CN109428665B - Wavelength division multiplexing transmission device, reception device, relay device, and transmission system - Google Patents
Wavelength division multiplexing transmission device, reception device, relay device, and transmission system Download PDFInfo
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- CN109428665B CN109428665B CN201710720820.1A CN201710720820A CN109428665B CN 109428665 B CN109428665 B CN 109428665B CN 201710720820 A CN201710720820 A CN 201710720820A CN 109428665 B CN109428665 B CN 109428665B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
- H04L9/0855—Quantum cryptography involving additional nodes, e.g. quantum relays, repeaters, intermediate nodes or remote nodes
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Abstract
The invention discloses wavelength division multiplexing sending equipment, receiving equipment, relay equipment and a transmission system, and relates to the technical field of information safety. The wavelength division multiplexing transmission apparatus includes: the quantum key distribution unit is used for sending quantum wavelength optical signals to the combiner; the optical monitoring channel processing unit is used for sending optical monitoring channel wavelength optical signals to the combiner; the wavelength division multiplexing service processing unit is used for sending the optical signal with the classical wavelength to the combiner; the combiner is used for combining the quantum wavelength optical signal, the optical monitoring channel wavelength optical signal and the classical wavelength optical signal. The invention can provide value-added quantum encryption transmission service and quantum key distribution service for users under the condition of keeping the traditional networking mode unchanged, thereby achieving the effects of reducing cost and reducing optical fiber resources.
Description
Technical Field
The present invention relates to the field of information security technologies, and in particular, to a wavelength division multiplexing transmission device, a wavelength division multiplexing reception device, a wavelength division multiplexing relay device, and a wavelength division multiplexing transmission system.
Background
The encryption communication technology is an important technology in the field of information communication, and the classic encryption communication technology for the telecommunication network adopts a secret key generated by a cipher machine output or an auto-negotiation algorithm to symmetrically encrypt and decrypt communication contents so as to prevent eavesdropping in the communication process. However, with the development of new technologies such as high-performance parallel computing and quantum computing, the difficulty of breaking the classical key is greatly reduced, so that the classical encryption communication technology based on algorithm complexity faces huge technical risks.
The Quantum Key Distribution (QKD) technology is based on the quantum physical basic principle that quantum measurement is inaccurate, quantum is not cloned, and the like, and can realize safer key generation and distribution.
Disclosure of Invention
The inventor studies that encryption is only an accessory attribute of communication services and value-added services, and needs to be valuable in combination with traditional or classic communication services. Therefore, the QKD device and the classical communication device are integrated, and the transmission of the quantum channel and the classical channel is completed by using a common optical fiber resource. The WDM (Wavelength division multiplexing) transmission equipment is a main mode meeting the requirement of large-capacity information transmission, so the invention provides the WDM transmission equipment with the function of integrating quantum key distribution, which can provide value-added quantum encryption transmission service and quantum key distribution service for users under the condition of keeping the traditional networking mode unchanged, thereby achieving the effects of reducing cost and reducing optical fiber resources.
The invention solves the technical problem of how to provide value-added quantum encryption transmission service and quantum key distribution service for users under the condition of keeping the traditional networking mode unchanged, thereby achieving the effects of reducing cost and reducing optical fiber resources.
According to an aspect of an embodiment of the present invention, there is provided a wavelength division multiplexing transmission apparatus including: the quantum key distribution unit is used for sending a quantum key to the wavelength division multiplexing service processing unit, carrying out protocol negotiation by using a negotiation channel provided by the optical monitoring channel processing unit, carrying out signal synchronization by using a synchronization signal provided by the optical monitoring channel processing unit, and sending a quantum wavelength optical signal to the combiner; the optical monitoring channel processing unit is used for sending optical monitoring channel wavelength optical signals to the combiner and providing a negotiation channel and a synchronous signal for the quantum key distribution unit; the wavelength division multiplexing service processing unit is used for receiving the quantum key from the quantum key distribution unit, encrypting the service signal by using the received quantum key and then sending the optical signal with classical wavelength to the combiner; the combiner is used for combining the quantum wavelength optical signal, the optical monitoring channel wavelength optical signal and the classical wavelength optical signal and transmitting the combined optical signal.
In one embodiment, the optical supervisory channel processing unit supports single-fiber bidirectional communication; the combiner is configured to: the optical signal of the bidirectional optical monitoring channel wavelength is transmitted on different optical monitoring channel wavelengths in a first transmission optical fiber, the optical signal of the quantum wavelength is transmitted on the optical monitoring channel wavelength in a second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
In one embodiment, the separation of the combiner from the classical wavelength to the quantum wavelength is greater than a first threshold, and the separation of the combiner from the optical supervisory channel wavelength to the quantum wavelength is greater than a second threshold.
In one embodiment, the wavelength division multiplexing transmission apparatus further includes a control unit configured to: calculating the minimum transmitting power of the classical wavelength optical signal according to the attenuation condition of the transmission link and the minimum receiving power of the classical wavelength optical signal; calculating the maximum transmitting power of the classical wavelength optical signal according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation of a combiner from the classical wavelength to the quantum wavelength and the isolation of a splitter in the wavelength division multiplexing receiving equipment from the classical wavelength to the quantum wavelength; controlling the power of the wavelength division multiplexing service processing unit for sending the classical wavelength optical signal to be more than or equal to the minimum sending power of the classical wavelength optical signal and less than or equal to the maximum sending power of the classical wavelength optical signal; calculating the minimum sending power of the optical signal with the wavelength of the optical monitoring channel according to the attenuation condition of the transmission link and the minimum receiving power of the optical signal with the wavelength of the optical monitoring channel; calculating the maximum sending power of the optical signal of the optical monitoring channel wavelength according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation of a combiner from the optical monitoring channel wavelength to the quantum wavelength, and the isolation of a splitter in the wavelength division multiplexing receiving equipment from the optical monitoring channel wavelength to the quantum wavelength; and controlling the power of the optical monitoring channel wavelength optical signal transmitted by the optical monitoring channel processing unit to be greater than or equal to the minimum transmission power of the optical monitoring channel wavelength optical signal and less than or equal to the maximum transmission power of the optical monitoring channel wavelength optical signal.
