Aircraft comprehensive monitoring method based on bus data

Abstract

The invention discloses an aircraft comprehensive monitoring method based on bus data, and the method comprises the following steps: S1, collecting the bus data in real time in a control computer of an aircraft, and then carrying out the analysis and classification of the bus data; s2, in a control computer of the aircraft, generating a data packet for each type of data obtained by classification, and adding a timestamp for the data packet; s3, M data transmission channels are arranged between the aircraft and the ground monitoring station, and an auxiliary encryption platform is arranged on the ground and used for providing a random encryption sequence for the aircraft and the ground monitoring station; for each data packet, determining a transmission mode of the data packet in a control computer of the aircraft according to a classification result, and transmitting the data packet to a ground monitoring station according to the determined transmission mode; and S4, the ground monitoring station carries out comprehensive monitoring on the aircraft according to the received data packet. According to the invention, through the random encryption sequence provided by the auxiliary encryption platform, data with a high confidentiality level in the aircraft can be effectively protected.

Description

Technical Field

[0001] The present invention relates to the field of aircraft monitoring, and particularly to an integrated aircraft monitoring method based on bus data. Background Art

[0002] During the operation of an aircraft, it is often necessary to monitor the aircraft in real time to ensure its normal operation at all times. Generally speaking, for aircraft monitoring, the bus data of the aircraft needs to be transmitted to the ground monitoring station, and the ground monitoring station monitors the status of the aircraft in real time. However, due to the different confidentiality levels of aircraft equipment, the data of some equipment does not need to be particularly confidential and can be directly transmitted. However, for the data of some other equipment in the aircraft, it may involve confidential information of the aircraft. If it is directly transmitted and intercepted, it will cause the leakage of confidential information. Summary of the Invention

[0003] An object of the present invention is to overcome the deficiencies of the prior art and provide an integrated aircraft monitoring method based on bus data, which can effectively protect the data with a higher confidentiality level in the aircraft through the random encryption sequence provided by the auxiliary encryption platform.

[0004] The object of the present invention is achieved by the following technical solutions: An integrated aircraft monitoring method based on bus data, comprising the following steps: S1. In the control computer of the aircraft, the bus data is collected in real time, and then the bus data is parsed and classified. S2. In the control computer of the aircraft, a data packet is generated for each category of data obtained by classification, and a time stamp is added to the data packet. S3. Suppose there are M data transmission channels between the aircraft and the ground monitoring station, and an auxiliary encryption platform is set on the ground to provide a random encryption sequence for the aircraft and the ground monitoring station. For each data packet, in the control computer of the aircraft, according to the classification result, the transmission method of the data packet is determined, and the data packet is transmitted to the ground monitoring station according to the determined transmission method. S4. The ground monitoring station comprehensively monitors the aircraft according to the received data packets.

[0005] The beneficial effects of the present invention are as follows: Through the random encryption sequence provided by the auxiliary encryption platform, the data with a higher confidentiality level in the aircraft can be effectively protected. Even if the confidential data is intercepted, it is difficult to decipher. At the same time, complex encryption and decryption algorithms are not required, and the random encryption sequence is updated once every fixed time (generally 30 - 60 s), further improving the confidentiality of the data. Description of the Drawings

[0006] Figure 1This is the flowchart of the method of the present invention. Specific embodiments

[0007] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0008] As Figure 1 shown, an integrated monitoring method for an aircraft based on bus data includes the following steps: S1. In the control computer of the aircraft, the bus data is collected in real time, and then the bus data is parsed and classified. The parsing and classification of the bus data in step S1 includes: Parse the bus data to obtain the data of each device in the aircraft included in the bus data; Classify the bus data according to the device type: In the control computer of the aircraft, the confidentiality levels of each device in the aircraft are preset, and the confidentiality level of each device is used as the confidentiality level of the data of the device; The data of each device with the same confidentiality level is used as a type of data to complete the classification of the aircraft bus data.

[0009] The confidentiality levels are represented by numbers 1 to N, and the larger the number, the higher the confidentiality level, where N represents the total number of confidentiality levels.

[0010] S2. In the control computer of the aircraft, generate a data packet for each type of classified data. S3. Assume that there are M data transmission channels between the aircraft and the ground monitoring station, and an auxiliary encryption platform is set up on the ground to provide a random encryption sequence for the aircraft and the ground monitoring station; for each data packet, in the control computer of the aircraft, determine the transmission method of the data packet according to the classification result, and transmit it to the ground monitoring station according to the determined transmission method. Step S3 includes: S301. The auxiliary encryption platform generates numbers 1 to K, and then randomly selects from the generated numbers to obtain a random encryption sequence: the random selection includes randomly selecting a number from the generated numbers as the first number of the random encryption sequence, and then randomly selecting a number from the unselected numbers as the second number of the random encryption sequence, and repeating the random selection until the selection of the Kth number is completed; S302. The auxiliary encryption platform repeats step S301 at fixed intervals to update the random encryption sequence, and transmits the updated random encryption sequence to the aircraft and the ground communication station in real time after each update. S303. For any data packet, in the control computer of the aircraft, first compare the security level of the data packet with a preset security level threshold: If the security level is not greater than the preset security level threshold, select a data transmission channel with the fewest allocated data packets from the M data transmission channels as the transmission channel for this data packet; if there are multiple channels with the fewest allocated data packets among the M data transmission channels, randomly select one data transmission channel from the multiple channels with the fewest allocated data packets; If the security level is greater than the preset security level threshold, go to step S304; S304. Evenly divide the current data packet into K data blocks, number the data blocks from 1 to K, and then encrypt and reorganize the K data blocks according to the currently received random encryption sequence to obtain the reorganized data packet: A1. Let the i-th number in the random encryption sequence be j, then the data block numbered j is used as the i-th data block in the reorganized data packet; where j takes a number in 1, 2, …, K; A2. When i = 1, 2, …, K, repeat step A1, that is, according to the numbers in the random encryption sequence, the rearrangement of the K data blocks is completed; In the embodiment of the present application, assume K = 5 (generally, K should be a number greater than 30 to ensure the encryption effect, and 5 here is only for explaining the encryption principle). If the encryption sequence is 35142, then after reorganization, the data block numbered 3 is used as the 1st data block, the data block numbered 5 is used as the 2nd data block, the data block numbered 1 is used as the 3rd data block, the data block numbered 4 is used as the 4th data block, and the data block numbered 2 is used as the 5th data block; A3. Concatenate the rearranged data blocks to obtain the reorganized data packet, and add a reorganization label, where the reorganization label is generally a preset symbol used to distinguish whether the data packet is reorganized; A4. Select a data transmission channel with the fewest allocated data packets from the M data transmission channels as the transmission channel for the reorganized data packet; if there are multiple channels with the fewest allocated data packets among the M data transmission channels, randomly select one data transmission channel from the multiple channels with the fewest allocated data packets as the transmission channel for the reorganized data packet; S305. For each data packet, repeat steps S304~S304; complete the channel allocation for all data packets; S306. The control computer of the aircraft transmits each data packet to the ground monitoring station according to the allocated data transmission channels.

[0011] S4. The ground monitoring station comprehensively monitors the aircraft according to the received data packets.

[0012] The said step S4 includes: S401. After the ground monitoring station receives the data packets transmitted by the aircraft, it first identifies the reorganized data packets according to whether there is a reorganization label; S402. For each reorganized data packet, the ground monitoring station restores the data packet: The reorganized data packet is evenly divided into K data blocks, and K rearranged data blocks are restored; According to the currently received random encryption sequence, restore the K rearranged data blocks: B1. Let the i-th number in the random encryption sequence be j, then the i-th rearranged data block is used as the j-th data block after restoration; where j takes a number in 1, 2,..., K; B3. When i = 1, 2,..., K, repeat step B1 to achieve the restoration of all data blocks; In the above embodiment, the reorganization situation has been illustrated with K = 5 and the encryption sequence being 35142. Then, on this basis, during the restoration process, since the first number in the encryption sequence is 3, therefore, the first rearranged data block is used as the 3rd data block after restoration, the second rearranged data block is used as the 5th data block after restoration, the third rearranged data block is used as the 1st data block after restoration, the fourth rearranged data block is used as the 4th data block after restoration, and the fifth rearranged data block is used as the 2nd data block after restoration; it can be clearly seen that the numbers of the data blocks are restored to the arrangement of 1, 2, 3, 4, 5, that is, the restoration is completed; In the actual execution process, the value of K is generally relatively large, and the actual operation has stronger encryption ability, but the principle remains the same; B4. Stitch the restored data blocks to obtain the restored data packet; S403. The ground monitoring station analyzes and displays the data packets without the reorganization label and the restored data packets to achieve the comprehensive monitoring of the aircraft.

