Control system, control method, and computer-readable storage medium

Abstract

The application provides a control system, comprising: at least three Ethernet interfaces, including a first Ethernet interface, a second Ethernet interface and a third Ethernet interface; a central control unit configured to be connected with a network controller of a quantum direct communication network through the first Ethernet interface, connected with a user terminal through the second Ethernet interface, and connected with a quantum direct communication device through the third Ethernet interface; an optical path connection component in communication connection with the central control unit; the central control unit is configured to: control the optical path connection component to connect a corresponding optical path according to an optical path connection instruction issued by the network controller; forward to-be-transmitted data sent by the user terminal to the quantum direct communication device; and / or forward data received by the quantum direct communication device to the user terminal; and close the first Ethernet interface when data exchange is carried out with the user terminal and / or the quantum direct communication device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quantum secure direct communication, and in particular to a control system and method for a quantum secure direct communication network node and a computer readable storage medium. BACKGROUND

[0002] Quantum direct communication was proposed in 2000, and its development has gone through the following four stages: (1) 2000-2004, the basic concepts and theories were established, and typical quantum direct communication protocols such as high-efficiency protocols based on entanglement, two-step protocols based on entanglement, and DL04 protocols based on single photons were proposed in this stage; (2) 2005-2015, development of protocols and application exploration stage, a large number of theoretical protocols were proposed, and the possible uses of quantum direct communication were widely explored; (3) 2016-2019, principle experiment verification and prototype development stage, in this stage, quantum direct communication protocols based on entanglement and single photon quantum direct communication schemes were verified in experiments; (4) since 2020, product development and practicalization promotion. The typical performance of the communication prototype in this stage is 10km@4kbps, which can realize real-time secure transmission of text, pictures and voice files, and 100km of quantum direct communication can be realized using low-loss optical fiber. The development of quantum secure direct communication prototype lays the foundation for quantum secure direct communication network and promotes the development of quantum secure direct communication network components.

[0003] In the quantum secure direct communication network, the terminal user needs to send the transmission data to the quantum secure direct communication device, and after the channel initialization is completed, the quantum secure direct communication device transmits the transmission data to another node in the network through the optical fiber channel, which is received by the quantum secure direct communication device of the node. After the quantum secure direct communication device receives the transmission data, it is sent to the terminal user of the node, thereby completing a quantum secure direct communication.

[0004] In the topology structure of the quantum secure direct communication network, each node is usually connected to multiple other nodes, and when the terminal user on a node has a communication demand, a communication request signal needs to be sent to the network controller of the quantum secure direct communication network, and then an optical fiber path switching signal is issued by the network controller. In the process of communication between the node controller of the node and the network controller of the quantum secure direct communication network, the terminal user of the node sends the transmission data to the quantum secure direct communication device through the node controller, and the transmission data is exposed to the line connected to the network controller, which is easy to cause data leakage, that is, the transmission data can be eavesdropped or intercepted on the network controller side or the path connected to the network controller and the node controller, which brings risks to quantum secure direct communication. SUMMARY

[0005] In view of at least one defect of the prior art, the present application provides a control system, comprising:

[0006] at least three Ethernet interfaces, including a first Ethernet interface, a second Ethernet interface, and a third Ethernet interface;

[0007] a central control unit configured to be connected with a network controller of a quantum direct communication network through the first Ethernet interface, connected with a user terminal through the second Ethernet interface, and connected with a quantum direct communication device through the third Ethernet interface;

[0008] an optical path connection component in communication connection with the central control unit;

[0009] the central control unit is configured to:

[0010] control the optical path connection component to connect a corresponding optical path according to an optical path connection instruction issued by the network controller;

[0011] forward to-be-transmitted data sent by the user terminal to the quantum direct communication device; and / or

[0012] forward transmission data received by the quantum direct communication device to the user terminal;

[0013] wherein, when data exchange is performed with the user terminal and / or the quantum direct communication device, the first Ethernet interface is closed.

[0014] According to an aspect of the present application, the central control unit is further configured to:

[0015] receive a communication request instruction sent by the user terminal;

[0016] send a route allocation request instruction to the network controller;

[0017] receive a route allocation data packet issued by the network controller, parse the route allocation data packet, obtain a route lookup table, and determine an optical path to be connected according to the route lookup table;

[0018] control the quantum direct communication device to perform channel initialization.

