Vehicle-mounted communication terminal and low-power consumption control method

Abstract

The application relates to the technical field of vehicle-mounted communication terminals, in particular to a kind of vehicle-mounted communication terminal and low-power control method.The method includes that MPU detects operation executed by main control module and vehicle state in working mode;if main control module does not execute remote communication operation within a set time length from current time and the vehicle state meets the requirement of light sleep, enter light sleep mode, one module of SAT Module and XG is in low-power sleep, another module is powered off, and MPU enters low-power sleep;MPU enters working mode in response to wake-up signal sent by at least one wake-up source.The application sets light sleep mode entering scheme and wake-up scheme, so that vehicle-mounted communication terminal realizes low power consumption under some set conditions.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted communication terminal technology, and more specifically, to a vehicle-mounted communication terminal and a low-power control method. Background Technology

[0002] As the only public network interface for intelligent connected vehicles, the vehicle terminal T-BOX needs to handle remote control, over-the-air (OTA) technology, and other tasks, and therefore needs to maintain several wake-up sources even after the vehicle is powered off.

[0003] For example, patent 201810698046.3 provides a system and low-power algorithm for an intelligent in-vehicle T-BOX. Its wake-up sources include ignition signals, a G-sensor (accelerometer), and remote control. The number of wake-up sources is relatively small, and the low-power algorithm is relatively simple. However, as the number of wake-up sources increases, traditional T-BOX control algorithms can no longer achieve the desired low-power performance. Therefore, ensuring the low-power requirements of the T-BOX itself and the entire vehicle when multiple wake-up sources exist is a problem that urgently needs to be solved.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an in-vehicle communication terminal and a low-power control method, which sets up a shallow rest mode entry scheme and a wake-up scheme, enabling the in-vehicle communication terminal to achieve low power consumption under certain set conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a low-power control method for an in-vehicle communication terminal, which is applied to an in-vehicle communication terminal, the in-vehicle communication terminal including a main control module, a satellite module, a cellular network module, an emergency communication module and multiple wake-up sources;

[0008] The low-power control method for the vehicle-mounted communication terminal includes:

[0009] In working mode, the main control module monitors the operations performed by the main control module and the vehicle status in real time.

[0010] If, within a set time period, the main control module has not performed a remote communication operation and the vehicle status meets the shallow rest requirement, the main control module controls the vehicle communication terminal to enter the shallow rest mode. In the shallow rest mode, one of the satellite module and the cellular network module goes into low-power sleep mode, the other module is powered off, and the main control module enters low-power sleep mode.

[0011] The main control module responds to a wake-up signal sent by at least one wake-up source and controls the vehicle communication terminal to enter the working mode from the rest mode. In the working mode, the main control module, the satellite module, and the cellular network module are working.

[0012] Secondly, the present invention provides a vehicle-mounted communication terminal, comprising: a main control module, a satellite module, a cellular network module, and multiple wake-up sources;

[0013] The main control module is used to execute a low-power control method for any vehicle-mounted communication terminal.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) The vehicle communication terminal provided by the present invention includes a satellite module and a cellular network module, so that it can communicate with the outside world through satellite signals and cellular signals, and can extend the communication range of the vehicle to the world. Even in areas without cellular network coverage, it can communicate with the outside world through satellite network.

[0016] (2) The present invention provides a new shallow sleep mode. In the shallow sleep mode, the satellite module or cellular network module enters low power sleep mode and the MPU enters low power sleep mode. That is, when the MPU and communication module (satellite module or cellular network module) are in low power sleep mode, they can still be woken up according to satellite signals or cellular network signals to respond to remote commands in a timely manner. At the same time, one communication module is powered off, which further reduces power consumption.

[0017] (3) The present invention provides a solution for entering the shallow rest mode from the working mode. If the main control module does not perform remote communication operation within the historically set time and the vehicle status meets the shallow rest requirements, then the shallow rest mode is entered, thereby reducing the power consumption of the MPU and communication module when the aforementioned conditions are met. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a flowchart illustrating the low-power control method for the vehicle-mounted communication terminal provided by the present invention.

