Data transmission method and device

Abstract

The present disclosure relates to a data transmission method and device, the method is applied to the host computer of TBOX, the vehicle-mounted TBOX also includes a wireless communication module, the wireless communication module is registered in the IMS network, the method includes: in response to the hang-up message of the emergency call, sending a request to disable the IMS network to the wireless communication module so that the wireless communication module cancels the registration in the IMS network; in response to the callback message corresponding to the emergency call, notifying the wireless communication module to send MSD to the public service answering point PSAP. The data transmission method and device provided by the present disclosure can realize the CS domain MSD transmission in the callback stage of the eCall service under the IMS network environment.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a data transmission method and device. Background Art

[0002] The vehicle-mounted telematics box (TBOX) has an on-board emergency call (eCall) function. During road transportation, users can manually start the eCall function of the vehicle-mounted TBOX, and the vehicle-mounted TBOX can automatically start its eCall function when an accident occurs. When the eCall function is started, the TBOX will actively or backwardly call the public service answering point (PSAP) for emergency help. After the vehicle-mounted communication device establishes an emergency call connection with the PSAP, the vehicle-mounted communication device can send the minimum set of data (MSD) for reflecting the accident information to the PSAP. The PSAP can quickly launch rescue based on the received MSD, thereby reducing casualties. After the emergency call ends, the TBOX enters the waiting call back stage. During this stage, if a call back initiated by the PSAP is received, the TBOX will automatically connect the call back and send the MSD to the PSAP again.

[0003] Due to the hysteresis and long cycle of vehicle-mounted products, the vehicle-mounted TBOX only supports the transmission of MSD in the Circuit Switched (CS) domain, but does not support the direct transmission of MSD in the PS domain. In the Internet Protocol Multimedia Subsystem (IMS) network environment, both data and voice are transmitted in the Packet Switch (PS) domain. This results in: in the IMS network environment, the vehicle-mounted BOX that only supports the transmission of MSD in the CS domain cannot receive the callback initiated by the PSAP, and cannot send MSD to the PASP again, thus affecting the continuity of the eCall service. Summary of the invention

[0004] In view of this, a data transmission method and device are proposed, which can realize CS domain MSD transmission in the call back phase of eCall service in an IMS network environment.

[0005] In the first aspect, an embodiment of the present disclosure provides a data transmission method, which is applied to a host computer of a vehicle-mounted remote communication box TBOX, wherein the vehicle-mounted TBOX also includes a wireless communication module, and the wireless communication module is registered in an Internet Protocol Multimedia Subsystem IMS network. The method includes: in response to a hang-up message of an emergency call, sending a request to disable the IMS network to the wireless communication module so that the wireless communication module cancels its registration in the IMS network; in response to a call-back message corresponding to the emergency call, notifying the wireless communication module to send a minimum data set MSD to a public service answering point PSAP.

[0006] According to the first aspect, in a first possible implementation of the data transmission method, the method further includes: in response to the hang-up message of the emergency call, starting a timer and setting a timing limit; when the timing time of the timer reaches the timing limit, sending a request to register the IMS network to the wireless communication module, so that the wireless communication module is registered in the IMS network. By setting the timer, the length of time for waiting for a callback can be flexibly controlled, thereby flexibly controlling the length of time for disabling the IMS network, which is conducive to maintaining a smoother network environment and reducing the impact on other services other than the eCall service.

[0007] According to a first possible implementation of the first aspect, in a second possible implementation of the data transmission method, in response to the callback message corresponding to the emergency call, notifying the wireless communication module to send the MSD to the PSAP includes: in response to the callback message corresponding to the emergency call, notifying the wireless communication module to send the MSD to the PSAP when the timing time of the timer does not reach the timing time limit. In this way, the operator of the PSAP can be kept up to date with the latest situation.

[0008] According to the first method, in a third possible implementation of the data transmission method, the method further comprises: sending an emergency call request to the wireless communication module, wherein the emergency call request includes a circuit domain fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the circuit switched CS domain, and sends the MSD to the PSAP through the voice communication link. In this way, by actively falling back the emergency call to the CS domain, the transmission of the MSD in the CS domain can be achieved.

[0009] According to the third implementation of the first method, in the fourth implementation of the data transmission method, sending the emergency call request to the wireless communication module includes: sending the emergency call request to the wireless communication module when receiving a trigger message of the emergency call control or a collision message sent by the collision detection device. In this way, when an emergency occurs, help can be requested in time.

[0010] In the second aspect, an embodiment of the present disclosure provides a data transmission device, which is applied to a host computer of a vehicle-mounted remote communication box TBOX. The vehicle-mounted TBOX also includes a wireless communication module, and the wireless communication module is registered in the Internet Protocol Multimedia Subsystem IMS network. The device includes: a first sending module, which is used to respond to a hang-up message of an emergency call and send a request to disable the IMS network to the wireless communication module so that the wireless communication module cancels its registration in the IMS network; a notification module, which is used to respond to a callback message corresponding to the emergency call sent by the first sending module, and notify the wireless communication module to send a minimum data set MSD to a public service answering point PSAP.

[0011] According to the second aspect, in a first possible implementation method of the data transmission device, the device also includes: a starting module, used to start a timer and set a timing limit in response to a hang-up message of the emergency call; a second sending module, used to send a request to register the IMS network to the wireless communication module when the timing time of the timer reaches the timing limit, so that the wireless communication module is registered in the IMS network.

