Wireless communication module, antenna switching system and method

Abstract

The application relates to a wireless communication module, an antenna switching system and a method, and relates to the field of communication.The wireless communication module comprises a modem, a target main transmitting and receiving module, an antenna switching circuit, a target filter and a frequency divider; the target main transmitting and receiving module and the target filter are electrically connected through the antenna switching circuit; a first end of the antenna switching circuit is electrically connected with the target main transmitting and receiving module, a second end of the antenna switching circuit is electrically connected with the target filter, and a third end of the antenna switching circuit is used for being electrically connected with a backup antenna; the frequency divider is used for being electrically connected with a main transmitting and receiving antenna; and the modem is used for controlling the antenna switching circuit to turn on a path between the target main transmitting and receiving module and the backup antenna when at least one fault in the target filter and the frequency divider is detected.The application is used to solve the problem that when at least one fault in the filter and the frequency divider connected with the main transmitting and receiving module in the wireless communication module occurs, signals in the wireless communication module cannot be normally transmitted for an emergency call.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and in particular to a wireless communication module, an antenna switching system and method. BACKGROUND

[0002] With the continuous development of technology, wireless communication modules are becoming more and more complex, and the number of antennas required by wireless communication modules is also increasing. When a vehicle is driving in a harsh environment for a long time or a traffic accident occurs, some components or antennas in the wireless communication module may be damaged.

[0003] Currently, the wireless communication module and each antenna in most vehicles are connected through an antenna switching circuit, which is arranged outside the wireless communication module. When at least one of the filter and the frequency divider connected to the main transmitting and receiving module inside the wireless communication module fails, the signal in the wireless communication module cannot be normally transmitted, resulting in that the wireless communication module cannot be used for emergency calls. SUMMARY

[0004] The present application provides a wireless communication module, an antenna switching system and method to solve the problem that when at least one of the filter and the frequency divider connected to the main transmitting and receiving module inside the wireless communication module fails, the signal in the wireless communication module cannot be normally transmitted for emergency calls.

[0005] In a first aspect, the embodiments of the present application provide a wireless communication module, comprising a modem, a target main transmitting and receiving module, an antenna switching circuit, a target filter and a frequency divider;

[0006] The modem, the target main transmitting and receiving module, the target filter and the frequency divider are sequentially connected in series; wherein the target main transmitting and receiving module and the target filter are electrically connected through the antenna switching circuit; a first end of the antenna switching circuit is electrically connected to the target main transmitting and receiving module, a second end is electrically connected to the target filter, and a third end is used for electrical connection with a backup antenna; the frequency divider is used for electrical connection with a main transmitting and receiving antenna;

[0007] The modem is configured to, when detecting that at least one of the target filter and the frequency divider fails, control the antenna switching circuit to turn on a path between the target main transmitting and receiving module and the backup antenna.

[0008] Optionally, the modem is configured to receive a communication quality characterization parameter of the main transmitting and receiving antenna and a communication quality characterization parameter of the backup antenna, and determine that at least one of the target filter and the frequency divider fails according to the communication quality characterization parameter of the main transmitting and receiving antenna and the communication quality characterization parameter of the backup antenna.

[0009] Optionally, the modem is specifically configured to determine that at least one of the target filter and the frequency divider is faulty in a case that a difference between a value of the communication quality characterization parameter of the backup antenna and a value of the communication quality characterization parameter of the main transmitting-receiving antenna is greater than a preset value.

[0010] Optionally, the target main transmitting-receiving module comprises a low-frequency main transmitting-receiving module or a medium-high-frequency main transmitting-receiving module.

[0011] The antenna switching circuit comprises an antenna switching switch.

[0012] Optionally, the target main transmitting-receiving module comprises a low-frequency main transmitting-receiving module and a medium-high-frequency main transmitting-receiving module.

[0013] The antenna switching circuit comprises a first antenna switching switch, a second antenna switching switch and a third antenna switching switch; and the target filter comprises a first filter and a second filter.

[0014] The modem, the low-frequency main transmitting-receiving module, the first filter and the frequency divider are sequentially connected in series; the low-frequency main transmitting-receiving module and the first filter are electrically connected through the first antenna switching switch; the modem, the medium-high-frequency main transmitting-receiving module, the second filter and the frequency divider are sequentially connected in series; the medium-high-frequency main transmitting-receiving module and the second filter are electrically connected through the second antenna switching switch; a fixed connection end of the first antenna switching switch is electrically connected to the low-frequency main transmitting-receiving module, a first switching end is electrically connected to the first filter, and a second switching end is electrically connected to a first switching end of the third antenna switching switch; a fixed connection end of the second antenna switching switch is electrically connected to the medium-high-frequency main transmitting-receiving module, a first switching end is electrically connected to the second filter, and a second switching end is electrically connected to a second switching end of the third antenna switching switch; and a fixed connection end of the third antenna switching switch is configured to be electrically connected to the backup antenna.

