KR102378380B1 - Time synchronization method and apparatus for vehicle, device and storage medium - Google Patents

Abstract

The present application discloses a vehicle time synchronization method, apparatus, device and storage medium, and relates to a vehicle Internet field. According to a specific implementation method, when it is detected that the power of the first unit on the vehicle is turned off and then rebooted, current time information of the second unit on the vehicle is obtained, and the second unit is connected with the first unit; Based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. The embodiment of the present application can ensure that the first unit performs time synchronization in a timely manner, and ensure that there is time information at boot time.

Description

Time synchronization method and apparatus for vehicle, device and storage medium

An embodiment of the present application relates to a vehicle Internet technology among Internet of Things technology, and more particularly, to a vehicle time synchronization method, apparatus, device, and storage medium.

Currently, in-vehicle hosts on vehicles mostly use a Network Time Protocol (NTP) service to update the system time. That is, time synchronization is implemented by communicating with the NTP server, acquiring the NTP time from the NTP server and updating the system time of the vehicle host. However, if the vehicle host is powered off and then rebooted, there is no network for a while at this stage, so time synchronization with the vehicle host is not possible using the NTP service. Alternatively, when the network is unstable, the acquisition time of the NTP time becomes longer, the time acquisition speed becomes slow, and the time synchronization is not performed immediately.

A vehicle time synchronization method, apparatus, apparatus and storage medium for instantaneous time synchronization with respect to the vehicle are provided.

According to a first aspect, there is provided a method for time synchronization of a vehicle. The method includes: when it is detected that the power of the first unit on the vehicle is turned off and then reboots, obtaining current time information of a second unit on the vehicle, the second unit being connected to the first unit; performing time synchronization on the system time of the first unit based on the current time information of the second unit on the vehicle to obtain a first synchronization time.

According to a second aspect, there is provided a time synchronization device for a vehicle. The device is configured to, when it is detected that the power of the first unit on the vehicle is turned off and then rebooted, obtains the current time information of the second unit on the vehicle, wherein the second unit is an acquisition module connected to the first unit ; and a time synchronization module configured to perform time synchronization on the system time of the first unit based on the current time information of the second unit on the vehicle to obtain a first synchronization time.

According to a third aspect, an electronic device is provided. The electronic device is

at least one processor; and

A memory that is communicatively coupled to the at least one processor; including,

An instruction executable by the at least one processor is stored in the memory, the instruction being executed by the at least one processor to enable the at least one processor to perform the method according to the first aspect.

According to a fourth aspect, there is provided a vehicle including the electronic device according to the third aspect.

According to a fifth aspect, there is provided a non-transitory computer readable storage medium having computer instructions stored thereon, wherein the computer instructions cause a computer to perform the method according to the first aspect.

According to a sixth aspect, a time synchronization method is provided. In the method, when the power of the first unit is turned off and then rebooted, the current time information of the second unit is obtained from the second unit, and the time for the first unit to obtain the time information from the second unit is a step smaller than the time at which the first unit acquires time information from an NTP server; and performing time synchronization on the system time of the first unit based on the current time information of the second unit on the vehicle to obtain a first synchronization time.

According to a seventh aspect, there is provided a computer program stored in a computer readable storage medium, wherein at least one processor of an electronic device can read the computer program from the readable storage medium, and the at least one processor is the computer A program is executed to cause the electronic device to perform the method according to the first aspect.

The technology according to the present application solves a problem that time synchronization cannot be performed immediately after the vehicle host is powered off and then rebooted.

It should be understood that the contents described in this section are not intended to specify key or important features of the embodiments of the present application, and are not intended to limit the scope of the present application. Other features of the present application can be easily understood from the following specification.

The accompanying drawings are provided to more fully understand the present method, and are not limited to the present application.
1 is a diagram illustrating an architecture of a time synchronization system provided in an embodiment of the present application.
2 is a flowchart of a vehicle time synchronization method provided in an embodiment of the present application.
3 is a diagram illustrating control logic inside a vehicle provided in an embodiment of the present application.
4 is a diagram illustrating control logic inside a vehicle provided by another embodiment of the present application.
5 is a diagram illustrating a connection between a vehicle and an NTP server provided in an embodiment of the present application.
6A is a diagram illustrating a connection between a vehicle and an NTP server provided in another embodiment of the present application.
6B is a diagram illustrating vehicle time synchronization signaling provided by another embodiment of the present application.
7 is a block diagram of a vehicle time synchronization device provided in an embodiment of the present application.
8 is a block diagram of an electronic device for implementing a vehicle time synchronization method according to an embodiment of the present application.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application for easy understanding, and these should be regarded as exemplary only. Accordingly, it should be understood that those skilled in the art may make various changes and modifications to the embodiments described herein without departing from the scope and spirit of the present application. Likewise, for clarity and conciseness, descriptions of well-known functions and structures are omitted from the description below.

