Wireless communication method, device and communication equipment

Abstract

The present invention discloses a wireless communication method, apparatus, and equipment. The method includes: when a communication requirement exists between a train and a station, determining whether quantum communication conditions are met between the train and the station; if so, establishing a quantum communication link between the train and the station, assigning a quantum public key from a quantum key pair to the train, and assigning a quantum private key from a quantum key pair to the station; controlling the train to encrypt train data original text using the quantum public key to obtain train data ciphertext, and transmitting the train data ciphertext to the station, which then decrypts the train data ciphertext using the quantum private key. Using quantum keys to encrypt communication data prevents eavesdroppers from cracking the key and eavesdropping on communication information, thereby improving the security of communication data transmission within the railway communication system.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of Internet technology, and in particular to a wireless communication method, apparatus, and communication equipment. Background Art

[0002] Traditional wireless communication systems use radio frequency signals for data transmission. Due to the inherent openness of radio frequency signal propagation, traditional wireless communication systems are vulnerable to eavesdropping, decryption, and attacks by unauthorized users. Existing railway freight station communication systems utilize wireless transmission, which also presents significant information security risks and can even affect communication security between trains and stations.

[0003] Quantum communication, a form of communication that uses the principles of quantum mechanics to manipulate quantum states, can effectively address information security issues. This paper proposes a highly reliable, eavesdropping-proof encrypted communication method and system suitable for railway wireless communications. By integrating quantum key distribution into existing railway communication systems, this system forms a new encrypted communication system with both quantum and wireless communication channels. This system significantly improves the security of communication and data transmission within railway communication systems. Summary of the Invention

[0004] The present invention provides a wireless communication method, apparatus and communication equipment, which use quantum keys to encrypt communication data between trains and stations, thereby improving the communication data transmission security of the railway communication system.

[0005] In a first aspect, an embodiment of the present invention provides a wireless communication method, the method comprising:

[0006] When there is a communication demand between the train and the station, determine whether the train and the station meet the quantum communication conditions;

[0007] If the conditions are met, a quantum communication link is established between the train and the station, and the train is assigned a quantum public key from the quantum key pair, and the station is assigned a quantum private key from the quantum key pair;

[0008] The control train uses the quantum public key to encrypt the train data original text to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0009] In a second aspect, an embodiment of the present invention further provides a wireless communication device, the device comprising:

[0010] A communication condition judgment module is used to determine whether the quantum communication conditions between the train and the station are met when there is a communication demand between the train and the station;

[0011] A communication link building module, used to build a quantum communication link between the train and the station, and to distribute the quantum public key in the quantum key pair to the train and the quantum private key in the quantum key pair to the station;

[0012] The data ciphertext transmission module is used to control the train to use the quantum public key to encrypt the train data original text to obtain the train data ciphertext, and send the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0013] In a third aspect, an embodiment of the present invention further provides a communication device, the communication device comprising:

[0014] one or more processors;

[0015] a memory for storing one or more programs;

[0016] Detector, used to detect whether the quantum communication conditions are met between the train and the station

[0017] When the one or more programs are executed by the one or more processors, the one or more processors implement the wireless communication method as described in any embodiment of the present invention.

[0018] The technical solution provided by the embodiments of the present invention uses environmental noise information and the distance between the train and the station to determine whether quantum communication conditions are met between the train and the station. If the conditions are met, a quantum key pair is assigned to the train and the station, enabling the train and the station to use quantum keys to encrypt and decrypt communication data. This solves the problem of insecure and accurate communication between the two parties, where, if the key held by one or both parties is stolen, hackers can use the stolen key to read and modify the original data. It also addresses the problem of significant interference from environmental noise, which affects data quality, and data transmission distance limitations, when using traditional wireless communication between trains and stations when spectrum is unavailable within the station. Quantum keys are used to encrypt the original data of the communication information to be transmitted. The particle collapse properties of quantum keys ensure the accuracy and security of data transmission during the communication process. This allows for the selective establishment of quantum communication links based on environmental noise and the distance between the train and the station, ensuring the quality of data transmission during wireless communication over quantum communication links. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a flowchart of a wireless communication method provided by Embodiment 1 of the present invention;