[0015] Optionally, the antenna switching circuit further comprises a fourth antenna switching switch, and the number of the backup antennas is at least two.

[0016] The fixed connection end of the third antenna switching switch is connected to a fixed connection end of the fourth antenna switching switch, and each switching end of the fourth antenna switching switch is configured to be electrically connected to a different backup antenna.

[0017] The modem is specifically configured to select a target backup antenna with the best communication quality from the backup antennas according to the communication quality characterization parameters of the backup antennas when detecting at least one fault in the target filter and the frequency divider, and control the fourth antenna switch to turn on a path between the fixed connection end of the third antenna switch and the target backup antenna.

[0018] Optionally, the wireless communication module further comprises at least one backup receiving module and at least one fifth switch.

[0019] The modem and the backup receiving module are connected in series, the first switching end of the fifth switch is electrically connected to the backup receiving module, the second switching end is electrically connected to one switching end of the fourth antenna switch, and the fixed connection end is used to electrically connect the backup antenna.

[0020] In the second aspect, the embodiments of the present application provide an antenna switching system, comprising the wireless communication module, the main transmitting and receiving antenna, and the backup antenna of the first aspect.

[0021] In the third aspect, the embodiments of the present application provide an antenna switching method applied to the modem in the wireless communication module of the first aspect, and the antenna switching method comprises the following steps.

[0022] When detecting at least one fault in the target filter and the frequency divider, the antenna switching circuit is controlled to turn on a path between the target main transmitting and receiving module and the backup antenna.

[0023] Optionally, the detection of at least one fault in the target filter and the frequency divider comprises the following steps.

[0024] The communication quality characterization parameters of the main transmitting and receiving antenna and the communication quality characterization parameters of the backup antenna are received.

[0025] At least one fault in the target filter and the frequency divider is determined according to the communication quality characterization parameters of the main transmitting and receiving antenna and the communication quality characterization parameters of the backup antenna.

[0026] Optionally, the determination of at least one fault in the target filter and the frequency divider according to the communication quality characterization parameters of the main transmitting and receiving antenna and the communication quality characterization parameters of the backup antenna comprises the following steps.

[0027] In the case where the difference between the value of the communication quality characterization parameter of the backup antenna and the value of the communication quality characterization parameter of the main transmitting and receiving antenna is greater than a preset value, it is determined that at least one fault in the target filter and the frequency divider.

[0028] Optionally, the controlling the antenna switching circuit to turn on the path between the target main transmitting and receiving module and the backup antenna when detecting at least one fault in the target filter and the frequency divider comprises:

[0029] selecting a target backup antenna with the best communication quality from the backup antennas according to the communication quality representation parameters of the backup antennas;

[0030] controlling the fourth antenna switching switch to turn on the path between the fixed connection end of the third antenna switching switch and the target backup antenna.

[0031] Optionally, before the controlling the antenna switching circuit to turn on the path between the target main transmitting and receiving module and the backup antenna, the method further comprises:

[0032] receiving an emergency call request;

[0033] after the controlling the antenna switching circuit to turn on the path between the target main transmitting and receiving module and the backup antenna, the method further comprises:

[0034] establishing an emergency call connection between the wireless communication module and a rescue device through the backup antenna.

[0035] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages: in the embodiments of the present application, a wireless communication module is provided, which comprises a modem, a target main transmitting and receiving module, an antenna switching circuit, a target filter and a frequency divider, the modem, the target main transmitting and receiving module, the target filter and the frequency divider are sequentially connected in series, wherein the target main transmitting and receiving module and the target filter are electrically connected through the antenna switching circuit, the first end of the antenna switching circuit is electrically connected to the target main transmitting and receiving module, the second end of the antenna switching circuit is electrically connected to the target filter, and the third end of the antenna switching circuit is used for electrical connection with a backup antenna, the frequency divider is used for electrical connection with a main transmitting and receiving antenna, and the modem controls the antenna switching circuit to turn on the path between the target main transmitting and receiving module and the backup antenna when detecting at least one fault in the target filter and the frequency divider. In the present application, the antenna switching circuit is arranged inside the wireless communication module, the target main transmitting and receiving module and the target filter are electrically connected through the antenna switching circuit, and when at least one fault occurs in the target filter and the frequency divider, the modem can control the antenna switching circuit to turn on the path between the target main transmitting and receiving module and the backup antenna, without the need for communication through the target filter and the frequency divider. The wireless communication module can transmit signals normally through the modem, the target main transmitting and receiving module and the backup antenna for emergency calls, thereby solving the problem that when at least one fault occurs in the filter and the frequency divider connected to the main transmitting and receiving module inside the wireless communication module, the signals in the wireless communication module cannot be normally transmitted for emergency calls. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of an antenna switching system in the prior art;