[0012] According to a first possible implementation method of the second aspect, in a second possible implementation method of the data transmission device, the notification module is also used to: when the timing time of the timer has not reached the timing limit, in response to the callback message corresponding to the emergency call, notify the wireless communication module to send MSD to PSAP.

[0013] According to the second aspect, in a third possible implementation method of the data transmission device, the device also includes: a third sending module, used to send an emergency call request to the wireless communication module, the emergency call request includes a circuit switch fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the circuit switched CS domain, and sends an MSD to the PSAP through the voice communication link.

[0014] According to a third possible implementation manner of the second aspect, in a fourth possible implementation manner of the data transmission device, the third sending module is further configured to: upon receiving a trigger message of an emergency call control or a collision message sent by a collision detection device, send the emergency call request to the wireless communication module. .

[0015] In a third aspect, an embodiment of the present disclosure provides an apparatus for data transmission, and the terminal device can execute the data transmission method of the above-mentioned first aspect or one or more of the multiple possible implementation methods of the first aspect.

[0016] In a fourth aspect, an embodiment of the present disclosure provides a computer program product, including a computer-readable code, or a non-volatile computer-readable storage medium carrying a computer-readable code. When the computer-readable code is executed in an electronic device, a processor in the electronic device executes the data transmission method of the above-mentioned first aspect or one or more of the multiple possible implementation methods of the first aspect.

[0017] These and other aspects of the present disclosure will become more apparent from the following description of the embodiment(s).

[0018] In the disclosed embodiment, when waiting for the callback stage to begin, the host computer of the vehicle-mounted TBOX sends a request to disable the IMS network to the wireless communication module so that the network of the wireless communication module is under the LTE network. In this way, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving the callback request, thereby transmitting the MSD in the CS domain, realizing the continuity of the eCall service without affecting other data services. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

[0020] Figure 1 A schematic diagram showing the architecture of the eCall system is shown;

[0021] Figure 2 A schematic diagram showing changes in the network of the vehicle-mounted TBOX during the eCall process when the external network environment is the LTE network;

[0022] Figure 3 A schematic diagram showing changes in the network of the vehicle-mounted TBOX during the eCall process when the external network environment is an IMS network;

[0023] Figure 4a An exemplary structural diagram of a vehicle-mounted TBOX according to an embodiment of the present disclosure is shown;

[0024] Figure 4b Another exemplary structural schematic diagram of a vehicle-mounted TBOX according to an embodiment of the present disclosure is shown;

[0025] Figure 5 A flowchart of a data transmission method provided according to an embodiment of the present disclosure is shown;

[0026] Figure 6 A schematic diagram showing changes in the network of the vehicle-mounted TBOX during the eCall process according to an embodiment of the present disclosure when the external network environment is an IMS network;

[0027] Figure 7 A flowchart of a data transmission method provided according to an embodiment of the present disclosure is shown;

[0028] Figure 8 A flowchart of a data transmission method provided according to an embodiment of the present disclosure is shown;

[0029] Fig. 9 An interactive schematic diagram showing a data transmission method according to an embodiment of the present disclosure;

[0030] Fig.10 A schematic diagram of the structure of a data transmission device provided according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0032] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0033] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0034] Figure 1 FIG. 1 shows a schematic diagram of the architecture of the eCall system. Figure 1As shown, the eCall system includes an accident vehicle and a PSAP. Among them, the accident vehicle is integrated with a vehicle-mounted TBOX (not shown). In the event of an accident, the accident vehicle can initiate an emergency call through the vehicle-mounted TBOX. After the operator of the PSAP connects to the emergency call, a voice communication link is established between the vehicle-mounted TBOX and the PSAP through a wireless network. The vehicle-mounted TBOX can send MSD and voice to the PSAP through the voice communication link. Among them, the MSD may include information such as the geographic location, driving direction, trigger mode (automatic or manual) and vehicle identification number of the accident vehicle. In one example, the maximum MSD is 140 bytes. The operator of the PSAP can understand the situation of the accident vehicle based on the received MSD. The operator of the PSAP can also hear what is happening in the car based on the received voice, and communicate with the people in the car by voice to further understand the situation at the scene of the accident. Afterwards, the operator of the PSAP can dispatch rescue vehicles (such as ambulances, fire trucks, and police cars, etc.) to the scene of the accident to provide medical and other life-saving rescue to the victims of the accident in a timely manner.

[0035] After the emergency call is hung up (not shown), the PSAP can call back the accident vehicle to update the situation at the accident site and adjust the rescue strategy and plan in time. The vehicle-mounted TBOX can automatically connect the call back and send the MSD to the PSAP again.