[0020] Figure 2is a flowchart of a wireless communication method provided by Embodiment 2 of the present invention;

[0021] Figure 3 is a flowchart of a wireless communication method provided by Embodiment 3 of the present invention;

[0022] Figure 4 This is a structural diagram of a wireless communication method provided by a fourth embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a wireless communication device provided in Embodiment 5 of the present invention;

[0024] Figure 6 A structural diagram of a communication device provided in Example 6 of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0026] Figure 1 This is a flow chart of a wireless communication method provided by the first embodiment of the present invention. This embodiment is applicable to situations where trains conduct encrypted communications at stations; in particular, it is applicable to situations where trains communicate between stations via quantum communication links and use quantum key pairs to encrypt and decrypt communication data. This method can be executed by a wireless communication device, which can be implemented in software and / or hardware and can be integrated into a communication device that carries communication functions, such as a server. Figure 1 As shown, the wireless communication method provided in this embodiment specifically includes:

[0027] S110. When there is a communication demand between the train and the station, determine whether quantum communication conditions are met between the train and the station.

[0028] Quantum communication is a novel communication method that utilizes quantum superposition and entanglement to transmit information. Based on the three principles of quantum mechanics, uncertainty, measurement collapse, and non-cloning, it provides absolute security against eavesdropping and computational cracking. The quantum communication process is as follows: a pair of entangled particles is constructed and placed at each communicating party. A particle with an unknown quantum state is measured jointly with the sender's particle. The receiving party's particle instantly collapses to a state that is symmetrical with the collapsed state of the sender's particle. The joint measurement information is then transmitted to the receiver via a classical channel. The receiver performs a unitary transformation on the collapsed particle based on the received information, obtaining the exact same unknown quantum state as the sender's. If the quantum state of one of the two entangled particles changes, the quantum state of the other will also change immediately. According to quantum theory, any macroscopic observation or interference will immediately alter the quantum state, causing it to collapse. Quantum communication involves placing two particles at each communicating party, and the collapsed states of the two particles are symmetrical. Quantum keys are random. Even if they are intercepted by a thief, the thief cannot obtain the correct key. Moreover, since the intercepted quantum key has been destroyed by the thief's interference with the quantum key, the intercepted quantum key cannot be used to crack the information encrypted by the quantum key to obtain the correct information.

[0029] Specifically, quantum communication conditions are met between a train and a station when the distance between them is within the quantum communication range. This range is generally line-of-sight and can be set based on the actual situation between the train and the station. For example, the quantum communication condition can be set to a distance of less than or equal to 300 meters. To ensure train safety during operation and to provide timely information on train status, a communication link must be established between the train and the station when communication needs arise. A possible communication requirement between a train and a station might be that a train sends an arrival reminder to the station via a communication link when approaching the station. Upon receiving the arrival reminder, the station can arrange for staff to promptly meet the train. Alternatively, a communication link might be established between the train and the station when a train requests weather information for the area in which the station is located. Communication between the train and the station must adhere to a pre-agreed communication protocol between the train and the station.

[0030] For example, when a train needs to communicate with a station to alert it of its approaching train, communication between the train and the station is required. The train sends a communication request to the station, and the station's backend server receives the communication request and determines whether the train and the station meet the conditions for quantum communication.

[0031] Preferably, this step can determine whether the train and the station meet the quantum communication conditions based on the distance between the train and the station and the environmental noise information. Specifically, it can be achieved through the following sub-steps: Determining whether the train and the station meet the quantum communication conditions includes:

[0032] S1101. Determine the distance between the train and the station.

[0033] Specifically, station location information is fixed and can be pre-stored in a station backend server. Trains are equipped with positioning systems that can detect the train's current location in real time. The station backend server can obtain the train's current location information detected by the train positioning system in real time. When communication between a train and a station is required, the station backend server receives the train's current location information from the train and, combined with the station's location information, calculates the distance between the train and the station.

