A quantum secure local area network quantum base station switching processing method

Abstract

The present invention discloses a quantum base station switching processing method for a quantum secure local area network. A gateway server is used to uniformly manage quantum base stations and user terminals, and the load conditions of all quantum base stations in the local area network and the key usage conditions of user terminals are regularly collected. When the network state changes dynamically, the gateway server determines whether it is necessary to trigger the user terminal to switch the quantum base station according to the load conditions of all quantum base stations; if the switching needs to be triggered, the service quantum base station will relocate the quantum key allocated to the user terminal to the target quantum base station, and the gateway server will send the target quantum base station information to the user terminal to be switched. After receiving the target quantum base station information, the user terminal to be switched establishes a communication connection with the target quantum base station, and after the connection is successful, the communication connection with the original service quantum base station is disconnected, and the switching is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of quantum secure communication networking, and in particular to a quantum base station switching processing method for a quantum secure local area network. Background Art

[0002] Quantum communication is an interdisciplinary subject combining quantum physics and information theory, and is also an international research hotspot in quantum physics and information science. Quantum communication has the characteristics of high efficiency, large capacity, long-distance transmission and absolute security. According to the different implementation functions of quantum key distribution network nodes, quantum communication networking methods can be divided into networks based on trusted relay forwarding, networks based on optical switches, and networks based on centralized control station nodes. According to the coverage of the network, it can be divided into quantum local area network, quantum wide area network and global quantum Internet. Quantum local area network is still likely to be attacked, mainly because the network is physically connected. Network switching within the quantum local area network is carried out in collaboration with the gateway server and the quantum base station. The quantum base station is responsible for the relay and forwarding of quantum keys. The quantum keys and user data are synchronized to the user terminal to decrypt the encrypted information. As people's demand for communication services increases, the limited number of user service capabilities that a single quantum base station can carry may not be enough to carry all communication needs. Since the number of people online at quantum base stations in a quantum secure LAN changes dynamically, if there is no systematic and regular network switching method, it will be difficult to maintain a balanced load between different quantum base stations in the LAN, and it will be impossible to provide stable communication services for users. When the quantum secure LAN is operating at high load, network congestion is prone to occur, and user terminals often frequently switch and ping-pong between quantum base stations, resulting in low network access efficiency and poor results. User terminals will show unstable network signals, network disconnection, inability to access, or poor access signals, which makes users feel poor in network usage. When the network load does not reach the maximum or there are fewer online users at night, if all quantum base stations are online, services are not fully utilized, resource allocation is unreasonable, or the resource allocation mechanism is unscientific, it will also lead to waste of resources and burden the environment. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a quantum base station switching processing method for a quantum secure local area network, which uses a gateway server to uniformly manage quantum base stations and user terminals, regularly collects the load conditions of all quantum base stations in the local area network and the key usage of user terminals, and the user terminal selects a low-load quantum base station for resident communication when accessing the quantum secure local area network. At the same time, the network status is dynamically changing. When a quantum base station has a high load, it needs to switch to other low-load quantum base stations to achieve load balancing among all quantum base stations in the entire quantum secure local area network. When the number of online users is on a downward trend and the overall load of the quantum secure local area network is low, some quantum base stations need to be put into a dormant state to achieve the purpose of saving resources.

[0004] Technical solution: The present invention provides a quantum secure local area network quantum base station switching processing method, which includes the following steps:

[0005] S1. The gateway server regularly receives the load status of the quantum base station in the quantum secure local area network;

[0006] S2, the gateway server allocates the corresponding quantum base station as the service quantum base station to the user terminal according to the load situation in S1;

[0007] S3, the user terminal connects to the service quantum base station assigned by the gateway server, and the service quantum base station assigns a quantum key to the user terminal;

[0008] S4. The gateway server periodically receives the quantum key usage of the user terminal and the load of the current quantum base station;

[0009] S5. The gateway server periodically monitors the number of online users of all quantum base stations, and determines whether it is necessary to trigger the user terminal to switch the quantum base station according to the load conditions of all quantum base stations; if the switch needs to be triggered, the service quantum base station will move the quantum key allocated to the user terminal to the target quantum base station, and the gateway server will send the target quantum base station information to the user terminal to be switched. After receiving the target quantum base station information, the user terminal to be switched will establish a communication connection with the target quantum base station. After the connection is successful, the communication connection with the original service quantum base station will be disconnected, and the switch is completed.