[0019] According to an aspect of the present application, the central control unit comprises a storage unit, and the central control unit is further configured to:

[0020] receive to-be-transmitted data sent by the user terminal and store the to-be-transmitted data in the storage unit;

[0021] After forwarding the to-be-transmitted data stored in the storage unit to the quantum direct communication device, the to-be-transmitted data in the storage unit is deleted.

[0022] According to an aspect of the present application, the central control unit is further configured to:

[0023] receive the received transmission data sent by the quantum direct communication device and store the received transmission data in the storage unit;

[0024] After forwarding the transmission data stored in the storage unit to the user terminal, the transmission data in the storage unit is deleted.

[0025] According to an aspect of the present application, the central control unit is further configured to:

[0026] control the quantum direct communication device to start channel initialization and stop forwarding the to-be-transmitted data sent by the user terminal to the quantum direct communication device;

[0027] After the quantum direct communication device completes channel initialization, continue to forward the to-be-transmitted data sent by the user terminal to the quantum direct communication device.

[0028] According to an aspect of the present application, the central control unit is further configured to:

[0029] analyze the communication request instruction sent by the user terminal to obtain routing information of the user terminal and access terminal device type information;

[0030] send the routing information of the user terminal and the access terminal device type information to the network controller.

[0031] According to an aspect of the present application, the optical path connection component further comprises:

[0032] a level converter connected to the central control unit, configured to receive the electrical signal sent by the central control unit and convert the electrical signal into a plurality of output voltages;

[0033] an optical switch array, one end of which is connected to the level converter and the other end of which is connected to a plurality of optical fibers, configured to open or close one or more optical switches in the optical switch array through the plurality of output voltages of the level converter.

[0034] According to an aspect of the present application, the central control unit is further configured to:

[0035] send an optical path connection completion instruction to the network controller;

[0036] The network controller sends a link initialization completion instruction after receiving the optical path connection completion instruction sent by the two communication parties.

[0037] The central control unit controls the quantum direct communication device to perform channel initialization after receiving the link initialization completion instruction.

[0038] According to an aspect of the present application, the control system further comprises:

[0039] A power supply unit configured to provide power supply for the at least three Ethernet interfaces, the central control unit, and the optical path connection component;

[0040] A clock unit configured to provide clock pulse signals for the central control unit to receive the optical path connection instruction and the communication request instruction in real time.

[0041] According to an aspect of the present application, the present application also provides a method for control using the control system as described above, comprising:

[0042] controlling the optical path connection component to connect the corresponding optical path according to the optical path connection instruction sent by the network controller through the central control unit;

[0043] forwarding the to-be-transmitted data sent by the user terminal to the quantum direct communication device through the central control unit; and / or

[0044] forwarding the transmission data received by the quantum direct communication device to the user terminal through the central control unit;

[0045] wherein the central control unit closes the first Ethernet interface when exchanging data with the user terminal and / or the quantum direct communication device.

[0046] According to an aspect of the present application, the method further comprises:

[0047] receiving the communication request instruction sent by the user terminal through the central control unit;

[0048] sending a route allocation request instruction to the network controller through the central control unit;

[0049] receiving the route allocation data packet sent by the network controller through the central control unit, analyzing the route allocation data packet, obtaining a route lookup table, and determining the optical path to be connected according to the route lookup table;

[0050] controlling the quantum direct communication device to perform channel initialization through the central control unit.

[0051] The application further provides a non-transitory computer readable storage medium having computer readable instructions stored thereon, which, when executed by a processor, cause the processor to perform the method described above.

[0052] The control system and control method for the quantum secure direct communication network node provided by the application are suitable for the quantum secure direct communication network architecture, adapt to different devices in the network, reduce the risk of data leakage in transmission, and realize the communication function, multi-channel logic output function, multi-user access, communication system control, data receiving and forwarding, and communication system control of the quantum secure direct communication network. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings without departing from the scope of the present application.

[0054] Figure 1 The control system provided by one embodiment of the application is shown;

[0055] Figure 2 The control system provided by one embodiment of the application is shown;

[0056] Figure 3 The control system provided by one embodiment of the application is shown;

[0057] Figure 4 The control system provided by one embodiment of the application is shown;

[0058] Figure 5 The control system provided by one embodiment of the application is shown;

[0059] Figure 6 The control system provided by one embodiment of the application is shown;

[0060] Figure 7 The quantum secure direct communication network in one embodiment of the application is shown;

[0061] Figure 8 The control method provided by one embodiment of the application is shown. DETAILED DESCRIPTION

[0062] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present application.

