Vehicle-mounted dual-mode wireless communication terminal

Abstract

The invention relates to the technical field of wireless communication, in particular to a vehicle-mounted dual-mode wireless communication terminal, which comprises an event response module used for simultaneously sending vehicle-mounted handshake information by a first vehicle-mounted communication module and a second vehicle-mounted communication module according to a response signal and processing a vehicle-mounted response event according to the response signal; and the feedback monitoring module is used for judging whether to trigger vehicle-mounted wireless communication after processing the vehicle-mounted response event, entering a dormant state and waiting for the next response if the wireless communication is not triggered, and judging to trigger the vehicle-mounted wireless communication and monitoring whether vehicle-mounted handshake feedback information is received in real time if the event request is received. By means of the dual-mode design of the first vehicle-mounted communication module and the second vehicle-mounted communication module, the communication module most suitable for the current environment can be flexibly selected for wireless communication, the design can avoid conflicts or interference possibly caused when the two modules work at the same time, and the reliability and efficiency of wireless communication are improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to a vehicle-mounted dual-mode wireless communication terminal. Background Art

[0002] A vehicle-mounted communication module is a hardware device or system module in an automobile for processing wireless communication. It is responsible for implementing communication functions between vehicle-mounted devices, including wireless network connection, information transmission, etc. The vehicle-mounted communication module can support different communication standards (such as Wi-Fi, Bluetooth, 5G, V2X, etc.).

[0003] Traditional vehicle-mounted communication terminals usually rely on a single communication module and cannot automatically switch to the most suitable module for communication according to changes in the environment or communication requirements. This means that in the case of poor signal quality, communication may be unstable, affecting transmission efficiency and reliability; and traditional vehicle-mounted communication terminals do not fully optimize power consumption during long standby periods, and the system continuously consumes energy and cannot enter the sleep state even when there is no effective communication demand, resulting in reduced battery life and low system energy efficiency; and in traditional vehicle-mounted communication terminals, due to the absence of a mechanism for dynamically selecting communication modules, two modules may work simultaneously or switch inappropriately, resulting in signal conflicts or interference. This kind of resource waste will affect the overall communication efficiency and system stability; moreover, traditional vehicle-mounted communication terminals usually cannot predict and adjust the channel state in real time. Therefore, in a complex or changing environment, the signal quality may not be effectively controlled and optimized, resulting in a decline in communication quality; and when traditional vehicle-mounted communication terminals face multiple communication demands and competitive environments, they may not be able to effectively manage and allocate communication resources, resulting in poor concurrent processing capabilities of the system, and there may be delays or packet loss phenomena. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a vehicle-mounted dual-mode wireless communication terminal.

[0005] The technical solution adopted to solve the above technical problem is: A vehicle-mounted dual-mode wireless communication terminal, comprising: An event response module, which is used to simultaneously send vehicle-mounted handshake information by a first vehicle-mounted communication module and a second vehicle-mounted communication module according to a response signal, and process vehicle-mounted response events according to the response signal; A feedback monitoring module, which is used to determine whether vehicle-mounted wireless communication is triggered after processing the vehicle-mounted response event. If wireless communication is not triggered, it enters the sleep state and waits for the next response. If an event request is received, it determines that vehicle-mounted wireless communication is triggered and monitors in real time whether vehicle-mounted handshake feedback information is received; A first selection module, which is configured to, if one of the first vehicle-mounted communication module or the second vehicle-mounted communication module receives the vehicle handshake feedback information, perform wireless communication on the communication module that receives the vehicle handshake feedback information; A second selection module, which is configured to, if both the first vehicle-mounted communication module and the second vehicle-mounted communication module receive the vehicle handshake feedback information, select one of the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication.

[0006] Preferably, the vehicle response events include vehicle status monitoring, emergency event reporting, remote diagnosis requests, firmware upgrades, and vehicle-road collaborative data interaction, and the event requests include vehicle status data sending requests, emergency alarm trigger requests, remote diagnosis response requests, and vehicle-road collaborative interaction requests.

[0007] Preferably, the vehicle handshake information includes first vehicle handshake information and second vehicle handshake information, where the first vehicle handshake information includes a first transmission timestamp, an identity identifier of the first vehicle-mounted communication module, and a unique vehicle identification code, and the second vehicle handshake information includes a second transmission timestamp, an identity identifier of the second vehicle-mounted communication module, and a unique vehicle identification code.

