RELIABLE AND AUTOMATIC ON-BOARD UNIT FOR VEHICLES IN DISTRESS, MOVABLE DEVICE, AND METHOD OF CONTROLLING SAME

Abstract

A fail-safe on-board unit, a movable device, and a control method for a vehicle which will automatically and reliably broadcast a distress signal to a rescue center in the event of accident includes in the on-board unit a first subscriber identity module (SIM), a second SIM, a main processor, a modem, a radio frequency (RF) switch module, and an antenna module with several antennas. The main processor selects the first SIM and / or the second SIM to make a call to generate a baseband signal, and outputs the baseband signal to the modem, the modem converts the baseband signal into an RF signal, and outputs the RF signal to the RF switch module to transmit outward via one or more antennas of the antenna module. The on-board unit has a wider network coverage to ensure higher success rate of emergency calls.

Description

Claims

1. An on-board unit configured for communication with rescue center, and comprising a first subscriber identity module (SIM), a second SIM, a main processor, a modem, a radio frequency (RF) switch module, and an antenna module, wherein each of the first SIM and the second SIM is electrically connected to the main processor;the main processor is electrically connected to the modem;the modem is electrically connected to each of the RF switch module and the antenna module; andwherein the main processor selects from the first SIM and the second SIM to make a call to generate a corresponding baseband signal, and outputs the baseband signal to the modem, the modem converts the baseband signal into a RF signal, and outputs the RF signal to the RF switch module to transmit outward via the antenna module.

2. The on-board unit of claim 1, wherein the on-board unit further comprises a microprocessor, the microprocessor is electrically connected to the main processor, the RF switch module comprises a plurality of RF switches, and the microprocessor is also electrically connected to each of the plurality of RF switches to control switching connection of each RF switch under the control of the main processor.

3. The on-board unit of claim 2, wherein the antenna module comprises a plurality of antennas, and the microprocessor is also electrically connected to each of the plurality of antennas to detect whether each of the plurality of antenna is in a normal state.

4. The on-board unit of claim 3, wherein the on-board unit further comprises a housing, at least one antenna of the antenna modules is arranged in the housing.

5. The on-board unit of claim 3, wherein the antennas comprises a first antenna, a second antenna and a third antenna, and the RF switches comprises a first RF switch, a second RF switch and a third RF switch; a moving end of the first RF switch is electrically connected to the modem, a first fixed end of the first RF switch is electrically connected to the first antenna, a second fixed end of the first RF switch is electrically connected to a second fixed end of the third RF switch, a moving end of the second RF switch is electrically connected to the modem, a first fixed end of the second RF switch is electrically connected to the second antenna, a second fixed end of the second RF switch is electrically connected to a first fixed end of the third RF switch, and a moving end of the third RF switch is electrically connected to the third antenna; and wherein the first RF switch is configured to transmit or receive communication data of the first SIM, the second RF switch is configured to transmit or receive communication data of the second SIM, and the microprocessor is configured to control the moving end of corresponding RF switch to switch between the first fixed end and the second fixed end.

6. The on-board unit of claim 1, wherein the modem supports dual card dual pass technology.

7. The on-board unit of claim 1, wherein when the main processor detects that one of the first SIM and the second SIM is abnormal, the main processor selects another one of the first SIM and the second SIM without abnormality to make a call.

8. The on-board unit of claim 2, wherein the on-board unit further comprises an airbag module, the airbag module is electrically connected to the microprocessor, the airbag module comprises a collision sensor, when the main processor senses a collision through the microprocessor and the collision sensor, the main processor triggers an emergency call function to automatically send a distress signal.

9. A movable device comprising an on-board unit, and the on-board unit comprising a first subscriber identity module (SIM), a second SIM, a main processor, a modem, a radio frequency (RF) switch module and an antenna module, wherein each of the first SIM and the second SIM is electrically connected to the main processor;the main processor is electrically connected to the modem;the modem is electrically connected to each of the RF switch module and the antenna module; andwherein the main processor selects from the first SIM and the second SIM to make a call to generate a corresponding baseband signal, and outputs the baseband signal to the modem, the modem converts the baseband signal into a RF signal, and outputs the RF signal to the RF switch module to transmit outward via the antenna module.

10. The movable device of claim 9, wherein the on-board unit further comprises a microprocessor, the microprocessor is electrically connected to the main processor, the RF switch module comprises a plurality of RF switches, and the microprocessor is also electrically connected to each of the plurality of RF switches to control switching connection of each RF switch under the control of the main processor.

11. The movable device of claim 10, wherein the antenna module comprises a plurality of antennas, and the microprocessor is also electrically connected to each of the plurality of antennas to detect whether each of the plurality of antennas is in a normal state.

12. The movable device of claim 11, wherein the on-board unit further comprises a housing, at least one antenna of the antenna modules is arranged in the housing.

13. The movable device of claim 11, wherein the antennas comprises a first antenna, a second antenna and a third antenna, and the RF switches comprises a first RF switch, a second RF switch and a third RF switch; a moving end of the first RF switch is electrically connected to the modem, a first fixed end of the first RF switch is electrically connected to the first antenna, a second fixed end of the first RF switch is electrically connected to a second fixed end of the third RF switch, a moving end of the second RF switch is electrically connected to the modem, a first fixed end of the second RF switch is electrically connected to the second antenna, a second fixed end of the second RF switch is electrically connected to a first fixed end of the third RF switch, and a moving end of the third RF switch is electrically connected to the third antenna; and wherein the first RF switch is configured to transmit or receive communication data of the first SIM, the second RF switch is configured to transmit or receive communication data of the second SIM, and the microprocessor is configured to control the moving end of corresponding RF switch to switch between the first fixed end and the second fixed end.

14. The movable device of claim 9, wherein the modem supports dual card dual pass technology.

15. The movable device of claim 9, wherein when the main processor detects that one of the first SIM and the second SIM is abnormal, the main processor selects another one of the first SIM and the second SIM without abnormality to make a call.

16. The movable device of claim 10, wherein the on-board unit further comprises an airbag module, the airbag module is electrically connected to the microprocessor, the airbag module comprises a collision sensor, when the main processor senses a collision through the microprocessor and the collision sensor, the main processor triggers an emergency call function to automatically send a distress signal.

17. A control method comprising: detecting whether at least one antenna in an antenna module is in a normal state; andcontrolling a radio frequency (RF) switch module to switch according to selection of a first subscriber identity module (SIM) and a second SIM when emergency call function is triggered, so as to output a distress signal by using the antenna in the normal state.

18. The control method of claim 17, wherein when the antenna module comprises a first antenna, a second antenna and a third antenna, the controlling a radio frequency (RF) switch module to switch according to selection of a first subscriber identity module (SIM) and a second SIM when emergency call function is triggered, so as to output a distress signal by using the antenna in the normal state by: controlling the first SIM and the second SIM to call through the first antenna and the second antenna respectively when the first antenna and the second antenna are in a normal state and the emergency call function is triggered; andcontrolling the first SIM to call through the first antenna and controlling the second SIM to call through the third antenna when the first antenna and the third antenna are in the normal state, the second antenna is in an abnormal state and the emergency call function is triggered.

19. The control method of claim 18, further comprising: controlling the first SIM to call through the third antenna or controlling the second SIM to call through the second antenna when the second antenna and the third antenna are in the abnormal state, the first antenna is in the normal state and the emergency call function is triggered.

20. The control method of claim 19, further comprising: controlling the first SIM to call through the third antenna or controlling the second SIM to call through the third antenna when the first antenna and the second antenna are in the abnormal state, the third antenna is in the normal state and the emergency call function is triggered.