[0063] The embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The description of the above embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, the changes or deformations made by those skilled in the art according to the idea of the present application, based on the specific implementation manners and application scope of the present application, are within the scope of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

[0064] Since the router or switch technology in the existing classical communication cannot meet the interface requirements, hardware architecture requirements and control requirements of quantum secure direct communication, the present application provides a control system applied to a quantum secure direct communication network node. The node control system includes a central control unit, at least three Ethernet interfaces and an optical path connection component. The central control unit is connected with a network controller of a quantum secure direct communication network, a user terminal and a quantum secure direct communication device through the at least three Ethernet interfaces respectively. The corresponding Ethernet interfaces of the quantum secure direct communication device and the user terminal and the corresponding Ethernet interface of the network controller are designed to be physically isolated, so as to reduce the risk of data leakage in transmission. Moreover, the control system of the quantum secure direct communication network node provided by the present application supports a quantum secure direct communication protocol.

[0065] According to one embodiment of the present application, as shown in Figure 1 The present application provides a control system 100, which includes at least three Ethernet interfaces 110 (such as 110-1, 110-2 and 110-3 shown in the figure), a central control unit 120 and an optical path connection component 130. Wherein:

[0066] The central control unit 120 is connected with a network controller 200 of a quantum secure direct communication network through a first Ethernet interface (such as 110-1 shown in the figure); connected with a quantum secure direct communication device 300 through a second Ethernet interface (such as 110-2 shown in the figure); and connected with a user terminal 400 through a third Ethernet interface (such as 110-3 shown in the figure).

[0067] The optical path connection component 130 is in communication connection with the central control unit 120.

[0068] The central control unit 120 is configured to:

[0069] receive the optical path connection instruction issued by the network controller 200 of the quantum secure direct communication network, and control the optical path connection component 130 to connect the corresponding optical path according to the optical path connection instruction;

[0070] forward the to-be-transmitted data sent by the user terminal 400 to the quantum secure direct communication device 300; and / or

[0071] forward the transmitted data received by the quantum secure direct communication device 300 to the user terminal 400.

[0072] Wherein, when exchanging data with the user terminal 400 and / or the quantum secure direct communication device 300, the first Ethernet interface 110-1 is closed.

[0073] According to an embodiment of the present application, as shown in Figure 2 the at least three Ethernet interfaces 110 respectively include an Ethernet connector 111 and an Ethernet interface circuit 112. Optionally, the Ethernet interface circuit 112-1 of the first Ethernet interface 110-1 is independently designed, so that the central control unit 120 can independently control the opening or closing of the first Ethernet interface 110-1, i.e. physically isolating the line connected with the network controller 200 of the quantum secure direct communication network.

[0074] According to an embodiment of the present application, the central control unit 120 is further configured to:

[0075] load the node control program when the control system 100 is cold started, complete the initialization of the node control program, initialize the peripheral units in sequence, realize the detection and alarm functions of the peripheral units, and the central control unit 120 runs the node control program, including:

[0076] receive the communication request instruction sent by the user terminal 400, receive the to-be-transmitted data (i.e. communication data packet) sent by the user terminal 400 and store it, and forward the to-be-transmitted data to the quantum secure direct communication device 300.

[0077] analyze the communication request instruction sent by the user terminal 400, obtain the routing information and access terminal device type of the user terminal 400, send a routing allocation request instruction to the network controller 200, and send the routing information and access terminal device type of the user terminal 400 to the network controller 200. Send the access terminal device type of the user terminal 400 to the quantum secure direct communication device 300.

[0078] receive the routing allocation data packet issued by the network controller 200, analyze the routing allocation data packet, obtain the routing lookup table, and determine the optical path to be connected according to the routing lookup table.

[0079] The quantum secure direct communication device 300 is controlled to perform channel initialization.

[0080] According to an embodiment of the present application, as shown in Figure 3 The central control unit 120 further comprises a storage unit 121, and the central control unit 120 is further configured to:

[0081] The central control unit 120 receives the to-be-transmitted data sent by the user terminal 400 and stores the to-be-transmitted data in the storage unit 121.