[0010] As an improvement of the present invention, in step S1, the gateway server periodically receives the load status of the quantum base station in the quantum secure local area network, specifically:

[0011] All quantum base stations in the quantum secure local area network periodically report the load status of the current quantum base station, which includes the number of online users of the quantum base station. The gateway server periodically updates the number of online users of all quantum base stations in the quantum secure local area network and forms the latest list of online users.

[0012] As an improvement of the present invention, in step S2, the gateway server allocates a corresponding quantum base station as a service quantum base station to the user terminal according to the load condition in S1, specifically:

[0013] The user terminal logs in to the quantum secure LAN, establishes a connection with the gateway server and registers. The gateway server selects a quantum base station with the least number of online users as a service quantum base station and assigns it to the user terminal based on the latest list of online quantum base station users. The gateway server also transparently transmits the IP address and service port information of the service quantum base station to the user terminal.

[0014] As an improvement of the present invention, in step S3, the user terminal connects to the serving quantum base station assigned by the gateway server, and the serving quantum base station assigns a quantum key to the user terminal, specifically:

[0015] The user terminal receives the service quantum base station information assigned by the gateway server and performs resident communication with the service quantum base station. The service quantum base station determines the key usage of the user terminal. If the key is empty, the service quantum base station synchronizes the quantum key for it.

[0016] As an improvement of the present invention, in step S4, the gateway server receives the quantum key usage of the user terminal and the load of the current quantum base station, specifically:

[0017] The user terminal regularly reports the quantum key usage to the gateway server, where the quantum key usage includes the number of remaining available quantum keys; all quantum base stations in the quantum secure local area network regularly report the number of online users to the gateway server, and the gateway server updates the number of online users of all quantum base stations in the quantum secure local area network.

[0018] As an improvement of the present invention, in step S5, the gateway server regularly monitors the number of online users of all quantum base stations, and determines whether it is necessary to trigger the user terminal to switch the quantum base station according to the load conditions of all quantum base stations, specifically:

[0019] When the quantum secure local area network undergoes dynamic changes, the gateway server calculates the number of online users of all quantum base stations, and determines whether a switch needs to be triggered based on the calculation results. If a switch needs to be triggered, the target quantum base station and the user terminal information to be switched to the target quantum base station are sent to the serving quantum base station, and the target quantum base station is notified to prepare to receive quantum key relocation and user terminal switching.

[0020] The triggered switching is specifically divided into E1 switching, E2 switching and E3 switching. The E1 switching is used for switching in a balanced state, the E2 switching is used for switching in a high load state, and the E3 switching is used for switching in a low load state.

[0021] As an improvement of the present invention, the steps of E1 switching are specifically as follows:

[0022] A1: If the number of online users N of the quantum base station serving the quantum secure local area network is greater than the absolute threshold A of the quantum base station serving the quantum base station n , and the number of online users M of the target quantum base station is less than the absolute threshold B of the target quantum base station m , then event E1 is triggered; at the same time, the timer starts timing t1;

[0023] A2: If the duration of the event E1 is less than or equal to the preset time t1, then the event E1 is terminated and the timer is terminated; otherwise, the next step is executed;

[0024] A3: Switch the user terminal with the least number of remaining keys in the serving quantum base station to the target quantum base station to complete the E1 switch.

[0025] As an improvement of the present invention, the steps of E2 switching are specifically as follows:

[0026] B1: If the number of online users N of more than one running service quantum base station in the quantum secure local area network is greater than the absolute threshold A of the service quantum base station n , and the number of online users M of other running target quantum base stations is greater than or equal to the absolute threshold B of the target quantum base station m , at this time there is no target quantum base station for switching, so event E2 is triggered; at the same time, the timer starts timing t2;

[0027] B2: If the duration of the event E2 is less than or equal to the preset time t2, then the event E1 is terminated and the timer is terminated; otherwise, the next step is executed;

[0028] B3: wake up the backup quantum base station as the new target quantum base station, which will be greater than A n The user terminal with the least number of remaining keys in the threshold serving quantum base station switches to the new target quantum base station, completing the E2 switch.