[0036] Figure 2 FIG. 1 is a schematic diagram showing changes in the network of the vehicle-mounted TBOX during the eCall process when the external network environment is a Long Term Evolution (LTE) network. Figure 2As shown, before the emergency call is triggered (manually or automatically), the external network environment of the vehicle-mounted TBOX is the LTE network, and the vehicle-mounted TBOX is registered in the LTE network. When the emergency call is triggered, the vehicle-mounted TBOX automatically circuit switches back (CSFB) to the second generation mobile communication technology / third generation mobile communication technology (2nd Generation wireless telephone technology / 3rd Generation wireless telephone technology, 2G / 3G) network to initiate the emergency call. The vehicle-mounted TBOX and PSAP establish a voice communication link for the emergency call in the CS domain. The vehicle-mounted TBOX transmits the MSD through the voice communication link of the emergency call. After the PSAP hangs up the emergency call, the voice communication link of the emergency call is disconnected, and the vehicle-mounted TBOX enters the waiting callback state and automatically recovers to the LTE network. When the vehicle-mounted TBOX is in the waiting callback state, the vehicle-mounted TBOX can automatically CSFB to the 2G / 3G network to answer the callback when receiving the callback for the emergency call, thereby establishing a voice communication link for the callback with the PSAP in the CS domain. After that, the vehicle-mounted TBOX can transmit the MSD through the voice communication link of the callback. After the PSAP hangs up the callback, the voice communication link of the callback is disconnected, and the vehicle-mounted TBOX enters the waiting callback state again and automatically recovers to the LTE network. When the vehicle-mounted TBOX exits the waiting callback state, the vehicle-mounted TBOX continues to stay in the LTE network.

[0037] It should be noted that the current in-vehicle emergency calls in Asia are generally private emergency calls, which are essentially ordinary voice calls. The voice communication link established uses Figure 2 In Europe and America, there is a special emergency call channel, channel 112, and the established voice communication link uses Figure 2 Emergency call channels shown.

[0038] With the popularization of IMS network, the external network environment of vehicle-mounted TBOX is a situation where 2G / 3G network, LTE network and IMS network coexist. Under the IMS network, the phone dialed by private emergency call (ordinary voice call) is a Voice Over Long Term Evolution (VOLTE) phone established under IMS, and its voice is transmitted through the PS domain. Therefore, when the external network environment is the IMS network, the emergency call and callback established between the vehicle-mounted TBOX and PSAP are on the PS domain. This results in the vehicle-mounted TBOX being able to transmit MSD through the PS domain, but unable to transmit MSD through the CS domain.

[0039] Figure 3 The figure shows the changes of the network of the vehicle-mounted TBOX during the eCall process when the external network environment is the IMS network. Figure 3 As shown, before the emergency call is triggered, the external network environment of the vehicle-mounted TBOX is the IMS network, and the vehicle-mounted TBOX is registered in the IMS network. When the emergency call is triggered, the vehicle-mounted TBOX actively CSFBs to the 2G / 3G network to initiate the emergency call. The vehicle-mounted TBOX and PSAP establish a voice communication link for the emergency call in the CS domain. The vehicle-mounted TBOX transmits MSD through the voice communication link for the emergency call. After the PSAP hangs up the emergency call, the voice communication link for the emergency call is disconnected, the vehicle-mounted TBOX enters the waiting callback state, and automatically recovers to the IMS network. Since the network of the vehicle-mounted TBOX is the IMS network, when the vehicle-mounted TBOX receives the callback for the emergency call in the waiting callback state, it directly answers the callback in the IMS network, and does not support CSBF to the 2G / 3G network to answer the callback. In this way, the vehicle-mounted TBOX and PSAP establish a voice communication link for the emergency call in the PS domain, which results in the vehicle-mounted TBOX being able to transmit MSD through the PS domain, but unable to transmit MSD through the CS domain.

[0040] Due to the hysteresis and long cycle of vehicle-mounted products, there are currently vehicle-mounted BOXes that only support or are required by customers to support MSD transmission in the form of in-band modem (i.e., MSD transmission in the CS domain). For such vehicle-mounted BOXes, when the external network environment is an IMS network, the MSD transmission will fail during the call-back phase, and the continuity of the eCall service cannot be achieved, which makes it difficult for the PSAP operator to update the situation at the accident site in a timely manner, which has an adverse impact on rescue.

[0041] In the related art, in order to enable the vehicle-mounted TBOX to realize the MSD transmission in the CS domain during the call-back stage when the external network environment is an IMS network, the following method is used for processing: when the vehicle-mounted TBOX enters the waiting state for the call-back, the network of the vehicle-mounted TBOX is locked in the 2G / 3G network instead of automatically restoring to the IMS network. In this way, when the vehicle-mounted TBOX receives the call-back, it can establish a call-back voice communication connection with the PSAP in the CS domain, and then transmit the MSD through the call-back voice communication connection, so as to realize the transmission of the CS domain MSD in the call-back stage. However, this method of locking the network of the vehicle-mounted TBOX in the 2G / 3G network during the call-back stage will affect other services that require data transmission in the PS domain and even completely fail to function, for example, it is impossible to view maps, it is impossible to initiate instant messaging (such as making video calls), etc., which does not meet customer specifications.

[0042] The disclosed embodiment provides a data transmission method, which can realize MSD transmission in the CS domain in the call back phase of the vehicle-mounted TBOX when the external network environment is an IMS network, without affecting other data services.