[0082] After the to-be-transmitted data stored in the storage unit 121 is forwarded to the quantum secure direct communication device 300, the central control unit 120 deletes the to-be-transmitted data in the storage unit 121.

[0083] According to an embodiment of the present application, when the node receives the transmission data (i.e., the communication data packet) sent by the other node as the receiving party in the communication party, the central control unit 120 is further configured to:

[0084] The central control unit 120 receives the received transmission data sent by the quantum secure direct communication device 300 and stores the transmission data in the storage unit 121.

[0085] After the transmission data stored in the storage unit 121 is forwarded to the user terminal 400, the central control unit 120 deletes the transmission data in the storage unit 121.

[0086] According to an embodiment of the present application, the central control unit 120 is further configured to:

[0087] The central control unit 120 controls the quantum secure direct communication device 300 to start channel initialization, and stops forwarding the to-be-transmitted data sent by the user terminal 400 to the quantum secure direct communication device 300.

[0088] After the quantum secure direct communication device 300 completes the channel initialization, the central control unit 120 continues to forward the to-be-transmitted data sent by the user terminal 400 to the quantum secure direct communication device 300.

[0089] During the channel initialization process of the quantum secure direct communication device 300, the central control unit 120 stops forwarding the to-be-transmitted data (communication data packet), and after the initialization of the quantum secure direct communication device 300 is completed, the central control unit 120 is optionally sent an initialization completion instruction, and after receiving the initialization completion instruction, the central control unit 120 continues to forward the to-be-transmitted data (communication data packet) stored in the storage unit 121, and the quantum secure direct communication device 300 sends the received to-be-transmitted data (communication data packet) to the quantum secure direct communication device 300 of the receiving party node through the physical channel (the connected optical fiber path).

[0090] According to an embodiment of the present application, as shown inFigure 4 As shown in the figure, in the control system 100, the optical path connection component 130 further comprises a level converter 131 and an optical switch array 132. Wherein:

[0091] The level converter 131 is connected with the central control unit 120, and is configured to receive the electrical signal sent by the central control unit 120 and convert it into a plurality of output voltages.

[0092] The optical switch array 132 is connected with the level converter 131 at one end and connected with a plurality of optical fibers at the other end, and is configured to open or close one or more optical switches in the optical switch array 132 through the plurality of output voltages output by the level converter 131. Wherein the plurality of optical fibers are physical channels for transmitting data, and each optical fiber is connected with another node in the quantum secure direct communication network.

[0093] Wherein, the central control unit 120 receives the routing allocation data packet issued by the network controller 200 of the quantum secure direct communication network, analyzes the routing allocation data packet, obtains a routing lookup table, and the routing lookup table is determined by the layout of the optical switch array 132. The central control unit 120 determines the optical fiber path to be connected according to the routing lookup table.

[0094] According to an embodiment of the present application, in the control system 100, the central control unit 120 is further configured to:

[0095] send an optical path connection completion instruction to the network controller 200;

[0096] After the network controller 200 receives the optical path connection completion instructions sent by the two communication parties, the network controller 200 issues a link initialization completion instruction;

[0097] After the central control unit 120 receives the link initialization completion instruction, the central control unit 120 controls the quantum secure direct communication device 300 to perform channel initialization. Wherein, the channel initialization performed by the quantum secure direct communication device 300 includes: line quantum state preparation, quantum optical pulse signal sending, quantum optical pulse detection data receiving, data filtering, base and bit error rate index statistics. After channel initialization, the statistical index data such as bit error rate and counting rate meet the requirements, at this time, the quantum secure direct communication devices of the two communication parties reach a state that can safely communicate, that is, they can perform secure transmission of communication data.

[0098] According to an embodiment of the present application, as Figure 5 As shown in the figure, the control system 100 further comprises a power supply unit 140 and a clock unit 150.

[0099] The power supply unit 140 is configured to provide power supply for at least three Ethernet interfaces 110, the central control unit 120, and the optical path connection component 130;

[0100] The clock unit 150 is configured to provide clock signals for the central control unit 120 to receive the optical path connection instruction and the communication request instruction in real time.

[0101] According to an embodiment of the present application, as shown in Figure 6 The central control unit 120 in the control system 100 can be connected with a plurality of user terminals 400 through a plurality of Ethernet interfaces 110 respectively, so as to complete quantum secure direct communication of different user terminals in the same node.