In one embodiment, the control unit is further configured to: and controlling whether the wavelength division multiplexing service processing unit encrypts the service signal by using the received quantum key.
According to another aspect of the embodiments of the present invention, there is provided a wavelength division multiplexing receiving apparatus including: the wavelength splitter is used for receiving the received optical signals, splitting the combined optical signals into quantum wavelength optical signals, optical monitoring channel wavelength optical signals and classical wavelength optical signals, sending the quantum wavelength optical signals to the quantum key distribution unit, sending the optical monitoring channel wavelength optical signals to the optical monitoring channel processing unit, and sending the classical wavelength optical signals to the wavelength division multiplexing service processing unit; the quantum key distribution unit is used for receiving quantum wavelength optical signals from the wave separator, carrying out protocol negotiation by using a negotiation channel provided by the optical monitoring channel processing unit, carrying out signal synchronization by using a synchronization signal provided by the optical monitoring channel processing unit, and sending a quantum key to the wavelength division multiplexing service processing unit; the optical monitoring channel processing unit is used for receiving the optical signals with the light of the optical monitoring channel from the wave splitter and providing a negotiation channel and a synchronous signal for the quantum key distribution unit; and the wavelength division multiplexing service processing unit is used for receiving the classical wavelength optical signal from the wave splitter, receiving the quantum key from the quantum key distribution unit, and decrypting the classical wavelength optical signal by using the received quantum key to obtain a decrypted service signal.
In one embodiment, the optical supervisory channel processing unit supports single-fiber bidirectional communication; the wave separator is used for: the optical signal of the bidirectional optical monitoring channel wavelength is transmitted on different optical monitoring channel wavelengths in a first transmission optical fiber, the optical signal of the quantum wavelength is transmitted on the optical monitoring channel wavelength in a second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
In one embodiment, the isolation of the demultiplexer from the classical wavelength to the quantum wavelength is greater than a first threshold, and the isolation of the demultiplexer from the optical supervisory channel wavelength to the quantum wavelength is greater than a second threshold.
In one embodiment, the wavelength division multiplexing receiving apparatus further includes: and the control unit is used for controlling whether the wavelength division multiplexing service processing unit utilizes the acquired quantum key to decrypt.
According to still another aspect of the embodiments of the present invention, there is provided a wavelength division multiplexing relay apparatus including: the wavelength splitter is used for receiving the received optical signals, splitting the combined optical signals into quantum wavelength optical signals, optical monitoring channel wavelength optical signals and classical wavelength optical signals, sending the quantum wavelength optical signals to the quantum key relay unit, sending the optical monitoring channel wavelength optical signals to the optical monitoring channel relay unit, and sending the classical wavelength optical signals to the wavelength division multiplexing service relay unit; the quantum key relay unit is used for receiving the quantum wavelength optical signals from the wave separator, providing a relay function for the quantum wavelength optical signals and sending the quantum wavelength optical signals to the wave combiner; the optical monitoring channel relay unit is used for receiving the optical signals of the light of the optical monitoring channel from the wave splitter, providing a relay function for the optical signals of the optical monitoring channel and sending the optical signals of the optical monitoring channel to the wave combiner; the wavelength division multiplexing service relay unit is used for receiving the classical wavelength optical signal from the wave separator, providing a relay function for the classical wavelength optical signal and sending the classical wavelength optical signal to the wave combiner; the combiner is used for combining the quantum wavelength optical signal, the optical monitoring channel wavelength optical signal and the classical wavelength optical signal and transmitting the combined optical signal.
In one embodiment, the optical supervisory channel repeater unit supports single fiber bi-directional communication; the combiner and the splitter are configured to: the optical signal of the bidirectional optical monitoring channel wavelength is transmitted on different optical monitoring channel wavelengths in a first transmission optical fiber, the optical signal of the quantum wavelength is transmitted on the optical monitoring channel wavelength in a second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
In one embodiment, the degree of isolation of the combiner from the classical wavelength to the quantum wavelength is greater than a first threshold, the degree of isolation of the combiner from the optical supervisory channel wavelength to the quantum wavelength is greater than a second threshold, the degree of isolation of the splitter from the classical wavelength to the quantum wavelength is greater than the first threshold, and the degree of isolation of the splitter from the optical supervisory channel wavelength to the quantum wavelength is greater than the second threshold.
In one embodiment, the wavelength division multiplexing service relay unit is an optical amplifier unit for providing an optical signal amplification relay function for a classical wavelength optical signal.
In one embodiment, the wavelength division multiplexing service relay unit is an optical-electrical optical regeneration unit for providing an optical-electrical optical regeneration relay function for classical wavelength optical signals.
According to still another aspect of the embodiments of the present invention, there is provided a wavelength division multiplexing transmission system, which is characterized by including the aforementioned wavelength division multiplexing transmission apparatus, and the aforementioned wavelength division multiplexing reception apparatus.
In one embodiment, the wavelength division multiplexing transmission system further includes the aforementioned wavelength division multiplexing relay apparatus.