[0029] As an improvement of the present invention, the step switching of E3 is specifically as follows:

[0030] C1: Regularly monitor the number of online users of all service quantum base stations in the quantum secure local area network. If the number of service quantum base stations that meet the preset condition one is greater than or equal to two, determine whether there are two quantum base stations that meet the preset condition two among the service quantum base stations that meet the preset condition one: if so, trigger event E3, and the timer starts timing t3; if not, return;

[0031] The preset condition 1 is configured as follows: the number of online users of the serving quantum base station is less than the migration threshold; the preset condition 2 is configured as follows: the two serving quantum base stations are respectively defined as the first serving quantum base station and the second serving quantum base station, the absolute threshold A1 of the first serving quantum base station is greater than the absolute threshold A2 of the second serving quantum base station, the migration threshold a1 of the first serving quantum base station is greater than the migration threshold a2 of the second serving quantum base station, and A2>(2×a1);

[0032] C2: If the duration of the event E3 is less than or equal to the preset time t3, then terminate the E3 event and the timer stops timing; otherwise, execute the next step;

[0033] C3: All user terminals of the serving quantum base station with fewer online users among the two serving quantum base stations that meet the preset condition 2 are switched to another serving quantum base station to complete the E2 switch. After the E2 switch is completed, the number of online users of the original serving quantum base station with fewer online users is reset to zero and enters a dormant state.

[0034] As an improvement of the present invention, A serving the quantum base station n 、a n , A1, a1, A2, a2 ​​and B of the target quantum base station m And times t1, t2 and t3 are configured by the gateway server according to the service capabilities of the quantum base station.

[0035] Beneficial effects of the present invention:

[0036] (1) Compared with the prior art, the present invention can provide a systematic method flow for quantum base station switching processing in a quantum secure local area network, provide a low-load quantum base station for user terminal login, and detect the load conditions of all quantum base stations in the local area network;

[0037] (2) It can maintain load balancing between different quantum base stations when the quantum secure local area network is operating at high load;

[0038] (3) Ability to avoid frequent switching and ping-pong switching when the quantum secure local area network changes dynamically;

[0039] (4) When the number of simultaneous online users in the quantum secure local area network is small, some quantum base stations can be put into a dormant state to achieve the purpose of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A quantum base station selection diagram when a user terminal of the method of the present invention logs into a quantum secure local area network;

[0041] Figure 2 This is a flow chart of quantum base station switching in the quantum secure local area network of the present invention;

[0042] Figure 3 This is the switching trigger flow chart of quantum secure local area network quantum base station E1;

[0043] Figure 4 This is the switching trigger flow chart of quantum secure local area network quantum base station E2;

[0044] Figure 5 This is the switching trigger flow chart of the quantum secure local area network quantum base station E3. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0046] The present invention proposes a quantum base station switching processing method for a quantum secure local area network, which can deploy multiple quantum base stations in a local area network to meet the load demand. The gateway server is responsible for managing all quantum base stations and user terminals in the quantum secure local area network, and saves the IP addresses and service port information of all quantum base stations and the identification information of user terminals; the gateway server controls the awakening and dormancy of quantum base stations. When there are many online users in the quantum secure local area network, more quantum base stations are awakened to meet the load demand. When there are fewer online users in the quantum secure local area network, user terminals are concentrated in a few base stations, and other quantum base stations are put into a dormant state.

[0047] In the present invention, the serving quantum base station refers to the quantum base station that the user terminal is using, and the target quantum base station refers to the quantum base station to which the user terminal is preparing to switch; the absolute threshold and the migration threshold are defined as the maximum critical value and the minimum critical value of the number of online users that the quantum base station can accommodate in the same performance test.

[0048] like Figure 1 As shown, a diagram of quantum base station selection when a user terminal logs into a quantum secure local area network is shown. All quantum base stations in the local area network periodically report the load of the current quantum base station, including the number of online users of the quantum base station. The gateway server saves a list of the latest number of online users of all quantum base stations in the quantum secure local area network. The user terminal logs into the quantum secure local area network, establishes a connection with the gateway server and registers. The gateway server selects a quantum base station with the least number of online users as a service quantum base station and assigns it to the user terminal based on the latest list of online users of the quantum base station, and transparently transmits the IP address and service port information of the service quantum base station to the user terminal. Subsequently, the user terminal receives the service quantum base station information assigned by the gateway server, communicates with the service quantum base station, and the service quantum base station determines the key usage of the user terminal. If the key is empty, the service quantum base station synchronizes the quantum key for it.