[0020] Figure 2 This is a schematic diagram illustrating the switching of multiple modes provided by the present invention;

[0021] Figure 3This is a schematic diagram of the structure of the vehicle-mounted communication terminal provided by the present invention. Detailed Implementation

[0022] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0023] Example 1

[0024] Figure 1 This is a flowchart illustrating a low-power control method for an in-vehicle communication terminal provided in this embodiment. This embodiment is applicable to situations where the operating state of an in-vehicle communication terminal (T-BOX) needs to be controlled. This method can be executed by a microprocessor unit (MPU) in the in-vehicle communication terminal.

[0025] For ease of introduction Figure 1 The provided low-power control method first describes the structure of the vehicle-mounted communication terminal. The vehicle-mounted communication terminal includes a main control module (MPU), a satellite module (SAT Module), a cellular network module (XG), an emergency communication module, and multiple wake-up sources.

[0026] The MPU, as the control core of the in-vehicle communication terminal, is responsible for low-power control, data forwarding, and data storage control. The XG cellular network module can be either 4G or 5G. The SAT Module, in conjunction with the 5G cellular module, extends the vehicle's communication range globally, enabling communication with the outside world via satellite networks even in areas without cellular network coverage.

[0027] The emergency communication module consists of a voice submodule, a passive safety submodule (hardwired and CAN collision message for the Controller Area Network), and an active safety submodule (SOS button trigger signal). It enables users to make emergency calls and automatically connect to the nearest emergency response center. Specifically, the emergency communication module allows users to make calls via Ecall (Emergency) and Bcall (Breakdown).

[0028] Optional wake-up sources include: SAT Module, XG, real-time clock, Controller Area Network (CAN) / Local Internet of Things (LIN) bus, ignition switch, accelerometer, passive safety submodule, and Bluetooth LE module. The Bluetooth LE module is responsible for the Bluetooth digital key function. The passive safety submodule provides CAN-formatted collision signals.

[0029] like Figure 1 As shown, this embodiment provides a low-power control method for an in-vehicle communication terminal, including the following steps:

[0030] In working mode, the S110 and MPU monitor the operations performed by the main control module and the vehicle status in real time.

[0031] Specifically, it monitors in real time the cellular and satellite network data received or transmitted by the MPU, the CAN bus status, the ignition switch position, the main power supply voltage, and whether emergency roadside assistance is being provided through the emergency communication module.

[0032] The functions provided by the MPU vary depending on the scenario. To easily distinguish the different functions of the MPU, different modes are assigned to the in-vehicle communication terminal. See also Figure 2 In operating mode, the MPU, XG, and SAT Module all function. The MPU can receive or transmit satellite data via the SAT Module and cellular data via the XG. It also provides Bluetooth digital key functionality for in-vehicle communication networks, remote control, and OTA (Over-the-Air Technology) services.

[0033] The CAN bus has a sleep state and a normal state. In sleep state, the CAN bus does not transmit information.

[0034] The ignition switch has three positions. KLR indicates the first position (accessory mode). KLR represents the ACC mode of the vehicle's power supply, i.e., accessory mode, in which some vehicle functions, such as the radio, can be used normally. KL15 indicates the second position (on). KL15 is a power mode of the vehicle system that is activated when the engine / electric motor is started (running), covering functions such as starting, air conditioning, and window operation. KL50 corresponds to the third position (on).

[0035] The main power supply is used to power the vehicle-mounted communication terminal. The main power supply voltage indicates the operating status of the main power supply.

[0036] The availability of emergency roadside assistance is determined by detecting whether an Ecall / Bcall has been issued.

[0037] S120. If, within a set time period from the current moment, the main control module has not performed a remote communication operation and the vehicle status meets the short rest requirement, the MPU controls the vehicle communication terminal to enter the short rest mode.

[0038] Specifically, if the main control module has not received or sent cellular network data and satellite network data within a set time period from the current moment, the controller local area network bus is in sleep mode, the ignition switch is off, the main power supply voltage is within the set normal range, and no emergency roadside assistance has been performed, the main control module controls the vehicle communication terminal to enter a short-term rest mode.