The invention can provide value-added quantum encryption transmission service and quantum key distribution service for users under the condition of keeping the traditional networking mode unchanged, thereby achieving the effects of reducing cost and reducing optical fiber resources.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram showing a wavelength division multiplexing transmission system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a wavelength division multiplexing transmission apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a wavelength division multiplexing receiving apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a wdm relay apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventors have discovered that quantum communication and quantum QKD devices do not currently allow for the needs of large-scale commercial deployment, are limited to QKD functionality and performance, and do not contemplate in depth the application of conversion to productivity in conjunction with practical communication networks. The WDM transmission equipment integrating the QKD function is beneficial to introducing the QKD function into a large-capacity WDM transmission system and realizing large-scale commercial use of a quantum secure communication technology. The QKD equipment and the classical communication equipment are fused, and the transmission of the quantum channel and the classical channel is completed by adopting the common optical fiber resource, so that the purposes of reducing the cost and improving the utilization rate of the optical fiber resource can be achieved. Based on the requirement, the WDM transmission equipment fusing the QKD function can provide value-added quantum encryption transmission service and quantum key distribution service for users under the condition that the traditional networking mode and service provision are not changed on time, and does not occupy additional optical fiber resources. The integrated equipment form is also beneficial to engineering implementation and operation maintenance.
First, a wavelength division multiplexing transmission system according to an embodiment of the present invention will be described with reference to fig. 1.
Fig. 1 is a schematic structural diagram showing a wavelength division multiplexing transmission system according to an embodiment of the present invention. As shown in fig. 1, a wavelength division multiplexing transmission system 10 in the present embodiment includes: a wavelength division multiplexing transmission device 102 and a wavelength division multiplexing reception device 104.
The WDM transmission device 102 is a WDM transmission device with a QKD function, operates at a service transmission end, can complete the transmission functions of a classical communication wavelength, a monitoring wavelength, and a QKD quantum wavelength, and provides a customer service access and a quantum encryption function.
The wavelength division multiplexing receiving device 104 is a WDM transmission device with a QKD function, and works in a quantum relay and optical amplifier station node to complete the optical relay of the classical communication wavelength, the termination of the monitoring wavelength, and the quantum relay function of the QKD quantum wavelength.
In a preferred embodiment, the wdm transmission system 10 further includes a wdm relay apparatus 106.
The WDM relay device 106 is a WDM transmission device with a QKD function, operates at a service receiving end, can complete the receiving functions of the classical communication wavelength, the monitoring wavelength, and the QKD quantum wavelength, and provides the functions of customer service output and quantum decryption.
In the embodiment, the QKD function is integrated inside the WDM transmission device, and the quantum wavelength, the classical wavelength, and the OSC wavelength are respectively used to carry the quantum QKD signal, the classical service signal, and the OSC signal, so that the quantum encrypted secure communication service can be provided without adding new optical fiber resources, and the high requirements of customers on security are met.
A wavelength division multiplexing transmission apparatus according to an embodiment of the present invention will be described with reference to fig. 2.
Fig. 2 is a schematic structural diagram of a wavelength division multiplexing transmission apparatus according to an embodiment of the present invention. As shown in fig. 2, the wavelength division multiplexing transmission device 102 in the present embodiment includes:
the quantum key distribution unit 2021 is configured to send a quantum key to the wavelength division multiplexing service processing unit 2025, perform protocol negotiation using a negotiation channel provided by the optical supervisory channel processing unit 2023, perform signal synchronization using a synchronization signal provided by the optical supervisory channel processing unit 2023, and send a quantum wavelength optical signal to the multiplexer 2027.
The quantum key distribution unit is used for providing a QKD sending function and providing a quantum key for a board card which needs to provide quantum encryption and decryption services in the wavelength division multiplexing service processing unit. In addition, the quantum key distribution unit can also provide keys to other quantum encryption communication equipment through an external interface, and the standardized quantum key service interface protocol or the proprietary protocol is followed.
The optical supervisory channel processing unit 2023 is configured to send the optical supervisory channel wavelength optical signal to the combiner 2027, and provide a negotiation channel and a synchronization signal for the quantum key distribution unit 2021.
The optical supervisory channel processing unit is used for providing OSC communication services of the conventional WDM system, for example, providing network management communication signaling channels, station phones, etc. between nodes of the WDM system. On the other hand, the supervisory channel processing unit may provide the QKD unit with a negotiation channel and synchronization signals. During the operation of the QKD unit, a two-way classical communication channel is required for performing the related protocol negotiation, and the bandwidth requirement is about 100M. In the prior art, an end-to-end communication circuit needs to be prepared for negotiation of both QKD parties, so that a special optical fiber needs to be prepared for synchronization of both QKD parties through a synchronization pulse. In this embodiment, the OSC may provide a classical communication channel up to 1G, in which a dedicated communication channel is divided by a VLAN or the like for use by the QKD unit. In addition, the QKD unit needs to synchronize during operation, and the OSC unit can provide a synchronization signal output service to the QKD unit through a signal synchronization mechanism or by introducing technologies such as synchronous ethernet and IEEE 1588, so that the QKD unit directly uses the synchronization signal provided by the OSC to achieve both-side synchronization.
The wavelength division multiplexing service processing unit 2025 is configured to receive the quantum key from the quantum key distribution unit 2021, encrypt the service signal with the received quantum key, and send the classical wavelength optical signal to the combiner 2027.
The wavelength division multiplexing service processing unit is used for providing service processing and WDM transmission functions of the traditional WDM equipment, such as functions including wave combination, amplification, power control and the like of classical wavelengths, and acquiring a quantum key from the QKD when quantum encryption and decryption services need to be provided. If a plurality of WDM service processing units exist, the plurality of WDM service processing units transmit signals of a plurality of wavelengths to the combiner.
The combiner 2027 is configured to combine the quantum wavelength optical signal, the optical supervisory channel wavelength optical signal, and the classical wavelength optical signal, and transmit the combined optical signal.
The combiner is used for combining the quantum wavelength, the OSC wavelength and the classical wavelength. The key point of the wave combination technology of the three wavelengths is to select proper wavelength and power, and technical parameters such as isolation of a wave combiner, and the like, so that the interference of classical wavelength and OSC wavelength on quantum wavelength is prevented. In terms of selecting the wavelength, the frequency interval between the quantum wavelength and the OSC wavelength can be set to be 50-100 nm, and the frequency interval between the quantum wavelength and the classical wavelength can be set to be 20-30 nm, so that the interference of the classical wavelength and the OSC wavelength on the quantum wavelength can be reduced.