[0034] S1102: Collect environmental noise information of the train.

[0035] Specifically, the interaction between quantum systems and the external environment generates environmental noise that destroys quantum entanglement. Due to the unavoidable presence of environmental noise in quantum communication links, such as joint unitary noise, the quality of the "quantum entangled state" gradually decreases with increasing transmission distance. This means that the entanglement between the two particles degrades with increasing propagation distance, and the amount of entanglement decreases as the distance increases. Collecting environmental noise information from the train can be achieved by establishing a noise model for the quantum communication channel. Commonly used models for characterizing noise in quantum communication channels include the unitary noise model and the pure attenuation model for continuous variable systems.

[0036] S1103. Determine whether quantum communication conditions are met between the train and the station based on the distance value and environmental noise information.

[0037] Specifically, a machine learning algorithm can be used to calculate the distance threshold required to establish quantum communication between the train and the station based on the collected environmental noise information of the train. If the distance between the train and the station is less than or equal to the distance threshold, it is determined that the quantum communication conditions between the train and the station are met; if the distance between the train and the station is greater than the distance threshold, the quantum communication conditions between the train and the station are not met.

[0038] S120. If the conditions are met, a quantum communication link is established between the train and the station, and the quantum public key in the quantum key pair is allocated to the train, and the quantum private key in the quantum key pair is allocated to the station.

[0039] The quantum communication link refers to the quantum communication link between the train and the station. Quantum key refers to the BB84 protocol for quantum key distribution, which is based on the measurement principles of quantum mechanics. Quantum key distribution leverages the properties of quantum mechanics to ensure communication security, enabling both communicating parties to generate and share a random, secure key to encrypt and decrypt messages. When communication between a train and a station is required and the conditions for quantum communication between the two are met, the station's backend server can assign a quantum public key from the quantum key to the train and a quantum private key from the quantum key to the station.

[0040] Specifically, after the station backend server obtains the current location information of the train and calculates the distance value between the train and the station, it determines whether the distance value between the train and the station meets the quantum communication conditions by comparing the distance value between the train and the station with the distance threshold. If the quantum communication conditions are met, the station backend server can establish a quantum communication link between the train and the station, so that the train and the station can communicate through the quantum communication link.

[0041] S130. The control train uses the quantum public key to encrypt the original train data to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0042] The original data refers to the communication content sent by the train to the station, and the communication content can be transmitted in the form of data in the quantum communication link.

[0043] Specifically, after establishing a quantum communication link, the station's backend server further controls the train to use quantum keys to encrypt the original train data to be sent to the station. The encrypted original train data is the train data ciphertext. The train sends the ciphertext to the station. After receiving the ciphertext, the station uses the quantum private key to decrypt it. After decryption, the station can obtain the original train data sent by the train.

[0044] For example, a train uses a quantum public key to encrypt the original train data to obtain the ciphertext, and then sends the ciphertext to the station. During the transmission process, the train's quantum public key used for encryption is stolen by a hacker. The hacker interferes with the particles in the theft process, causing the quantum states of the particles that constitute the quantum public key and quantum private key to collapse. The collapsed quantum private key can decrypt the ciphertext of the train data encrypted by the collapsed quantum public key. Even if the hacker successfully decrypts the stolen quantum public key, it cannot decrypt the ciphertext of the train data to obtain the original train data.

[0045] The technical solution provided by the embodiments of the present invention uses environmental noise information and the distance between the train and the station to determine whether quantum communication conditions are met between the train and the station. If the conditions are met, a quantum key pair is assigned to the train and the station, enabling the train and the station to use quantum keys to encrypt and decrypt communication data. This solves the problem of inability to securely and accurately communicate information between the two parties if the key held by one or both parties is stolen during communication. It also addresses the problem of significant interference from environmental noise, which affects data transmission quality, and data transmission is limited by transmission distance when using traditional wireless communication between trains and stations in the absence of spectrum within the station. By using quantum keys to encrypt the original data of the communication information to be transmitted, and leveraging the particle collapse properties of quantum keys, the accuracy and security of data transmission are ensured during the communication process, the selective construction of quantum communication links based on environmental noise and the distance between the train and the station is achieved, ensuring the quality of data transmission during wireless communication over the quantum communication link.