[0039] Figure 2 This is a schematic diagram of the wireless communication module in an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the structure of a wireless communication module in a specific embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of a wireless communication module in a specific embodiment of this application;

[0042] Figure 5 This is a schematic diagram of the structure of a wireless communication module in a specific embodiment of this application;

[0043] Figure 6 This is a schematic diagram of the antenna switching system in an embodiment of this application;

[0044] Figure 7 This is a schematic flowchart of an antenna switching method in a specific embodiment of this application;

[0045] Figure 8 This is a schematic flowchart of an antenna switching method in a specific embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The wireless communication module in the embodiments of the present application refers to a module capable of realizing communication function, for example, any one of 2G communication module, 3G communication module, 4G communication module, 5G communication module, NB-IOT communication module, etc.

[0048] The inventors found through analysis of an existing antenna switching system that, as shown in Figure 1 An existing antenna switching system includes a wireless communication module, an antenna switching circuit, a PRX (Primary Receiver), a DRX (Diversity Receiver), an Emergency Internal, a MIMO1 (Multiple Input Multiple Output), and a MIMO2.

[0049] The wireless communication module includes a modem, a low-frequency main transmitting and receiving module, a medium-high-frequency main transmitting and receiving module, a 5G main transmitting and receiving module, a first low-pass filter, a second low-pass filter, a high-pass filter, a frequency divider, an auxiliary receiving module, a MIMO receiving module 1, and a MIMO receiving module 2.

[0050] The modem, the low-frequency main transmitting and receiving module, the first low-pass filter, and the frequency divider are connected in series, the modem, the medium-high-frequency main transmitting and receiving module, the second low-pass filter, and the frequency divider are connected in series, the modem, the 5G main transmitting and receiving module, the high-pass filter, and the frequency divider are connected in series, the modem is connected to the auxiliary receiving module, the modem is connected to the MIMO receiving module 1, the modem is connected to the MIMO receiving module 2, the first end of the antenna switching circuit is connected to the frequency divider, the second end is connected to the auxiliary receiving module, the third end is connected to the MIMO receiving module 1, the fourth end is connected to the MIMO receiving module 2, the fifth end is connected to the PRX, the sixth end is connected to the DRX, the seventh end is connected to the Emergency Internal, the eighth end is connected to the MIMO1, and the ninth end is connected to the MIMO2.

[0051] Among them, the Emergency Internal is arranged in the vehicle interior, and is less likely to be damaged than the other four antennas PRX, DRX, MIMO1 and MIMO2 placed outside the vehicle, but the signal may be poorer.

[0052] The modem is used for controlling the antenna switching circuit to turn on the passage between any module and any antenna, wherein the any module refers to any one of a low-frequency main transmitting and receiving module, a medium-high frequency main transmitting and receiving module, a 5G main transmitting and receiving module, an auxiliary receiving module, a MIMO receiving module 1 and a MIMO receiving module 2, and the any antenna refers to any one of a PRX, a DRX, an Emergency Internal, a MIMO1 and a MIMO2.

[0053] However, the inventors find that, in an existing antenna switching system, the wireless communication module and the antennas are connected through the antenna switching circuit which is arranged outside the wireless communication module. When at least one of the filter and the frequency divider connected to the main transmitting and receiving module inside the wireless communication module fails, the signal in the wireless communication module cannot be normally transmitted, and the wireless communication module cannot be used for emergency calls.

[0054] Moreover, since the antenna switching circuit is arranged outside the wireless communication module, the harmonic and intermodulation components generated by the antenna switching circuit cannot be eliminated by the filter inside the wireless communication module, and can interfere with some frequency bands. For example, the second harmonic component (1576-1596 MHz) of B14 falls in the GPS (Global Positioning System) frequency band (1563-1587 MHz) and can interfere with GPS; the third harmonic (2331-2361 MHz) of B13 falls in the SDARS (Satellite Digital Audio Radio Services) frequency band (2320-2345 MHz) and can interfere with SDARS, and so on, wherein B14 and B13 are identifiers of the frequency bands.

[0055] In addition, since the antenna switching circuit is arranged outside the wireless communication module, additional loss is caused, and the transmitting power and the receiving sensitivity are deteriorated.