[0008] Preferably, selecting one of the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication includes: Determining the time delay of the first vehicle-mounted communication module and the second vehicle-mounted communication module according to the vehicle handshake information and the vehicle handshake feedback information; Being configured to real-time sense the current channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module; Predicting the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module through the current channel states according to the hybrid Kalman filter to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment; Selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication according to the time delay and the channel states at the next preset moment.

[0009] Preferably, determining the time delay of the first vehicle-mounted communication module and the second vehicle-mounted communication module according to the vehicle handshake information and the vehicle handshake feedback information includes: Judging whether the first vehicle-mounted communication module receives the first vehicle handshake feedback information. If so, recording the first reception timestamp when the first vehicle handshake feedback information is received; Determine whether the second vehicle-mounted communication module receives the second vehicle-mounted handshake feedback message. If so, record the second reception timestamp when the second vehicle-mounted handshake feedback message is received; Determine the first time delay of the first vehicle-mounted communication module according to the first transmission timestamp and the first reception timestamp; Determine the second time delay of the second vehicle-mounted communication module according to the second transmission timestamp and the second reception timestamp.

[0010] Preferably, perform channel state prediction on the first vehicle-mounted communication module and the second vehicle-mounted communication module through the current channel state according to the extended Kalman filter to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment, including: Predict the channel estimation state at the current moment according to the channel state estimation value at the previous preset moment; Correct the channel estimation state at the current moment according to the current channel state to obtain the accurate channel state at the current moment; Adjust the prior estimation error covariance matrix after each correction.

[0011] Preferably, the calculation formula of the signal estimation state is as follows: ; where represents the channel estimation state at the current moment, represents the channel state estimation value at the previous preset moment, represents the state transition matrix, represents the control input matrix, represents the control input at the current moment; The calculation formula of the accurate channel state is as follows: ; where represents the accurate channel state at the current moment, represents the current channel state, represents the Kalman gain matrix, and , represents the observation matrix, represents the prior estimation error covariance matrix, represents the covariance matrix of the observation noise; The adjustment formula of the prior estimation error covariance matrix is as follows: ; where represents the adjusted prior estimation error covariance matrix, represents the identity matrix.

[0012] Preferably, selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module for wireless communication according to the time delay and the channel state at the next preset moment includes: Step 1: Define a discrete state vector according to the time delay and the channel state at the next preset moment, and construct a state space according to the discrete state vector; Step 2: Construct an action space according to selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module; Step 3: Pre-construct a Q-value table structure, wherein the rows of the Q-value table structure represent discrete state vectors, the columns represent actions, and the cells store the expected rewards for selecting the actions in this state; Step 4: Set benchmark values for transmission delay and energy consumption for each action in the action space, and define a reward function according to the delay and energy consumption of the current action; Step 5: Randomly select an action with a preset first probability, select the current optimal action with a preset second probability, for each state-action pair, update the current Q-value according to the reward and the optimal Q-value of the next state, and iterate the above Step 5 until a preset number of iterations is reached.

[0013] The beneficial effects of the present invention are as follows: (1) Through the dual-mode design of the first vehicle-mounted communication module and the second vehicle-mounted communication module, the present invention can flexibly select the most suitable communication module for the current environment for wireless communication. This design can avoid conflicts or interferences that may occur when the two modes work simultaneously, improve the reliability and efficiency of wireless communication, and enter the sleep state when wireless communication is not triggered, avoiding unnecessary energy consumption. When there is no effective communication demand, the system can maintain low power consumption in the waiting state, thereby extending the usage time of the vehicle-mounted system and optimizing the performance; (2) By entering the sleep state when wireless communication is not triggered, the present invention avoids unnecessary energy consumption. When there is no effective communication demand, it can maintain low power consumption in the waiting state, thereby extending the usage time of the vehicle-mounted communication terminal and optimizing the function, and can select the most suitable communication module for data transmission according to the handshake feedback information received by different vehicle-mounted communication modules, avoiding waste of resources and unnecessary signal conflicts. In this way, different signal states (such as signal strength, noise interference, etc.) will be taken into account to ensure an efficient and stable communication connection; (3) Through the dynamic selection of time delay and channel state, the present invention can effectively manage multi-mode communication, reduce competition and collisions, improve the concurrent processing ability, and by combining multiple modules and a real-time monitoring feedback mechanism, it can automatically adjust the communication module or mode when encountering signal interference, enhancing the stability and anti-interference ability of the vehicle-mounted communication terminal in a complex environment. Description of the Drawings

[0014] Figure 1 Schematic diagram of the architecture of an in-vehicle dual-mode wireless communication terminal in an embodiment proposed by the present invention.

