In-vehicle unit, mobile device, and control method

Abstract

The application provides a vehicle-mounted unit, a mobile device and a control method. The vehicle-mounted unit comprises a first SIM, a second SIM, a main processor, a modem, a radio frequency switch module and an antenna module. The first SIM and the second SIM are electrically connected to the main processor. The main processor is also electrically connected to the modem. The modem is electrically connected to the radio frequency switch module and the antenna module. The main processor selects the first SIM and / or the second SIM to make a call to generate a corresponding baseband signal. The baseband signal is output to the modem. The modem is used to convert the baseband signal into a corresponding radio frequency signal and output the radio frequency signal to the radio frequency switch module for external emission via the antenna module. The vehicle-mounted unit provided by the application has a wider network coverage range to ensure a higher success rate of emergency calls.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile devices, in particular to an on-board unit, a mobile device and a control method. BACKGROUND

[0002] With the rapid development of the automotive industry, the number of cars in use continues to increase, at the same time, the number of car accidents is also increasing. Thus, the European Union launched a kind of vehicle emergency call (E-Call) system, and timely send out a distress signal. E-Call system is a kind of on-board technology system based on satellite positioning technology and mobile communication network. After the accident, the E-Call system communicates with the rescue center through the on-board unit (OBU) to send out a distress signal.

[0003] However, due to the existing on-board unit is mostly selected by single card communication, if the vehicle travels to the operator signal coverage area, it cannot get timely rescue when needed. And the external antenna in the existing on-board unit is easy to fall off after the vehicle accident, thereby affecting the communication between the on-board unit and the rescue center. SUMMARY

[0004] In order to solve at least one of the above problems, it is necessary to provide an on-board unit, a mobile device and a control method to solve at least one of the above problems.

[0005] The first aspect of the present application provides an on-board unit for establishing a communication connection with a rescue center, the on-board unit comprising a first subscriber identity module, a second subscriber identity module, a main processor, a modem, a radio frequency switch module and an antenna module, the first subscriber identity module and the second subscriber identity module are electrically connected to the main processor, the main processor is also electrically connected to the modem, the modem is electrically connected to the radio frequency switch module and the antenna module, wherein the main processor selects the first subscriber identity module and / or the second subscriber identity module to make a call to generate a corresponding baseband signal, and outputs the baseband signal to the modem, the modem is used to convert the baseband signal into a corresponding radio frequency signal, and outputs the radio frequency signal to the radio frequency switch module to be transmitted outwardly via the antenna module.

[0006] The second aspect of the present application provides a mobile device comprising the on-board unit as described above.

[0007] The third aspect of the present application further provides a control method applied to the on-board unit as described above, the control method comprising the following steps:

[0008] S1: detecting whether at least one antenna in the antenna module is in a normal state;

[0009] S2: When at least one antenna in the antenna module is in a normal state and the emergency call function is triggered, according to the selection of the first SIM and the second SIM, the radio frequency switch module is controlled to switch to output a distress signal by using the antenna in the normal state.

[0010] The vehicle-mounted unit provided in the application has the first SIM and the second SIM, so that a wider network coverage range is obtained, and the call success rate of the vehicle-mounted unit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 FIG. 1 is a schematic diagram of a prior art vehicle-mounted unit.

[0012] Figure 2 FIG. 2 is a schematic diagram of a movable device provided with the vehicle-mounted unit and communicating with a rescue center according to an embodiment of the application.

[0013] Figure 3 FIG. 3 is a structural block diagram of the vehicle-mounted unit according to an embodiment of the application.

[0014] Figure 4 FIG. 4 is a partial circuit structure schematic diagram of the vehicle-mounted unit according to an embodiment of the application.

[0015] Figure 5 FIG. 5 is a schematic diagram of the vehicle-mounted unit according to an embodiment of the application.

[0016] Figure 6 FIG. 6 is a flowchart of a control method according to an embodiment of the application.