[0049] like Figure 2As shown, a flow chart of quantum base station switching in a quantum secure local area network is shown. The user terminal will regularly report the quantum key usage to the gateway server, including the number of remaining available quantum keys. All quantum base stations in the quantum secure local area network regularly report the number of online users to the gateway server, and the gateway server updates and maintains the load list of all quantum base stations in the secure local area network. When the quantum secure local area network changes dynamically, the gateway server calculates the network status and triggers switching, thereby sending the target quantum base station and the user terminal information to be switched to the target quantum base station to the serving quantum base station, and notifies the target quantum base station to prepare to receive quantum key relocation and user terminal switching. The serving quantum base station relocates the quantum key of the user terminal to be switched to the target quantum base station, and the gateway server sends the target quantum base station information to the user terminal to be switched. The user terminal to be switched establishes a communication connection with the target quantum base station, and disconnects the communication connection with the original serving quantum base station after success, and the switching is completed. The quantum secure local area network is dynamically changing. Taking into account network load and energy conservation and emission reduction factors, there are many different triggering scenarios for quantum base station switching, which can be divided into E1 switching, E2 switching and E3 switching. The E1 switching is used for switching under balanced conditions, the E2 switching is used for switching under high load conditions, and the E3 switching is used for switching under low load conditions. At the same time, in order to cope with different quantum base station software and hardware configurations and service capabilities, the triggering conditions for quantum base station switching are configurable and controllable, and are configured by the gateway server according to the service capabilities of the quantum base station.

[0050] Example 1

[0051] like Figure 3 As shown, the quantum secure local area network quantum base station E1 switching trigger flow chart is shown. E1 switching refers to when the number of online users N of the serving quantum base station is greater than the absolute threshold A of the serving quantum base station. n , and the number of online users M of the target quantum base station is less than the absolute threshold B of the target quantum base station m , which will trigger the E1 event. To prevent frequent switching and ping-pong switching, the timer starts counting. When the E1 event is met and lasts for a delay trigger time (TimeToTrigger) t1, the E1 switching is initiated, and the user terminal with the least number of remaining keys of the serving quantum base station is switched to the target quantum base station; if the number of online users of the serving quantum base station is less than or equal to the absolute threshold A within t1, n Or the number of online users of the target quantum base station is greater than or equal to the absolute threshold B m , then the termination event E1, t1 timer ends; A of each quantum base station n Threshold value, B mThe threshold value and t1 time can be configured by the gateway server according to the service capacity of the quantum base station. E1 switching is used to deal with the switching when the number of online users of at least one quantum base station is higher than the absolute threshold and the number of online users of at least one quantum base station is lower than the absolute threshold, which can keep the load of the quantum base stations running at high load in the quantum secure local area network balanced.

[0052] Example 2

[0053] like Figure 4 As shown, the quantum secure local area network quantum base station E2 switching trigger flow chart is shown. E2 switching means that there are one or more running service quantum base stations in the quantum secure local area network. The number of online users N is greater than the absolute threshold A of the service quantum base station. n , and the number of online users M of other running target quantum base stations is greater than or equal to the absolute threshold B of the target quantum base station m , at this time, there is no target quantum base station to switch to, so the E2 event is triggered. To prevent frequent switching and ping-pong switching, the timer starts timing. When the E2 event is met and lasts for a period of time t2, the E2 switch starts and wakes up the backup quantum base station as the new target quantum base station. When the backup quantum base station completes the startup and meets the use conditions, it will meet the A n The user terminal with the least remaining number of service quantum base station keys with the threshold value switches to the new target quantum base station; if the number of online users of the service quantum base station is less than or equal to the absolute threshold A within t1, n Or the number of online users is less than the absolute threshold B m If the target quantum base station is, then the E2 event is terminated and the t2 timer is terminated; the A of each quantum base station n Threshold value, B m The threshold value and t2 time can be configured by the gateway server according to the service capacity of the quantum base station. E2 switching is used to deal with the switching when the number of online users of the running quantum base station is higher than the absolute threshold. The backup quantum base station is started to share the load pressure for the original quantum base station, so as to maintain load balance when the quantum secure LAN is operating at ultra-high load.