1 is a diagram illustrating an architecture of a time synchronization system provided in an embodiment of the present application. 1 , the system includes a vehicle 11 and an NTP server 12 , and a vehicle host 13 is installed on the vehicle 11 .

An in-vehicle host is a key part of an in-vehicle audio and video system, whose main function is to reproduce audio sources. On the other hand, most hosts further include a display, that is, a screen. These hosts can form a set of audio and video systems as long as they are connected with speakers. The host of the car stereo is generally disposed on the control panel of the vehicle for the driver's touch and operation convenience. There is time information on the vehicle host, which is referred to as the system time of the vehicle host.

An NTP server is a protocol for synchronizing computer time, and by allowing the computer to synchronize to that server or clock source (eg, quartz clock, GPS, etc.), it can provide high-accuracy time correction. In the embodiment of the present application, the vehicle host 13 communicates with the NTP server 12 through a network, obtains the NTP time from the NTP server 12, and performs time synchronization with respect to the system time of the vehicle host 13 do.

In the prior art, if the vehicle host is powered off and then rebooted, etc., it is necessary to obtain the NTP time from the NTP server again after rebooting. However, since the vehicle host and the NTP server perform network communication, after the vehicle host is powered off and rebooted, the vehicle host must first establish a network connection with the NTP server to obtain the time from the NTP server. Therefore, in the process of establishing a network connection, the system time of the vehicle host at this time may still be time information before the power is turned off and then rebooted, so the system time update of the vehicle host cannot be made immediately.

With respect to the technical problem described above, an embodiment of the present application provides a method for synchronizing time of a vehicle. The method obtains time information from a second unit on the vehicle through a first unit on the vehicle, for example, after the vehicle host power is turned off and then rebooted, to perform time synchronization for the first unit. Since the first unit and the second unit are both units on the vehicle, the speed at which the first unit obtains time information from the second unit on the vehicle is faster than the speed at which the first unit obtains the NTP time from the NTP server. Therefore, after the first unit is powered off and rebooted, the first unit can quickly obtain the time information to update its own system time, so that after the first unit is powered off and rebooted, the time is synchronized to itself immediately It can be secured to perform , and ensure that there is time information at boot time.

Hereinafter, the technical solution of the present application and how the technical solution of the present application solves the above-described technical problem will be described in detail with reference to specific examples. Some specific embodiments below may be combined with each other, and overlapping descriptions of the same or similar concepts or processes in some embodiments will be omitted. Hereinafter, in combination with the accompanying drawings, an embodiment of the present application will be described.

2 is a flowchart of a vehicle time synchronization method provided in an embodiment of the present application. The embodiment of the present application provides a vehicle time synchronization method for the above technical problem according to the prior art, and as shown in FIG. 2 , the specific steps of the method are as follows.

Step 201, when it is detected that the power of the first unit on the vehicle is turned off and then reboots, current time information of the second unit on the vehicle is obtained, and the second unit is connected with the first unit.

The performing subject of this embodiment may be the first unit. The first unit is a unit using an Android operating system. The first unit may obtain the NTP time from the NTP server and perform time synchronization with respect to its own system time, for example, a vehicle host. Hereinafter, an embodiment of the present application will be described in detail by taking the vehicle host as an example. Specifically, the first unit may be a unit that updates its own system time through any NTP time on the vehicle, and is not limited to the vehicle host.

The second unit may be a unit other than the first unit on the vehicle, and the first unit and the second unit are connected to each other. The second unit is the unit with time information on the vehicle.

Optionally, it is possible to detect that the first unit is powered off and then rebooted for itself, and a module unit other than the first unit detects that the first unit is powered off and then rebooted, and the detection result is determined It may be sent to the first unit, and this embodiment is not specifically limited thereto.

If it is detected that the power is turned off and then rebooted by the first unit, or a detection result of the first unit being powered off and then rebooted is received, after rebooting is completed, the second unit is turned off from the second unit. Get the current system time.