On the other hand, a high-isolation wave combiner can be selected, and the interference of classical signals to quantum signals is reduced. The isolation of the combiner from classical to quantum wavelengths should be greater than a first threshold, e.g. greater than 20 db. Preferably, the separation of the combiner from classical wavelength to quantum wavelength is greater than 60 db. The isolation of the combiner from the optical supervisory channel wavelength to the quantum wavelength should be greater than a second threshold, which may be the same or different from the first threshold, e.g., greater than 20 db. The interference of the classical wavelength optical signal and the optical monitoring channel wavelength optical signal to the quantum signal can be reduced by adopting the wave combiner with more than high isolation. It will be appreciated by those skilled in the art that the high isolation combiner may be comprised of a single device or may be comprised of multiple devices.
In a preferred embodiment, the optical supervisory channel processing unit 2024 supports single fiber bi-directional communication. The combiner 2027 is configured to: the optical signals of the bidirectional optical monitoring channel wavelength are transmitted on different optical monitoring channel wavelengths in the first transmission optical fiber, the optical signals of the quantum wavelength are transmitted on the optical monitoring channel wavelength in the second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
The above embodiments support unidirectional QDK to provide quantum encryption and decryption functions for bidirectional WDM traffic. The QDK technology is one-way, namely one end sends and the other end receives, QKD quantum key negotiation of both parties is realized through an interface, the two communication parties can synchronously obtain the same quantum key, and symmetric signal encryption and decryption are realized. Meanwhile, the embodiment supports the OSC by a single-fiber bidirectional communication method, and at this time, the supporting quantum channel is the same as the OSC channel, and transmission fibers in one direction are used respectively.
For example, a pair of optical fibers (a → Z and Z → a, respectively) is used for both communication parties (a and Z), and a classical WDM communication uses a classical WDM wavelength region in both optical fibers. If the OSC supports single fiber two-way communication, two-way OSC communication between A and Z can be achieved at two different wavelengths in one optical fiber (e.g., the A → Z direction), where neither OSC wavelength in the Z → A direction fiber is used, where one of the OSC wavelengths can be used as the wavelength for QKD communication between the two. By adopting the mode, the wavelength selection can be optimized, the interference to the quantum wavelength is reduced, and the system performance is further improved.
In a preferred embodiment, the wdm transmission apparatus 102 further includes a control unit 2029, which is used to perform the apparatus management control function and provide an open interface for the upper layer network management and control unit to support the access network management system and control unit, accept the centralized management or control of the upper layer network management or control unit, and provide the required information upwards as required. For the quantum encryption service, the control unit can also be responsible for configuring the encryption working state of the quantum encryption service and managing a key pool.
In a preferred embodiment, the control unit 2029 is configured to:
calculating the minimum transmitting power of the classical wavelength optical signal according to the attenuation condition of the transmission link and the minimum receiving power of the classical wavelength optical signal;
calculating the maximum transmitting power of the classical wavelength optical signal according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation of the combiner 2027 from the classical wavelength to the quantum wavelength, and the isolation of the splitter in the wavelength division multiplexing receiving equipment from the classical wavelength to the quantum wavelength;
the power of controlling the wavelength division multiplexing service processing unit 2025 to transmit the classical wavelength optical signal is greater than or equal to the minimum transmission power of the classical wavelength optical signal and less than or equal to the maximum transmission power of the classical wavelength optical signal;
calculating the minimum sending power of the optical signal with the wavelength of the optical monitoring channel according to the attenuation condition of the transmission link and the minimum receiving power of the optical signal with the wavelength of the optical monitoring channel;
calculating the maximum transmission power of the optical signal of the wavelength of the optical monitoring channel according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation of a combiner 2027 from the wavelength of the optical monitoring channel to the quantum wavelength, and the isolation of a splitter in the wavelength division multiplexing receiving equipment from the wavelength of the optical monitoring channel to the quantum wavelength;
the power of the optical supervisory channel processing unit 2023 for transmitting the optical supervisory channel wavelength optical signal is controlled to be equal to or higher than the minimum transmission power of the optical supervisory channel wavelength optical signal and equal to or lower than the maximum transmission power of the optical supervisory channel wavelength optical signal.
In the above embodiment, by monitoring and controlling the classical wavelength optical signal and the optical monitoring channel wavelength optical signal in real time, the powers of the classical wavelength optical signal and the optical monitoring channel wavelength optical signal can be reduced as much as possible under the condition that the power budget of the transmission link is satisfied, so as to reduce the interference to the quantum wavelength optical signal.
In a preferred embodiment, the control unit 2029 is further configured to:
controls whether the wavelength division multiplexing traffic processing unit 2025 encrypts the traffic signal with the received quantum key.
The control unit can complete local configuration to provide quantum encryption and decryption service by manual configuration of the network management system or introduction of a related automatic configuration protocol.
Different from the way that the external interface adopted between the quantum encryption communication equipment and the QKD equipment in the existing scheme acquires the key, the communication between the QKD and the encryption and decryption board card in the WDM equipment integrating the QKD function in the embodiment is changed into board card internal communication, the quantum key required by quantum encryption and decryption of the WDM equipment is acquired through equipment internal communication, the characteristics of high reliability and strong privacy are realized through board card back plate communication, the risk of acquiring the key by the external interface is avoided, and the security and the reliability are favorably improved.
On the other hand, the embodiment supports quantum QKD wavelength, OSC wavelength and classical communication wavelength service common-fiber transmission, and is beneficial to saving precious optical fiber resources. The OSC wavelength provides a required synchronization and negotiation channel for the QKD function, so that a special synchronization and negotiation channel is prevented from being prepared for the QKD, the occupation of optical fiber resources is further reduced, the special construction of a QKD synchronization and negotiation network is avoided, the cost is reduced, and the feasibility of the existing network deployment is improved.