[0043] Figure 4a FIG. 2 shows an exemplary structural diagram of a vehicle-mounted TBOX according to an embodiment of the present disclosure. Figure 4a As shown, the vehicle-mounted TBOX 10 may include a host computer 111 and a wireless communication module 112. The host computer 111 may be used to initiate an emergency call, control the wireless communication module 112 to deregister and register with the IMS network, and control the wireless communication module 112 to transmit the MSD. The wireless communication module 112 may be used to establish a voice communication link with the PSAP, and transmit the MSD to the PSAP through the established voice communication link. The host computer 111 and the wireless communication module 112 may correspond to the application layer and the protocol layer, respectively, or may correspond to the chip function layer and the chip wireless communication layer, respectively.

[0044] Figure 4b FIG. 2 shows another exemplary structural diagram of a vehicle-mounted TBOX according to an embodiment of the present disclosure. Figure 4b As shown, the vehicle-mounted TBOX 30 may include a TBOX application layer 31 and a TBOX MCU 32. Among them, the TBOX application layer 31 may include a host computer 311, a wireless communication module 312 and an MSD module 313. Among them, the host computer 311 can be used to initiate an emergency call, control the wireless communication module 312 to deregister and register with the IMS network, and control the wireless communication module 312 to transmit MSD. The wireless communication module 312 can be used to establish a voice communication link with the PSAP, and transmit the MSD to the PSAP through the established voice communication link. The MSD module 313 is used to collect the MSD through the TBOX microcontroller unit (MCU) 32.

[0045] like Figure 4bAs shown, the TBOX application layer 31 and the TBOX MCU 32 transmit data through the general purpose input and output (GPIO) interface and the serial peripheral interface (SPI). The TBOX MCU 32 can be connected to the vehicle computer through Ethernet to obtain the vehicle computer voice configuration items, or the language information obtained by the vehicle computer through voice recognition. The TBOX MCU 32 can also obtain vehicle body messages, such as collision messages, through the controller area network (CAN) network. The TBOX MCU 32 can also obtain voice messages output from other modules of the vehicle body through the CAN network. The TBOX MCU 32 is also connected to a microphone and a speaker, collects voice messages from the occupants through the microphone, and broadcasts voice messages to the occupants through the speaker, thereby realizing a voice conversation between the occupants and the operator of the PSAP.

[0046] The TBOX application layer 31 may also include a microprocessor (not shown), which may include one or more processing units, for example: the processor includes an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a memory, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural network processor (Neural-network Processing Unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. Among them, the controller can be the nerve center and command center of the vehicle-mounted TBOX. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.

[0047] A memory may also be provided in the microprocessor for storing instructions and data. In some embodiments, the memory in the microprocessor is a cache memory. The memory may store instructions or data that the microprocessor has just used or is cyclically using. If the microprocessor needs to use the instruction or data again, it may be directly called from the memory. Repeated access is avoided, the waiting time of the microprocessor is reduced, and the efficiency of the system is improved.

[0048] The microprocessor can run the data transmission method provided by the embodiment of the present disclosure, so that when the external network environment is an IMS network, the vehicle-mounted TBOX can realize MSD transmission in the CS domain during the call-back phase without affecting other data services. The microprocessor can include different devices, such as when a CPU and a GPU are integrated, the CPU and the GPU can cooperate to execute the data transmission method provided by the embodiment of the present disclosure, such as part of the algorithm in the data transmission method is executed by the CPU, and another part of the algorithm is executed by the GPU, so as to obtain faster processing efficiency.

[0049] After the microprocessor runs the data transmission method provided by the embodiment of the present disclosure, the wireless communication module 312 can establish a connection with the PSAP through the antenna and transmit the MSD according to the data transmission method provided by the embodiment of the present disclosure.

[0050] The TBOX application layer 31 may also include an internal memory (not shown). The internal memory may be used to store computer executable program codes, which include instructions. The microprocessor executes various functional applications and data processing of the TBOX application layer 31 by running the instructions stored in the internal memory. The internal memory may include a program storage area and a data storage area. The program storage area may store codes of an operating system, an application program (such as an eCall application, etc.), etc. The data storage area may store data (such as MSD, etc.) created during the use of the vehicle-mounted TBOX, etc.

[0051] The internal memory may also store one or more computer programs corresponding to the data transmission method provided in the embodiment of the present disclosure. The one or more computer programs are stored in the above-mentioned memory and are configured to be executed by the above-mentioned one or more microprocessors, and the one or more computer programs include instructions, and the above-mentioned instructions can be used to execute the various steps of the data transmission method according to the embodiment of the present disclosure.

[0052] The wireless communication module 312 can provide solutions for wireless communication including 2G, 3G, LTE, IMS, etc. applied to the vehicle-mounted TBOX 30. The wireless communication module 312 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The wireless communication module 312 can receive electromagnetic waves by an antenna (not shown), and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The wireless communication module 312 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves and radiate it through the antenna. In some embodiments, at least some of the functional modules of the wireless communication module 312 can be set in a microprocessor. In some embodiments, at least some of the functional modules of the wireless communication module 312 can be set in the same device as at least some of the modules of the microprocessor. In the embodiment of the present disclosure, the wireless communication module 312 can be used to interact with PSAP and other terminal devices (such as mobile phones, tablets, personal computers, etc.) for information. For example, the wireless communication module 312 can be used for voice dialogue and MSD transmission with PASP.

[0053] The modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to a speaker, a microphone, etc.), or displays an image or video through a display screen. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the microprocessor and be set in the same device as the wireless communication module 312 or other functional modules.