[0039] The set duration can be determined according to business needs, for example, 3 minutes. The ignition switch is in the KL15 OFF state. The main power supply voltage is within the normal set range and can normally supply power to the vehicle communication terminal, without any issues of insufficient high or low voltage power supply.

[0040] It should be noted that "not providing emergency roadside assistance" here includes: not making an Ecall / Bcall within the set time period from the current moment; or, making an Ecall / Bcall and maintaining a working mode for a certain period of time (5-10 minutes recommended) after the call ends, and if there is no call back within this 5-10 minute period, it is considered that no emergency roadside assistance has been provided, and the system will enter a short rest mode to maintain low power consumption.

[0041] In the shallow sleep mode, one of the SAT Module and XG modules goes into low-power sleep mode while the other module is powered down, and the MPU enters low-power sleep mode. That is, the SAT Module and MPU go into low-power sleep mode while the XG is powered down; or the XG and MPU go into low-power sleep mode while the SAT Module is powered down. Taking 5G as an example, in 5G low-power sleep mode, the network operates on a 4G standard, maintaining basic heartbeat communication with the base station, responding to ringing and SMS messages, while other functions are disabled. From the input end, the static power consumption is approximately 12V, 1mA~2mA. In SAT Module low-power sleep mode, the network operates in the S-band, maintaining basic heartbeat communication with satellites and ground stations, responding to ringing and SMS messages, while other functions are disabled. From the input end, the static power consumption is approximately 12V, 3mA~8mA. The MPU enters an ultra-low-power mode when there are no output / output IO interrupts; these IO interrupts include KL15, real-time clock, CAN / LIN messages, accelerometer signals, and Bluetooth keys; in ultra-low power mode, the MPU power consumption is around 100uA.

[0042] S130 and MPU respond to a wake-up signal sent by at least one wake-up source and control the vehicle communication terminal to enter the working mode from the rest mode.

[0043] Wake-up signals include: satellite SMS and satellite ringing provided by the SAT Module, cellular ringing and cellular SMS provided by the XG, timing signals provided by the real-time clock, wake-up messages (such as CAN specific frames) provided by the CAN / LIN bus, the position of the ignition switch, signals from the accelerometer, collision signals provided by the passive safety submodule, and Bluetooth digital keys provided by the Bluetooth module.

[0044] When the MPU enters working mode from shallow rest mode, it powers on the modules that were powered off in shallow rest mode, and the low-power modules resume normal operation.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] (1) The vehicle communication terminal provided by the present invention includes a satellite module and a cellular network module, so that it can communicate with the outside world through satellite signals and cellular signals, and can extend the communication range of the vehicle to the world. Even in areas without cellular network coverage, it can communicate with the outside world through satellite network.

[0047] (2) The present invention provides a new shallow sleep mode. In the shallow sleep mode, the satellite module or cellular network module enters low power sleep mode and the MPU enters low power sleep mode. That is, when the MPU and communication module (satellite module or cellular network module) are in low power sleep mode, they can still be woken up according to satellite signals or cellular network signals to respond to remote commands in a timely manner. At the same time, one communication module is powered off, which further reduces power consumption.

[0048] (3) The present invention provides a solution for entering the shallow rest mode from the working mode. If the main control module does not perform remote communication operation within the historically set time and the vehicle status meets the shallow rest requirements, then the shallow rest mode is entered, thereby reducing the power consumption of the MPU and communication module when the aforementioned conditions are met.

[0049] (4) This embodiment specifically details the requirements for switching from working mode to short rest mode. That is, if the main control module does not receive or send cellular network data and satellite network data within a set time period from the current time, the controller LAN bus is in sleep mode, the ignition switch is off, the main power supply voltage is within the set normal range, and no emergency road rescue is carried out, then when the main control module has not communicated remotely for a long time and the vehicle CAN bus and voltage conditions cannot support normal operation, it enters short rest mode to save energy.

[0050] Example 2

[0051] This embodiment, based on the above embodiments, provides a detailed description of the shallow rest mode. Specifically, the shallow rest mode includes cellular network mode and satellite network mode. The MPU controls the vehicle communication terminal to enter the shallow rest mode, including:

[0052] The MPU identifies the cellular network subscriber identification card (SIM card), detects the cellular network signal strength (Call Setup Quality, CSQ), and reads the pre-set communication type. Users can pre-set their preferred communication type in sleep mode via the central control screen, such as XG communication or satellite communication.