[0046] In the wireless communication method provided in this embodiment, a preferred technical solution is that the quantum key pair is generated according to the communication protocol between the train and the station.

[0047] The communication protocol between the train and the station may be pre-negotiated.

[0048] Specifically, the train and the station pre-agreed on a communication protocol for building a quantum communication link. When there is a communication demand between the train and the station, the train uses the communication protocol for building a quantum communication link to send a request for building a quantum communication link to the station. After the station receives this request, the station backend server uses the communication protocol for building a quantum communication link to read the request sent by the train. If the reading is successful, the station backend server builds a quantum communication link between the station and the train, and distributes quantum key pairs to the train and the station, that is, the quantum public key in the quantum key pair is distributed to the train, and the quantum private key in the quantum key pair is distributed to the station.

[0049] Through the communication protocol between the train and the station, the quantum communication link is established between the train and the station after receiving the request for establishing the quantum communication link sent by the train. This allows the station server to not establish the quantum communication link when it does not receive the request for establishing the quantum communication link sent by the train, thereby avoiding the problem of the established quantum communication link not being used by the train and the station, and saving communication resources.

[0050] Example 2

[0051] Figure 2This is a flow chart of a wireless communication method provided by the second embodiment of the present invention. This embodiment further explains in detail how to "send train data ciphertext to the station" based on the above embodiment. Specifically, Figure 2 As shown, the wireless communication method provided in this embodiment may include:

[0052] S210. When there is a communication demand between the train and the station, determine whether quantum communication conditions are met between the train and the station.

[0053] S220. If the conditions are met, a quantum communication link is established between the train and the station, and the quantum public key in the quantum key pair is allocated to the train, and the quantum private key in the quantum key pair is allocated to the station.

[0054] S230. The control train uses the quantum public key to encrypt the original train data to obtain the ciphertext of the train data, and detects the link status of the quantum communication link.

[0055] The link status of the quantum communication link can be normal or abnormal. A normal link status means that the distance between the train and the station meets the quantum communication conditions; an abnormal link status means that the distance between the train and the station does not meet the quantum communication conditions.

[0056] Specifically, the station backend server stores the location information of each station and can obtain the train's current location information detected by the train's positioning system in real time. After the station backend server assigns a quantum public key to the train and a quantum private key to the station, the train uses the quantum public key to encrypt the original train data. After the station backend server assigns a quantum key pair to the train and station, it recalculates the distance between the train and the station and compares the distance value with the distance threshold to determine whether the train and station still meet the quantum communication conditions. After the key pair is assigned, the quantum communication link status is determined.

[0057] S240: If the link status is abnormal, re-execute S210.

[0058] Specifically, if the station backend server allocates a quantum key pair to the train and the station, and then calculates again that the distance value between the train and the station does not meet the quantum communication conditions, that is, the link status is abnormal, the link abnormality message will be fed back to the train, and the train will stop sending the train data ciphertext to the station. The station backend server will continue to calculate the distance value between the train and the station in real time, and determine whether the quantum communication conditions are met between the train and the station based on the distance value.

[0059] Optionally, when the distance between the train and the station exceeds a distance threshold, that is, when the train leaves the quantum communication range, an abnormal link state may occur. A time threshold is pre-set. If the train backend server detects that the train has been out of the quantum communication range for a time exceeding the pre-set time threshold, the quantum key pair assigned to the train and the station will be destroyed, and the distance between the train and the station will continue to be calculated in real time until the distance between the train and the station meets the quantum communication conditions. At this time, a new quantum key pair will be assigned to the train and the station.