[0102] According to an embodiment of the present application, the central control unit 120, the network controller 200, the quantum secure direct communication device 300 and the user terminal 400 adopt TCP / IP protocol, and the quantum secure direct communication devices of a plurality of nodes of the quantum secure direct communication network adopt quantum secure direct communication protocol.

[0103] The control system 100 provided by the present application can be arranged in each node of the quantum secure direct communication network. When a user terminal in the node has a communication demand, a communication request instruction is sent to the central control unit through the corresponding Ethernet interface, and the transmission data is forwarded to the quantum secure direct communication device through the central control unit. After the central control unit analyzes the communication request instruction, a routing allocation request instruction including routing information of the terminal user and a terminal device type is sent to the network controller through the corresponding Ethernet interface. After the network controller receives the routing allocation request instruction, a routing data packet is sent to the central control units of the two communication parties, and the central control unit determines the optical fiber path to be connected through a routing lookup table after receiving the routing data packet. The central control unit controls the optical switch array through a level converter to connect the corresponding optical fiber path, and the quantum secure direct communication device performs channel initialization (preheating). After the channel initialization is completed, the central control unit continues to forward the communication data packet. The quantum secure direct communication device transmits the transmission data to the target node through the connected optical fiber path. After the quantum secure direct communication device of the target node receives the transmission data, the transmission data is forwarded to the user terminal through the central control unit of the node. The quantum secure direct communication device, the user terminal, the network controller and the central control unit of the control system of each network node are connected through Ethernet lines, adopt TCP / IP protocol, and the quantum secure direct communication devices between two nodes are connected through optical fibers via the control systems between the two nodes, and adopt quantum secure direct communication protocol.

[0104] According to an embodiment of the present application, as shown in Figure 7As shown, the quantum secure direct communication network includes a plurality of nodes distributed in a mesh structure, and the control system 100 is optionally arranged at each node in the quantum secure direct communication network. For example, when the node 1 in the figure has a communication requirement for the node 2, for the node 2 receiving the transmission data (communication data packet), the central control unit 120 of the control system 100 arranged at the node 2 is configured to:

[0105] receive the optical path connection instruction and the routing allocation data packet issued by the network controller 200, analyze the routing allocation data packet, obtain a routing lookup table, determine the optical path to be connected according to the routing lookup table, and control the optical path connection component 130 to connect the corresponding optical path.

[0106] After the optical path connection component 130 connects the corresponding optical path, the central control unit 120 sends an optical path connection completion instruction to the network controller 200. After the network controller 200 receives the optical path connection completion instructions sent by the two communication parties, the network controller 200 issues a link initialization completion instruction. After the central control unit 120 receives the link initialization completion instruction, the central control unit 120 controls the quantum secure direct communication device 300 to perform channel initialization. The channel initialization performed by the quantum secure direct communication device 300 includes: line quantum state preparation, quantum optical pulse signal sending, quantum optical pulse detection data receiving, data filtering, basis and bit error rate index statistics. After channel initialization, the statistical index data such as bit error rate and counting rate meet the requirements, and at this time, the quantum secure direct communication devices of the two communication parties reach a state that can safely communicate, i.e., the communication data can be safely transmitted.

[0107] The quantum secure direct communication device 300 of the sender of the two communication parties sends the transmission data (communication data packet) to be transmitted to the quantum secure direct communication device 300 of the receiving node through the physical channel (connected optical fiber path).

[0108] The quantum secure direct communication device 300 sends the received transmission data (communication data packet) to the central control unit 120, and the central control unit 120 stores the received transmission data (communication data packet) in the storage unit 121 and forwards it to the user terminal 400.

[0109] After the central control unit 120 forwards all the transmission data (communication data packet) stored in the storage unit 121 to the user terminal 400, the central control unit 120 deletes the transmission data in the storage unit 121.

[0110] According to one embodiment of the present application, after the central control unit 120 forwards all the transmission data (communication data packets) stored in the storage unit 121 to the user terminal 400, the user terminal 400 sends a release connection instruction, and after the central control unit 120 receives the release connection instruction, the central control unit 120 sends the instruction to the quantum secure direct communication device 300 and the network controller 200 of the quantum secure direct communication network respectively, thereby completing the communication process between two nodes in the quantum secure direct communication network.