[0053] If a user identification card (SIM card) is detected, the signal strength is greater than a set value (e.g., 10 dBμV / m), and the communication type is cellular network, then the MPU controls the vehicle communication terminal to enter cellular network mode. In cellular network mode, the XG enters low-power sleep mode, the SAT Module is powered down, and the wake-up sources for the MPU include the XG, real-time clock, CAN / LIN bus, ignition switch, accelerometer, passive safety submodule, and Bluetooth module. It does not respond to satellite SMS or satellite ringing. Therefore, the MPU can respond to wake-up signals sent by these wake-up sources and transition from cellular network mode to operating mode.

[0054] If the user identification card is not detected, or the signal strength is not greater than a set strength value, or the communication type is satellite network (i.e., not all three conditions are met simultaneously), the MPU controls the vehicle communication terminal to enter satellite network mode. In satellite network mode, the SAT Module enters low-power sleep mode, the XG is powered down, and the wake-up sources that the MPU responds to include the SAT Module, real-time clock, CAN / LIN bus, ignition switch, accelerometer, passive safety submodule, and Bluetooth module; that is, it does not respond to cellular SMS and cellular ringing. Therefore, the MPU can respond to the wake-up signals sent by these wake-up sources and enter the working mode from satellite network mode.

[0055] Furthermore, the SAT Module uses the S-band high-orbit frequency band during low-power sleep mode. The S-band has lower power consumption compared to other frequency bands.

[0056] It should be noted that, regardless of whether it is cellular network mode or satellite network mode, a judgment needs to be made before entering the shallow rest mode, that is, to determine which method of remote control will be used. Accordingly, the conditions for entering the shallow rest mode must be met at the same time: no cellular network data or satellite network data has been received or sent within the set time period from the current time, the CAN bus is in sleep mode, the ignition switch is off, the main power supply voltage is within the set normal range, and no emergency roadside assistance has been performed.

[0057] This embodiment specifies in detail whether cellular network hibernation or satellite network hibernation occurs in shallow rest mode, so that the appropriate remote control method can be selected based on SIM card status, signal strength, and pre-set network conditions.

[0058] Example 3

[0059] This embodiment is based on the above embodiments, combined with Figure 2 Improve the various modes of the vehicle-mounted communication terminal. Specifically, the vehicle-mounted communication terminal includes working mode, deep rest mode, shallow rest mode, and storage mode. The working mode includes normal working mode, maintenance mode, factory mode, and display vehicle mode.

[0060] First, we will introduce the switching scheme from light rest / work mode to deep rest mode, and from deep rest mode to work mode:

[0061] When the MPU exceeds the set standby time in shallow rest mode, it controls the vehicle communication terminal to enter deep rest mode. Specifically, the shallow rest mode is timed using a real-time clock. The set standby time can be determined according to business needs, for example, 7 days. In deep rest mode, the XG and SAT Modules are powered down, thereby disabling cellular and satellite network access; the MPU goes into sleep mode.

[0062] In operating mode, if the MPU detects that the main power supply voltage exceeds the high voltage threshold, or that the main power supply voltage is below the low voltage threshold and switches to the backup battery to complete data retransmission, it controls the vehicle communication terminal to enter deep sleep mode from operating mode. The high voltage threshold is determined based on the upper limit of voltage the main power supply can withstand, for example, 20V. If the high voltage threshold is exceeded, the main power supply may be damaged, potentially even damaging the modules of the vehicle communication terminal. The low voltage threshold can be 6V. When the main power supply is below the low voltage threshold, it will switch to the backup battery due to insufficient power supply. Specifically, there are three scenarios: 1. In operating mode, if the main power supply voltage exceeds the high voltage threshold for 3 seconds, it will be forced to enter deep sleep mode. 2. In operating mode, if the main power supply voltage is below the low voltage threshold, and no emergency roadside assistance is provided within a set time (e.g., 1 minute) after switching to the backup battery, and data retransmission is completed within a set time (e.g., 10 minutes) before the backup battery runs out of power, it will enter deep sleep mode. Data retransmission is a disaster recovery mechanism to ensure that after a vehicle malfunction or accident, the vehicle communication terminal can transmit the last data to the cloud and paging station via the backup battery. 3. In working mode, if the main power supply voltage is lower than the low voltage threshold, and there is emergency roadside assistance within a set time (e.g., 1 minute) after switching to the backup battery and the emergency roadside assistance ends, and the data is retransmitted within a set time (e.g., 10 minutes) before the backup battery runs out of power, the system will enter deep rest mode.