[0060] S250. When the link status is normal, send the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0061] Specifically, if the station backend server allocates a quantum key pair to the train and the station, and then calculates again that the distance value between the train and the station meets the quantum communication conditions, that is, the link status is normal, then the normal link message will be fed back to the train, and the train will send the train data ciphertext to the station. After the station receives the train data ciphertext sent by the train, it can use the quantum private key to decrypt the train data ciphertext, obtain the original train data, and obtain the communication information sent by the train by reading the original train data.

[0062] The technical solution provided by the embodiment of the present invention, after assigning a key pair to the train and the station, rechecks the link status of the quantum communication link to see if it is normal. If the link status is normal, the train is controlled to send the train data ciphertext to the station. If the link status is abnormal, the link status of the quantum communication link is continuously checked until it is determined that the quantum communication conditions between the train and the station are met. Then, the quantum communication link is re-established between the train and the station, and the quantum key pair is re-assigned to the train and the station. This solves the problem of a train being unable to change the communication content and communication time with the station in a timely manner after establishing a quantum communication link during travel. The train can determine whether to send the train data ciphertext to the station based on the communication link status, and can also change the communication plan and communication content in a timely manner based on the link status.

[0063] Example 3

[0064] Figure 3 This is a flow chart of a wireless communication method provided by the third embodiment of the present invention. This embodiment is based on the above embodiment, and adds that when the quantum communication conditions between the train and the station are not met, communication can be carried out through a non-quantum communication link. Specifically, Figure 3 As shown, the wireless communication method provided in this embodiment may include:

[0065] S310: When there is a communication demand between the train and the station, determine whether quantum communication conditions are met between the train and the station.

[0066] S320. If the conditions are met, a quantum communication link is established between the train and the station, and the quantum public key in the quantum key pair is allocated to the train, and the quantum private key in the quantum key pair is allocated to the station.

[0067] S330. The control train uses the quantum public key to encrypt the original train data to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0068] S340. If the quantum communication conditions between the train and the station are not met, a non-quantum communication link is established between the train and the station, and a non-quantum public key in a non-quantum key pair is allocated to the train, and a non-quantum private key in a non-quantum key pair is allocated to the station.

[0069] Non-quantum communications can include digital wireless communications, analog wireless communications, and satellite communications. A key is a parameter that is input into an algorithm that converts plaintext into ciphertext or vice versa. The data format and composition of the non-quantum private key and non-quantum public key in a non-quantum key pair are fixed and will not change due to external interference.

[0070] Specifically, when quantum communication conditions are not met between the train and the station, a non-quantum communication link can be used for communication. The station's backend server allocates a non-quantum key pair to the train and the station, assigning a non-quantum public key to the train and a non-quantum private key to the station.

[0071] S350. The control train uses the non-quantum public key to encrypt the train data original text to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the non-quantum private key to decrypt the train data ciphertext.

[0072] Specifically, after the station backend server distributes a non-quantum key pair to the train and the station, the station backend server controls the train to use the non-quantum public key to encrypt the original train data. The encrypted original train data is the train data ciphertext. After the train obtains the encrypted train data ciphertext, it can send the train data ciphertext to the station via a non-quantum communication link. After receiving the train data ciphertext, the station uses the non-quantum private key to decrypt the train data ciphertext to obtain the original train data. By reading the original train data, it can obtain the communication information sent by the train.

[0073] The technical solution provided by the embodiments of the present invention enables communication between trains and stations using non-quantum communication links when quantum communication conditions are not met. When using a non-quantum communication link, non-quantum key pairs are used to encrypt and decrypt the information to be transmitted. This solves the problem of being unable to establish a quantum communication link when quantum communication conditions are not met, resulting in a lack of timely communication between the trains and stations. This solution enables communication between trains and stations using a quantum communication link when quantum communication conditions are met, and using a non-quantum communication link when quantum communication conditions are not met, thereby ensuring timely communication between trains and stations.