[0111] According to one embodiment of the present application, as shown in Figure 8 the present application also provides a method 10 for control using the control system 100 as described above, comprising steps S101 to S103. Wherein:

[0112] In step S101, the central control unit controls the optical path connection component to connect the corresponding optical path according to the optical path connection instruction issued by the network controller;

[0113] In step S102, the central control unit forwards the transmission data received by the quantum secure direct communication device to the user terminal; and / or

[0114] In step S103, the central control unit forwards the transmission data received by the quantum secure direct communication device to the user terminal.

[0115] Wherein, the central control unit closes the first Ethernet interface when exchanging data with the user terminal and / or the quantum secure direct communication device.

[0116] According to one embodiment of the present application, the control method 10 further comprises:

[0117] receiving, by the central control unit, a communication request instruction sent by the user terminal;

[0118] sending, by the central control unit, a routing allocation request instruction to the network controller;

[0119] receiving, by the central control unit, a routing allocation data packet issued by the network controller, analyzing the routing allocation data packet, obtaining a routing lookup table, and determining the optical path to be connected according to the routing lookup table;

[0120] controlling, by the central control unit, the quantum secure direct communication device to perform channel initialization.

[0121] According to one embodiment of the present application, wherein the central control unit comprises a storage unit, and the control method 10 further comprises:

[0122] receiving, by the central control unit, the to-be-transmitted data sent by the user terminal and storing the to-be-transmitted data in the storage unit;

[0123] after forwarding, by the central control unit, the to-be-transmitted data stored in the storage unit to the quantum secure direct communication device, deleting the to-be-transmitted data in the storage unit.

[0124] According to one embodiment of the present application, the central control unit comprises a storage unit, and the control method 10 further comprises:

[0125] receiving, by the central control unit, the received transmission data sent by the quantum secure direct communication device and storing the transmission data in the storage unit;

[0126] after forwarding, by the central control unit, the transmission data stored in the storage unit to the user terminal, deleting the transmission data in the storage unit.

[0127] According to one embodiment of the present application, the control method 10 further comprises:

[0128] controlling, by the central control unit, the quantum secure direct communication device to start channel initialization and stop forwarding the to-be-transmitted data sent by the user terminal to the quantum secure direct communication device;

[0129] after the quantum secure direct communication device completes channel initialization, continuing, by the central control unit, to forward the to-be-transmitted data sent by the user terminal to the quantum secure direct communication device.

[0130] According to one embodiment of the present application, the control method 10 further comprises:

[0131] analyzing, by the central control unit, the communication request instruction sent by the user terminal to obtain routing information of the user terminal and access terminal device type information;

[0132] sending, by the central control unit, the routing information of the user terminal and the access terminal device type information to the network controller.

[0133] According to one embodiment of the present application, the optical path connection assembly further comprises: a level converter connected with the central control unit; and an optical switch array, one end of which is connected with the level converter and the other end of which is connected with a plurality of optical fibers; and the control method 10 further comprises:

[0134] receiving, by the level converter, the electrical signal sent by the central control unit and converting the electrical signal into a plurality of output voltages;

[0135] The multiplexed output voltage output by the level converter turns on or off one or more optical switches in the optical switch array.

[0136] According to one embodiment of the present application, the control method 10 further comprises:

[0137] sending, by the central control unit, an optical path connection completion instruction to the network controller;

[0138] After the network controller receives the optical path connection completion instruction sent by both parties of communication, issuing a link initialization completion instruction;

[0139] After the central control unit receives the link initialization completion instruction, controlling the quantum secure direct communication device to perform channel initialization.

[0140] According to one embodiment of the present application, the control system further comprises a power supply unit and a clock unit, and the control method 10 further comprises:

[0141] The power supply unit provides power for the at least three Ethernet interfaces, the central control unit and the optical path connection component;

[0142] The clock unit provides a clock pulse signal for the central control unit to receive the optical path connection instruction and the communication request instruction in real time.

[0143] The present application also provides a non-transitory computer readable storage medium having computer readable instructions stored thereon, which, when executed by a processor, cause the processor to perform the control method 10 as described above.

[0144] The control system and control method for quantum secure direct communication network node provided by the present application are suitable for quantum secure direct communication network architecture, adapt to different devices in the network, reduce the risk of data leakage in transmission, and realize the functions of communication, multi-channel logical output, multi-user access, communication system control, data reception and forwarding, and communication system control of quantum secure direct communication network.