[0017] MAIN ELEMENT SYMBOL EXPLANATION

[0018] Movable device 1

[0019] Vehicle-mounted unit 10

[0020] Housing 101

[0021] First subscriber identity module (first SIM) 11

[0022] Second subscriber identity module (second SIM) 12

[0023] Main processor 13

[0024] Modem 14

[0025] Radio frequency switch module 15

[0026] First radio frequency switch 151

[0027] Second radio frequency switch 152

[0028] Third radio frequency switch 153

[0029] Antenna module 16

[0030] First antenna 161

[0031] Second antenna 162

[0032] Third antenna 163

[0033] Microprocessor 17

[0034] Positioning module 18

[0035] Airbag module 19

[0036] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0038] It should be noted that when an element is referred to as being "electrically connected" to another element, it can be directly on the other component or there can be intervening elements. When an element is referred to as being "electrically connected" to another element, it can be a contact connection, for example, it can be a wire connection, or it can be a non-contact connection, for example, it can be a non-contact coupling.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] With the rapid development of the automotive industry, the number of cars on the road continues to increase, and at the same time, the number of car accidents is also increasing. Therefore, the European Union launched a kind of vehicle emergency call (E-Call) system to send a distress signal in time. The E-Call system is a kind of vehicle technology system based on satellite positioning technology and mobile communication network. After the vehicle accident, the E-Call system communicates with the rescue center through the on board unit (OBU) to send a distress signal.

[0042] After the vehicle accident, the E-Call system will automatically dial the emergency rescue phone or other rescue center, and timely transmit the rescue related data to the rescue center, and help the passengers establish voice contact with the rescue center.

[0043] The conventional E-Call system communicates with the rescue center through the on board unit (OBU) arranged in the vehicle. In order to better receive signals, the on board unit is usually installed in the center console area of the vehicle. And the antenna in the on board unit is led out to the best receiving position outside the on board unit shell through a long radio frequency cable (see Figure 1 However, in this design, after the vehicle accident, the antenna may be detached or the connecting cable may be broken due to collision or body deformation, at which time the on board unit will not be able to establish a call connection with the rescue center, which will result in that the passengers in the vehicle cannot get timely and effective rescue.

[0044] In addition, due to cost considerations, the on board unit usually uses single card communication. If the vehicle travels to an area without signal coverage of the operator, it is also impossible to get timely rescue when needed.

[0045] Therefore, please refer to Figure 2 The application provides an on board unit 10 which can be applied to a movable device 1 such as a smart car, a fuel car, a forklift, a movable smart home device, or a movable smart city device, to solve at least one of the above problems.

[0046] In this embodiment, the on board unit 10 is applied to a smart car as an example to describe the structure and specific working process of the on board unit 10.

[0047] The on board unit 10 provided by the embodiment of the application can communicate with the rescue center 2 to send the rescue related information of the movable device 1 to the rescue center 2 and perform voice communication with the rescue center 2.

[0048] Please continue to refer to Figure 3In the embodiment, the vehicle-mounted unit 10 comprises at least a first Subscriber Identity Module (SIM, hereinafter referred to as first SIM) 11, a second SIM (hereinafter referred to as second SIM) 12, a main processor 13, a modem 14, a radio frequency switch module 15, an antenna module 16, and a microprocessor 17.

[0049] The radio frequency switch module 15 comprises a plurality of radio frequency switches, and the antenna module 16 comprises a plurality of antennas. It can be understood that, in some embodiments, the vehicle-mounted unit 10 further comprises a storage or a prompt module (such as an LED light or a voice module), etc. The first SIM 11, the second SIM 12, the main processor 13, the modem 14, the radio frequency switch module 15, the microprocessor 17, and the storage, etc. can be integrated in the same housing 101 (as shown in FIG. 1) to form the vehicle-mounted unit 10. The antenna module 16 can be arranged in the housing 101 of the vehicle-mounted unit 10 and / or outside the housing 101. Figure 5 ) of the vehicle-mounted unit 10.