[0063] In deep sleep mode, the MPU responds to timing signals provided by the real-time clock, wake-up messages provided by the CAN / LIN bus, the ignition switch position (KL15 On), signals from the accelerometer, collision signals provided by the passive safety submodule, and the Bluetooth digital key provided by the Bluetooth module, and detects the main power supply voltage (KL30 On state). If the main power supply voltage is within the set normal range, it controls the vehicle communication terminal to enter the working mode. Since the XG and SAT Modules are powered down, it no longer responds to satellite ringing, satellite phone, cellular ringing, and cellular phone wake-up calls.

[0064] The deep sleep mode provided in this embodiment disables the remote control function, further reducing power consumption compared to shallow sleep; at the same time, deep sleep can also respond to some wake-up signals to enter the working mode, ensuring the normal provision of necessary functions.

[0065] Next, we will introduce the switching scheme from deep rest mode / shallow rest mode / working mode to warehousing mode, and from warehousing mode to working mode:

[0066] In shallow or deep rest mode, if the MPU detects that the vehicle communication terminal is disconnected from the main power supply (i.e., KL30 is removed) and the backup battery is not working, meaning the vehicle communication terminal cannot receive power, it will control the vehicle communication terminal to switch from shallow or deep rest mode to storage mode. In storage mode, the entire unit will be shut down.

[0067] In operating mode, the MPU detects that the vehicle communication terminal is disconnected from the main power supply (i.e., KL30 is removed) and the backup battery is not working, or the vehicle communication terminal is disconnected from the main power supply, has not received or transmitted cellular network data and satellite network data within a set time period from the current moment, the CAN bus is in sleep mode, the ignition switch is off and the battery is switched to the backup battery to complete data retransmission, and controls the vehicle communication terminal to enter storage mode from operating mode. Specifically, there are three situations: 1. The vehicle communication terminal is disconnected from the main power supply (i.e., KL30 is removed) and the backup battery is not working, entering storage mode. 2. The following conditions are met simultaneously: the vehicle communication terminal is disconnected from the main power supply, has not received or transmitted cellular network data and satellite network data within a set time period (e.g., 3 minutes) from the current moment, the CAN bus is in sleep mode, the ignition switch is off and the battery is switched to the backup battery, and data retransmission is completed within a set time period (e.g., 10 minutes) before the battery is depleted, entering storage mode.

[0068] In storage mode, the MPU detects that the vehicle communication terminal is connected to the main power supply (i.e., KL30 On) and that the main power supply voltage is within the set normal range, and controls the vehicle communication terminal to switch from storage mode to working mode.

[0069] This embodiment sets a series of conditions, from working mode, deep rest mode, shallow rest mode to storage mode, so that data can be resent and the whole machine can be shut down when power is unavailable, thus realizing the safety of the vehicle communication terminal.

[0070] Next, we will introduce the switching scheme between the normal working mode, maintenance mode, factory mode, and display vehicle mode:

[0071] In normal operating mode, the MPU responds to a vehicle display mode command, controlling the onboard communication terminal to switch from normal operating mode to vehicle display mode. In vehicle display mode, the emergency roadside assistance function is disabled, while other functions operate normally. In vehicle display mode, the MPU responds to a vehicle display mode deactivation command, controlling the onboard communication terminal to switch from vehicle display mode back to normal operating mode and restoring the emergency roadside assistance function. The vehicle display mode command and the vehicle display mode deactivation command are sent by SOME IP. SOME IP stands for Scalable service-oriented middleware over IP, which is a service-oriented scalable communication middleware protocol based on the IP protocol.