A wavelength division multiplexing receiving apparatus according to an embodiment of the present invention will be described with reference to fig. 3.
Fig. 3 is a schematic structural diagram of a wavelength division multiplexing receiving apparatus according to an embodiment of the present invention. As shown in fig. 3, the wavelength division multiplexing receiving device 104 in the present embodiment includes:
the demultiplexer 3041 is configured to receive the received optical signal, demultiplex the combined optical signal into a quantum wavelength optical signal, an optical supervisory channel wavelength optical signal, and a classical wavelength optical signal, send the quantum wavelength optical signal to the quantum key distribution unit 3043, send the optical supervisory channel wavelength optical signal to the optical supervisory channel processing unit 3045, and send the classical wavelength optical signal to the wavelength division multiplexing service processing unit 3047.
The wave separator is used for separating the quantum wavelength, the OSC wavelength and the classical wavelength. The wave splitter distributes the classical optical signal wavelength, the OSC optical wavelength and the quantum optical wavelength to the corresponding signal processing units through the corresponding ports respectively. There are many ways to implement optical splitters, such as dielectric films, AWGs, PLC, WSS, etc., and no special requirements are made in the present invention.
Optionally, a high-isolation wave splitter can be selected to reduce the interference of the classical signal to the quantum signal. The isolation of the splitter from classical to quantum wavelengths should be greater than a first threshold, e.g. greater than 20 db. Preferably, the isolation of the splitter from classical wavelengths to quantum wavelengths is greater than 60 decibels. The isolation of the demultiplexer from the optical supervisory channel wavelength to the quantum wavelength should be greater than a second threshold, which may be the same or different from the first threshold, e.g., greater than 20 db. The interference of the classical wavelength optical signal and the optical monitoring channel wavelength optical signal to the quantum signal can be reduced by adopting the wave separator with the isolation degree higher than the high isolation degree.
It will be appreciated by those skilled in the art that the high isolation demultiplexer may be comprised of a single device or may be comprised of multiple devices.
The quantum key distribution unit 3043 is configured to receive quantum wavelength optical signals from the demultiplexer 3041, perform protocol negotiation using a negotiation channel provided by the optical supervisory channel processing unit 3045, perform signal synchronization using synchronization signals provided by the optical supervisory channel processing unit 3045, and send a quantum key to the wavelength division multiplexing service processing unit 3047.
The quantum key distribution unit is used for providing a QKD receiving function and providing a quantum key for a board card which needs to provide quantum encryption and decryption services in the OTM. For example, in the case of a symmetric encryption scheme, the encryption and decryption keys are the same.
The optical supervisory channel processing unit 3045 is configured to receive the optical supervisory channel wavelength optical signal from the demultiplexer 3041, and provide a negotiation channel and a synchronization signal for the quantum key distribution unit 3043.
The optical supervisory channel processing unit serves to provide OSC communication services of the conventional WDM system, and provides a negotiation path and synchronization signals for the QKD unit.
The wavelength division multiplexing service processing unit 3047 is configured to receive the classical wavelength optical signal from the demultiplexer 3041, receive the quantum key from the quantum key distribution unit 3043, and decrypt the classical wavelength optical signal with the received quantum key to obtain a decrypted service signal.
The wavelength division multiplexing service processing unit is used for providing service processing and WDM transmission functions of the traditional WDM equipment, such as functions of wavelength division, amplification, power control and the like of classical wavelengths, and acquiring quantum keys from the QKD unit when quantum encryption and decryption services need to be provided.
In a preferred embodiment, the optical supervisory channel processing unit supports single-fiber bidirectional communication;
the demultiplexer 3041 is configured to: the optical signals of the bidirectional optical monitoring channel wavelength are transmitted on different optical monitoring channel wavelengths in the first transmission optical fiber, the optical signals of the quantum wavelength are transmitted on the optical monitoring channel wavelength in the second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
In a preferred embodiment, the wdm-receiving device 104 further includes a control unit 3049 configured to perform a device management control function and provide an open interface for the upper layer network management and control unit. For example, the control unit may monitor the operating state of each unit, and for the quantum encryption service, the control unit may also be responsible for configuring the encryption operating state of the quantum encryption service, that is, whether to decrypt with the acquired quantum key, and manage the key pool.
Different from the way that the external interface adopted between the quantum encryption communication equipment and the QKD equipment in the existing scheme acquires the key, the communication between the QKD and the encryption and decryption board card in the WDM equipment integrating the QKD function in the embodiment is changed into board card internal communication, the quantum key required by quantum encryption and decryption of the WDM equipment is acquired through equipment internal communication, the characteristics of high reliability and strong privacy are realized through board card back plate communication, the risk of acquiring the key by the external interface is avoided, and the security and the reliability are favorably improved.
On the other hand, the embodiment supports quantum QKD wavelength, OSC wavelength and classical communication wavelength service common-fiber transmission, and is beneficial to saving precious optical fiber resources. The OSC wavelength provides a required synchronization and negotiation channel for the QKD function, so that a special synchronization and negotiation channel is prevented from being prepared for the QKD, the occupation of optical fiber resources is further reduced, the special construction of a QKD synchronization and negotiation network is avoided, the cost is reduced, and the feasibility of the existing network deployment is improved.
A wavelength division multiplexing relay apparatus according to an embodiment of the present invention will be described with reference to fig. 4.
Fig. 4 is a schematic structural diagram of a wdm relay apparatus according to an embodiment of the present invention. As shown in fig. 4, the wavelength division multiplexing relay device 106 in the present embodiment includes:
the demultiplexer 4061 is configured to receive the received optical signal, demultiplex the combined optical signal into a quantum wavelength optical signal, an optical monitoring channel wavelength optical signal, and a classical wavelength optical signal, send the quantum wavelength optical signal to the quantum key relay unit 4062, send the optical monitoring channel wavelength optical signal to the optical monitoring channel relay unit 4063, and send the classical wavelength optical signal to the wavelength division multiplexing service relay unit 4064.