[0050] It can be understood that the vehicle-mounted unit 10 can support a plurality of Radio Access Technologies (RATs). For example, the vehicle-mounted unit 10 can be configured to communicate using any of a variety of RATs, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access (CDMA, such as CDMA2000 IXRTT or other CDMA radio access technologies), Long Term Evolution (LTE), LTE-Advanced (LTE-A), 5th Generation Mobile Communication Technology (5G), and / or two or more of other RATs. For example, the vehicle-mounted unit 10 can support at least two radio access technologies, such as LTE and 5G. The vehicle-mounted unit 10 can also support various different or other RATs as desired.

[0051] In the embodiment, the first SIM 11 and the second SIM 12 are electrically connected to the main processor 13, and the main processor 13 is electrically connected to the modem 14. It can be understood that the SIM stores user information, encryption keys, etc., which can be used for the corresponding network to identify the user identity and encrypt the voice information during the user's call. The vehicle-mounted unit 10 can subscribe to network services from a telecommunications operator through the SIM (such as the first SIM 11 and the second SIM 11). For example, in the embodiment, the vehicle-mounted unit 10 can subscribe to a first network connection service and a second network connection service from a telecommunications operator through the first SIM 11 and the second SIM 12, respectively.

[0052] It can be understood that the main processor 13 is configured to manage the first SIM 11 and the second SIM 12, and to process data to generate corresponding baseband digital signals. For example, in the embodiment, the main processor 13 can use the first SIM 11 and / or the second SIM 12 to make a call, so as to receive uplink data packets related to services of the first SIM 11 and / or the second SIM 12, and process the uplink data packets into baseband signals and output to the modem 14.

[0053] It can be understood that, in the embodiment, the first SIM 11 is configured to communicate via a first network, and the second SIM 12 is configured to communicate via a second network. The first network and the second network are respectively provided by different telecommunication operators. In this way, compared with the existing single-card communication vehicle-mounted unit, the vehicle-mounted unit 10 can support network services of different telecommunication operators at the same time, obtain a wider network coverage range, and can switch to another network in time when a problem occurs in one of the networks, thereby improving the call success rate and having a greater opportunity to send a distress signal to a rescue center.

[0054] It can be understood that, in other embodiments, the vehicle-mounted unit 10 can also subscribe to network services of the same telecommunication operator through the first SIM 11 and the second SIM 12.

[0055] In the embodiment, the modem 14 is further electrically connected to the radio frequency switch module 15, and the radio frequency switch module 15 is electrically connected to the antenna module 16. It can be understood that, after receiving the baseband signals output by the main processor 13, the modem 14 can modulate the baseband signals into corresponding radio frequency signals under the control of the main processor 13, and output the radio frequency signals to the radio frequency switch module 15 for emission via the antenna module 16.

[0056] In the embodiment, the modem 14 supports a dual-card dual-active (DSDA) technology to realize a function of simultaneously using the first SIM 11 and the second SIM 12 for calling by the vehicle-mounted unit 10, so as to ensure the probability of successful emergency call.

[0057] It can be understood that, in the embodiment, the antenna module 16 can also receive radio frequency signals and transmit the radio frequency signals to the modem 14 via the radio frequency switch module 15, so as to demodulate the radio frequency signals into corresponding baseband signals and transmit the baseband signals to the main processor 13, thereby obtaining corresponding information.

[0058] In the embodiment, the main processor 13 is also electrically connected to the microprocessor 17, and the microprocessor 17 is also electrically connected to the radio frequency switch module 15. In this way, the main processor 13 can control the radio frequency switch module 15 to switch through the microprocessor 17 to establish a corresponding radio frequency path. The microprocessor 17 is also electrically connected to each antenna in the antenna module 16, so that the main processor 13 can detect the working state of each antenna in the antenna module 16 through the microprocessor 17, so as to timely adjust the radio frequency path to ensure that the vehicle-mounted unit 10 can timely output a distress signal.