[0015] Reference numerals: 1, event response module; 2, feedback monitoring module; 3, first selection module; 4, second selection module. Detailed implementation manners

[0016] Embodiment 1. As Figure 1 shown, an in-vehicle dual-mode wireless communication terminal proposed by the present invention includes: An event response module 1, which is used to simultaneously send vehicle-mounted handshake information to the first vehicle-mounted communication module and the second vehicle-mounted communication module according to a response signal, and process vehicle-mounted response events according to the response signal; A feedback monitoring module 2, which is used to determine whether to trigger vehicle-mounted wireless communication after processing vehicle-mounted response events. If wireless communication is not triggered, it enters a sleep state and waits for the next response. If an event request is received, it determines that vehicle-mounted wireless communication is triggered and monitors in real time whether vehicle-mounted handshake feedback information is received; A first selection module 3, which is used to perform wireless communication on the communication module that receives vehicle-mounted handshake feedback information if one of the first vehicle-mounted communication module or the second vehicle-mounted communication module receives vehicle-mounted handshake feedback information; A second selection module 4, which is used to select one of the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication if both the first vehicle-mounted communication module and the second vehicle-mounted communication module receive vehicle-mounted handshake feedback information.

[0017] In the present invention, the vehicle-mounted communication module is a hardware device or system module in an automobile used to process wireless communication. It is responsible for implementing communication functions between vehicle-mounted devices, including wireless network connection, information transmission, etc.

[0018] Embodiment 2. An in-vehicle dual-mode wireless communication terminal proposed by the present invention. Compared with Embodiment 1, this embodiment further includes: Vehicle-mounted response events include vehicle status monitoring, emergency event reporting, remote diagnosis requests, firmware upgrades, and vehicle-road collaborative data interaction. Event requests include vehicle status data sending requests, emergency alarm trigger requests, remote diagnosis response requests, and vehicle-road collaborative interaction requests.

[0019] In an optional embodiment, the vehicle-mounted handshake information includes first vehicle-mounted handshake information and second vehicle-mounted handshake information. Among them, the first vehicle-mounted handshake information includes a first emission timestamp, an identity identifier of the first vehicle-mounted communication module, and a unique vehicle identification code. The second vehicle-mounted handshake information includes a second emission timestamp, an identity identifier of the second vehicle-mounted communication module, and a unique vehicle identification code.

[0020] In an alternative embodiment, selecting one of the first vehicle-mounted communication module or the second vehicle-mounted communication module for wireless communication includes: Determining the time delays of the first vehicle-mounted communication module and the second vehicle-mounted communication module based on vehicle-mounted handshake information and vehicle-mounted handshake feedback information; For real-time sensing of the current channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module; Performing channel state prediction on the first vehicle-mounted communication module and the second vehicle-mounted communication module based on the current channel states through hybrid Kalman filtering to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment; Selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module for wireless communication based on the time delays and the channel states at the next preset moment.

[0021] It should be noted that the channel state refers to the comprehensive performance of factors such as the quality, interference, and bandwidth of the communication channel. The channel state affects the rate and stability of data transmission and usually needs to be sensed and predicted in real time to optimize communication efficiency.

[0022] In an alternative embodiment, determining the time delays of the first vehicle-mounted communication module and the second vehicle-mounted communication module based on vehicle-mounted handshake information and vehicle-mounted handshake feedback information includes: Judging whether the first vehicle-mounted communication module receives the first vehicle-mounted handshake feedback information. If received, record the first reception timestamp of receiving the first vehicle-mounted handshake feedback information; Judging whether the second vehicle-mounted communication module receives the second vehicle-mounted handshake feedback information. If received, record the second reception timestamp of receiving the second vehicle-mounted handshake feedback information; Determining the first time delay of the first vehicle-mounted communication module based on the first transmission timestamp and the first reception timestamp; Determining the second time delay of the second vehicle-mounted communication module based on the second transmission timestamp and the second reception timestamp.

[0023] In an alternative embodiment, performing channel state prediction on the first vehicle-mounted communication module and the second vehicle-mounted communication module based on the current channel states through hybrid Kalman filtering to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment includes: Predicting the channel estimation state at the current moment based on the channel state estimation value at the previous preset moment; Correcting the channel estimation state at the current moment based on the current channel state to obtain the accurate channel state at the current moment; Adjusting the prior estimation error covariance matrix after each correction.