Claims

1. A control system, characterized in that, include: At least three Ethernet interfaces, including a first Ethernet interface, a second Ethernet interface, and a third Ethernet interface; The central control unit is configured to connect to the network controller of the quantum direct communication network via the first Ethernet interface, to the user terminal via the second Ethernet interface, and to the quantum direct communication device via the third Ethernet interface. The optical path connection component is communicatively connected to the central control unit. The central control unit is configured to: Receive communication request instructions sent by the user terminal; Send a route allocation request instruction to the network controller; According to the optical path connection command and route allocation data packet issued by the network controller, the optical path connection component is controlled to connect the corresponding optical path according to the optical path connection command, and the route allocation data packet is parsed to obtain the route lookup table. The optical path to be connected is determined according to the route lookup table. Control the quantum direct communication device to perform channel initialization; The data to be transmitted sent by the user terminal is forwarded to the quantum direct communication device; and / or The transmitted data received by the quantum direct communication device is forwarded to the user terminal; When exchanging data with the user terminal and / or the quantum direct communication device, the first Ethernet interface is turned off.

2. The control system of claim 1, wherein the central control unit includes a storage unit, and the central control unit is further configured to: Receive the data to be transmitted sent by the user terminal and store it in the storage unit; After forwarding the data to be transmitted stored in the storage unit to the quantum direct communication device, the data to be transmitted in the storage unit is deleted.

3. The control system of claim 2, wherein the central control unit is further configured to: The received transmission data sent by the quantum direct communication device is received and stored in the storage unit; After forwarding the transmission data stored in the storage unit to the user terminal, the transmission data in the storage unit is deleted.

4. The control system of claim 1, wherein the central control unit is further configured to: The system controls the quantum direct communication device to initiate channel initialization and stops forwarding the data to be transmitted sent by the user terminal to the quantum direct communication device. After the quantum direct communication device completes channel initialization, it continues to forward the data to be transmitted sent by the user terminal to the quantum direct communication device.

5. The control system of claim 1, wherein the central control unit is further configured to: The communication request command sent by the user terminal is parsed to obtain the routing information of the user terminal and the access terminal device type information; The routing information and access terminal device type information of the user terminal are sent to the network controller.

6. The control system of claim 1, wherein the optical path connection component further comprises: A level converter, connected to the central control unit, is configured to receive electrical signals sent by the central control unit and convert them into multiple output voltages; An optical switch array, one end of which is connected to the level converter and the other end of which is connected to multiple optical fibers, is configured to turn one or more optical switches in the optical switch array on or off through the multiple output voltages of the level converter.

7. The control system of claim 1, wherein the central control unit is further configured to: Send an optical path connection completion command to the network controller; After receiving the optical path connection completion instruction sent by both communicating parties, the network controller sends out the link initialization completion instruction; After receiving the link initialization completion instruction, the central control unit controls the quantum direct communication device to perform channel initialization.

8. The control system of claim 1, further comprising: The power supply unit is configured to provide power to the at least three Ethernet interfaces, the central control unit, and the optical path connection component. The clock unit is configured to receive the optical path connection command and the communication request command in real time from the central control unit and provide clock pulse signals.

9. A method for control using the control system as described in any one of claims 1-8, characterized in that, include: The central control unit controls the optical path connection component to connect the corresponding optical path according to the optical path connection command issued by the network controller; The central control unit forwards the data to be transmitted from the user terminal to the quantum direct communication device; and / or The central control unit forwards the transmitted data received by the quantum direct communication device to the user terminal. When the central control unit exchanges data with the user terminal and / or the quantum direct communication device, it shuts down the first Ethernet interface.

10. The method of claim 9, further comprising: The central control unit receives communication request commands sent by the user terminal. The central control unit sends a route allocation request instruction to the network controller; The central control unit receives routing allocation data packets from the network controller, parses the routing allocation data packets to obtain a routing lookup table, and determines the optical path to be connected based on the routing lookup table. The central control unit controls the quantum direct communication device to perform channel initialization.

11. A non-transitory computer-readable storage medium having stored thereon computer-readable instructions that, when executed by a processor, cause the processor to perform the method as described in claim 9 or 10.

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