[0059] In the embodiment, the main processor 13 is electrically connected to the microprocessor 17 through a universal asynchronous receiver / transmitter (UART) to output selection information of the first SIM 11 and the second SIM 12 to the microprocessor 17. In this way, the microprocessor 17 controls the radio frequency switch module 15 to switch according to the selection of the first SIM 11 and the second SIM 12 to form a corresponding radio frequency path. For example, in the embodiment, the main processor 13 can select the first SIM 11 or the second SIM 12 to call alone. The main processor 13 can also select the first SIM 11 and the second SIM 12 to call at the same time. When the main processor 13 detects that one of the first SIM 11 and the second SIM 12 is abnormal, the main processor 13 can switch to select the other one of the first SIM 11 and the second SIM 12 that is not abnormal to call.

[0060] It can be understood that please continue to refer to Figure 4 In the embodiment, the radio frequency switch module 15 includes a first radio frequency switch 151, a second radio frequency switch 152, and a third radio frequency switch 153. In the embodiment, the microprocessor 17 is electrically connected to the first radio frequency switch 151, the second radio frequency switch 152, and the third radio frequency switch 153 to control the switching of the first radio frequency switch 151, the second radio frequency switch 152, and the third radio frequency switch 153, respectively, according to the selection of the SIM (such as the first SIM 11 and the second SIM 12) by the main processor 13, so as to form a corresponding radio frequency path to output a radio frequency signal to the antenna module 16.

[0061] In the embodiment, the first radio frequency switch 151, the second radio frequency switch 152 and the third radio frequency switch 153 are all single-pole double-throw switches. That is, in the embodiment, the first radio frequency switch 151, the second radio frequency switch 152 and the third radio frequency switch 153 all include a moving terminal, a first fixed terminal and a second fixed terminal. It can be understood that, in some embodiments, the microprocessor 17 can control the corresponding radio frequency switch to switch between the first fixed terminal and the second fixed terminal by outputting a high level or a low level to the moving terminal of each radio frequency switch (e.g., the first radio frequency switch 151, the second radio frequency switch 152 and the third radio frequency switch 153), so as to form different radio frequency paths. In other embodiments, the first radio frequency switch 151, the second radio frequency switch 152 and the third radio frequency switch 153 can also be switching tubes or other circuit modules or electronic devices that realize the switching function.

[0062] The antenna module 16 includes a first antenna 161, a second antenna 162 and a third antenna 163. Among them, the first antenna 161 and the second antenna 162 are external antennas, and the third antenna 163 is an internal antenna. That is, the first antenna 161 and the second antenna 162 are arranged outside the shell 101 of the vehicle-mounted unit 10, and the third antenna 163 is arranged inside the shell 101 of the vehicle-mounted unit 10 (please refer to FIG. 1). Figure 5 It can be understood that the third antenna 163 arranged in the vehicle-mounted unit 10 is less likely to be damaged, so that the vehicle-mounted unit 10 can be provided with a backup antenna when the first antenna 161 and the second antenna 162 as external antennas are damaged.

[0063] In the embodiment, the main processor 13 also detects the working state of each antenna in the antenna module 16 through the microprocessor 17.

[0064] It can be understood that the impedance of the signal path when the antenna is normally working is certain after the vehicle-mounted unit 10 is installed, and the current size of the signal for powering the antenna also remains within a certain range. Therefore, after the power supply signal is input, if the corresponding antenna is in a normal working state, the current size of the antenna will be detected within a preset current range; if the corresponding antenna is in an abnormal working state, such as antenna damage, short circuit or open circuit, the current size of the antenna will be detected outside the preset range. Therefore, in the embodiment, the microprocessor 17 can detect the current size of the first antenna 161, the second antenna 162 and the third antenna 163 through the sensor to determine whether the first antenna 161, the second antenna 162 and the third antenna 163 are in a normal working state.

[0065] It can be understood that in some embodiments, the on-board unit 10 further comprises an analog-digital conversion module (not shown in the figure) to convert the analog current signals of each antenna detected by the microprocessor 17 through the sensor (not shown in the figure) into digital quantities, facilitating the microprocessor 17 to determine the state of each antenna (the first antenna 161, the second antenna 162 and the third antenna 163).