[0056] In order to solve the problem that, when at least one of the filter and the frequency divider connected to the main transmitting and receiving module inside the wireless communication module fails, the signal in the wireless communication module cannot be normally transmitted for emergency calls, a wireless communication module is provided in the embodiments of the present application, as shown in FIG. 1. Figure 2 As shown in FIG. 1, the wireless communication module 10 includes a modem 11, a target main transmitting and receiving module 12, an antenna switching circuit 13, a target filter 14 and a frequency divider 15.

[0057] The modem 11, the target main transceiver module 12, the target filter 14 and the frequency divider 15 are connected in series; the target main transceiver module 12 and the target filter 14 are electrically connected through the antenna switching circuit 13; the first end of the antenna switching circuit is electrically connected to the target main transceiver module 12, the second end is electrically connected to the target filter 14, and the third end is electrically connected to the standby antenna 30; the frequency divider 15 is electrically connected to the main transceiver antenna 20.

[0058] The modem is configured to control the antenna switching circuit to turn on the path between the target main transceiver module and the standby antenna when at least one of the target filter and the frequency divider fails.

[0059] The target main transceiver module is a module that can be used for emergency calls.

[0060] The antenna switching circuit can be an antenna switching switch or at least two antenna switching switches.

[0061] The application sets the antenna switching circuit inside the wireless communication module, the target main transceiver module and the target filter are electrically connected through the antenna switching circuit, and the modem can control the antenna switching circuit to turn on the path between the target main transceiver module and the standby antenna when at least one of the target filter and the frequency divider fails, without the need for communication through the target filter and the frequency divider. The wireless communication module can use the modem, the target main transceiver module and the standby antenna to normally transmit signals for emergency calls, solving the problem that when at least one of the filters and the frequency dividers connected to the main transceiver module inside the wireless communication module fails, the signals in the wireless communication module cannot be normally transmitted for emergency calls.

[0062] Moreover, when the target filter and the frequency divider are both working normally, the target main transceiver module and the target filter are electrically connected through the antenna switching circuit, which can effectively filter out the harmonics and intermodulation components generated by the antenna switching circuit using the target filter, avoiding interference with other frequency bands.

[0063] In addition, the antenna switching circuit is set inside the wireless communication module, which can compensate for the loss of the antenna switching circuit when calibrating the wireless communication module, improving the transmission power and reception sensitivity of the wireless communication module.

[0064] In one embodiment, the modem is configured to receive a communication quality characterization parameter of the main transceiver antenna and a communication quality characterization parameter of the standby antenna, and determine at least one failure of the target filter and the frequency divider according to the communication quality characterization parameter of the main transceiver antenna and the communication quality characterization parameter of the standby antenna.

[0065] The communication quality characteristic parameter is used to represent the communication quality of the antenna. For example, the communication quality characteristic parameter can be RSSI (Received Signal Strength Indicator). According to the need, the communication quality characteristic parameter can also be other parameters. In this application, the communication quality characteristic parameter is taken as RSSI for example.

[0066] In one embodiment, the modem is specifically used to determine that at least one of the target filter and the frequency divider is faulty when the difference between the value of the communication quality characteristic parameter of the standby antenna and the value of the communication quality characteristic parameter of the main transmitting and receiving antenna is greater than a preset value.

[0067] The preset value can be an empirical value or a value obtained through multiple tests. For example, when the preset value is 20 dB, if the RSSI value of the standby antenna minus the RSSI value of the main transmitting and receiving antenna is greater than 20 dB, it indicates that at least one of the target filter and the frequency divider is faulty.

[0068] In one embodiment, the target main transmitting and receiving module includes a low-frequency main transmitting and receiving module or a medium-high-frequency main transmitting and receiving module.

[0069] The antenna switching circuit includes an antenna switching switch.

[0070] When the frequency band of the current network where the wireless communication module is located is low frequency, the low-frequency main transmitting and receiving module is used in an emergency call. When the frequency band of the current network where the wireless communication module is located is medium-high frequency, the medium-high-frequency main transmitting and receiving module is used in an emergency call.

[0071] When it is determined that the wireless communication module always works in a low-frequency network, the target main transmitting and receiving module includes a low-frequency main transmitting and receiving module. Only one antenna switching switch is needed, and the low-frequency main transmitting and receiving module and the target filter are electrically connected through the antenna switching switch.

[0072] When it is determined that the wireless communication module always works in a medium-high-frequency network, the target main transmitting and receiving module includes a medium-high-frequency main transmitting and receiving module. Only one antenna switching switch is needed, and the medium-high-frequency main transmitting and receiving module and the target filter are electrically connected through the antenna switching switch.