[0024] It should be noted that the prior estimation error refers to the gap between the estimated value of the channel state obtained based on the previous moment or historical data and the actual channel state before correction. This error usually stems from factors such as signal noise, external interference, and measurement errors.

[0025] In an optional embodiment, the calculation formula for the signal estimation state is as follows: ; Wherein, represents the channel estimation state at the current moment, represents the estimated value of the channel state at the previous preset moment, represents the state transition matrix, represents the control input matrix, represents the control input at the current moment; The calculation formula for the channel precise state is as follows: ; Wherein, represents the channel precise state at the current moment, represents the current channel state, represents the Kalman gain matrix, and , represents the observation matrix, represents the prior estimation error covariance matrix, represents the covariance matrix of the observation noise; The adjustment formula for the prior estimation error covariance matrix is as follows: ; Wherein, represents the adjusted prior estimation error covariance matrix, represents the identity matrix.

[0026] In an optional embodiment, selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module for wireless communication according to the time delay and the channel state at the next preset moment includes: Step 1: Define a discrete state vector according to the time delay and the channel state at the next preset moment, and construct a state space based on the discrete state vector; Step 2: Construct an action space according to the selection of the first vehicle-mounted communication module or the second vehicle-mounted communication module; Step 3: Pre-construct a Q-value table structure, wherein the rows of the Q-value table structure represent the discrete state vectors, the columns represent the actions, and the cells store the expected rewards for selecting actions in that state; Step 4: Set benchmark values for the transmission delay and energy consumption for each action in the action space, and define a reward function according to the delay and energy consumption of the current action; Step 5: Randomly select an action with a preset first probability and select the current optimal action with a preset second probability. For each state-action pair, update the current Q value according to the reward and the optimal Q value of the next state. Iterate the above Step 5 until the preset number of iterations is reached.

[0027] It should be noted that the discrete state vector is the result of discretizing the state of the system (such as channel quality, transmission delay, etc.). Through discretization, the continuous system state can be transformed into a finite set of states, which is convenient for making decisions and calculations in reinforcement learning; the action space refers to the set of all possible actions that the agent can choose. In a vehicle-mounted communication system, the action space may include selecting different communication modules; the Q-value table is a data structure in reinforcement learning used to store the expected rewards (Q-values) of each state-action pair. Its rows represent different discrete state vectors, and its columns represent different actions. Each cell stores the expected reward obtained by selecting a certain action in that state, which is used to guide the agent to make decisions; the expected reward refers to the reward that the agent can obtain when given a state and an action. This value is used to measure the effect of this action during the reinforcement learning process and guide the learning agent to select the optimal behavior strategy; probabilistic action selection means selecting an action according to a preset probability, usually used for exploration or exploitation. In reinforcement learning, the contradiction between exploring new actions and selecting the current optimal action can be balanced through probability; Q-value update refers to adjusting the current Q value through the reward of each action and the optimal Q value of the next state. The common update method is to use the Bellman equation. In this way, the agent can gradually adjust its decision-making strategy until the optimal strategy is found.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art to which the present invention pertains.

Claims

1. A vehicle-mounted dual-mode wireless communication terminal, characterized in that, Including: An event response module (1), which is used to simultaneously send vehicle-mounted handshake information according to a response signal by a first vehicle-mounted communication module and a second vehicle-mounted communication module, and process vehicle-mounted response events according to the response signal; A feedback monitoring module (2), which is used to determine whether to trigger vehicle-mounted wireless communication after processing the vehicle-mounted response event. If wireless communication is not triggered, it enters a sleep state and waits for the next response. If an event request is received, it determines that vehicle-mounted wireless communication is triggered and monitors in real time whether vehicle-mounted handshake feedback information is received; A first selection module (3), which is used to, if one of the first vehicle-mounted communication module or the second vehicle-mounted communication module receives the vehicle-mounted handshake feedback information, perform wireless communication by the communication module that receives the vehicle-mounted handshake feedback information; A second selection module (4), which is used to, if both the first vehicle-mounted communication module and the second vehicle-mounted communication module receive the vehicle-mounted handshake feedback information, select one of the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication.

2. The vehicle-mounted dual-mode wireless communication terminal according to claim 1, characterized in that, The vehicle-mounted response events include vehicle status monitoring, emergency event reporting, remote diagnosis requests, firmware upgrades, and vehicle-road collaborative data interaction, and the event requests include vehicle status data sending requests, emergency alarm trigger requests, remote diagnosis response requests, and vehicle-road collaborative interaction requests.