Step 202, based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time.

The first unit performs time synchronization on its own system time based on the current system time of the second unit to obtain the first synchronization time.

An embodiment of the present application is configured to obtain current time information of a second unit on the vehicle when it is detected that the power of the first unit on the vehicle is turned off and then rebooted; Based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. Here, the second unit is connected to the first unit, and since the first unit and the second unit are both units on the vehicle, the speed at which the first unit acquires time information from the second unit on the vehicle is: It is faster than the speed of obtaining NTP time from this NTP server. Therefore, after the first unit is powered off and rebooted, the first unit can quickly obtain the time information to update its own system time, so that after the first unit is powered off and rebooted, the time is synchronized to itself immediately Secure to perform and ensure that there is time information at boot time

Here, the acquisition time consumed by the first unit to acquire the time information from the second unit is smaller than the acquisition time consumed by the first unit to acquire the time information from the NTP server. For example, if the acquisition time consumed by the first unit to acquire time information from the second unit is T1, and the acquisition time consumed by the first unit to acquire time information from the NTP server is T2, then T1 < T2 .

In one alternative embodiment, the second unit may be an Electronic Control Unit (ECU). At this time, based on the current time information of the second unit on the vehicle, performing time synchronization on the system time of the first unit to obtain the first synchronization time includes: obtaining the ECU time from the electronic control unit (ECU) to do; and performing time synchronization on the system time of the first unit based on the ECU time to obtain a first synchronization time.

As shown in FIG. 3 , for example, when the first unit is a vehicle host, the vehicle host 31 and the electronic control unit 32 are connected through a CAN bus, and if the vehicle host 31 When it is detected that the power has been turned off and rebooted, after the reboot is completed, communicate with the electronic control unit on the CAN bus to obtain its current system time, that is, the ECU time, from the electronic control unit (ECU), and based on the ECU time By synchronizing to its own system time, a first synchronization time is obtained. This implements time synchronization after the vehicle host power is turned off and then rebooted. Since the vehicle host and the electronic control unit communicate via CAN bus, it quickly obtains the ECU time from the ECU and updates its own system time based on the ECU time, thus ensuring that the vehicle host instantly time synchronizes, and at boot time. Ensure that time information is available on

In another optional embodiment, the second unit may be a Global Positioning System (GPS) unit. At this time, based on the current time information of the second unit on the vehicle, performing time synchronization with the system time of the first unit to obtain the first synchronization time includes: acquiring time; and performing time synchronization on the system time of the first unit based on the GPS time to obtain a first synchronization time.

As shown in FIG. 4 , for example, when the first unit is a vehicle host, the vehicle host 41 and the GPS unit 42 are connected through a CAN bus. When it is detected that the system has been turned off and rebooted, after the reboot is completed, communication is performed with the GPS unit 42 to obtain the current system time, that is, the GPS time, from the GPS unit 42, and based on the GPS time A first synchronization time is obtained by synchronizing with the system time of . This implements time synchronization after the vehicle host power is turned off and then rebooted. Since both the in-vehicle host and GPS unit are module units on the vehicle, by quickly obtaining the GPS time from the GPS unit and updating their system time based on the GPS time, the time synchronization to the in-vehicle host is instantaneous, and at boot time Ensure time information is available. On the other hand, GPS time accuracy is higher, and time synchronization with the vehicle host can be completed quickly and accurately at once.

On the basis of the above-described embodiment of updating the system time of the vehicle host through the ECU time, the ECU time can be secured so that there is time information at the time of booting the vehicle host because the acquisition speed is fast, but the ECU time is not accurate. Since it is often the case, after securing time information during booting, time synchronization may be performed again with respect to the first synchronization time based on other time information with higher accuracy.

As shown in FIG. 5 , the vehicle host 51 is connected to the NTP server 53 in addition to being connected to the electronic control unit 52 . After the vehicle host is powered on and rebooted, it still acquires the NTP time from the NTP server. Therefore, in an optional embodiment, after obtaining the first synchronization time, obtain the NTP time from the NTP server; By updating the first synchronization time based on the NTP time, a second synchronization time may be further obtained. The second synchronization time is a more accurate time, and is the final system time of the vehicle host.