The wave separator is used for separating the quantum wavelength, the OSC wavelength and the classical wavelength.
Optionally, a high-isolation wave splitter can be selected to reduce the interference of the classical signal to the quantum signal. The isolation of the splitter from classical to quantum wavelengths should be greater than a first threshold, e.g. greater than 20 db. Preferably, the isolation of the splitter from classical wavelengths to quantum wavelengths is greater than 60 decibels. The isolation of the demultiplexer from the optical supervisory channel wavelength to the quantum wavelength should be greater than a second threshold, which may be the same or different from the first threshold, e.g., greater than 20 db. The interference of the classical wavelength optical signal and the optical monitoring channel wavelength optical signal to the quantum signal can be reduced by adopting the wave separator with the isolation degree higher than the high isolation degree.
It will be appreciated by those skilled in the art that the high isolation demultiplexer may be comprised of a single device or may be comprised of multiple devices.
The quantum key distribution relay unit 4062 is configured to receive the quantum wavelength optical signal from the demultiplexer 4061, provide a relay function for the quantum wavelength optical signal, and transmit the quantum wavelength optical signal to the combiner 4065.
Wherein the QKD unit functions to provide QKD relay functionality.
The optical monitoring channel relay unit 4063 is configured to receive the optical signal of the optical monitoring channel wavelength from the demultiplexer 4061, provide a relay function for the optical monitoring channel optical signal, and send the optical monitoring channel optical signal to the combiner 4065.
Among other things, the optical supervisory channel relay unit functions to provide OSC communication services of the conventional WDM system and provides the QKD unit with a negotiation channel and synchronization signals.
The wavelength division multiplexing service relay unit 4064 is configured to receive the classical wavelength optical signal from the demultiplexer 4061, provide a relay function for the classical wavelength optical signal, and send the classical wavelength optical signal to the combiner 4065.
Optionally, the wavelength division multiplexing service relay unit 4064 is an optical amplifier unit, and is configured to provide an optical signal amplification relay function for a classical wavelength optical signal.
The optical amplifier unit provides an optical signal amplification function for classical wavelengths, is suitable for a relay node of a classical WDM channel without optical-electrical regeneration, and has the classical wavelength performance enough to support the situation of all-optical transmission.
Optionally, the wavelength division multiplexing service relay unit 4064 is an optical-electrical optical regeneration unit, and is configured to provide an optical-electrical optical regeneration relay function for a classical wavelength optical signal.
The optical amplifier unit provides an electro-optical regeneration relay function for classical wavelengths, is suitable for relay nodes of classical WDM channels needing electro-optical regeneration, and is not enough for supporting all-optical transmission.
The combiner 4065 is configured to combine the quantum wavelength optical signal, the optical supervisory channel wavelength optical signal, and the classical wavelength optical signal, and transmit the combined optical signal.
The combiner is used for combining the quantum wavelength, the OSC wavelength and the classical wavelength.
Optionally, a high-isolation combiner can be selected to reduce the interference of the classical signal to the quantum signal. The isolation of the combiner from classical to quantum wavelengths should be greater than a first threshold, e.g. greater than 20 db. Preferably, the separation of the combiner from classical wavelength to quantum wavelength is greater than 60 db. The isolation of the combiner from the optical supervisory channel wavelength to the quantum wavelength should be greater than a second threshold, which may be the same or different from the first threshold, e.g., greater than 20 db. The interference of the classical wavelength optical signal and the optical monitoring channel wavelength optical signal to the quantum signal can be reduced by adopting the wave combiner with more than high isolation.
It will be appreciated by those skilled in the art that the high isolation combiner may be comprised of a single device or may be comprised of multiple devices.
In a preferred embodiment, the optical supervisory channel repeater unit supports single fiber bi-directional communication. The combiner and the splitter are configured to: the optical signals of the bidirectional optical monitoring channel wavelength are transmitted on different optical monitoring channel wavelengths in the first transmission optical fiber, the optical signals of the quantum wavelength are transmitted on the optical monitoring channel wavelength in the second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
Optionally, the wdm relay apparatus 106 may further include a control unit 4066, configured to complete an apparatus management control function, and provide an open interface for an upper layer network management and control unit.
Different from the way that the external interface adopted between the quantum encryption communication equipment and the QKD equipment in the existing scheme acquires the key, the communication between the QKD and the encryption and decryption board card in the WDM equipment integrating the QKD function in the embodiment is changed into board card internal communication, the quantum key required by quantum encryption and decryption of the WDM equipment is acquired through equipment internal communication, the characteristics of high reliability and strong privacy are realized through board card back plate communication, the risk of acquiring the key by the external interface is avoided, and the security and the reliability are favorably improved.
On the other hand, the embodiment supports quantum QKD wavelength, OSC wavelength and classical communication wavelength service common-fiber transmission, and is beneficial to saving precious optical fiber resources. The OSC wavelength provides a required synchronization and negotiation channel for the QKD function, so that a special synchronization and negotiation channel is prevented from being prepared for the QKD, the occupation of optical fiber resources is further reduced, the special construction of a QKD synchronization and negotiation network is avoided, the cost is reduced, and the feasibility of the existing network deployment is improved.
The work flow among the wavelength division multiplexing transmitting equipment 102, the wavelength division multiplexing receiving equipment 104 and the wavelength division multiplexing relay equipment 106 in the invention is as follows:
under the control of the control unit 2029, the quantum key distribution unit 2021 transmits the quantum key to the wavelength division multiplexing service processing unit 2025, and performs signal synchronization and channel negotiation through the optical supervisory channel wavelength. The quantum key distribution unit 2021 sends a quantum wavelength optical signal to the combiner 2027, the optical supervisory channel processing unit 2023 sends an optical supervisory channel wavelength optical signal to the combiner 2027, and the wavelength division multiplexing service processing unit 2025 sends a classical wavelength optical signal to the combiner 2027. The combiner 2027 combines the optical signals, and transmits the combined optical signals to the demultiplexer 4061 via an optical fiber.