[0054] It is understood that the structure illustrated in the embodiment of the present disclosure does not constitute a specific limitation on the vehicle-mounted TBOX. In other embodiments of the present disclosure, the vehicle-mounted TBOX may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0055] Figure 5 A flow chart of a data transmission method provided according to an embodiment of the present disclosure is shown. Figure 5 The data transmission method shown can be applied to the host computer of the vehicle-mounted TBOX, for example, Figure 4a The host computer 111 shown, or Figure 4b The upper computer 311 vehicle-mounted TBOX shown also includes a wireless communication module, such as Figure 4aThe wireless communication module 112 and Figure 4b The wireless communication module 312 is shown, and the wireless communication module is registered in the IMS network. Figure 5 As shown, the data transmission method provided by the embodiment of the present disclosure may include:

[0056] Step S101: in response to a hang-up message of an emergency call, sending a request for disabling an IMS network to the wireless communication module, so that the wireless communication module cancels registration in the IMS network.

[0057] Step S102: In response to the callback message corresponding to the emergency call, the wireless communication module is notified to send a minimum data set MSD to a public service answering point PSAP.

[0058] In the disclosed embodiment, when waiting for the callback stage to begin, the host computer of the vehicle-mounted TBOX sends a request to disable the IMS network to the wireless communication module so that the network of the wireless communication module is under the LTE network. In this way, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving the callback request, thereby transmitting the MSD in the CS domain, realizing the continuity of the eCall service without affecting other data services.

[0059] In step S101, the emergency call can be initiated by the wireless communication module. After the PSAP connects the emergency call, a voice communication link for the emergency call can be established between the wireless communication module and the PSAP. When the voice communication link for the emergency call is disconnected (i.e., the PSAP hangs up the emergency call), the wireless communication module can send a hang-up message for the emergency call to the host computer. When the host computer receives the hang-up message for the emergency call, it can be determined that the current waiting call-back stage has been entered.

[0060] In one possible implementation, the host computer can send an emergency call request to the wireless communication module, and the emergency call request includes a circuit domain fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the CS domain, and sends MSD to the PSAP through the voice communication link.

[0061] In some examples, the emergency call may be triggered manually: upon receiving a trigger message of the emergency call control, the host computer may send the emergency call request to the wireless communication module so that the wireless communication module initiates the emergency call.

[0062] For example, if Figure 4bAs shown, the TBOX MCU can be connected to the emergency call control. When the emergency call control is triggered, the TBOX MCU 32 can send the trigger message of the emergency call control to the host computer 311. At this time, the host computer 311 can send an emergency call request to the wireless communication module 312. Among them, the emergency call control can be set in a position such as a center console or a rearview mirror. The emergency call control can be a physical button or a virtual button on a touch screen. The embodiment of the present disclosure does not limit the emergency call control.

[0063] In some examples, the emergency call may be automatically triggered: upon receiving a collision message sent by a collision detection device, the host computer may send the emergency call request to the wireless communication module, so that the wireless communication module initiates the emergency call.

[0064] For example, if Figure 4b As shown, the TBOX MCU 32 is connected to the vehicle body via CAN. The vehicle body is provided with a collision detection device, such as a gyroscope sensor, an acceleration sensor, a pressure sensor, a distance sensor, and a temperature sensor. When the collision detection device detects a collision, it sends a collision message to the TBOX MCU 32 via CAN. The TBOX MCU 32 sends the collision message to the host computer 311. When the host computer receives the collision message, it can send an emergency call request to the wireless communication module 312.

[0065] The host computer can instruct the wireless communication module to initiate an emergency call through an emergency call request. In the disclosed embodiment, in order to realize the transmission of MSD in the CS domain, the host computer can add a CSFB instruction in the emergency call request to instruct the wireless communication module to automatically CSFB to the 2G / 3G network to initiate an emergency call, so that the wireless communication module can establish a voice communication link for the emergency call with the PSAP in the CS domain. In this way, when the wireless communication module transmits MSD through the voice communication link of the emergency call, the transmission of MSD in the CS domain is realized.

[0066] After the emergency call is hung up, the waiting for callback phase begins. At this time, the wireless communication module can send the emergency call hang-up message to the host computer. In response to the emergency call hang-up message, the host computer determines that the current waiting for callback phase has begun, and sends a request to disable the IMS network to the Wuxiang communication module. After receiving the request to disable the IMS network, the wireless communication module can cancel the registration in the IMS network and enter the LTE network.

[0067] In step S102, the callback of the emergency call can be initiated by PSAP. When the wireless communication module receives the callback request, it can automatically connect to the emergency callback and establish a voice communication link for the callback with PASP. When the wireless communication module connects the callback, the wireless communication module can send a callback message to the host computer. When the host computer receives the callback message, it can be determined that the callback stage has been entered and MSD transmission can be performed. Therefore, in response to the callback message corresponding to the emergency call, the host computer can send MSD to PSAP through the wireless communication module.

[0068] Considering that under the LTE network, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving a voice call request. Therefore, when the wireless communication module cancels the registration in the IMS network and enters the LTE network, the wireless communication module can automatically CSFB to the 2G / 3G network to connect the call back when receiving the callback of the emergency call initiated by the PSAP, thereby establishing a voice communication link of the call back with the PSAP in the CS domain. In this way, when the wireless communication module transmits MSD through the voice communication link of the call back, it realizes the transmission of MSD in the CS domain. At the same time, considering that under the LTE network, the wireless communication module can perform data transmission in the PS domain, therefore, after the wireless communication module cancels the registration in the IMS network, it will not affect other data services, and the data service will operate normally in the call back waiting stage and the call back stage.

[0069] Figure 6 FIG. 2 shows a schematic diagram of changes in the network of the vehicle-mounted TBOX during the eCall process according to an embodiment of the present disclosure when the external network environment is an IMS network. Figure 6As shown, before the emergency call is triggered, the external network environment of the vehicle-mounted TBOX (wireless communication module) is IMS, and the vehicle-mounted TBOX (wireless communication module) is registered in the LTE network. When the emergency call is triggered, the vehicle-mounted TBOX (wireless communication module) actively CSFBs to the 2G / 3G network to initiate an emergency call. The vehicle-mounted TBOX (wireless communication module) and PSAP establish a voice communication link for the emergency call in the CS domain. The vehicle-mounted TBOX (wireless communication module) transmits MSD through the voice communication link of the emergency call. After the PSAP hangs up the emergency call, the voice communication link of the above-mentioned emergency call is disconnected, and the vehicle-mounted TBOX (wireless communication module) enters a waiting callback state. At this point, the vehicle-mounted TBOX (wireless communication module) first automatically recovers from the 2G / 3G network to the IMS network, and then enters the LTE network after canceling the IMS network according to step S101 of the embodiment of the present disclosure. When the vehicle-mounted TBOX (wireless communication module) is in the waiting state for callback, the vehicle-mounted TBOX (wireless communication module) can automatically CSFB to the 2G / 3G network to answer the callback when receiving the callback for the emergency call, thereby establishing a voice communication link for the callback with the PSAP in the CS domain. Afterwards, according to step S102 of the embodiment of the present disclosure, the vehicle-mounted TBOX (wireless communication module) can transmit MSD through the voice communication link for the callback. After the PSAP hangs up the callback, the voice communication link for the callback is disconnected, and the vehicle-mounted TBOX (wireless communication module) enters the waiting state for callback again and automatically recovers to the LTE network. When the vehicle-mounted TBOX (wireless communication module) exits the callback waiting state, the vehicle-mounted TBOX (wireless communication module) re-registers the IMS network.

[0070] like Figure 6 As shown, from the time when the on-board TBOX (the wireless communication module) enters the callback waiting state to the time when the on-board TBOX exits the callback waiting state, the on-board TBOX (the wireless communication module) can automatically perform CSFB, realize voice calls and MSD transmission in the CS domain, ensure the continuity of the eCall service, and realize data transmission in the PS domain at the same time, reducing the impact on other data services.

[0071] Figure 7 FIG. 1 is a flow chart showing a data transmission method according to an embodiment of the present disclosure. Figure 7 As shown, Figure 5 The method shown may further include step S103 and step S104.

[0072] Step S103, in response to the hang-up message of the emergency call, starting a timer and setting a timing limit.

[0073] Step S104: When the timing time of the timer reaches the timing limit, a request for registering the IMS network is sent to the wireless communication module, so that the wireless communication module is registered in the IMS network.

[0074] After receiving the hang-up message of the emergency call, the host computer can start the timer, indicating that the wireless communication module of the vehicle-mounted TBOX enters the waiting call back state. In the embodiment of the present disclosure, a time limit can be set for the timer, and the time limit represents the length of time for the waiting call back stage. The time limit can be set as needed, for example, it can be set to 30 minutes, 1 hour or 2 hours, etc., and the present disclosure does not limit this.

[0075] When the timer reaches the time limit, it indicates that the waiting callback stage is over, and the wireless communication module of the vehicle-mounted TBOX exits the waiting callback state. At this time, the host computer can send a request to register the IMS network to the wireless communication module, so that the wireless communication module re-registers in the IMS network.

[0076] In the disclosed embodiment, by setting a timer, the length of time for waiting for a callback can be flexibly controlled, thereby flexibly controlling the length of time for disabling the IMS network, which is conducive to maintaining a smoother network environment and reducing the impact on other services besides the eCall service.

[0077] Figure 8 FIG. 1 is a flow chart showing a data transmission method according to an embodiment of the present disclosure. Figure 8 As shown, Figure 7 The illustrated step S102 may include step S1021 .

[0078] Step S1021: When the timing time of the timer does not reach the timing limit, in response to the callback message corresponding to the emergency call, notify the wireless communication module to send an MSD to the PSAP.

[0079] If the timer does not reach the timing time, it indicates that the wireless communication module of the vehicle-mounted TBOX is still in the waiting call back stage. At this time, the wireless communication module can automatically connect the call back. After the wireless communication module can automatically connect the call back, the host computer can notify the wireless communication module to send MSD, so that the operator of the PSAP can understand the latest situation in time.

[0080] Fig. 9 FIG. 2 shows an interactive schematic diagram of a data transmission method according to an embodiment of the present disclosure. Fig. 9 As shown, the data transmission method may include steps S201 to S220.

[0081] Step S201: The host computer sends an emergency call request to the wireless communication module.

[0082] The emergency call request includes a CSFB instruction.