[0066] It can be understood that the microprocessor 17 further outputs the detection result to the main processor 13. When all the antennas in the antenna module 16 cannot work normally, the main processor 13 controls the prompt module to output corresponding warning information to remind the staff to repair or replace the corresponding parts.

[0067] In this way, under the control of the main processor 13, the microprocessor 17 controls the first radio frequency switch 151, the first radio frequency switch 151 and the third radio frequency switch 153 to perform corresponding switching according to the selected SIM and the detected state of the antenna, to ensure that the on-board unit 10 realizes the emergency call function.

[0068] In the embodiment, the movable terminal C1 of the first radio frequency switch 151 is electrically connected to the modem 14, the first fixed terminal A1 of the first radio frequency switch 151 is electrically connected to the first antenna 161, and the second fixed terminal B1 of the first radio frequency switch 151 is electrically connected to the second fixed terminal B3 of the third radio frequency switch 153. The movable terminal C2 of the second radio frequency switch 152 is electrically connected to the modem 14, the first fixed terminal A2 of the second radio frequency switch 152 is electrically connected to the second antenna 162, and the second fixed terminal B2 of the second radio frequency switch 152 is electrically connected to the first fixed terminal A3 of the third radio frequency switch 153. The movable terminal C3 of the third radio frequency switch 153 is electrically connected to the third antenna 163. And the first radio frequency switch 151 is used for transmitting or receiving communication data of the first SIM, and the second radio frequency switch 152 is used for transmitting or receiving communication data of the second SIM.

[0069] When the main processor 13 detects that the first antenna 161 is in a normal state through the microprocessor 17, the main processor 13 can select the first SIM 11 to make a call. In this way, under the control of the main processor 13, the microprocessor 17 can control the movable terminal C1 of the first radio frequency switch 151 to be switched to the first fixed terminal A1, so that the on-board unit 10 transmits or receives data through the first antenna 161. When the main processor 13 detects that the third antenna 163 is in a normal state through the microprocessor 17, the main processor 13 can select the first SIM 11 to make a call. In this way, under the control of the main processor 13, the microprocessor 17 can control the movable terminal C1 of the first radio frequency switch 151 to be switched to the second fixed terminal B1, and control the movable terminal C3 of the third radio frequency switch 153 to be switched to the second fixed terminal B3, so that the on-board unit 10 transmits or receives data through the third antenna 163.

[0070] Similarly, when the main processor 13 detects that the second antenna 162 is in a normal state through the microprocessor 17, the main processor 13 can select the second SIM 12 to make a call, so that the microprocessor 17 can control the movable terminal C2 of the second radio frequency switch 152 to be switched to the first fixed terminal A2 under the control of the main processor 13, so that the vehicle-mounted unit 10 transmits or receives data through the second antenna 162. When the main processor 13 detects that the third antenna 163 is in a normal state through the microprocessor 17, the main processor 13 can select the second SIM 12 to make a call, so that the microprocessor 17 can control the movable terminal C1 of the second radio frequency switch 152 to be switched to the second fixed terminal B2 and control the movable terminal C3 of the third radio frequency switch 153 to be switched to the first fixed terminal A3 under the control of the main processor 13, so that the vehicle-mounted unit 10 transmits or receives data through the third antenna 163.

[0071] In the embodiment, the movable device 1 is further provided with an airbag module 19 (see Figure 3 It can be understood that the airbag module 19 is provided with a collision sensor (not shown in the figure) for sensing a collision when the movable device 1 is hit. Thus, the airbag module 19 automatically expands after sensing the collision, thereby buffering the pressure received by the passenger when hit, protecting the passenger. It can be understood that the airbag module 19 is also electrically connected to the microprocessor 17, so that the main processor 13 can sense a collision through the microprocessor 17 and the collision sensor, and trigger the emergency call function of the vehicle-mounted unit 10 when the collision is sensed. The emergency call function refers to that the vehicle-mounted unit 10 automatically sends a distress signal to the rescue center 2.

[0072] In some embodiments, the vehicle-mounted unit 10 is also provided with a corresponding button (not shown in the figure) and is electrically connected to the main processor 13. Thus, the main processor 13 can trigger the emergency call function when detecting that the passenger touches the button.

[0073] It can be understood that the vehicle-mounted unit 10 provided by the present application can obtain a wider network coverage range on the one hand by providing the first SIM 11 and the second SIM 12, thereby improving the call success rate of the vehicle-mounted unit 10; on the other hand, by providing external antennas (such as the first antenna 161 and the second antenna 162) and internal antennas (such as the third antenna 163), the size of the vehicle-mounted unit 10 can be reduced while ensuring that the vehicle-mounted unit 10 can continue to maintain network connection in the case that the external antenna is damaged.

[0074] It can be understood that the present application does not limit the number of radio frequency switches in the radio frequency switch module 15 and the number of antennas in the antenna module 16, and the number of radio frequency switches and the number of antennas can be equal or not equal. For example, in other embodiments, the number of radio frequency switches in the radio frequency switch module 15 can be greater than or equal to 2. The number of antennas in the antenna module 16 can be greater than or equal to 2, and at least one antenna in the antenna module 16 is a built-in antenna. Those skilled in the art can adjust the number of radio frequency switches in the radio frequency switch module 15 and the number of antennas in the antenna module 16 according to actual needs, and those skilled in the art can further adjust the connection relationship between the radio frequency switch and the antenna according to the number of radio frequency switches and antennas to realize the function that the external antenna and the built-in antenna can both send signals to the rescue center.

[0075] Please continue to refer to Figure 4 and Figure 6 The embodiment of the present application also provides a control method for controlling the working of the vehicle-mounted unit 10. It can be understood that the control method is executed by the main processor 13, and the control method comprises the following steps:

[0076] Step S1: power on.

[0077] Step S2: detecting the antennas in the antenna module 16 to determine whether at least one antenna is in a normal state.

[0078] It can be understood that the main processor 13 can detect the state of several antennas in the antenna module 16 through the microprocessor 17. It can be understood that the specific antenna detection principle and process can be referred to the detection of the antenna module 16 by the microprocessor 17 described above, which will not be repeated here.

[0079] Step S3: when the judgment result of step S2 is yes, that is, at least one antenna is in a normal state, and the emergency call function is triggered, according to the selection of the first SIM 11 and the second SIM 12, the radio frequency switch module 15 is controlled to switch to output the distress signal using the antenna in the antenna module 16 that is in a normal state.

[0080] For example, please refer to the following logical control truth table. In the first case (case 1), when the main processor 13 detects through the microprocessor 17 that the first antenna 161 and the second antenna 162 are in a normal state, and the emergency call function is triggered, the main processor 13 controls the first SIM 11 and the second SIM 12 to call through the first antenna 161 and the second antenna 162, respectively.

[0081] In the second case (case 2), when the main processor 13 detects that the first antenna 161 and the third antenna 163 are in normal state, the second antenna 162 is in abnormal state, and the emergency call function is triggered through the microprocessor 17, the main processor 13 controls the first SIM 11 to make a call through the first antenna 161, and the main processor 13 controls the second SIM 12 to make a call through the third antenna 163.

[0082] In the third case (case 3), when the main processor 13 detects that the second antenna 162 and the third antenna 163 are in normal state, the first antenna 161 is in abnormal state, and the emergency call function is triggered through the microprocessor 17, the main processor 13 controls the first SIM 11 to make a call through the third antenna 163, and the main processor 13 controls the second SIM 12 to make a call through the second antenna 162.

[0083] In the fourth case (case 4) and the fifth case (case 5), when the main processor 13 detects that the first antenna 161 and the second antenna 162 are in abnormal state, the third antenna 163 is in normal state, and the emergency call function is triggered through the microprocessor 17, the main processor 13 can control the first SIM 11 to make a call through the third antenna 163 (please refer to case 4), or the main processor 13 controls the second SIM 12 to make a call through the third antenna 163 (please refer to case 5).

[0084] In this way, in the vehicle-mounted unit 10, even if any one of the first antenna 161, the second antenna 162, and the third antenna 163 cannot work normally, the dual-card dual-connection mode of the vehicle-mounted unit 10 can still be maintained, so as to improve the call success rate of the vehicle-mounted unit 10. In addition, in the vehicle-mounted unit 10, even if only one antenna of the first antenna 161, the second antenna 162, and the third antenna 163 can be used normally, the first SIM 11 or the second SIM 12 in the vehicle-mounted unit 10 can still make a call, so as to comprehensively ensure the normal operation of the E-Call system of the vehicle-mounted unit 10.

[0085] It can be understood that the dual-card dual-connection refers to that the same vehicle-mounted unit 10 can make a call through two SIMs (for example, the first SIM 11 and the second SIM 12) at the same time, and can access signals for calling at the same time. In this way, the vehicle-mounted unit 10 can effectively improve the call success rate by setting the first SIM 11 and the second SIM 12.

[0086]

[0087] Step S4: When the result of step S2 is no, that is, all the antennas in the antenna module 16 are in abnormal state, output a prompt information.

[0088] It can be understood that in the embodiment, when the main processor 13 detects that at least one of the first antenna 161, the second antenna 162 and the third antenna 163 is abnormal through the microprocessor 17, the main processor 13 controls the prompt module to output prompt information to remind the passengers in the vehicle to maintain the vehicle-mounted unit 10.

[0089] It can be understood that in some embodiments, the vehicle-mounted unit 10 is also provided with a positioning module 18 (please refer to Figure 3 It can be understood that the positioning module 18 is used to obtain the current latitude and longitude data and other position information of the movable device 1. The positioning module 18 is electrically connected to the main processor 13, so that when the emergency call function of the vehicle-mounted unit 10 is triggered, the main processor 13 also obtains the position information from the positioning module 18, and integrates the rescue-related data such as the accident time, the accident vehicle license plate number, and the number of passengers, and packs it into a minimum data set, and processes it into a radio frequency signal containing the above minimum data set through the modem 14, to transmit the rescue information to the rescue center 2.

[0090] It can be understood that the positioning module 18 can be a positioning module based on the Global Positioning System (GPS), the Beidou positioning system or any other satellite positioning system.

[0091] It can be understood that in some embodiments, the rescue center 2 can be a central base station for rescue; in other embodiments, the rescue center 2 can also be a specific contact person, and the type of the rescue center 2 is not limited in the application.

[0092] It can be understood that in the embodiment, the main processor 13 can be a baseband microprocessor, a central processing unit (CPU), and can also be other general-purpose microprocessors, digital signal microprocessors (DSP), application specific integrated circuits (ASIC), ready programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It can be understood that the main processor 13 is the control center of the vehicle-mounted unit 10, and connects each part of the entire vehicle-mounted unit 10 through various interfaces and lines.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application. Those skilled in the art can also make other changes in the design of the present application within the spirit of the present application, as long as the technical effects of the present application are not deviated. The changes made according to the spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle-mounted unit for communicating with a rescue center, characterized in that, The vehicle-mounted unit includes a first user identity recognition module, a second user identity recognition module, a main processor, a microprocessor, a modem supporting dual-SIM dual-pass technology, an RF switch module, and an antenna module. The RF switch module includes a first RF switch, a second RF switch, and a third RF switch. The antenna module includes a first antenna, a second antenna, and a third antenna. The microprocessor is electrically connected to the main processor. The first user identity recognition module and the second user identity recognition module are both electrically connected to the main processor. The main processor is also electrically connected to the modem. The moving terminal of the first RF switch is electrically connected to the modem. The first stationary terminal of the first RF switch is electrically connected to the first antenna. The first stationary terminal of the second RF switch is electrically connected to the second stationary terminal of the third RF switch, the second stationary terminal of the second RF switch is electrically connected to the modem, the first stationary terminal of the second RF switch is electrically connected to the second antenna, the second stationary terminal of the second RF switch is electrically connected to the first stationary terminal of the third RF switch, and the moving terminal of the third RF switch is electrically connected to the third antenna. The first RF switch is used to transmit or receive communication data from the first user identification module, and the second RF switch is used to transmit or receive communication data from the second user identification module. The microprocessor is used to control the moving terminal of the corresponding RF switch to switch between the corresponding first stationary terminal and the second stationary terminal. The microprocessor is also electrically connected to the modem. The main processor, through the microprocessor, detects whether at least one antenna is in a normal state, including the first antenna, the second antenna, and the third antenna. When the first antenna and the second antenna are detected to be in a normal state, and the emergency call function is triggered, the main processor controls the first user identification module and the second user identification module to make calls through the first antenna and the second antenna, respectively. When the first antenna and the third antenna are detected to be in a normal state, and the second antenna is in an abnormal state, and the emergency call function is triggered, the main processor controls the first user identification module to make a call through the first antenna and controls the second user identification module to make a call through the third antenna. When the second and third antennas are in normal condition, and the first antenna is in abnormal condition, and the emergency call function is triggered, the system controls the first user identification module to make a call through the third antenna, and controls the second user identification module to make a call through the second antenna; when the first and second antennas are detected to be in abnormal condition, the third antenna is in normal condition, and the emergency call function is triggered, the system controls the first user identification module to make a call through the third antenna, or controls the second user identification module to make a call through the third antenna; and when all antennas are detected to be in abnormal condition, a prompt message is output to remind passengers in the vehicle to repair the on-board unit.

2. The vehicle-mounted unit as described in claim 1, characterized in that, The vehicle-mounted unit includes a housing, and at least one antenna in the antenna module is disposed within the housing.

3. The vehicle-mounted unit as described in claim 1, characterized in that, When the main processor detects an anomaly in either the first user identification module or the second user identification module, the main processor switches to using the other of the two modules that is not experiencing an anomaly for the call.

4. The vehicle-mounted unit as described in claim 1, characterized in that, The vehicle unit also includes an airbag module, which is electrically connected to the microprocessor. The airbag module is also equipped with a collision sensor. When the main processor detects a collision through the microprocessor and the collision sensor, the main processor triggers the emergency call function to automatically send a distress signal.

5. A movable device, characterized in that, The movable device includes the vehicle-mounted unit as described in any one of claims 1-4.

6. A control method, characterized in that, The control method is applied to the vehicle-mounted unit as described in any one of claims 1-4, and the control method includes the following steps: S1: Check if at least one antenna in the antenna module is in normal condition; S2: When at least one of the antennas in the antenna module is in normal condition and the emergency call function is triggered, the radio frequency switch module is controlled to switch according to the selection of the first user identification module and the second user identification module, so as to output a distress signal using the antenna in normal condition. Step S2 includes: When the first antenna and the second antenna are detected to be in normal condition, and the emergency call function is triggered, the first user identification module and the second user identification module are controlled to make calls through the first antenna and the second antenna respectively. When the first antenna and the third antenna are detected to be in normal condition, and the second antenna is in abnormal condition, and the emergency call function is triggered, the first user identification module is controlled to make a call through the first antenna, and the second user identification module is controlled to make a call through the third antenna. When the second antenna and the third antenna are detected to be in normal condition, and the first antenna is in abnormal condition, and the emergency call function is triggered, the first user identification module is controlled to make a call through the third antenna, and the second user identification module is controlled to make a call through the second antenna. When the first antenna and the second antenna are detected to be in an abnormal state, and the third antenna is in a normal state, and the emergency call function is triggered, the first user identification module is controlled to make a call through the third antenna, or the second user identification module is controlled to make a call through the third antenna. When the first antenna, the second antenna, and the third antenna are all detected to be in an abnormal state, a prompt message is output to remind passengers in the vehicle to repair the on-board unit.

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