[0054] Example 3

[0055] like Figure 5As shown, a quantum secure local area network quantum base station E3 switching triggering flow chart is shown. E3 switching means that the number of online users of all running service quantum base stations in the quantum secure local area network is less than the absolute threshold, and there are at least two or more running service quantum base stations with online users less than their own migration threshold. Two service quantum base stations are selected from them: the two service quantum base stations are defined as the first service quantum base station and the second service quantum base station, respectively. The absolute threshold A1 of the first service quantum base station is greater than the absolute threshold A2 of the second service quantum base station, the migration threshold a1 of the first service quantum base station is greater than the migration threshold a2 of the second service quantum base station, and A2>(2×a1), ensuring that the number of users after the merger will not be overloaded, then the E3 event is triggered. In order to prevent frequent switching and Ping-pong switching, the timer starts timing. When the E3 event is met and lasts for a period of time t3, the E3 switching is initiated, and all the users of the service quantum base station with fewer users in the two service quantum base stations are switched to the service quantum base station with more users. After the switching is completed, the number of online users of the original service quantum base station with fewer online users is cleared, and the service quantum base station enters the dormant state, completing the E3 switching; if the number of online users of the service quantum base station running in the quantum security local area network is greater than or equal to its own migration threshold within the t3 time, the E3 event ends, and the t3 timer ends; the A1 threshold value, A2 threshold value, a1 threshold value, a2 threshold value and t3 time of each quantum base station can be configured by the gateway server according to the service capacity of the service quantum base station. E3 switching is used to deal with the switching when the number of online users of at least two running quantum base stations is lower than the migration threshold. It can put some quantum base stations into a dormant state when the number of online users in the quantum security local area network is small at the same time, so as to achieve the purpose of energy saving and emission reduction.

[0056] In the above embodiments, the present invention can migrate users in a quantum base station with a number higher than the absolute threshold when there are too many online users therein, thereby balancing the load of the quantum base station with a lower number of online users; and migrate users in a quantum base station with a number lower than the migration threshold when there are too few online users therein, thereby merging the users therein to other quantum base stations, thereby avoiding waste of resources.

Claims

1. A quantum secure local area network quantum base station switching processing method, characterized in that: The following steps are involved: S1. The gateway server regularly receives the load status of the quantum base station in the quantum secure local area network; S2, the gateway server allocates the corresponding quantum base station as the service quantum base station to the user terminal according to the load situation in S1; S3, the user terminal connects to the service quantum base station assigned by the gateway server, and the service quantum base station assigns a quantum key to the user terminal; S4. The gateway server periodically receives the quantum key usage of the user terminal and the load of the current quantum base station; S5. The gateway server regularly monitors the number of online users of all quantum base stations, and determines whether it is necessary to trigger the user terminal to switch the quantum base station according to the load conditions of all quantum base stations; If a handover needs to be triggered, the serving quantum base station will move the quantum key assigned to the user terminal to the target quantum base station. The gateway server will send the target quantum base station information to the user terminal to be switched. After receiving the target quantum base station information, the user terminal to be switched will establish a communication connection with the target quantum base station. After the connection is successful, the communication connection with the original serving quantum base station will be disconnected, and the handover is completed. In step S5, the gateway server regularly monitors the number of online users of all quantum base stations, and determines whether it is necessary to trigger the user terminal to switch the quantum base station according to the load conditions of all quantum base stations, specifically: When the quantum secure local area network undergoes dynamic changes, the gateway server calculates the number of online users of all quantum base stations, and determines whether a switch needs to be triggered based on the calculation results. If a switch needs to be triggered, the target quantum base station and the user terminal information to be switched to the target quantum base station are sent to the serving quantum base station, and the target quantum base station is notified to prepare to receive quantum key relocation and user terminal switching. The trigger switching is specifically divided into E1 switching, E2 switching and E3 switching, wherein the E1 switching is used for switching in a balanced state, the E2 switching is used for switching in a high load state, and the E3 switching is used for switching in a low load state; The steps of E1 switching are specifically as follows: A1: If the number of online users N of the quantum base station serving the quantum secure local area network is greater than the absolute threshold A of the quantum base station serving the quantum base station n , and the number of online users M of the target quantum base station is less than the absolute threshold B of the target quantum base station m , then event E1 is triggered; at the same time, the timer starts timing t1; A2: If the duration of the event E1 is less than or equal to the preset time t1, then the event E1 is terminated and the timer is terminated; otherwise, the next step is executed; A3: Switch the user terminal with the least number of remaining keys in the serving quantum base station to the target quantum base station to complete the E1 switch; The steps of E2 switching are specifically as follows: B1: If the number of online users N of more than one running service quantum base station in the quantum secure local area network is greater than the absolute threshold A of the service quantum base station n , and the number of online users M of other running target quantum base stations is greater than or equal to the absolute threshold B of the target quantum base station m , at this time there is no target quantum base station for switching, so event E2 is triggered; at the same time, the timer starts timing t2; B2: If the duration of the event E2 is less than or equal to the preset time t2, then the event E1 is terminated and the timer is terminated; otherwise, the next step is executed; B3: wake up the backup quantum base station as the new target quantum base station, which will be greater than A n The user terminal with the least number of remaining keys in the threshold serving quantum base station switches to the new target quantum base station, completing the E2 switch; The step switching of E3 is specifically as follows: C1: Regularly monitor the number of online users of all service quantum base stations in the quantum secure local area network. If the number of service quantum base stations that meet the preset condition one is greater than or equal to two, determine whether there are two quantum base stations that meet the preset condition two among the service quantum base stations that meet the preset condition one: if so, trigger event E3, and the timer starts timing t3; if not, return; The preset condition 1 is configured as follows: the number of online users serving the quantum base station is less than the migration threshold; The preset condition 2 is configured as follows: the two serving quantum base stations are respectively defined as a first serving quantum base station and a second serving quantum base station, the absolute threshold A1 of the first serving quantum base station is greater than the absolute threshold A2 of the second serving quantum base station, the migration threshold a1 of the first serving quantum base station is greater than the migration threshold a2 of the second serving quantum base station, and A2>(2×a1); C2: If the duration of the event E3 is less than or equal to the preset time t3, then terminate the E3 event and the timer stops timing; otherwise, execute the next step; C3: All user terminals of the serving quantum base station with fewer online users among the two serving quantum base stations that meet the preset condition 2 are switched to another serving quantum base station to complete the E2 switch. After the E2 switch is completed, the number of online users of the original serving quantum base station with fewer online users is reset to zero and enters a dormant state.