On the basis of FIG. 3 , as shown in FIG. 6A , the vehicle host 61 is connected to the GPS unit 63 in addition to being connected to the electronic control unit 62 . The vehicle host, after time synchronization through the ECU time, also obtains the GPS time from the GPS unit; The second synchronization time may be obtained by updating the first synchronization time based on the GPS time. Since the accuracy of the GPS time is higher than that of the ECU, the second synchronization time updated based on the GPS may be used as the final system time of the vehicle host.

Continuing to refer to FIG. 6A, if the vehicle host obtains the NTP time from the NTP server 64, and additionally updates the second synchronization time updated based on GPS, the final system time of the vehicle host can be obtained Alternatively, by comparing the NTP time and the second synchronization time updated based on the GPS, if the two are the same, the step of updating the updated second synchronization time based on the GPS based on the NTP time may not be performed. If the two are not the same, the accuracy of the system time of the vehicle host may be improved by additionally updating the updated second synchronization time based on the GPS based on the NTP time.

In the above-described embodiment, it has been described that the ECU time accuracy is lower and the GPS time and NTP time accuracy are higher. Therefore, the vehicle host acquires the NTP time from the NTP server, and also sends the NTP time to the ECU so that the ECU performs time synchronization with the ECU's own system time based on the NTP time, so that the ECU's own time information accuracy can be ensured.

Similarly, after acquiring the GPS time from the GPS unit, the vehicle host also sends the GPS time to the ECU, so that the ECU performs time synchronization with the ECU's own system time based on the GPS time, so that the ECU's own time information accuracy can be ensured.

Hereinafter, an implementation process according to an embodiment of the present application will be described in detail through an example.

As shown in FIG. 6B , the corresponding time synchronization method includes the following steps.

S601, when the vehicle host power is turned off and then rebooted, the vehicle host sends an ECU time acquisition request to the ECU.

S602, ECU returns ECU time.

S603, the vehicle host updates the system time based on the ECU time.

Alternatively, in S604, when the vehicle host power is turned off and then rebooted, the vehicle host sends a GPS time acquisition request to the GPS.

S605, GPS returns GPS time.

S606, the vehicle host updates the system time based on the GPS time.

S607, when the vehicle host completes the reboot and connects to the network, it sends an NTP time acquisition request to the NTP server.

S608, NTP server returns NTP time.

S609, obtain the NTP time from the NTP server and update the system time.

For the detailed implementation process of step S601 - step S609, reference may be made to the description of the above-described embodiment, and overlapping description will be omitted here.

In some scenarios, users may have their own time setting habits. For example, the user habitually sets the system time of the vehicle host to be earlier or slower than the standard time by a certain amount of time. Accordingly, in some embodiments, based on the current time information of the second unit on the vehicle, in the process of performing time synchronization for the system time of the first unit, time setting information for setting the system time is further obtained can; determine a time difference value between the time setting information and the standard system time; determine a first preliminary adjustment time based on the time difference value and the current time information obtained from the second unit; Time synchronization is performed on the system time of the first unit based on the first preliminary adjustment time to obtain a first synchronization time.

Here, the time setting information includes time setting information earlier than the standard system time by a predetermined time and/or time setting information slower than the standard system time by a predetermined time.

Exemplarily, in the first time synchronization process, that is, in the process of updating its own system time based on the acquired ECU time or GPS time, the vehicle host increases the time difference value or decrease, to obtain the first preliminary adjustment time, and to synchronize with the time of the vehicle host based on the first preliminary adjustment time. For example, if the ECU time obtained by the vehicle host is 12:40, but the user habitually sets the time of the vehicle host to 10 minutes earlier than the standard time, the system time of the vehicle host after the final adjustment is 12:30 am. Similarly, if the user habitually sets the time of the vehicle host to be 15 minutes slower than the standard time, the system time of the vehicle host after the final adjustment is 12:55.

obtain a difference value between time setting information set for the system time and the standard system time; Based on the time difference value and the current time information of the other modules, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. In this way, it can be made to better conform to the user's time setting habit, and the user does not need to manually re-adjust the first synchronization time according to his or her time setting habit, so the user experience is better.

Optionally, in the second time synchronization process, the same operation may be performed for the vehicle host according to the user set habit. That is, the vehicle host increases or decreases the time difference value on the basis of the acquired NTP time in the process of updating the first synchronization time based on the acquired NTP time to obtain a second preliminary adjustment time, 2 Can be synchronized to the time of the vehicle host based on the preliminary adjustment time. A specific implementation process includes: acquiring time setting information set for the system time; determining a time difference value between the time setting information and the standard system time; determining a second preliminary adjustment time based on the time difference value and the current time information obtained from the NTP server; and performing time synchronization on the system time of the first unit based on the second preliminary adjustment time to obtain a second synchronization time.