3. The vehicle-mounted dual-mode wireless communication terminal according to claim 2, wherein The vehicle-mounted handshake information includes first vehicle-mounted handshake information and second vehicle-mounted handshake information. Among them, the first vehicle-mounted handshake information includes a first emission timestamp, a first vehicle-mounted communication module identity identifier, and a vehicle unique identification code, and the second vehicle-mounted handshake information includes a second emission timestamp, a second vehicle-mounted communication module identity identifier, and a vehicle unique identification code.

4. The vehicle-mounted dual-mode wireless communication terminal according to claim 3, characterized in that, Selecting one of the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication includes: Determining the time delay between the first vehicle-mounted communication module and the second vehicle-mounted communication module according to the vehicle-mounted handshake information and the vehicle-mounted handshake feedback information; Being used to sense in real time the current channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module; Performing channel state prediction on the first vehicle-mounted communication module and the second vehicle-mounted communication module through the current channel states according to a hybrid Kalman filter to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment; Selecting the first vehicle-mounted communication module or the second vehicle-mounted communication module to perform wireless communication according to the time delay and the channel states at the next preset moment.

5. A vehicle-mounted dual-mode wireless communication terminal according to claim 4, characterized in that, Determining the time delay between the first vehicle-mounted communication module and the second vehicle-mounted communication module according to the vehicle-mounted handshake information and the vehicle-mounted handshake feedback information includes: Judging whether the first vehicle-mounted communication module receives first vehicle-mounted handshake feedback information. If it receives it, record the first reception timestamp of receiving the first vehicle-mounted handshake feedback information; Determine whether the second vehicle-mounted communication module receives the second vehicle-mounted handshake feedback information. If received, record the second reception timestamp when the second vehicle-mounted handshake feedback information is received; Determine the first time delay of the first vehicle-mounted communication module according to the first transmission timestamp and the first reception timestamp; Determine the second time delay of the second vehicle-mounted communication module according to the second transmission timestamp and the second reception timestamp.

6. The vehicle-mounted dual-mode wireless communication terminal according to claim 5, characterized in that, Perform channel state prediction on the first vehicle-mounted communication module and the second vehicle-mounted communication module through the current channel state according to the extended Kalman filter to obtain the channel states of the first vehicle-mounted communication module and the second vehicle-mounted communication module at the next preset moment, including: Predict the channel estimation state at the current moment according to the channel state estimation value at the previous preset moment; Correct the channel estimation state at the current moment according to the current channel state to obtain the channel accurate state at the current moment; Adjust the prior estimation error covariance matrix after each correction.

7. The vehicle-mounted dual-mode wireless communication terminal according to claim 6, wherein The calculation formula of the signal estimation state is as follows: ； Among them, represents the channel estimation state at the current moment, represents the channel state estimation value at the previous preset moment, represents the state transition matrix, represents the control input matrix, represents the control input at the current moment; The calculation formula of the channel accurate state is as follows: ； Among them, represents the accurate channel state at the current moment, represents the current channel state, represents the Kalman gain matrix, and , represents the observation matrix, represents the prior estimation error covariance matrix, represents the covariance matrix of the observation noise; The adjustment formula of the prior estimation error covariance matrix is as follows: ； Among them, represents the adjusted prior estimation error covariance matrix, represents the identity matrix.

8. The vehicle-mounted dual-mode wireless communication terminal according to claim 7, characterized in that, Select the first vehicle-mounted communication module or the second vehicle-mounted communication module for wireless communication according to the time delay and the channel state at the next preset moment, including: Step 1: Define a discrete state vector according to the time delay and the channel state at the next preset moment, and construct a state space according to the discrete state vector; Step 2: Construct an action space according to the selection of the first vehicle-mounted communication module or the second vehicle-mounted communication module; Step 3: Pre-construct a Q-value table structure, where the rows of the Q-value table structure represent discrete state vectors, the columns represent actions, and the cells store the expected rewards for selecting the actions in this state; Step 4: Set benchmark values for the transmission delay and energy consumption for each action in the action space, and define a reward function according to the delay and energy consumption of the current action; Step 5: Randomly select an action with a preset first probability and select the current optimal action with a preset second probability. For each state-action pair, update the current Q value according to the reward and the optimal Q value of the next state, and iterate the above Step 5 until the preset number of iterations is reached.

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