[0072] In normal operating mode, the MPU responds to diagnostic commands or maintenance mode commands, controlling the on-board communication terminal to enter maintenance mode from normal operating mode. In maintenance mode, emergency roadside assistance and remote control functions are disabled, maintenance notifications are sent to the TSP (Telematics Service Provider), and other functions remain normal. Diagnostic commands can be sent from the diagnostic tool to the MPU, while maintenance mode commands are sent to the MPU via SOME IP.

[0073] In maintenance mode, the MPU responds to the command to exit maintenance mode or the vehicle speed is greater than a set speed value (e.g., 30km / h) by controlling the on-board communication terminal to enter normal operation mode from maintenance mode, and simultaneously reports to TSP; wherein, the command to exit maintenance mode is sent to the MPU by SOME IP.

[0074] Vehicles leaving the factory are in factory mode by default, in which fault reporting is disabled. Fault reporting is restored when the vehicle rolls off the assembly line (i.e., the vehicle has finished production). Specifically, in factory mode, the MPU responds to the command to exit assembly line diagnostics by controlling the on-board communication terminal to switch from factory mode to normal operating mode and restore fault reporting. The command to exit assembly line diagnostics is sent to the MPU by SOME IP.

[0075] This embodiment provides a display mode, maintenance mode, factory mode, and normal operation mode. These rich modes facilitate the use of the vehicle in display, maintenance, and factory scenarios. By disabling some functions in the corresponding scenarios, the overall power consumption of the device is reduced.

[0076] Example 4

[0077] This embodiment provides a vehicle-mounted communication terminal, including: a main control module (MPU), a satellite module (SAT Module), a cellular network module (XG), and multiple wake-up sources; the MPU is used for the low-power control methods of the vehicle-mounted communication terminals provided in embodiments 1 to 3. The multiple wake-up sources include: the SAT Module, the XG, a real-time clock, a CAN / LIN bus, an ignition switch, an accelerometer, a passive safety submodule, and a Bluetooth module.

[0078] Further, see Figure 3 The vehicle-mounted communication terminal also includes: a mobile hotspot WIFI module, an antenna module, a vehicle wireless communication technology V2X module, a CAN module (including CANFD), a LIN module, an Ethernet photoelectric sensor, an emergency communication module, flash memory, a hardware security module, a power supply module, an audio output and power amplifier module, and connectors.

[0079] The WIFI module, when paired with an XG (e.g., 5G) module, enables in-vehicle CPE (Customer Premises Equipment) functionality, providing in-vehicle WIFI data. It can also be configured in STA mode (a working mode in wireless networks), allowing for over-the-air (OTA) data transfer services via WIFI in areas with high data costs. The WIFI module interacts with the XG+ positioning and navigation module via a Secure Digital Input / Output (SDIO) interface.

[0080] The satellite module, in conjunction with the 5G module, extends the vehicle's communication range globally, enabling communication with the outside world even in areas without cellular network coverage. The satellite module interacts with the MPU via the PCIe serial bus.

[0081] The antenna module includes an active phased array antenna (APAA) suitable for low-Earth orbit satellite communication, a V2X antenna, a 5G antenna, and a positioning antenna. The positioning antenna includes various GNSS (Global Navigation Satellite System) standards and frequency bands. The active phased array antenna implementation methods of this invention include, but are not limited to, independent antenna turntables, glass antennas, and wire-clamped antennas.

[0082] The V2X module is responsible for vehicle-to-infrastructure (V2I) and vehicle-to-person (V2P) communication. Based on the four V2X applications (V2V, V2I, V2N, V2P) defined by 3GPP, four further V2X scenarios are defined: platooning, sensor sharing, advanced driver assistance, and remote driving, all of which have very high requirements for communication latency. Therefore, in road scenarios, roadside units, vehicles, and people communicate via the 5G PC5 interface. Communication based on this interface is also known as Sidelink, a D2D (device-to-device) communication technology that can be extended to 4G / 5G network coverage. The V2X module interacts with the MPU via the Serial Peripheral Interface (SPI).