[0074] Example 4

[0075] Figure 4 This is a schematic diagram of a wireless communication method provided by the fourth embodiment of the present invention. This embodiment is applicable to the case where a 400M wireless communication system is used for wireless communication between a train and a station, wherein the wireless communication is implemented based on quantum communication. Specifically, Figure 4 As shown, the wireless communication method provided by this embodiment is:

[0076] When the train enters the 400M wireless communication range of the ground base station, the train or station can initiate a 400M wireless communication connection request through the wireless communication system based on communication needs. After receiving the 400M wireless communication connection request, the wireless communication system establishes a 400M communication link between the train and the station.

[0077] For example, based on communication needs, the train initiates a 400M wireless communication connection request through the wireless communication system. After the station backend server detects the station's wireless communication link request, it obtains the train's current location information and calculates the distance between the train and the station. By comparing the distance value between the train and the station with the distance threshold, it determines whether the distance between the train and the station meets the quantum communication conditions. If the distance between the train and the station is less than or equal to the distance threshold, the distance between the train and the station meets the quantum communication conditions. The station backend server can establish a quantum communication link between the train and the station, allowing the train and the station to communicate through the quantum communication link. If the distance between the train and the station is greater than the distance threshold, the distance between the train and the station does not meet the quantum communication conditions. The station backend server then allocates a common key pair to the train and the station, a private key of the common key pair to the station, and a public key of the common key pair to the train, so that the train can use the public key of the common key pair to encrypt the original train data to obtain the ciphertext of the train data. The train sends the ciphertext of the train data to the station. After receiving the ciphertext of the train data, the station uses the private key of the common key pair to decrypt the ciphertext of the train data. After decryption, the station can obtain the original train data sent by the train.

[0078] If the distance between the train and the station meets the quantum communication conditions, the station backend server establishes a quantum communication link between the train and the station. After the quantum communication link is established, the current position information of the train is obtained again, and the distance between the train and the station is calculated. By comparing the distance between the train and the station with the distance threshold, it is determined whether the quantum communication link is successfully established. If the distance between the train and the station is less than or equal to the distance threshold, the quantum communication link is successfully established; if the distance between the train and the station is greater than the distance threshold, the quantum communication link fails to be established.

[0079] If the quantum communication link fails to establish, the train's backend server continues to calculate the distance between the train and the station in real time until the distance between the train and the station meets the quantum communication conditions, and then re-establishes the quantum communication link between the train and the station. If the quantum communication link is successfully established, the train's backend server distributes quantum keys to the station and the train, assigning the station a private key of the quantum key pair and the train a public key of the quantum key pair. After the station and train obtain the quantum keys assigned by the train's backend server, each party updates their respective keys: the station updates its original private key to the most recently acquired private key, and the station updates its original public key to the most recently acquired public key.

[0080] Furthermore, after the quantum communication link is successfully established, the train backend server determines whether the 400M communication link is successfully established through the wireless communication system. If the 400M communication link is successfully established, the train can use the public key of the quantum key pair to encrypt the original train data to obtain the train data ciphertext. The train can then send the train data ciphertext to the station via the 400M communication link. After receiving the train data ciphertext, the station uses the private key of the quantum key pair to decrypt the train data ciphertext. After decryption, the station can obtain the original train data sent by the train. If the 400M communication link fails to be established, the train backend server re-establishes the 400M communication link through the wireless communication system.

[0081] In the context of 400M wireless communication on railways, a common method for communication between trains and stations is to use wireless communication equipment over a Wi-Fi environment. In the absence of spectrum within stations, using Wi-Fi for wireless communication can lead to excessive noise between trains and stations, poor communication quality, and limited signal transmission distance. Therefore, in this 400M wireless communication environment, trains and stations communicate via quantum communication links, fully accounting for the impact of environmental noise on the communication process. The ability to establish quantum communication between the two stations is determined based on the distance between the trains and the environmental noise. This ensures that the impact of environmental noise on communication quality is minimal during 400M quantum communication between trains and stations.