Under the control of the control unit 4066, the demultiplexer 4061 demultiplexes the combined optical signal, sends the quantum-wavelength optical signal to the quantum key distribution relay unit 4062, sends the optical monitoring channel-wavelength optical signal to the optical monitoring channel relay unit 4063, and sends the classical-wavelength optical signal to the wavelength division multiplexing service relay unit 4064. After the quantum key distribution relay unit 4062, the optical monitoring channel relay unit 4063, and the wavelength division multiplexing service relay unit 4064 respectively provide relay services, the quantum key distribution relay unit 4062 sends a quantum wavelength optical signal to the combiner 4065, the optical monitoring channel relay unit 4063 sends an optical monitoring channel wavelength optical signal to the combiner 4065, and the wavelength division multiplexing service relay unit 4064 sends a classical wavelength optical signal to the combiner 4065. The combiner 4065 combines the waves, and transmits the combined optical signal to the demultiplexer 3041 via an optical fiber.
The demultiplexer 4061 demultiplexes the combined optical signal, and sends the quantum wavelength optical signal to the quantum key distribution unit 3043, the optical supervisory channel wavelength optical signal to the optical supervisory channel processing unit 3045, and the classical wavelength optical signal to the wavelength division multiplexing service processing unit 3047. Under the control of the control unit 3049, the quantum key distribution unit 4062 sends the quantum key to the wavelength division multiplexing service processing unit 4064, and performs signal synchronization and channel negotiation through the optical supervisory channel wavelength.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A wavelength division multiplexing transmission apparatus, comprising:
the quantum key distribution unit is used for sending a quantum key to the wavelength division multiplexing service processing unit, carrying out protocol negotiation by using a negotiation channel provided by the optical monitoring channel processing unit, carrying out signal synchronization by using a synchronization signal provided by the optical monitoring channel processing unit, and sending a quantum wavelength optical signal to the combiner;
the optical monitoring channel processing unit supports single-fiber bidirectional communication, is used for sending optical monitoring channel wavelength optical signals to the combiner, and provides a negotiation channel and a synchronous signal for the quantum key distribution unit;
the wavelength division multiplexing service processing unit is used for receiving the quantum key from the quantum key distribution unit, encrypting the service signal by using the received quantum key and then sending the optical signal with classical wavelength to the combiner;
the combiner is used for combining the quantum wavelength optical signal, the optical monitoring channel wavelength optical signal and the classical wavelength optical signal and transmitting the combined optical signal, wherein the two-way optical monitoring channel wavelength optical signal is transmitted on different optical monitoring channel wavelengths in a first transmission optical fiber, the quantum wavelength optical signal is transmitted on the optical monitoring channel wavelength in a second transmission optical fiber, and the first transmission optical fiber and the second transmission optical fiber are transmission optical fibers paired between two communication parties;
and the control unit is used for controlling whether the wavelength division multiplexing service processing unit encrypts the service signal by using the received quantum key.
2. The wdm transmission apparatus of claim 1, wherein the wavelength division multiplexing combiner has a separation from classical wavelengths to quantum wavelengths greater than a first threshold, and wherein the wavelength division multiplexing combiner has a separation from optical supervisory channel wavelengths to quantum wavelengths greater than a second threshold.
3. The wavelength division multiplexing transmission device according to claim 1, wherein the wavelength division multiplexing transmission device further comprises a control unit operable to:
calculating the minimum transmitting power of the classical wavelength optical signal according to the attenuation condition of the transmission link and the minimum receiving power of the classical wavelength optical signal;
calculating the maximum transmitting power of the classical wavelength optical signal according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation degree of the wave combiner from the classical wavelength to the quantum wavelength and the isolation degree of the wave splitter in the wavelength division multiplexing receiving equipment from the classical wavelength to the quantum wavelength;
controlling the power of the wavelength division multiplexing service processing unit for sending the classical wavelength optical signal to be more than or equal to the minimum sending power of the classical wavelength optical signal and less than or equal to the maximum sending power of the classical wavelength optical signal;
calculating the minimum sending power of the optical signal with the wavelength of the optical monitoring channel according to the attenuation condition of the transmission link and the minimum receiving power of the optical signal with the wavelength of the optical monitoring channel;
calculating the maximum sending power of the optical signal of the optical monitoring channel wavelength according to the maximum crosstalk accepted by a quantum key distribution unit in the wavelength division multiplexing receiving equipment, the isolation degree of the wave combiner from the optical monitoring channel wavelength to the quantum wavelength, and the isolation degree of the wave splitter in the wavelength division multiplexing receiving equipment from the optical monitoring channel wavelength to the quantum wavelength;
and controlling the power of the optical monitoring channel wavelength optical signal transmitted by the optical monitoring channel processing unit to be greater than or equal to the minimum transmission power of the optical monitoring channel wavelength optical signal and less than or equal to the maximum transmission power of the optical monitoring channel wavelength optical signal.
