 | Method and device for realizing wavelength division multiplexing optical signal shunting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109560891B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149149B (en) * | 2019-05-14 | 2024-04-30 | 北京小鸟科技股份有限公司 | Communication module for KVM switch device, KVM switch device and system |
| CN112118068B (en) * | 2019-06-20 | 2022-10-21 | 中国移动通信有限公司研究院 | State monitoring method, device, equipment and storage medium of forwarding network |
| CN112217593B (en) * | 2019-07-12 | 2023-01-13 | 中国移动通信有限公司研究院 | Management control method and equipment for new forwarding network |
| CN110365441B (en) * | 2019-07-31 | 2021-07-16 | 广州芯泰通信技术有限公司 | Optical signal transmitting and receiving method, device, equipment and wavelength division multiplexing system based on O wave band |
| CN110505008B (en) * | 2019-08-16 | 2020-09-22 | 杭州初灵信息技术股份有限公司 | Wavelength division multiplexing perception protection system and method applied to 5G fronthaul |
| CN111917507A (en) * | 2020-08-10 | 2020-11-10 | 上海欣诺通信技术股份有限公司 | Integrated wavelength division system and equipment |
| CN113660557A (en) * | 2021-07-13 | 2021-11-16 | 武汉兴思为光电科技有限公司 | Top-adjusting information monitoring device and method |
| CN115734103A (en) * | 2021-08-30 | 2023-03-03 | 华为技术有限公司 | Optical communication system, optical communication method, and optical signal switching apparatus |
| CN114024646A (en) * | 2021-10-27 | 2022-02-08 | 中航光电科技股份有限公司 | Satellite-borne wavelength division multiplexing system capable of being redundantly interconnected |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577842B (en) * | 2008-05-09 | 2013-08-07 | 华为技术有限公司 | Optical communication system, optical communication device and optical communication method |
| CN101557540B (en) * | 2009-04-30 | 2012-05-23 | 上海大学 | System for realizing wavelength reuse of self-injection wavelength division multiplexing passive optical network and method thereof |
| CN106612136A (en) * | 2015-10-20 | 2017-05-03 | 电信科学技术研究院 | Downlink data transmission method, device and system |
-
2018
- 2018-11-16 CN CN201811368293.3A patent/CN109560891B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109560891A (en) | 2019-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109560891B (en) | Method and device for realizing wavelength division multiplexing optical signal shunting | |
| US9509408B2 (en) | Optical data transmission system | |
| EP1887724B1 (en) | A wavelength division multiplexing passive optical network and its implement method | |
| US20100196011A1 (en) | Wavelength Division and Time Division Multiplex Mixing Passive Optical Network System, Terminal and Signal Transmission Method | |
| CN101197638B (en) | hybrid passive optical network system | |
| WO2015180508A1 (en) | Wavelength division pon system based open network architecture and signal transmission method | |
| CN112399283B (en) | Wavelength division multiplexing system, local side device and far-end device | |
| CN102695101A (en) | Passive optical network over wavelength division multiplexing | |
| US11689312B2 (en) | System and methods for coherent optical extension | |
| EP2920901B1 (en) | Remote node device, optical network unit and system and communication method thereof | |
| Rivas-Moscoso et al. | Cost benefit quantification of SDM network implementations based on spatially integrated network elements | |
| CN103348615A (en) | Method and device for fiber access physical layer unbundling using multiple uplink cards | |
| JP2010245752A (en) | Optical/radio transmitter | |
| WO2011006327A1 (en) | System and transmission method of passive optical network in which time division multiplexing coexists with wavelength division multiplexing | |
| US20140198812A1 (en) | Communications Network Transport Node, Optical Add-Drop Multiplexer and Method of Routing Communications Traffic | |
| JP3533370B2 (en) | Trunk node device and optical access network | |
| EP2136495A1 (en) | A scheduling equipment and a scheduling method in optical communication network | |
| CN113382316B (en) | Optical line terminal, optical network unit and optical communication system | |
| CN202004922U (en) | Passive optical network system on wavelength division multiplexing | |
| CN100488083C (en) | Service scheduling device in optical communication network and method thereof | |
| EP2168395B1 (en) | Maintaining correlated virtual data streams through a network | |
| US20050129403A1 (en) | Method and system for communicating optical traffic at a node | |
| Bock et al. | Scalable two-stage multi-FSR WDM-PON access network offering centralized dynamic bandwidth allocation | |
| Sambo et al. | Mode-group division multiplexing for provisioning in SDM networks | |
| Haiyi et al. | Considerations on transport networks technologies evolution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |