Electric vehicle network communication method and system based on Bluetooth relay

Abstract

The invention relates to the technical field of electric vehicle communication, in particular to an electric vehicle network communication method and system based on Bluetooth relay.The system comprises a processor module, a 4G / 5G communication module, a Bluetooth communication module, a storage module, a network state detection module and a power management module; the processor module serves as a system core and is responsible for controlling each functional module to work and processing data; the 4G / 5G communication module is used for establishing network connection with a server; the Bluetooth communication module supports Bluetooth 5.0 and above protocols and is used for scanning peripheral equipment and establishing near field communication; the storage module is used for storing system configuration information and temporary data; the network state detection module monitors the communication state in real time; the power management module is responsible for power supply control of each module; monitoring communication quality in real time based on a network state evaluation model; selecting a Bluetooth networking stage based on communication quality, and scoring potential relay nodes by using a comprehensive scoring algorithm; and continuously monitoring the communication quality by using a link quality index LQI.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle communication, and in particular to an electric vehicle network communication method and system based on Bluetooth relay. Background Art

[0002] At present, electric vehicles generally use 4G / 5G communication modules to exchange data with servers to achieve functions such as vehicle location tracking, status monitoring and remote control. However, in actual applications, a single vehicle may be disconnected from the server due to weak network signals, communication module failures, etc., affecting the normal monitoring and management of the vehicle.

[0003] Existing solutions mainly focus on improving the communication capabilities of individual vehicles, such as adding signal boosters or supporting multi-operator switching. These solutions are not only costly, but also fail to solve the problem of failure of the communication module itself. With the large-scale deployment of shared electric vehicles, the distance between vehicles is getting closer and closer, which makes it possible to use inter-vehicle communication to achieve network interconnection. Therefore, there is an urgent need for a solution that can fully utilize the short-range communication capabilities between vehicles, so that vehicles with limited network can use normal surrounding vehicles as relay nodes to achieve reliable communication with the server. Summary of the invention

[0004] The purpose of the present invention is to provide an electric vehicle network communication method and system based on Bluetooth relay to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] An electric vehicle network communication system based on Bluetooth relay is applied to a central control system, which includes: a processor module, a 4G / 5G communication module, a Bluetooth communication module, a storage module, a network status detection module and a power management module;

[0007] As the core of the system, the processor module is responsible for controlling the work of each functional module and processing data;

[0008] The 4G / 5G communication module is used to establish a network connection with the server;

[0009] The Bluetooth communication module supports Bluetooth 5.0 and above protocols, which is used to scan surrounding devices and establish short-range communication;

[0010] The storage module is used to save system configuration information and temporary data;

[0011] The network status detection module monitors the communication status in real time;

[0012] The power management module is responsible for the power supply control of each module.

[0013] An electric vehicle network communication method based on Bluetooth relay, the method comprising:

[0014] S100, real-time monitoring of communication quality based on network status assessment model;

[0015] S200, selecting a Bluetooth networking stage based on communication quality, and scoring potential relay nodes using a comprehensive scoring algorithm;

[0016] S300: Continuously monitor communication quality using a link quality index LQI.

[0017] Preferably, S100 includes:

[0018] S101, obtain the network signal during the historical networking process of the electric vehicle, capture the maximum signal strength Smax, the maximum network quality Qmax and the maximum communication error rate Emax respectively, and use the network status evaluation model to monitor the communication quality in real time, and obtain the network status index NSI according to the weighted calculation method formula:

[0019] NSI=w1*(Ss / Smax)+w2*(Qs / Qmax)+w3*(1-Es / Emax);

[0020] Among them, Ss represents the current signal strength, Qs represents the current network quality, Es represents the current communication error rate, and w1, w2, and w3 all represent corresponding weight coefficients;

[0021] S102: Obtain a network status index NSI. When the NSI is lower than a preset threshold, the system automatically starts the Bluetooth networking mechanism.