[0083] In some examples, the host computer may send an emergency call request to the wireless communication module when receiving a trigger message from the emergency call control or a collision message sent by the collision detection device.

[0084] Step S202: The wireless communication module actively falls back to the 2G / 3G network.

[0085] Step S203: The wireless communication module initiates an emergency call.

[0086] Step S204: PSAP connects the emergency call.

[0087] Step S205: The wireless communication module establishes a voice communication link for the emergency call with the PSAP in the CS domain.

[0088] Step S206: The wireless communication module sends the MSD to the PSAP via the voice communication link of the emergency call.

[0089] Step S207: PSAP hangs up the emergency call.

[0090] Step S208: The wireless communication module restores the IMS network.

[0091] Step S209: Send an emergency call hang-up message to the host computer.

[0092] Among them, step S209 can be executed before, after or during the execution of step 208.

[0093] Step S210: the host computer sends a request to disable the IMS network to the wireless communication module.

[0094] Step S211, the host computer starts the timer and sets the timing time limit.

[0095] Among them, step S211 can be executed before, after or during the execution of step S211.

[0096] Step S212: The wireless communication module cancels the registration in the IMS network and restores the LTE network.

[0097] Step S213: PSAP initiates a callback for the emergency call.

[0098] Step S214, the wireless communication module CSFB to the 2G / 3G network to connect the call back.

[0099] Step S215: The wireless communication module establishes a call-back voice communication link with the PSAP in the CS domain.

[0100] Step S216: The wireless communication module sends a callback message corresponding to the emergency call to the host computer.

[0101] Step S217: When the timing time of the timer does not reach the timing limit, the host computer responds to the callback message corresponding to the emergency call and notifies the wireless communication module to send the MSD to the PSAP.

[0102] Step S218: The wireless communication module sends the MSD to the PASP via the callback voice communication link.

[0103] Step S219: When the timing time of the timer reaches the timing limit, the host computer sends a request for registering the IMS network to the wireless communication module.

[0104] Step S220: The wireless communication module registers with the IMS network.

[0105] In the embodiment of the present disclosure, when the waiting callback stage begins, the host computer of the vehicle-mounted TBOX sends a request to disable the IMS network to the wireless communication module so that the network of the wireless communication module is under the LTE network. In this way, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving the callback request, thereby transmitting the MSD in the CS domain, realizing the continuity of the eCall service. At the same time, the user is unaware of the whole process and other data services of the vehicle-mounted TBOX are not affected.

[0106] Fig.10 The structure diagram of the data transmission device provided according to the embodiment of the present disclosure is shown. The device can be applied to the host computer of the vehicle-mounted TBOX, and the vehicle-mounted TBOX also includes a wireless communication module, and the wireless communication module is registered in the IMS network. Fig.10 As shown, the device 40 includes: a first sending module 401, which is used to send a request to disable the IMS network to the wireless communication module in response to a hang-up message of the emergency call, so that the wireless communication module cancels the registration in the IMS network; a notification module 402, which is used to respond to a callback message corresponding to the emergency call sent by the first sending module 401, and notify the wireless communication module to send a minimum data set MSD to a public service answering point PSAP.

[0107] In the disclosed embodiment, when waiting for the callback stage to begin, the host computer of the vehicle-mounted TBOX sends a request to disable the IMS network to the wireless communication module so that the network of the wireless communication module is under the LTE network. In this way, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving the callback request, thereby transmitting the MSD in the CS domain, realizing the continuity of the eCall service without affecting other data services.

[0108] In one possible implementation, the device also includes: a starting module, used to start a timer and set a timing limit in response to the hang-up message of the emergency call; a second sending module, used to send a request to register the IMS network to the wireless communication module when the timing time of the timer reaches the timing limit, so that the wireless communication module is registered in the IMS network.

[0109] In a possible implementation, the notification module is further configured to: when the timing time of the timer does not reach the timing limit, in response to a callback message corresponding to the emergency call, notify the wireless communication module to send the MSD to the PSAP.

[0110] In one possible implementation, the device also includes: a third sending module, used to send an emergency call request to the wireless communication module, wherein the emergency call request includes a circuit switch fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the circuit switched CS domain, and sends the MSD to the PSAP through the voice communication link.

[0111] In a possible implementation manner, the third sending module is further used to:

[0112] When receiving a trigger message of an emergency call control or a collision message sent by a collision detection device, the emergency call request is sent to the wireless communication module.

[0113] In the disclosed embodiment, when waiting for the callback stage to begin, the host computer of the vehicle-mounted TBOX sends a request to disable the IMS network to the wireless communication module so that the network of the wireless communication module is under the LTE network. In this way, the wireless communication module can automatically CSBF to the 2G / 3G network when receiving the callback request, thereby transmitting the MSD in the CS domain, realizing the continuity of the eCall service without affecting other data services.

[0114] An embodiment of the present disclosure provides a data transmission device, comprising: a processor and a memory for storing processor-executable instructions; wherein the processor is configured to implement the above method when executing the instructions.

[0115] An embodiment of the present disclosure provides a non-volatile computer-readable storage medium having computer program instructions stored thereon, and the computer program instructions implement the above method when executed by a processor.

[0116] An embodiment of the present disclosure provides a computer program product, including a computer-readable code, or a non-volatile computer-readable storage medium carrying the computer-readable code. When the computer-readable code runs in a processor of an electronic device, the processor in the electronic device executes the above method.