[0082] Example 5

[0083] Figure 5 This is a schematic diagram of the structure of a wireless communication device provided by the fifth embodiment of the present invention. This embodiment is applicable to situations where both parties communicate via a quantum communication link and use quantum key pairs to encrypt and decrypt communication data. Figure 5 As shown, the course authority control device includes: a communication condition judgment module 510, a communication link construction module 520 and a data ciphertext transmission module 530.

[0084] The communication condition judgment module 510 is used to determine whether the quantum communication conditions between the train and the station are met when there is a communication demand between the train and the station;

[0085] a communication link building module 520 for building a quantum communication link between the train and the station when quantum communication conditions are met between the train and the station, and allocating a quantum public key in a quantum key pair to the train and a quantum private key in a quantum key pair to the station;

[0086] The data ciphertext transmission module 530 is used to control the train to use the quantum public key to encrypt the train data original text to obtain the train data ciphertext, and send the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

[0087] The technical solution provided by the embodiments of the present invention uses environmental noise information and the distance between the train and the station to determine whether quantum communication conditions are met between the train and the station. If the conditions are met, a quantum key pair is assigned to the train and the station, enabling the train and the station to use quantum keys to encrypt and decrypt communication data. This solves the problem of inability to securely and accurately communicate information between the two parties if the key held by one or both parties is stolen during communication. It also addresses the problem of significant interference from environmental noise, which affects data transmission quality, and data transmission is limited by transmission distance when using traditional wireless communication between trains and stations in the absence of spectrum within the station. By using quantum keys to encrypt the original data of the communication information to be transmitted, and leveraging the particle collapse properties of quantum keys, the accuracy and security of data transmission are ensured during the communication process, the selective construction of quantum communication links based on environmental noise and the distance between the train and the station is achieved, ensuring the quality of data transmission during wireless communication over the quantum communication link.

[0088] Exemplarily, the communication condition determination module 510 specifically includes:

[0089] a distance calculation unit, for determining the distance value between the train and the station;

[0090] Environmental noise collection unit, used to collect environmental noise information of the train;

[0091] The communication condition determination unit is used to determine whether the quantum communication conditions between the train and the station are met according to the distance value and the environmental noise information.

[0092] Exemplarily, the communication link building module 520 is further configured to:

[0093] Detecting the link status of a quantum communication link;

[0094] When the link status is normal, the train data ciphertext is sent to the station.

[0095] Exemplarily, the communication link building module 520 is further configured to:

[0096] In the event of an abnormal link status, it is necessary to re-determine whether the quantum communication conditions between the train and the station are met.

[0097] Exemplarily, the above device further includes:

[0098] The quantum key pair generation unit is used to generate quantum key pairs according to the communication protocol between the train and the station.

[0099] Exemplarily, the above-mentioned device further includes: a non-quantum communication module, which is specifically used to:

[0100] If the quantum communication conditions between the train and the station are not met, a non-quantum communication link is established between the train and the station, and a non-quantum public key in a non-quantum key pair is allocated to the train, and a non-quantum private key in a non-quantum key pair is allocated to the station;

[0101] The control train uses the non-quantum public key to encrypt the train data original text to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the non-quantum private key to decrypt the train data ciphertext.

[0102] The wireless communication device provided in this embodiment can be applied to the wireless communication method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0103] Example 6

[0104] Figure 6 A structural diagram of a communication device provided in Example 6 of the present invention is shown in FIG. Figure 6 As shown, the communication device includes a processor 610, a memory 620 and a detector 630; the number of the processor 610 in the communication device can be one or more. Figure 6 In the embodiment, a processor 610 is used as an example; the processor 610, the memory 620 and the detector 630 in the communication device can be connected via a bus or other means. Figure 6 The bus connection is taken as an example. Figure 6 The device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0105] like Figure 6 As shown, the memory 620, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the wireless communication method in the embodiments of the present invention (for example, the communication condition determination module 510, the communication link establishment module 520, and the data ciphertext transmission module 530 in the wireless communication device). The processor 610 executes the software programs, instructions, and modules stored in the memory 620 to execute various functional applications and data processing of the communication device, thereby implementing the above-mentioned wireless communication method.