[0022] Preferably, S200 includes:

[0023] S201. When the system automatically starts the Bluetooth networking mechanism, the system first scans the surrounding electric vehicle equipment with relay function, and calculates the score for each potential relay node through a comprehensive scoring algorithm to obtain a score value Si:

[0024] Si=α*(Bi / Bmax)+β*(Pi / Pmax)+γ*(Ni / Nmax);

[0025] Among them, Bi represents the Bluetooth signal strength, Bmax represents the historical maximum Bluetooth signal strength, Pi represents the current device remaining power percentage, Pmax represents the historical maximum remaining power percentage of the device, Ni represents the current network quality of the potential relay node, Nmax represents the historical maximum network quality of the potential relay node, α, β, γ represent weight coefficients;

[0026] S202, based on the score values ​​Si of each potential relay node, select the node with the highest score and exceeding the minimum score threshold as the main relay node, and designate the node with the second highest score as the backup relay node;

[0027] S203. Establish a connection between the relay node and the system. The system encapsulates the data to be transmitted into a data packet in a specific format, including information such as the source device address, the destination address, and the data type, and encrypts it. The encrypted data is sent to the relay node via the Bluetooth link, and the relay node forwards it to the server through its normally functioning 4G / 5G module.

[0028] Preferably, S300 includes:

[0029] S301, after the relay node establishes a connection with the system, based on the data transmission process, the link quality index LQI is used to continuously monitor the communication quality:

[0030] LQI=λ1*(1-D / Dmax)+λ2*(1-L / Lmax)+λ3*(R / Rmax);

[0031] Where D represents the communication delay, Dmax represents the historical maximum delay, L represents the data packet loss rate, Lmax represents the maximum data packet loss rate, R represents the data transmission rate, and Rmax represents the historical maximum transmission rate.

[0032] S302, based on the link quality index LQI, when the LQI is lower than the threshold, trigger the process of reselecting the relay node, and at the same time, the system introduces a load balancing mechanism;

[0033] S303, when the system is in the load balancing stage, according to the formula: Li = Ci / Cmax+Ti / Tmax; calculate the network load factor Li to prevent a single relay node from being overloaded;

[0034] Among them, Ci represents the number of device connections of the current relay node, Cmax represents the historical maximum number of device connections, Ti represents the cumulative relay time length, and Tmax represents the maximum historical cumulative relay time length.

[0035] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the above-mentioned electric vehicle network communication method and system based on Bluetooth relay.

[0036] A computer device includes a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the program, the steps in the above-mentioned electric vehicle network communication method and system based on Bluetooth relay are implemented.

[0037] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0038] The electric vehicle network communication method based on Bluetooth relay provided by the present invention innovatively applies Bluetooth communication technology to electric vehicle network relay transmission, breaking through the limitation of insufficient coverage of traditional mobile communication networks. An intelligent node scoring mechanism is adopted to comprehensively consider multiple factors such as network signal strength, Bluetooth signal quality, and device status of peripheral devices, and select the optimal relay node for data transmission, which significantly improves the reliability and stability of communication. The system has adaptive characteristics and can automatically determine whether the Bluetooth relay mode needs to be enabled according to the real-time detected network signal strength. This on-demand switching mechanism not only ensures the continuity of communication, but also effectively reduces system energy consumption. The method makes full use of the group advantages in mobile scenarios, and realizes the sharing and optimal utilization of communication resources by establishing a temporary inter-device communication network. It is easy to implement and does not require additional hardware equipment. Function deployment can be achieved only through software upgrades. Through the above technical scheme, the present invention not only solves the communication problem of electric vehicles in special environments, but also provides new technical ideas for building a more complete intelligent transportation network, which has important practical significance and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is a structural diagram of an electric vehicle network communication system based on Bluetooth relay of the present invention;

[0041] Figure 2 It is a flow chart of an electric vehicle network communication method based on Bluetooth relay of the present invention;