[0073] In one embodiment, as shown in FIG. 1, the target main transmitting and receiving module 12 includes a low-frequency main transmitting and receiving module and a medium-high-frequency main transmitting and receiving module. Figure 3

[0074] The antenna switching circuit 13 includes a first antenna switching switch K1, a second antenna switching switch K2, and a third antenna switching switch K3. The target filter includes a first filter and a second filter. ​

[0075] Modem 11, low-frequency main transmitter / receiver module, first filter, and frequency divider 15 are connected in series. The low-frequency main transmitter / receiver module and the first filter are electrically connected via a first antenna switch K1. Modem 11, mid-to-high frequency main transmitter / receiver module, second filter, and frequency divider are connected in series. The mid-to-high frequency main transmitter / receiver module and the second filter are electrically connected via a second antenna switch K2. The fixed connection terminal of the first antenna switch K1 is electrically connected to the low-frequency main transmitter / receiver module, the first switching terminal is electrically connected to the first filter, and the second switching terminal is electrically connected to the first switching terminal of the third antenna switch K3. The fixed connection terminal of the second antenna switch K2 is electrically connected to the mid-to-high frequency main transmitter / receiver module, the first switching terminal is electrically connected to the second filter, and the second switching terminal is electrically connected to the second switching terminal of the third antenna switch K3. The fixed connection terminal of the third antenna switch K3 is used for electrical connection with the spare antenna.

[0076] Figure 3 In the middle, the modem 11 is also connected to the control terminal of the first antenna switch K1, the control terminal of the second antenna switch K2, and the control terminal of the third antenna switch K3.

[0077] During vehicle operation, the frequency band of the current network in which the wireless communication module is located may change.

[0078] The modem is specifically used to detect the frequency band of the current network where the wireless communication module is located. When the frequency band of the current network where the wireless communication module is located is low frequency, if at least one of the first filter and the frequency divider is detected as fault, the first antenna switching switch K1 is controlled to switch to the second switching end, and the third antenna switching switch K3 is controlled to switch to the first switching end, so as to open the path between the low frequency main transmitting and receiving module and the backup antenna. When the frequency band of the current network where the wireless communication module is located is mid-high frequency, if at least one of the second filter and the frequency divider is detected as fault, the second antenna switching switch K2 is controlled to switch to the second switching end, and the third antenna switching switch K3 is controlled to switch to the second switching end, so as to open the path between the mid-high frequency main transmitting and receiving module and the backup antenna.

[0079] In each frequency band, the modem can control the antenna switching circuit to connect the target main transmitter / receiver module and the backup antenna corresponding to the current frequency band, ensuring that the target main transmitter / receiver module can transmit signals normally for emergency calls.

[0080] In one specific embodiment, such as Figure 4 As shown, the antenna switching circuit 13 also includes a fourth antenna switching switch K4, wherein the number of spare antennas is at least two;

[0081] The fixed connection terminal of the third antenna switch K3 is connected to the fixed connection terminal of the fourth antenna switch K4. Each switching terminal of the fourth antenna switch K4 is used to electrically connect different spare antennas.

[0082] The modem is specifically used to select the target backup antenna with the best communication quality from among the backup antennas based on the communication quality characterization parameters of each backup antenna when at least one of the target filter and frequency divider is detected, and to control the fourth antenna switching switch to open the path between the fixed connection terminal of the third antenna switching switch and the target backup antenna.

[0083] Figure 4 In this example, two backup antennas are used. However, the number and type of backup antennas can be varied as needed, and there are no restrictions on this. For example, there could be four backup antennas: DRX, Emergency Internal, MIMO1, and MIMO2.

[0084] Figure 4 In the middle, the modem 11 is also connected to the control terminal of the first antenna switch K1, the control terminal of the second antenna switch K2, the control terminal of the third antenna switch K3, and the control terminal of the fourth antenna switch K4.

[0085] When there are at least two backup antennas, the modem can select the target backup antenna with the best communication quality from among the backup antennas, and control the fourth antenna switch to open the path between the fixed connection terminal of the third antenna switch and the target backup antenna, ensuring that the target main transmitter / receiver module can transmit signals normally through the target backup antenna with the best communication quality for emergency calls. This guarantees the communication quality of emergency calls.

[0086] In one specific embodiment, such as Figure 5 As shown, the wireless communication module also includes at least one backup receiving module 16 and at least one fifth switching switch K5;

[0087] Modem 11 and backup receiver module 16 are connected in series; the first switching terminal of the fifth switching switch K5 is electrically connected to the backup receiver module 16, the second switching terminal is electrically connected to one switching terminal of the fourth antenna switching switch K4, and the fixed connection terminal is used to electrically connect to the backup antenna 30.

[0088] Figure 5In the embodiment, the number of the standby receiving module 16 is one, and the number of the fifth switch K5 is one. According to requirements, the number of the standby receiving module 16 and the number of the fifth switch K5 can also be other contents, which are not limited. For example, the number of the standby receiving module 16 is three, which are the auxiliary receiving module, the MIMO receiving module 1 and the MIMO receiving module 2 respectively, and the number of the fifth switch K5 is also three.

[0089] Figure 5 In the embodiment, the modem 11 is also connected to the control end of the first antenna switch K1, the control end of the second antenna switch K2, the control end of the third antenna switch K3, the control end of the fourth antenna switch K4 and the control end of the fifth switch K5.

[0090] The modem is configured to control the fifth switch to turn on a path between the standby receiving module and the standby antenna when it is detected that both the target filter and the frequency divider are normal; and control the fourth antenna switch to turn on a path between the fixed connection end of the third antenna switch and the second switch end of the fifth switch K5 corresponding to the target standby antenna, and control the fifth switch K5 to turn on a path between the second switch end and the fixed connection end, so as to turn on a path between the target main transmitting and receiving module and the target standby antenna when it is detected that at least one of the target filter and the frequency divider is faulty.

[0091] The fifth switch K5 can ensure that only one of the standby receiving module and the target main transmitting and receiving module can be connected to the standby antenna, and can avoid signal interference between the standby receiving module and the target main transmitting and receiving module.

[0092] Based on the same concept, the embodiment of the application provides an antenna switching system. The specific implementation of the antenna switching system can be referred to the description of the wireless communication module in the embodiment, and the repeated parts will not be described here, such as Figure 6 As shown in the figure, the antenna switching system includes the wireless communication module 10 provided in the embodiment, the main transmitting and receiving antenna 20 and the standby antenna 30.

[0093] Based on the same concept, the embodiment of the application provides an antenna switching method applied to the modem in the wireless communication module provided in the embodiment. The antenna switching method includes:

[0094] When it is detected that at least one of the target filter and the frequency divider is faulty, the antenna switching circuit is controlled to turn on a path between the target main transmitting and receiving module and the standby antenna.

[0095] The application sets the antenna switching circuit inside the wireless communication module, and the target main transceiver module and the target filter are electrically connected through the antenna switching circuit. When at least one of the target filter and the frequency divider fails, the modem can control the antenna switching circuit to turn on the path between the target main transceiver module and the standby antenna, without communicating through the target filter and the frequency divider. The wireless communication module can normally transmit signals for emergency calls through the modem, the target main transceiver module and the standby antenna, solving the problem that when at least one of the filters and the frequency dividers connected with the main transceiver module inside the wireless communication module fails, the signals in the wireless communication module cannot be normally transmitted for emergency calls.

[0096] In one embodiment, as shown in FIG. 7, the method for switching the antenna specifically includes the following steps: Figure 7

[0097] Step 701: receiving a communication quality characterization parameter of a main transceiver antenna and a communication quality characterization parameter of a standby antenna.

[0098] The communication quality characterization parameter is used to characterize the communication quality of the antenna. For example, the communication quality characterization parameter can be RSSI (Received Signal Strength Indicator, received signal strength indicator), and according to the need, the communication quality characterization parameter can also be other parameters. In this application, the communication quality characterization parameter is taken as RSSI for example.

[0099] For example, the standby antenna includes DRX, Emergency Internal, MIMO1 and MIMO2, but the number and specific types of the standby antenna are not limited.

[0100] The modem receives the communication quality characterization parameter of the main transceiver antenna and the communication quality characterization parameter of the standby antenna, which can be that the modem reads the RSSI of the main transceiver antenna, DRX, MIMO1 and MIMO2 in the running process, and then the modem controls the antenna switching circuit to turn on the path between the target main transceiver module and the Emergency Internal, and reads the RSSI of the Emergency Internal.

[0101] Step 702: determining that at least one of the target filter and the frequency divider fails according to the communication quality characterization parameter of the main transceiver antenna and the communication quality characterization parameter of the standby antenna.

[0102] ​In one embodiment, the determining of the failure of at least one of the target filter and the frequency divider based on the communication quality characterization parameter of the main transmitting and receiving antenna and the communication quality characterization parameter of the backup antenna comprises: determining the failure of at least one of the target filter and the frequency divider when a difference between the value of the communication quality characterization parameter of the backup antenna and the value of the communication quality characterization parameter of the main transmitting and receiving antenna is greater than a preset value.

[0103] The preset value can be an empirical value or a value obtained through multiple tests. For example, when the preset value is 20 dB, if the RSSI value of the backup antenna minus the RSSI value of the main transmitting and receiving antenna is greater than 20 dB, it indicates that at least one of the target filter and the frequency divider fails.

[0104] In step 703, the antenna switching circuit is controlled to turn on the path between the target main transmitting and receiving module and the backup antenna.

[0105] In one embodiment, when the failure of at least one of the target filter and the frequency divider is detected, the antenna switching circuit is controlled to turn on the path between the target main transmitting and receiving module and the backup antenna, which comprises: selecting a target backup antenna with the best communication quality from the backup antennas according to the communication quality characterization parameters of the backup antennas; and controlling the fourth antenna switching switch to turn on the path between the fixed connection end of the third antenna switching switch and the target backup antenna.

[0106] When the number of backup antennas is at least two, the modem can select a target backup antenna with the best communication quality from the backup antennas, and control the fourth antenna switching switch to turn on the path between the fixed connection end of the third antenna switching switch and the target backup antenna, so as to ensure that the target main transmitting and receiving module can normally transmit signals through the target backup antenna with the best communication quality for emergency calls, thereby ensuring the communication quality of the emergency calls.

[0107] In one embodiment, before the antenna switching circuit is controlled to turn on the path between the target main transmitting and receiving module and the backup antenna, the antenna switching method further comprises: receiving an emergency call request. After the antenna switching circuit is controlled to turn on the path between the target main transmitting and receiving module and the backup antenna, the antenna switching method further comprises: establishing an emergency call connection between the wireless communication module and the rescue device through the backup antenna.

[0108] The emergency call request received by the modem can be an emergency call request automatically triggered by the vehicle when a collision occurs, or an emergency call request manually triggered by the vehicle owner. The rescue device can be a PSAP (Public Safety Answering Point, Public Safety Answering Point) or a rescue mobile terminal.

[0109] After receiving the emergency call request, the antenna switching circuit is controlled to connect the target main transceiver module and the spare antenna when at least one of the target filter and the frequency divider is detected to be faulty. The modem can continuously detect whether the target filter or the frequency divider is faulty during operation, and the antenna switching circuit is controlled to connect the target main transceiver module and the spare antenna when at least one of the target filter and the frequency divider is detected to be faulty, thereby reducing the power consumption of the modem.

[0110] In one embodiment, as shown in FIG. 8, the method of antenna switching specifically includes the following steps: Figure 8

[0111] Step 801, receiving an emergency call request.

[0112] Step 802, reading the RSSI of PRX, DRX, MIMO1 and MIMO2.

[0113] Step 803, controlling the antenna switching circuit to connect the target main transceiver module and the Emergency Internal.

[0114] Step 804, reading the RSSI of the Emergency Internal.

[0115] Step 805, determining that at least one of the target filter and the frequency divider is faulty according to the RSSI of PRX, DRX, MIMO1, MIMO2 and Emergency Internal.

[0116] Step 806, selecting the target spare antenna with the best communication quality from DRX, MIMO1, MIMO2 and Emergency Internal according to the RSSI of DRX, MIMO1, MIMO2 and Emergency Internal.

[0117] Step 807, controlling the antenna switching circuit to connect the target main transceiver module and the target spare antenna.

[0118] Step 808, establishing an emergency call connection between the wireless communication module and the rescue equipment through the target spare antenna.

[0119] ​It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0120] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, which modifications and changes are to be understood as intended to be encompassed by the general scope of the application. Accordingly, the application is not to be limited to the above described or illustrated embodiments that are merely given by way of example. It is also be understood that various combinations of the above described embodiments and variations thereof are encompassed by the application.

Claims

1. A wireless communication module, characterized by The modulator, the target main transceiver module, the antenna switching circuit, the target filter and the frequency divider are sequentially connected in series. The modulator, the target main transceiver module, the target filter and the frequency divider are sequentially connected in series. The modulator is configured to control the antenna switching circuit to turn on a path between the target main transceiver module and the backup antenna when detecting a fault of at least one of the target filter and the frequency divider. The modulator is configured to receive a communication quality characterization parameter of the main transceiving antenna and a communication quality characterization parameter of the backup antenna, and determine the fault of at least one of the target filter and the frequency divider according to the communication quality characterization parameter of the main transceiving antenna and the communication quality characterization parameter of the backup antenna, the communication quality characterization parameter being a received signal strength indication (RSSI).

2. The wireless communication module of claim 1, wherein, The modulator is specifically configured to determine the fault of at least one of the target filter and the frequency divider when a difference between a value of the communication quality characterization parameter of the backup antenna and a value of the communication quality characterization parameter of the main transceiving antenna is greater than a preset value.

3. The wireless communication module of claim 1, wherein, The target main transceiver module includes a low-frequency main transceiver module or a medium-high-frequency main transceiver module. The antenna switching circuit includes an antenna switching switch.