Optionally, in the second time synchronization process, the same operation may be performed on the vehicle host according to a user set habit. That is, in the process of updating the vehicle host for the first synchronization time based on the acquired GPS time, on the basis of the acquired GPS time, the time difference value is increased or decreased to obtain a third preliminary adjustment time, It may be synchronized with the time of the vehicle host based on the third preliminary adjustment time. A specific implementation process includes: acquiring time setting information set for the system time; determining a time difference value between the time setting information and a standard system time; determine a third preliminary adjustment time based on the time difference value and the current time information obtained from the GPS unit; and performing time synchronization on the system time of the first unit based on the third preliminary adjustment time to obtain a second synchronization time.

In the second time synchronization process, for a detailed implementation process of time synchronization according to user habits, reference may be made to the detailed description of the first time synchronization process, and a detailed description thereof will be omitted here.

7 is a structural diagram of a vehicle time synchronization device provided in an embodiment of the present invention. Specifically, the time synchronization device of the vehicle may be a vehicle host according to the above-described embodiment or a member (eg, a chip or a circuit) of the vehicle host. The vehicle time synchronization apparatus provided in the embodiment of the present invention may perform the processing processor provided in the vehicle time synchronization method embodiment, and as shown in FIG. 7 , the vehicle time synchronization apparatus 70 includes: and an acquiring module 71 and a time synchronization module 72. Here, the acquiring module 71 is configured to: when it is detected that the power of the first unit on the vehicle is turned off and then rebooted, the second unit on the vehicle obtain current time information, the second unit is connected with the first unit; the time synchronization module 72 is configured to: based on the current time information of the second unit on the vehicle, for the system time of the Time synchronization is performed to obtain a first synchronization time.

Optionally, the time synchronization module 72 includes a time synchronization unit 721 for obtaining the ECU time from an electronic control unit (ECU), the second unit includes the electronic control unit; and the ECU time Based on , time synchronization is performed on the system time of the first unit to obtain a first synchronization time.

Optionally, the time synchronization module 72 includes a time synchronization unit 721 for obtaining a GPS time from a global positioning system (GPS) unit, wherein the second unit includes the GPS unit; Then, time synchronization is performed on the system time of the first unit to obtain a first synchronization time.

Optionally, the acquiring module 71 also acquires the NTP time from the NTP server; The time synchronization module 72 also updates for the first synchronization time based on the NTP time, to obtain a second synchronization time.

Optionally, the acquiring module 71 also acquires the GPS time from the GPS unit; The time synchronization module 72 also updates for the first synchronization time based on the GPS time, to obtain a second synchronization time.

Optionally, the device further includes a sending module 73 for sending the NTP time to the second unit.

Optionally, the device further comprises a sending module 73 for sending the GPS time to the second unit.

Optionally, the acquiring module 71 further acquires time setting information to set for the system time; The time synchronization module 72 also determines a time difference value between the time setting information and the standard system time; based on the time difference value and the current time information obtained from the second unit, determine a first preliminary adjustment time time synchronization is performed on the system time of the first unit based on the first preliminary adjustment time to obtain a first synchronization time.

Optionally, the acquiring module 71 also acquires time setting information to set for the system time; The time synchronization module 72 also determines a time difference value between the time setting information and the standard system time; based on the time difference value and the current time information obtained from the NTP server, determines a second preliminary adjustment time, Time synchronization is performed on the system time of the first unit based on the second preliminary adjustment time to obtain a second synchronization time.

Optionally, the acquiring module 71 also acquires the time setting information set for the system time; The time synchronization module 72 also determines a time difference value between the time setting information and the standard system time; based on the time difference value and the current time information obtained from the GPS unit, determines a third preliminary adjustment time, Time synchronization is performed on the system time of the first unit based on the third preliminary adjustment time to obtain a second synchronization time.

Optionally, the time setting information includes time setting information earlier than the standard system time by a predetermined time, and/or time setting information slower than the standard system time by a predetermined time.

Optionally, the first unit is a vehicle host.