[0042] Figure 3 This is a diagram of the installation positions of the instrument and the central control of the electric bicycle of the present invention;

[0043] Figure 4 This is a diagram showing the installation positions of the central control and instruments of the electric scooter of the present invention;

[0044] exist Figure 3 In the middle, 1 is the instrument, 2 is the central control;

[0045] exist Figure 4 In the middle, 1 is the instrument and 2 is the central control. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1-Figure 4 , the present invention provides a technical solution:

[0048] Embodiment 1:

[0049] The present invention provides an electric vehicle network communication method and system based on Bluetooth relay. When the vehicle is in a weak network environment or the communication module is abnormal, it can establish a connection with normal surrounding vehicles through the vehicle-mounted Bluetooth module, and use the communication modules of other vehicles as relay nodes to interact with the server for data, thereby ensuring the normal operation of the vehicle's real-time monitoring and remote management functions. At the same time, through the Bluetooth self-organizing network mechanism between vehicles, the problem of single-vehicle communication failure can be effectively solved, the overall network communication reliability of the fleet can be improved, and the system maintenance cost can be reduced, which is of great significance for improving the operational management efficiency of shared electric vehicles.

[0050] An electric vehicle network communication system based on Bluetooth relay is applied to a central control system, which includes: a processor module, a 4G / 5G communication module, a Bluetooth communication module, a storage module, a network status detection module and a power management module;

[0051] As the core of the system, the processor module is responsible for controlling the work of each functional module and processing data;

[0052] The 4G / 5G communication module is used to establish a network connection with the server;

[0053] The Bluetooth communication module supports Bluetooth 5.0 and above protocols, which is used to scan surrounding devices and establish short-range communication;

[0054] The storage module is used to save system configuration information and temporary data;

[0055] The network status detection module monitors the communication status in real time;

[0056] The power management module is responsible for the power supply control of each module.

[0057] An electric vehicle network communication method based on Bluetooth relay, the method comprising:

[0058] S100, real-time monitoring of communication quality based on network status assessment model;

[0059] Preferably, S100 includes:

[0060] S101, obtain the network signal during the historical networking process of the electric vehicle, capture the maximum signal strength Smax, the maximum network quality Qmax and the maximum communication error rate Emax respectively, and use the network status evaluation model to monitor the communication quality in real time, and obtain the network status index NSI according to the weighted calculation method formula:

[0061] NSI=w1*(Ss / Smax)+w2*(Qs / Qmax)+w3*(1-Es / Emax);

[0062] Among them, Ss represents the current signal strength, Qs represents the current network quality, Es represents the current communication error rate, and w1, w2, and w3 all represent corresponding weight coefficients;

[0063] S102: Obtain a network status index NSI. When the NSI is lower than a preset threshold, the system automatically starts the Bluetooth networking mechanism.

[0064] S200, selecting a Bluetooth networking stage based on communication quality, and scoring potential relay nodes using a comprehensive scoring algorithm;

[0065] Preferably, S200 includes:

[0066] S201. When the system automatically starts the Bluetooth networking mechanism, the system first scans the surrounding electric vehicle equipment with relay function, and calculates the score for each potential relay node through a comprehensive scoring algorithm to obtain a score value Si:

[0067] Si=α*(Bi / Bmax)+β*(Pi / Pmax)+γ*(Ni / Nmax);

[0068] Among them, Bi represents the Bluetooth signal strength, Bmax represents the historical maximum Bluetooth signal strength, Pi represents the current device remaining power percentage, Pmax represents the historical maximum remaining power percentage of the device, Ni represents the current network quality of the potential relay node, Nmax represents the historical maximum network quality of the potential relay node, α, β, γ represent weight coefficients;

[0069] S202, based on the score values ​​Si of each potential relay node, select the node with the highest score and exceeding the minimum score threshold as the main relay node, and designate the node with the second highest score as the backup relay node;

[0070] S203. Establish a connection between the relay node and the system. The system encapsulates the data to be transmitted into a data packet in a specific format, including information such as the source device address, the destination address, and the data type, and encrypts it. The encrypted data is sent to the relay node via the Bluetooth link, and the relay node forwards it to the server through its normally functioning 4G / 5G module.