[0083] The Bluetooth module is responsible for the Bluetooth digital key function and exchanges data with the MPU via Universal Asynchronous Receiver / Transmitter (UART).

[0084] The real-time clock, along with the accelerometer, SMS, ringtone, Bluetooth key, collision signal, and CAN / LIN wake-up message, constitutes the wake-up source for the MPU.

[0085] The CAN module, LIN module, and Ethernet optoelectronic converter interface with the in-vehicle communication network to carry data traffic for services such as wake-up, remote control, and OTA remote upgrades.

[0086] The emergency communication module consists of a voice submodule, a passive safety submodule (hard wire and CAN collision message) and an active safety submodule (SOS button trigger signal), enabling users to make distress calls and automatically connect to the nearest emergency response center in emergency situations.

[0087] The XG+ positioning and navigation module includes an XG module and a GNSS module. The GNSS module supports vehicle navigation and positioning functions. The XG+ positioning and navigation module exchanges data with the MPU via a serial peripheral interface (SPI) and a universal serial bus (USB).

[0088] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0089] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A low power consumption control method of a vehicle-mounted communication terminal, characterized by comprising: An application to vehicle-mounted communication terminals, characterized in that the vehicle-mounted communication terminal includes a main control module, a satellite module, a cellular network module, an emergency communication module, and multiple wake-up sources; The low-power control method for the vehicle-mounted communication terminal includes: In working mode, the main control module monitors the operations performed by the main control module and the vehicle status in real time. If, within a set time period from the current moment, the main control module has not performed a remote communication operation and the vehicle status meets the shallow rest requirement, the main control module controls the vehicle communication terminal to enter the shallow rest mode. In the shallow rest mode, one of the satellite module and the cellular network module goes into low-power sleep mode, the other module is powered off, and the main control module enters low-power sleep mode. The shallow rest mode includes cellular network mode and satellite network mode. The main control module controls the vehicle-mounted communication terminal to enter a shallow rest mode, including: The main control module identifies the user identification card of the cellular network, detects the signal strength of the cellular network, and reads the pre-set communication type; If the user identification card is detected, the signal strength is greater than a set strength value, and the communication type is cellular network, the main control module controls the vehicle communication terminal to enter the cellular network mode. In the cellular network mode, the cellular network module enters low-power sleep mode, the satellite module is powered down, and the wake-up sources responded by the main control module include the cellular network module, real-time clock, controller area network / local interconnection network bus, ignition switch, accelerometer, passive safety submodule, and Bluetooth module. If the user identification card is not detected, or the signal strength is greater than a set value, or the communication type is satellite network, the main control module controls the vehicle communication terminal to enter the satellite network mode. In the satellite network mode, the satellite module enters low-power sleep mode, the cellular network module is powered down, and the wake-up sources of the main control module include the satellite module, real-time clock, controller LAN / LAN bus, ignition switch, accelerometer, passive safety submodule, and Bluetooth module. In 5G low-power sleep mode, the network operates in 4G mode, maintaining basic heartbeat communication with the base station and responding to ringing and SMS messages; in SATModule low-power sleep mode, the network operates in the S-band, maintaining basic heartbeat communication with satellites and ground stations and responding to ringing and SMS messages. The main control module responds to a wake-up signal sent by at least one wake-up source and controls the vehicle communication terminal to enter the working mode from the rest mode. In the working mode, the main control module, the satellite module, and the cellular network module work. In shallow or deep rest mode, the main control module detects that the vehicle communication terminal is disconnected from the main power supply and the backup battery is not working, and controls the vehicle communication terminal to enter the storage mode from shallow or deep rest mode; in the storage mode, the whole machine is turned off. In normal operating mode, the main control module responds to the vehicle display mode command and controls the vehicle communication terminal to switch from normal operating mode to vehicle display mode. In vehicle display mode, the emergency roadside assistance function is turned off. In normal operating mode, the main control module responds to diagnostic commands or maintenance mode commands to control the vehicle communication terminal to enter maintenance mode from normal operating mode; in maintenance mode, the emergency roadside assistance function and remote control function are turned off.