4. The wireless communication module of claim 1, wherein, The target main transceiver module includes a low-frequency main transceiver module and a medium-high-frequency main transceiver module. The antenna switching circuit includes a first antenna switching switch, a second antenna switching switch and a third antenna switching switch, and the target filter includes a first filter and a second filter. The modulator, the low-frequency main transceiver module, the first filter and the frequency divider are sequentially connected in series, and the low-frequency main transceiver module and the first filter are electrically connected through the first antenna switching switch; the modulator, the medium-high-frequency main transceiver module, the second filter and the frequency divider are sequentially connected in series, and the medium-high-frequency main transceiver module and the second filter are electrically connected through the second antenna switching switch; a fixed connection end of the first antenna switching switch is electrically connected to the low-frequency main transceiver module, a first switching end is electrically connected to the first filter, and a second switching end is electrically connected to a first switching end of the third antenna switching switch; a fixed connection end of the second antenna switching switch is electrically connected to the medium-high-frequency main transceiver module, a first switching end is electrically connected to the second filter, and a second switching end is electrically connected to a second switching end of the third antenna switching switch; and a fixed connection end of the third antenna switching switch is electrically connected to the backup antenna.

5. The wireless communication module of claim 4, wherein, The antenna switching circuit further comprises a fourth antenna switching switch, wherein the number of the standby antennas is at least two; a fixed connection end of the third antenna switching switch is connected to a fixed connection end of the fourth antenna switching switch, and each switching end of the fourth antenna switching switch is used for electrically connecting different standby antennas; The modem is specifically configured to, when detecting at least one fault in the target filter and the frequency divider, select a target standby antenna with the best communication quality from the standby antennas according to the communication quality characteristic parameters of the standby antennas, and control the fourth antenna switching switch to turn on a path between the fixed connection end of the third antenna switching switch and the target standby antenna.

6. The wireless communication module of claim 5, wherein, The wireless communication module further comprises at least one standby receiving module and at least one fifth switching switch; The modem and the standby receiving module are connected in series, a first switching end of the fifth switching switch is electrically connected to the standby receiving module, a second switching end is electrically connected to one switching end of the fourth antenna switching switch, and a fixed connection end is used for electrically connecting the standby antennas.

7. An antenna switching system, characterized by The wireless communication module comprises a main transmitting and receiving antenna, a standby antenna, and the wireless communication module of any one of claims 1 to 6.

8. An antenna switching method, characterized by, The antenna switching method applied to the modem of the wireless communication module of any one of claims 1 to 6, the antenna switching method comprising: When detecting at least one fault in the target filter and the frequency divider, controlling the antenna switching circuit to turn on a path between the target main transmitting and receiving module and the standby antenna; The detection of at least one fault in the target filter and the frequency divider comprises: receiving a communication quality characteristic parameter of the main transmitting and receiving antenna and a communication quality characteristic parameter of the standby antenna; determining at least one fault in the target filter and the frequency divider according to the communication quality characteristic parameter of the main transmitting and receiving antenna and the communication quality characteristic parameter of the standby antenna, the communication quality characteristic parameter being a received signal strength indication RSSI.

9. The antenna switching method of claim 8, wherein, The determination of at least one fault in the target filter and the frequency divider according to the communication quality characteristic parameter of the main transmitting and receiving antenna and the communication quality characteristic parameter of the standby antenna comprises: In a case where a difference value obtained by subtracting a value of the communication quality characteristic parameter of the main transmitting and receiving antenna from a value of the communication quality characteristic parameter of the standby antenna is greater than a preset value, it is determined that at least one fault in the target filter and the frequency divider.

10. The antenna switching method of claim 8, wherein, The wireless communication module comprises the antenna switching circuit, and the antenna switching circuit comprises a third antenna switching switch and a fourth antenna switching switch; The control of the antenna switching circuit to turn on a path between the target main transmitting and receiving module and the standby antenna when detecting at least one fault in the target filter and the frequency divider comprises: selecting a target standby antenna with the best communication quality from the standby antennas according to the communication quality characteristic parameters of the standby antennas; and Controlling the fourth antenna switch to turn on a path between the fixed connection end of the third antenna switch and the target backup antenna.

11. The antenna switching method of claim 8, wherein, Before the controlling the antenna switching circuit to turn on the path between the target main transceiving module and the backup antenna, the method further comprises: receiving an emergency call request; After the controlling the antenna switching circuit to turn on the path between the target main transceiving module and the backup antenna, the method further comprises: establishing an emergency call connection between the wireless communication module and a rescue device through the backup antenna.

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