[0071] S300, continuously monitoring the communication quality using a link quality index LQI;

[0072] Preferably, S300 includes:

[0073] S301, after the relay node establishes a connection with the system, based on the data transmission process, the link quality index LQI is used to continuously monitor the communication quality:

[0074] LQI=λ1*(1-D / Dmax)+λ2*(1-L / Lmax)+λ3*(R / Rmax);

[0075] Where D represents the communication delay, Dmax represents the historical maximum delay, L represents the data packet loss rate, Lmax represents the maximum data packet loss rate, R represents the data transmission rate, and Rmax represents the historical maximum transmission rate.

[0076] S302, based on the link quality index LQI, when the LQI is lower than the threshold, trigger the process of reselecting the relay node, and at the same time, the system introduces a load balancing mechanism;

[0077] S303, when the system is in the load balancing stage, according to the formula: Li = Ci / Cmax+Ti / Tmax; calculate the network load factor Li to prevent a single relay node from being overloaded;

[0078] Among them, Ci represents the number of device connections of the current relay node, Cmax represents the historical maximum number of device connections, Ti represents the cumulative relay time length, and Tmax represents the maximum historical cumulative relay time length.

[0079] In order to prevent data from being illegally intercepted or tampered with, a two-way authentication mechanism and a high-strength encryption algorithm are used to protect data transmission security. When the original network is restored or the relay node needs to be switched, the system can automatically adjust the communication strategy based on various indicators calculated in real time to ensure the continuity and reliability of communication.

[0080] Through the above technical solution, the present invention realizes the intelligent management and reliability improvement of electric vehicle network communication, and provides more stable technical support for fleet management.

[0081] Embodiment 2:

[0082] The computer-readable storage medium of this embodiment stores a computer program thereon, and when the program is executed by a processor, the steps in the electric vehicle network communication method and system based on Bluetooth relay in embodiment 1 are implemented.

[0083] The computer-readable storage medium of this embodiment may be an internal storage unit of the terminal, such as a hard disk or memory of the terminal; the computer-readable storage medium of this embodiment may also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, etc. equipped on the terminal; further, the computer-readable storage medium may also include both an internal storage unit of the terminal and an external storage device.

[0084] The computer-readable storage medium of this embodiment is used to store computer programs and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0085] Embodiment 3:

[0086] The computer device of this embodiment includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of an electric vehicle network communication method and system based on Bluetooth relay in embodiment 1 are implemented.

[0087] In this embodiment, the processor may be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, readily available programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory may also store information about the device type.

[0088] Those skilled in the art will appreciate that the disclosed content of the embodiments may be provided as methods, systems, or computer program products. Therefore, the present solution may adopt the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Moreover, the present solution may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0089] The present solution is described with reference to the method according to the embodiment of the present solution and the flowchart and / or block diagram of the computer program product. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions; these computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 one or more processes and / or methods Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0090] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 one or more processes and / or methods Figure 1 A function specified in one or more boxes.

[0091] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 one or more processes and / or methods Figure 1 The steps for the functions specified in one or more boxes.

[0092] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0093] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric vehicle network communication system based on Bluetooth relay, applied to the central control system, characterized by: The central control system includes: a processor module, a 4G / 5G communication module, a Bluetooth communication module, a storage module, a network status detection module and a power management module; The processor module, as the core of the system, is responsible for controlling the work of each functional module and processing data; The 4G / 5G communication module is used to establish a network connection with the server; The Bluetooth communication module supports Bluetooth 5.0 and above protocols, and is used to scan surrounding devices and establish short-range communication; The storage module is used to store system configuration information and temporary data; The network status detection module monitors the communication status in real time; The power management module is responsible for the power supply control of each module.