The apparatus for synchronizing time of a vehicle of the embodiment shown in FIG. 7 can implement the technical solution of the above-described method embodiment, and the implementation principle and technical effect are the same, and thus a detailed description thereof is omitted here.

An embodiment of the present application is configured to obtain current time information of a second unit on the vehicle when it is detected that the power of the first unit on the vehicle is turned off and then rebooted; Based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. Here, the second unit is connected to the first unit, and since the first unit and the second unit are both units on the vehicle, the speed at which the first unit acquires time information from the second unit on the vehicle is: It is faster than the speed of obtaining NTP time from this NTP server. Therefore, after the first unit is powered off and rebooted, the first unit can quickly obtain the time information to update its own system time, so that after the first unit is powered off and rebooted, the time is synchronized to itself immediately , and ensure that there is time information at boot time.

According to an embodiment of the present application, the present application provides a time synchronization method. The time synchronization method is not limited to vehicle time synchronization, and may be used for time synchronization of other carriers or devices, and when the power of the first unit is turned off and then rebooted, the current time of the second unit from the second unit obtain information, wherein the time at which the first unit obtains time information from the second unit is less than the time at which the first unit obtains time information from the NTP server; Based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. Since the time at which the first unit obtains time information from the second unit is smaller than the time at which the first unit obtains time information from the NTP server, the time immediately after the first unit is powered off and rebooted It can be secured to perform synchronization, and time information is ensured at boot time.

According to an embodiment of the present application, the present application further provides a computer program stored in a computer readable storage medium, wherein at least one processor of the electronic device can read computer instructions from the readable storage medium, and at least one processor executes a computer program to cause the electronic device to perform the method according to any of the above-described embodiments.

According to an embodiment of the present application, the present application further provides an electronic device and a readable storage medium.

8 is a block diagram of an electronic device for a vehicle time synchronization method according to an embodiment of the present application. Electronic device refers to various types of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, large computers, and other suitable computers. Electronic devices may refer to various types of mobile devices, for example, personal portable terminals, cell phones, smart phones, wearable devices, and other similar computing devices. The elements disclosed herein, their connections and relationships, and their functions, are illustrative only and are not intended to limit what is disclosed herein and/or the required implementation of the present application.

As shown in FIG. 8 , the electronic device includes one or a plurality of processors 801 , a memory 802 , and an interface including a high-speed interface and a low-speed interface for connecting each member. Each member is connected to each other via a different bus, and may be mounted on a common motherboard or in other ways depending on demand. The processor may process commands executed within the electronic device, and may receive commands stored in or on the memory to display graphical information of the GUI on an external input/output device (eg, a display device coupled to the interface). may include In other embodiments, multiple processors and/or multiple buses and multiple memories may be used concurrently, depending on demand. Likewise, a plurality of electronic devices may be connected, with each device providing a partially required operation (eg, as a server array, a set of blade servers, or a multi-processor system). 8 takes one processor 801 as an example.

The memory 802 is a non-transitory computer-readable storage medium according to the present application. Here, the memory stores instructions executable by at least one processor, so that the at least one processor performs the vehicle time synchronization method according to the present application. The non-transitory computer-readable storage medium of the present application stores computer instructions, and the computer instructions cause the computer to perform the vehicle time synchronization method according to the present application.

The memory 802 is a non-transitory computer-readable storage medium, and a non-transitory software program, a non-transitory computer executable program and module, for example, a program instruction/module (eg, a program instruction/module corresponding to the vehicle time synchronization method according to an embodiment of the present application) For example, the acquisition module 71 and the time synchronization module 72 shown in FIG. 7 may be stored. The processor 801 executes non-transitory software programs, instructions and modules stored in the memory 802 to perform various functional applications and data processing of the server. That is, the vehicle time synchronization method among the above-described method embodiments is implemented.

The memory 802 may include a program storage area and a data storage area. Here, the program storage area may store an operating system and an application program required for at least one function. The data storage area may store data configured according to the use of an electronic device performing time synchronization of the vehicle. Meanwhile, the memory 802 may include a high-speed random access memory, and may include, for example, a non-transitory memory such as at least one magnetic storage device, a flash memory, or other non-transitory solid state storage device. In some embodiments, memory 802 may optionally include memory installed remotely to processor 801 . Such a remote memory may be connected to an electronic device that performs time synchronization of the vehicle through a network. Examples of the above-described networks include, but are not limited to, the Internet, intranets, local area networks, mobile networks, and combinations thereof.