[0117] Computer readable storage medium can be a tangible device that can hold and store instructions used by an instruction execution device. Computer readable storage medium includes, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (non-exhaustive list) of computer readable storage medium include: a portable computer disk, a hard disk, a random access memory (Random Access Memory, RAM), a read-only memory (Read Only Memory, ROM), an erasable programmable read-only memory (ElectricallyProgrammable Read-Only-Memory, EPROM or flash memory), a static random access memory (Static Random-Access Memory, SRAM), a portable compact disc read-only memory (Compact Disc Read-Only Memory, CD-ROM), a digital versatile disk (Digital Video Disc, DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a protruding structure in a groove on which instructions are stored, and any suitable combination thereof.

[0118] The computer-readable program instructions or codes described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0119] The computer program instructions for performing the disclosed operation may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer, partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, by utilizing the state information of computer-readable program instructions to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.

[0120] Various aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0121] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0122] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0123] The flow chart and block diagram in the accompanying drawings show the possible architecture, function and operation of the device, system, method and computer program product according to multiple embodiments of the present disclosure. In this regard, each square frame in the flow chart or block diagram can represent a part of a module, program segment or instruction, and a part of the module, program segment or instruction includes one or more executable instructions for realizing the logical function of the specification. In some alternative implementations, the functions marked in the square frame can also occur in a sequence different from that marked in the accompanying drawings. For example, two continuous square frames can actually be executed substantially in parallel, and they can also be executed in the opposite order sometimes, depending on the functions involved.

[0124] It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented by hardware (such as a circuit or ASIC (Application Specific Integrated Circuit)) that performs the corresponding function or action, or can be implemented by a combination of hardware and software, such as firmware.

[0125] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0126] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A data transmission method, characterized in that: The method is applied to a host computer of a vehicle-mounted remote communication box TBOX, wherein the vehicle-mounted TBOX further comprises a wireless communication module, and the wireless communication module is registered in an Internet Protocol Multimedia Subsystem IMS network. The method comprises: In response to a hang-up message of the emergency call, sending a request to disable the IMS network to the wireless communication module, so that the wireless communication module cancels the registration in the IMS network and makes the network of the wireless communication module under the LTE network; In response to the callback message corresponding to the emergency call, the wireless communication module is notified to send a minimum data set MSD to a public service answering point PSAP.

2. The method according to claim 1, characterized in that The method further comprises: In response to the hang-up message of the emergency call, starting a timer and setting a time limit; When the timing time of the timer reaches the timing limit, a request for registering the IMS network is sent to the wireless communication module, so that the wireless communication module is registered in the IMS network.

3. The method according to claim 2, characterized in that The method of notifying the wireless communication module to send the MSD to the PSAP in response to the callback message corresponding to the emergency call comprises: When the timing time of the timer does not reach the timing limit, in response to the callback message corresponding to the emergency call, the wireless communication module is notified to send the MSD to the PSAP.

4. The method according to claim 1, characterized in that: The method further comprises: An emergency call request is sent to the wireless communication module, wherein the emergency call request includes a circuit switched fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the circuit switched CS domain, and sends an MSD to the PSAP through the voice communication link.

5. The method according to claim 4, characterized in that Sending an emergency call request to the wireless communication module includes: When receiving a trigger message of an emergency call control or a collision message sent by a collision detection device, the emergency call request is sent to the wireless communication module.

6. A data transmission device, characterized in that: The device is applied to the host computer of the vehicle-mounted remote communication box TBOX, and the vehicle-mounted TBOX also includes a wireless communication module, and the wireless communication module is registered in the Internet Protocol Multimedia Subsystem IMS network. The device includes: A first sending module, configured to send a request to disable the IMS network to the wireless communication module in response to a hang-up message of the emergency call, so that the wireless communication module cancels the registration in the IMS network and places the network of the wireless communication module under the LTE network; The notification module is used to notify the wireless communication module to send a minimum data set MSD to a public service answering point PSAP in response to a callback message corresponding to the emergency call sent by the first sending module.

7. The device according to claim 6, characterized in that The device also includes: A starting module, used for starting a timer and setting a timing time limit in response to a hang-up message of the emergency call; The second sending module is used to send a request for registering the IMS network to the wireless communication module when the timing time of the timer reaches the timing limit, so that the wireless communication module registers in the IMS network.

8. The device according to claim 7, characterized in that The notification module is also used for: When the timing time of the timer does not reach the timing limit, in response to the callback message corresponding to the emergency call, the wireless communication module is notified to send the MSD to the PSAP.

9. The device according to claim 6, characterized in that The device also includes: The third sending module is used to send an emergency call request to the wireless communication module, wherein the emergency call request includes a circuit switched fallback CSFB instruction, so that the wireless communication module establishes a voice communication link with the PSAP in the circuit switched CS domain, and sends an MSD to the PSAP through the voice communication link.

10. The device according to claim 9, characterized in that The third sending module is also used for: When receiving a trigger message of an emergency call control or a collision message sent by a collision detection device, the emergency call request is sent to the wireless communication module.

11. A data transmission device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to implement the method of any one of claims 1 to 5 when executing the instructions.

12. A non-volatile computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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