2. The method for switching quantum base stations in a quantum secure local area network according to claim 1, characterized in that: In step S1, the gateway server periodically receives the load status of the quantum base station in the quantum secure local area network, specifically: All quantum base stations in the quantum secure local area network periodically report the load status of the current quantum base station, which includes the number of online users of the quantum base station. The gateway server periodically updates the number of online users of all quantum base stations in the quantum secure local area network and forms the latest list of online users.

3. The method for switching quantum base stations in a quantum secure local area network according to claim 1, characterized in that: In step S2, the gateway server allocates a corresponding quantum base station as a service quantum base station to the user terminal according to the load condition in S1, specifically: The user terminal logs in to the quantum secure LAN, establishes a connection with the gateway server and registers. The gateway server selects a quantum base station with the least number of online users as a service quantum base station and assigns it to the user terminal based on the latest list of online quantum base station users. The gateway server also transparently transmits the IP address and service port information of the service quantum base station to the user terminal.

4. The method for switching quantum base stations in a quantum secure local area network according to claim 1, characterized in that: In step S3, the user terminal connects to the serving quantum base station assigned by the gateway server, and the serving quantum base station assigns a quantum key to the user terminal, specifically: The user terminal receives the service quantum base station information assigned by the gateway server and performs resident communication with the service quantum base station. The service quantum base station determines the key usage of the user terminal. If the key is empty, the service quantum base station synchronizes the quantum key for it.

5. The method for switching quantum base stations in a quantum secure local area network according to claim 1, characterized in that: In step S4, the gateway server receives the quantum key usage of the user terminal and the load of the current quantum base station, specifically: The user terminal regularly reports the quantum key usage to the gateway server, where the quantum key usage includes the number of remaining available quantum keys; all quantum base stations in the quantum secure local area network regularly report the number of online users to the gateway server, and the gateway server updates the number of online users of all quantum base stations in the quantum secure local area network.

6. The method for switching quantum base stations in a quantum secure local area network according to claim 1, characterized in that: A serving quantum base station n 、a n , A1, a1, A2, a2 ​​and B of the target quantum base station m And times t1, t2 and t3 are configured by the gateway server according to the service capabilities of the quantum base station.

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