The electronic device for the vehicle time synchronization method may further include an input device 803 and an output device 804 . The processor 801 , the memory 802 , the input device 803 , and the output device 804 may be connected by a bus or other method, and FIG. 8 exemplifies the connection via a bus.

The input device 803 may receive input number or character code information, and may generate a key signal input for user setting and function control of an electronic device for performing a vehicle time synchronization method. For example, there is an input device such as a touch screen, a keypad, a mouse, a trackpad, a touch panel, an indicator lever, one or more mouse buttons, a track ball, and a control lever. The output device 804 may include a display device, an auxiliary lighting device (eg, LED), and a tactile feedback device (eg, a vibration motor). The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, a plasma display, and the like. In some embodiments, the display device may be a touch screen.

The various embodiments of the systems and techniques described herein may be implemented in digital electronic circuit systems, integrated circuit systems, dedicated ASICs (dedicated integrated circuits), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include implemented in one or a plurality of computer programs, which may be executed and/or interpreted on a programmable system including at least one programmable processor, wherein the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor. The processor may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the like. , and the corresponding at least one output device.

Such computer programs (also referred to as programs, software, software applications, or code) contain the mechanical instructions of a programmable processor and execute such computer programs using high-level process and/or object-oriented programming languages, and/or assembly/mechanical languages. can run For example, as used herein, the terms “machine-readable medium” and “computer-readable medium” refer to any computer program product, apparatus, and/or apparatus (eg, magnetic disk, optical disk, memory, programmable logic device (PLD)) and includes a machine-readable medium for receiving mechanical instructions, which are machine-readable signals. The term “machine-readable signal” refers to any signal for providing mechanical instructions and/or data to a programmable processor.

To provide for interaction with a user, the systems and techniques described herein may be implemented on a computer, the computer comprising a display device (eg, a cathode ray tube (CRT) or LCD (eg, a cathode ray tube) liquid crystal display) monitor); and a keyboard and a pointing device (eg, a mouse or a trackball), wherein a user can provide input to the computer through the keyboard and the pointing device. Other types of devices may provide for interaction with the user. For example, the feedback provided to the user may be any form of sensing feedback (eg, visual feedback, auditory feedback, or tactile feedback); An input from the user may be received through any form (sound input, voice input, or tactile input).

The systems and techniques described herein include a computing system that includes a background member (eg, as a data server), or a computing system that includes an intermediate member (eg, an application server), or a computing system that includes a front end member. a system (eg, a user computer having a graphical user interface or Internet browser, through which a user may interact with embodiments of the systems and technologies described herein), or such a background It may be implemented in any combination of computing systems including members, intermediate members, or front end members. Any form or medium of digital data communication (eg, a communication network) may connect the members of the system to one another. Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

A computer system may include a client and a server. A client and server are typically remote from each other and typically interact through a communications network. Creates a client-server relationship through a computer program running on the corresponding computer and having a client-server relationship to each other.

According to the technical solution of the present application, when it is detected that the power of the first unit on the vehicle is turned off and then rebooted, current time information of the second unit on the vehicle is acquired; Based on the current time information of the second unit on the vehicle, time synchronization is performed on the system time of the first unit to obtain a first synchronization time. Here, the second unit is connected to the first unit, and since the first unit and the second unit are both units on the vehicle, the speed at which the first unit acquires time information from the second unit on the vehicle is It is faster than the speed of obtaining NTP time from this NTP server. Therefore, after the first unit is powered off and rebooted, the first unit quickly acquires time information and updates its own system time, so that after the first unit powers off and reboots, the first unit immediately synchronizes the time with itself. It can be secured to perform, and it is ensured that there is time information at boot time.

Steps can be rearranged, added, or deleted using the various types of processes described above. For example, each step described in the present application may be performed in parallel, sequentially, or in a different order, and as long as the technical solution disclosed in the present application can achieve the desired result, the text provides for this do not limit

The specific embodiments described above are not limited to the protection scope of the present application. Those of ordinary skill in the art will understand that various modifications, combinations, sub-combinations and substitutions can be made based on design requirements and other factors. All modifications, equivalent substitutions and improvements made within the spirit and principle of the present application shall be deemed to fall within the protection scope of the present application.