2. The method according to claim 1, characterized in that, The multiple wake-up sources include: a satellite module, a cellular network module, a real-time clock, a controller area network / local interconnection network bus, an ignition switch, an accelerometer, a passive safety submodule, and a Bluetooth module; If, within a set time period regressing from the current moment, the main control module has not performed a remote communication operation and the vehicle status meets the short-term rest requirement, the main control module controls the vehicle communication terminal to enter the short-term rest mode, including: If, within a set time period from the current moment, the main control module has not received or sent cellular network data or satellite network data, the controller local area network bus is in sleep mode, the ignition switch is off, the main power supply voltage is within the set normal range, and no emergency roadside assistance has been provided, the main control module controls the vehicle communication terminal to enter a short-term rest mode.

3. The method according to claim 2, characterized in that, When the satellite module is in low-power sleep mode, it uses the S-band high-orbit frequency band.

4. The method according to claim 1, characterized in that, Also includes: When the main control module exceeds the set standby time in shallow rest mode, it controls the vehicle communication terminal to enter deep rest mode. In the deep sleep mode, the cellular network module and satellite module are powered down, and the main control module goes into sleep mode; In the working mode, if the main control module detects that the main power supply voltage exceeds the high voltage threshold, or the main power supply voltage is lower than the low voltage threshold and switches to the backup battery and completes data retransmission, it controls the vehicle communication terminal to enter the deep rest mode from the working mode.

5. The method according to claim 1, characterized in that, Also includes: In deep rest mode, the main control module responds to the timing signal provided by the real-time clock, the wake-up message provided by the controller LAN / LAN bus, the position of the ignition switch, the signal from the acceleration sensor, the collision signal provided by the passive safety submodule, and the Bluetooth digital key provided by the Bluetooth module, and detects the main power supply voltage. If the main power supply voltage is within the set normal range, control the vehicle communication terminal to enter the working mode.

6. The method according to claim 1, characterized in that, Also includes: In the working mode, the main control module detects that the vehicle communication terminal is disconnected from the main power supply and the backup battery is not working, or the vehicle communication terminal is disconnected from the main power supply, has not received or sent the cellular network data and satellite network data within a set time period from the current moment, the controller local area network bus is in sleep mode, the ignition switch is turned off and switched to the backup battery to complete the data retransmission, and controls the vehicle communication terminal to enter the storage mode from the working mode; In storage mode, the main control module detects that the vehicle communication terminal is connected to the main power supply and that the main power supply voltage is within the set normal range, and controls the vehicle communication terminal to switch from storage mode to working mode.

7. The method according to claim 1, characterized in that, The working modes include normal working mode and vehicle display mode; The method further includes: In the display vehicle mode, the main control module responds to the command to deactivate the display vehicle mode, controls the vehicle communication terminal to enter the normal working mode from the display vehicle mode, and restores the emergency roadside assistance function.

8. The method according to claim 1, characterized in that, The operating modes include normal operating mode, maintenance mode, and factory mode; The method further includes: In the maintenance mode, the main control module responds to the command to exit maintenance mode or the vehicle speed is greater than a set speed value, and controls the vehicle communication terminal to enter normal working mode from maintenance mode; In the factory mode, in response to the command to exit the final assembly line diagnostics, the main control module controls the vehicle communication terminal to enter the normal working mode from the factory mode, and in the factory mode, the fault reporting function is turned off.

9. A vehicle-mounted communication terminal, characterized in that, include: Main control module, satellite module, cellular network module and multiple wake-up sources; The main control module is used to execute the low-power control method of the vehicle communication terminal according to any one of claims 1-8.

10. The vehicle-mounted communication terminal according to claim 9, characterized in that, The multiple wake-up sources include: a satellite module, a cellular network module, a real-time clock, a controller area network / local interconnection network bus, an ignition switch, an accelerometer, a passive safety submodule, and a Bluetooth module; The vehicle-mounted communication terminal also includes: a mobile hotspot module, an antenna module, a vehicle wireless communication technology module, a Bluetooth module, a controller area network module, a local area network module, an Ethernet photoelectric sensor, and an emergency communication module; the emergency communication module includes a passive safety submodule.

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