[0106] The memory 620 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal, etc. In addition, the memory 620 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 620 may further include a memory remotely located relative to the processor 610, and these remote memories may be connected to the communication device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0107] The detector 630 can be used to determine the distance value between the train and the station; collect environmental noise information of the train; and determine whether quantum communication conditions are met between the train and the station based on the distance value and the environmental noise information.

[0108] The communication device provided in this embodiment can be applied to the wireless communication method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0109] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments may be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A wireless communication method, comprising: When there is a communication demand between the train and the station, determine whether the train and the station meet the quantum communication conditions; If the conditions are met, a quantum communication link is established between the train and the station, and the train is assigned a quantum public key from the quantum key pair, and the station is assigned a quantum private key from the quantum key pair; The control train uses the quantum public key to encrypt the train data original text to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext; The step of sending the train data ciphertext to the station includes: Detecting the link status of a quantum communication link; In the case of abnormal link status, it is necessary to re-determine whether the quantum communication conditions between the train and the station are met; When the link status is normal, sending the train data ciphertext to the station; The normal link status means that the distance between the train and the station meets the quantum communication conditions; the abnormal link status means that the distance between the train and the station does not meet the quantum communication conditions.

2. The method according to claim 1, characterized in that Determine whether the conditions for quantum communication between the train and the station are met, including: Determine the distance value between the train and the station; Collect environmental noise information of trains; Whether quantum communication conditions are met between the train and the station is determined according to the distance value and the environmental noise information.

3. The method according to claim 1, characterized in that The quantum key pair is generated according to the communication protocol between the train and the station.

4. The method according to claim 1, wherein Also includes If the quantum communication conditions between the train and the station are not met, a non-quantum communication link is established between the train and the station, and a non-quantum public key in a non-quantum key pair is allocated to the train, and a non-quantum private key in a non-quantum key pair is allocated to the station; The control train uses the non-quantum public key to encrypt the train data original text to obtain the train data ciphertext, and sends the train data ciphertext to the station, so that the station uses the non-quantum private key to decrypt the train data ciphertext.

5. A wireless communication device, characterized in that: include: A communication condition judgment module is used to determine whether the quantum communication conditions between the train and the station are met when there is a communication demand between the train and the station; A communication link building module, used to build a quantum communication link between the train and the station, and to distribute the quantum public key in the quantum key pair to the train and the quantum private key in the quantum key pair to the station; The communication link construction module is further configured to detect the link status of the quantum communication link; if the link status is normal, the train data ciphertext is sent to the station; if the link status is abnormal, whether the quantum communication conditions between the train and the station are met is re-determined; wherein, the normal link status means that the distance between the train and the station meets the quantum communication conditions; the abnormal link status means that the distance between the train and the station does not meet the quantum communication conditions; The data ciphertext transmission module is used to control the train to use the quantum public key to encrypt the train data original text to obtain the train data ciphertext, and send the train data ciphertext to the station, so that the station uses the quantum private key to decrypt the train data ciphertext.

6. The device according to claim 5, characterized in that The communication condition judgment module is specifically used to: Determine the distance value between the train and the station; Collect environmental noise information of trains; Whether quantum communication conditions are met between the train and the station is determined according to the distance value and the environmental noise information.

7. The device according to claim 5, characterized in that The data ciphertext transmission module is specifically used to: Detecting the link status of a quantum communication link; When the link status is normal, the train data ciphertext is sent to the station.

8. A communication device, characterized in that: include: one or more processors; a memory for storing one or more programs; Detector, used to detect whether the quantum communication conditions are met between the train and the station; When the one or more programs are executed by the one or more processors, the one or more processors implement the wireless communication method according to any one of claims 1 to 4.

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