Claims (21)

acquiring current time information of a second unit on the vehicle when it is detected that the power of the first unit on the vehicle is turned off and then rebooting, the second unit being connected to the first unit;
based on the current time information of the second unit on the vehicle, performing time synchronization on the system time of the first unit to obtain a first synchronization time; . According to claim 1,
Based on the current time information of the second unit on the vehicle, performing time synchronization on the system time of the first unit to obtain a first synchronization time,
obtaining ECU time from an electronic control unit (ECU), wherein the second unit includes the electronic control unit;
based on the ECU time, performing time synchronization on the system time of the first unit to obtain a first synchronization time. According to claim 1,
Based on the current time information of the second unit on the vehicle, performing time synchronization on the system time of the first unit to obtain a first synchronization time,
obtaining a GPS time from a global positioning system (GPS) unit, the second unit comprising the GPS unit;
Based on the GPS time, performing time synchronization with the system time of the first unit to obtain a first synchronization time. The method of claim 1 or 2, wherein the method comprises:
obtaining an NTP time from an NTP server;
The method of claim 1, further comprising: updating the first synchronization time based on the NTP time to obtain a second synchronization time. The method of claim 1 or 2, wherein the method comprises:
obtaining a GPS time from a GPS unit;
The method of claim 1, further comprising: updating the first synchronization time based on the GPS time to obtain a second synchronization time. 5. The method of claim 4, wherein the method comprises:
and sending the NTP time to the second unit. 6. The method of claim 5,
and sending the GPS time to the second unit. The method according to any one of claims 1 to 3, wherein the method comprises:
obtaining time setting information to set for the system time;
determining a time difference value between the time setting information and a standard system time;
determining a first preliminary adjustment time based on the time difference value and current time information obtained from the second unit;
Performing time synchronization on the system time of the first unit based on the first preliminary adjustment time to obtain a first synchronization time. 5. The method of claim 4, wherein the method comprises:
obtaining time setting information to set for the system time;
determining a time difference value between the time setting information and a standard system time;
determining a second preliminary adjustment time based on the time difference value and the current time information obtained from the NTP server;
The method further comprising: performing time synchronization on the system time of the first unit based on the second preliminary adjustment time to obtain a second synchronization time. The method of claim 5, wherein the method comprises:
obtaining time setting information for setting the system time;
determining a time difference value between the time setting information and a standard system time;
determining a third preliminary adjustment time based on the time difference value and the current time information obtained from the GPS unit;
The method further comprising: performing time synchronization on the system time of the first unit based on the third preliminary adjustment time to obtain a second synchronization time. 9. The method of claim 8,
The time setting information includes at least one of time setting information earlier than the standard system time by a predetermined time and time setting information slower than the standard system time by a predetermined time. 4. The method according to any one of claims 1 to 3,
The method of claim 1, wherein the first unit is a vehicle host. when it is detected that the power of the first unit on the vehicle is turned off and then reboots, obtains current time information of the second unit on the vehicle, the second unit comprising: an obtaining module connected to the first unit;
and a time synchronization module configured to perform time synchronization on the system time of the first unit based on current time information of the second unit on the vehicle to obtain a first synchronization time. at least one processor; and
A memory that is communicatively coupled to the at least one processor; including,
An instruction executable by the at least one processor is stored in the memory, and the instruction is executed by the at least one processor so that the at least one processor causes the at least one processor according to any one of claims 1 to 3 An electronic device, characterized in that it enables the method to be performed. A vehicle comprising the electronic device according to claim 14 . 16. The method of claim 15,
A vehicle host and an electronic control unit are further installed on the vehicle, and the vehicle host and the electronic control unit are connected through a CAN bus. 17. The method of claim 16,
The electronic control unit is a vehicle, characterized in that connected to the NTP server. 16. The method of claim 15,
A vehicle, characterized in that the GPS unit is further installed on the vehicle. A non-transitory computer readable storage medium storing computer instructions, wherein the computer instructions cause a computer to perform the method according to any one of claims 1 to 3. When the power of the first unit is turned off and then rebooted, the current time information of the second unit is obtained from the second unit, and the time at which the first unit obtains the time information from the second unit is determined by the first unit A step smaller than the time to obtain time information from the NTP server;
based on the current time information of the second unit, performing time synchronization on the system time of the first unit to obtain a first synchronization time; In a computer program stored in a computer-readable storage medium,
A computer program, characterized in that it implements the method according to any one of claims 1 to 3 when the computer program is executed by a processor.

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