2. An electric vehicle network communication method based on Bluetooth relay, characterized in that: The method comprises: S100, real-time monitoring of communication quality based on network status assessment model; S200, selecting a Bluetooth networking stage based on communication quality, and scoring potential relay nodes using a comprehensive scoring algorithm; S300: Continuously monitor communication quality using a link quality index LQI.

3. The electric vehicle network communication method based on Bluetooth relay as claimed in claim 2, characterized in that: The S100 includes: S101, obtain the network signal during the historical networking process of the electric vehicle, capture the maximum signal strength Smax, the maximum network quality Qmax and the maximum communication error rate Emax respectively, and use the network status evaluation model to monitor the communication quality in real time, and obtain the network status index NSI according to the weighted calculation method formula: NSI=w1*(Ss / Smax)+w2*(Qs / Qmax)+w3*(1-Es / Emax); Among them, Ss represents the current signal strength, Qs represents the current network quality, Es represents the current communication error rate, and w1, w2, and w3 all represent corresponding weight coefficients; S102: Obtain a network status index NSI. When the NSI is lower than a preset threshold, the system automatically starts the Bluetooth networking mechanism.

4. The electric vehicle network communication method based on Bluetooth relay as claimed in claim 1, characterized in that: The S200 includes: S201. When the system automatically starts the Bluetooth networking mechanism, the system first scans the surrounding electric vehicle equipment with relay function, and calculates the score for each potential relay node through a comprehensive scoring algorithm to obtain a score value Si: Si=α*(Bi / Bmax)+β*(Pi / Pmax)+γ*(Ni / Nmax); Among them, Bi represents the Bluetooth signal strength, Bmax represents the historical maximum Bluetooth signal strength, Pi represents the current device remaining power percentage, Pmax represents the historical maximum remaining power percentage of the device, Ni represents the current network quality of the potential relay node, Nmax represents the historical maximum network quality of the potential relay node, α, β, γ represent weight coefficients; S202, based on the score values ​​Si of each potential relay node, select the node with the highest score and exceeding the minimum score threshold as the main relay node, and designate the node with the second highest score as the backup relay node; S203. Establish a connection between the relay node and the system. The system encapsulates the data to be transmitted into a data packet in a specific format, including information such as the source device address, the destination address, and the data type, and encrypts it. The encrypted data is sent to the relay node via the Bluetooth link, and the relay node forwards it to the server through its normally functioning 4G / 5G module.

5. The electric vehicle network communication method based on Bluetooth relay as claimed in claim 1, characterized in that: The S300 includes: S301, after the relay node establishes a connection with the system, based on the data transmission process, the link quality index LQI is used to continuously monitor the communication quality: LQI=λ1*(1-D / Dmax)+λ2*(1-L / Lmax)+λ3*(R / Rmax); Where D represents the communication delay, Dmax represents the historical maximum delay, L represents the data packet loss rate, Lmax represents the maximum data packet loss rate, R represents the data transmission rate, and Rmax represents the historical maximum transmission rate. S302, based on the link quality index LQI, when the LQI is lower than the threshold, trigger the process of reselecting the relay node, and at the same time, the system introduces a load balancing mechanism; S303, when the system is in the load balancing stage, according to the formula: Li = Ci / Cmax+Ti / Tmax; calculate the network load factor Li to prevent a single relay node from being overloaded; Among them, Ci represents the number of device connections of the current relay node, Cmax represents the historical maximum number of device connections, Ti represents the cumulative relay time length, and Tmax represents the maximum historical cumulative relay time length.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of an electric vehicle network communication method and system based on Bluetooth relay as described in any one of claims 1 to 5 are implemented.

7. A computer device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the steps of the electric vehicle network communication method and system based on Bluetooth relay as described in any one of claims 1-5 are implemented.

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