[0013] The above is the preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments. Instead, it can be used in other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in related fields. And the changes and alterations made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. An integrated monitoring method for an aircraft based on bus data, characterized in that: Including the following steps: S1. In the control computer of the aircraft, collect the bus data in real time, and then parse and classify the bus data; S2. In the control computer of the aircraft, generate a data packet for each category of data obtained by classification; S3. Assume that there are M data transmission channels between the aircraft and the ground monitoring station, and an auxiliary encryption platform is set up on the ground to provide a random encryption sequence for the aircraft and the ground monitoring station; for each data packet, in the control computer of the aircraft, determine the transmission method of the data packet according to the classification result, and transmit it to the ground monitoring station according to the determined transmission method; S4. The ground monitoring station comprehensively monitors the aircraft according to the received data packet.

2. The integrated monitoring method for an aircraft based on bus data according to claim 1, characterized in that: The parsing and classification of the bus data in step S1 include: Parse the bus data to obtain the data of each device in the aircraft included in the bus data; Classify the bus data according to the device type: In the control computer of the aircraft, the security level of each device in the aircraft is preset in advance, and the security level of each device is used as the security level of the data of the device; Take the device data of each security level as a category of data to complete the classification of the aircraft bus data.

3. The integrated monitoring method for an aircraft based on bus data according to claim 1, characterized in that: The security level is represented by numbers 1 to N, and the larger the number, the higher the security level, where N represents the total number of security levels.

4. A method for comprehensive monitoring of an aircraft based on bus data according to claim 1, characterized in that: Step S3 includes: S301. The auxiliary encryption platform generates numbers 1 to K, and then randomly selects the generated numbers to obtain a random encryption sequence: the random selection includes randomly selecting a number from the generated numbers as the first number of the random encryption sequence, and then randomly selecting a number from the unselected numbers as the second number of the random encryption sequence, and repeating the random selection until the selection of the Kth number is completed; S302. The auxiliary encryption platform repeats step S301 at fixed intervals to update the random encryption sequence, and transmits the updated random encryption sequence to the aircraft and the ground communication station in real time after each update; S303. For any data packet, in the control computer of the aircraft, first compare the security level of the data packet with a preset security level threshold: If the security level is not greater than the preset security level threshold, select a data transmission channel with the fewest allocated data packets among the M data transmission channels as the transmission channel of the data packet; if there are multiple channels with the fewest allocated data packets among the M data transmission channels, randomly select one data transmission channel from the multiple channels with the fewest allocated data packets; If the security level is greater than the preset security level threshold, go to step S304; S304. Evenly divide the current data packet into K data blocks, number the data blocks from 1 to K, and then encrypt and reorganize the K data blocks according to the currently received random encryption sequence to obtain the reorganized data packet: A1. Let the i-th number in the random encryption sequence be j, then the data block numbered j is used as the i-th data block in the reorganized data packet; where j takes a number among 1, 2,..., K; A2. When \(i = 1, 2, \ldots, K\), step A1 is repeatedly executed, that is, according to the numbers in the random encryption sequence, the rearrangement of \(K\) data blocks is completed; A3. The rearranged data blocks are spliced to obtain a reorganized data packet, and a reorganization label is added. Generally, the reorganization label is a preset symbol used to distinguish whether the data packet is reorganized; A4. Select a data transmission channel with the fewest allocated data packets from \(M\) data transmission channels as the transmission channel for the reorganized data packet; if there are multiple channels with the fewest allocated data packets among the \(M\) data transmission channels, then randomly select one data transmission channel from the multiple channels with the fewest allocated data packets as the transmission channel for the reorganized data packet; S305. For each data packet, step S304~S304 is repeatedly executed; the channel allocation for all data packets is completed; S306. The control computer of the aircraft transmits each data packet to the ground monitoring station according to the allocated data transmission channels.

5. The integrated monitoring method for an aircraft based on bus data according to claim 4, wherein: The said step S4 includes: S401. After the ground monitoring station receives the data packet transmitted by the aircraft, it first identifies the reorganized data packet according to whether there is a reorganization label; S402. The ground monitoring station performs data packet restoration for each reorganized data packet: The reorganized data packet is evenly divided into \(K\) data blocks to restore \(K\) rearranged data blocks; According to the currently received random encryption sequence, the \(K\) rearranged data blocks are restored: B1. Let the \(i\)-th number in the random encryption sequence be \(j\), then the \(i\)-th rearranged data block is used as the \(j\)-th data block after restoration; where \(j\) takes a number in \(1, 2, \ldots, K\); B3. When \(i = 1, 2, \ldots, K\), step B1 is repeatedly executed to realize the restoration of all data blocks; B4. The restored data blocks are spliced to obtain the restored data packet; S403. The ground monitoring station parses and displays the data packets without reorganization labels and the restored data packets to realize the comprehensive monitoring of the aircraft.

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