4. A wavelength division multiplexing receiving apparatus, comprising:
a demultiplexer for receiving the received optical signal, demultiplexing the combined optical signal into a quantum wavelength optical signal, an optical supervisory channel wavelength optical signal and a classical wavelength optical signal, sending the quantum wavelength optical signal to a quantum key distribution unit, sending the optical supervisory channel wavelength optical signal to an optical supervisory channel processing unit, and sending the classical wavelength optical signal to a wavelength division multiplexing service processing unit, wherein the two-way optical supervisory channel wavelength optical signal is transmitted at different optical supervisory channel wavelengths in a first transmission fiber, the quantum wavelength optical signal is transmitted at an optical supervisory channel wavelength in a second transmission fiber, and the first transmission fiber and the second transmission fiber are paired transmission fibers between two communication parties;
the quantum key distribution unit is used for receiving quantum wavelength optical signals from the wave separator, carrying out protocol negotiation by using a negotiation channel provided by the optical monitoring channel processing unit, carrying out signal synchronization by using a synchronization signal provided by the optical monitoring channel processing unit, and sending a quantum key to the wavelength division multiplexing service processing unit;
the optical monitoring channel processing unit supports single-fiber bidirectional communication, is used for receiving the optical signals with the light of the optical monitoring channel from the wave splitter, and provides a negotiation channel and a synchronous signal for the quantum key distribution unit;
the wavelength division multiplexing service processing unit is used for receiving the classical wavelength optical signal from the wave splitter, receiving the quantum key from the quantum key distribution unit, and decrypting the classical wavelength optical signal by using the received quantum key to obtain a decrypted service signal;
and the control unit is used for controlling whether the wavelength division multiplexing service processing unit utilizes the acquired quantum key to decrypt.
5. The wavelength division multiplexing receiving device of claim 4 wherein the wavelength separator has a separation from a classical wavelength to a quantum wavelength greater than a first threshold, and wherein the wavelength separator has a separation from an optical supervisory channel wavelength to a quantum wavelength greater than a second threshold.
6. A wavelength division multiplexing relay apparatus, comprising:
a demultiplexer for receiving the received optical signal, demultiplexing the combined optical signal into a quantum wavelength optical signal, an optical supervisory channel wavelength optical signal and a classical wavelength optical signal, sending the quantum wavelength optical signal to a quantum key relay unit, sending the optical supervisory channel wavelength optical signal to an optical supervisory channel relay unit, and sending the classical wavelength optical signal to a wavelength division multiplexing service relay unit, wherein the two-way optical supervisory channel wavelength optical signal is transmitted at different optical supervisory channel wavelengths in a first transmission fiber, the quantum wavelength optical signal is transmitted at an optical supervisory channel wavelength in a second transmission fiber, and the first transmission fiber and the second transmission fiber are paired transmission fibers between two communication parties;
the quantum key relay unit is used for receiving the quantum wavelength optical signals from the wave separator, providing a relay function for the quantum wavelength optical signals and sending the quantum wavelength optical signals to the wave combiner;
the optical monitoring channel relay unit supports single-fiber bidirectional communication, is used for receiving the optical signals of the optical monitoring channel wavelength from the wave splitter, provides a relay function for the optical signals of the optical monitoring channel, and sends the optical signals of the optical monitoring channel to the wave combiner;
the wavelength division multiplexing service relay unit is used for receiving the classical wavelength optical signal from the wave separator, providing a relay function for the classical wavelength optical signal and sending the classical wavelength optical signal to the wave combiner;
the combiner is configured to combine a quantum wavelength optical signal, an optical monitoring channel wavelength optical signal, and a classical wavelength optical signal, and transmit the combined optical signal, where the bidirectional optical monitoring channel wavelength optical signal is transmitted at different optical monitoring channel wavelengths in a first transmission optical fiber, and the quantum wavelength optical signal is transmitted at an optical monitoring channel wavelength in a second transmission optical fiber, where the first transmission optical fiber and the second transmission optical fiber are paired transmission optical fibers between two communication parties.
7. The wavelength division multiplexing relay device of claim 6 wherein the degree of separation of the combiner from the classical wavelength to the quantum wavelength is greater than a first threshold, the degree of separation of the combiner from the optical supervisory channel wavelength to the quantum wavelength is greater than a second threshold, the degree of separation of the splitter from the classical wavelength to the quantum wavelength is greater than the first threshold, and the degree of separation of the splitter from the optical supervisory channel wavelength to the quantum wavelength is greater than the second threshold.
8. The wdm repeater of claim 6, wherein said wdm service repeater unit is an optical amplifier unit for providing an optical signal amplification repeating function of a classical wavelength optical signal.
9. The wdm repeater of claim 6, wherein said wdm service repeating unit is an optoelectric optical reproducing unit for providing an optoelectric optical reproducing repeating function of a classical wavelength optical signal.
10. A wavelength division multiplexing transmission system comprising the wavelength division multiplexing transmission device according to any one of claims 1 to 3, and the wavelength division multiplexing reception device according to claim 4 or 5.
11. The wdm transmission system according to claim 10, further comprising the wdm relay apparatus according to any one of claims 6 to 9.
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| CN110212985B (en) | 2019-05-28 | 2021-07-27 | 上海交通大学 | Optical fiber time frequency and data combined transmission system and method |
| CN110213552A (en) * | 2019-06-25 | 2019-09-06 | 桂林电子科技大学 | A kind of wide-band communication system for transmission of video |
| 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 |
| CN111200492A (en) * | 2019-12-30 | 2020-05-26 | 国网北京市电力公司 | Quantum encryption method, device and equipment |
| CN111245618B (en) * | 2020-03-27 | 2022-09-06 | 江苏亨通问天量子信息研究院有限公司 | Internet of things secret communication system and method based on quantum key |
| CN111478746B (en) * | 2020-04-07 | 2022-05-31 | 中国信息通信研究院 | Quantum key distribution and optical communication system hybrid networking method and device |
| CN113541795B (en) * | 2020-04-17 | 2022-04-15 | 烽火通信科技股份有限公司 | Single-fiber bidirectional implementation method and equipment for OSC channel of wavelength division system |
| CN113556183B (en) * | 2020-04-26 | 2022-03-18 | 科大国盾量子技术股份有限公司 | Quantum communication system |
| CN115021859A (en) * | 2021-03-05 | 2022-09-06 | 华为技术有限公司 | Wavelength configuration device, system and method |
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