CN117527123A - Time synchronization method, device, vehicle and storage medium - Google Patents
Time synchronization method, device, vehicle and storage medium Download PDFInfo
- Publication number
- CN117527123A CN117527123A CN202311677065.5A CN202311677065A CN117527123A CN 117527123 A CN117527123 A CN 117527123A CN 202311677065 A CN202311677065 A CN 202311677065A CN 117527123 A CN117527123 A CN 117527123A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- duration
- time
- terminal equipment
- clock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 96
- 230000004044 response Effects 0.000 claims abstract description 76
- 230000003993 interaction Effects 0.000 claims abstract description 59
- 230000009471 action Effects 0.000 claims description 13
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 230000011664 signaling Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
- H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The disclosure relates to a time synchronization method, a device, a vehicle and a storage medium in the technical field of vehicle interaction, wherein the time synchronization method comprises the following steps: calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle; acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application; determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration; and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time. The accuracy of time synchronization of the vehicle-mounted application and the terminal equipment is improved, so that the interaction stability is improved.
Description
Technical Field
The disclosure relates to the technical field of vehicle interaction, and in particular relates to a time synchronization method, a time synchronization device, a vehicle and a storage medium.
Background
The vehicle time synchronization is that a time service main body receives clocks of all time sources, for a vehicle end and a mobile phone end used for controlling a vehicle, the vehicle end receives the mobile phone end clock carried in a signaling of the mobile phone end, and vehicle-mounted application of the vehicle is synchronously aligned to the mobile phone end clock, and as the clock sources of the vehicle end and the mobile phone end are all uncertain, time synchronization can have time deviation, and the deviation magnitude cannot be determined. Thus, the clock alignment accuracy of the vehicle end and the mobile phone end is lower.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a time synchronization method, apparatus, vehicle, and storage medium.
According to a first aspect of embodiments of the present disclosure, there is provided a time synchronization method including:
calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle;
acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application;
Determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time.
Optionally, the calibrating the air interface transmission duration of the vehicle and the terminal device in response to the interaction of the terminal device and the vehicle includes:
responding to the interaction action of the terminal equipment and the vehicle, and sending a vehicle calibration request to the terminal equipment;
receiving a terminal response signal sent by the terminal equipment aiming at the vehicle calibration request, and receiving a terminal accompanying signal sent by the terminal equipment, wherein the terminal accompanying signal carries a first time when the terminal equipment receives the vehicle calibration request and a second time when the terminal response signal is sent;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the first time, the second time, the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request.
Optionally, the calibrating the air interface transmission duration of the vehicle and the terminal device according to the first time, the second time, the third time for receiving the terminal response signal, and the fourth time for sending the vehicle calibration request includes:
Determining interaction duration according to the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request;
determining a response time length according to the second time and the first time;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the difference value of the interaction duration and the response duration.
Optionally, the calibrating the air interface transmission duration of the vehicle and the terminal device in response to the interaction of the terminal device and the vehicle includes:
responding to the interaction action of the terminal equipment and the vehicle, and receiving a terminal calibration request sent by the terminal equipment;
aiming at the terminal calibration request, a vehicle response signal is sent to the terminal equipment;
generating a vehicle accompanying signal according to the fifth time for transmitting the vehicle response signal and the sixth time for receiving the terminal calibration request;
transmitting the vehicle accompanying signal to the terminal equipment, so that the terminal equipment determines the air interface transmission duration of the vehicle and the terminal equipment according to the fifth time, the sixth time, the seventh time for receiving the vehicle response signal and the eighth time for transmitting the terminal calibration request;
And calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the received air interface transmission duration sent by the terminal equipment.
Optionally, the packet duration is determined by:
acquiring system time from a system interface, and determining a first duration of a protocol data packet of an application for packaging the system time to a mobile terminal;
determining a second duration of transmitting the protocol data packet from an air interface of the mobile terminal;
and determining the packet duration according to the system time, the first duration and the second duration.
Optionally, the parsing time period is determined by:
determining a third duration from receiving the protocol data packet from an air interface of the vehicle to reporting the protocol data packet to a protocol layer;
determining a fourth duration for the protocol layer to analyze and report the protocol data packet to the vehicle-mounted application;
and determining the analysis duration according to the third duration and the fourth duration.
Optionally, the time synchronizing the clock of the vehicle with the clock of the terminal device according to the clock difference includes:
adding corresponding clock source identifiers to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, the network identifier and the time zone clock;
Broadcasting each clock added with the clock source identification to each domain controller of the vehicle, so that each domain controller obtains the clock of the corresponding clock source in a subscription mode, and time synchronizing the clocks of the domain controllers according to the obtained clock of the clock source.
According to a second aspect of embodiments of the present disclosure, there is provided a time synchronization apparatus, including:
the calibration module is configured to respond to the interaction action of the terminal equipment and the vehicle and calibrate the air interface transmission duration of the vehicle and the terminal equipment;
the acquisition module is configured to acquire the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of the system time to the transmission of the protocol data packet from the air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis reporting to the vehicle-mounted application;
the determining module is configured to determine a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and the synchronization module is configured to time synchronize the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment according to the clock difference.
Optionally, the calibration module is configured to:
responding to the interaction action of the terminal equipment and the vehicle, and sending a vehicle calibration request to the terminal equipment;
receiving a terminal response signal sent by the terminal equipment aiming at the vehicle calibration request, and receiving a terminal accompanying signal sent by the terminal equipment, wherein the terminal accompanying signal carries a first time when the terminal equipment receives the vehicle calibration request and a second time when the terminal response signal is sent;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the first time, the second time, the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request.
Optionally, the calibration module is configured to:
determining interaction duration according to the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request;
determining a response time length according to the second time and the first time;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the difference value of the interaction duration and the response duration.
Optionally, the calibration module is configured to:
Responding to the interaction action of the terminal equipment and the vehicle, and receiving a terminal calibration request sent by the terminal equipment;
aiming at the terminal calibration request, a vehicle response signal is sent to the terminal equipment;
generating a vehicle accompanying signal according to the fifth time for transmitting the vehicle response signal and the sixth time for receiving the terminal calibration request;
transmitting the vehicle accompanying signal to the terminal equipment, so that the terminal equipment determines the air interface transmission duration of the vehicle and the terminal equipment according to the fifth time, the sixth time, the seventh time for receiving the vehicle response signal and the eighth time for transmitting the terminal calibration request;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the received air interface transmission duration sent by the terminal equipment.
Optionally, the packet duration is determined by:
acquiring system time from a system interface, and determining a first duration of a protocol data packet of an application for packaging the system time to a mobile terminal;
determining a second duration of transmitting the protocol data packet from an air interface of the mobile terminal;
and determining the packet duration according to the system time, the first duration and the second duration.
Optionally, the parsing time period is determined by:
determining a third duration from receiving the protocol data packet from an air interface of the vehicle to reporting the protocol data packet to a protocol layer;
determining a fourth duration for the protocol layer to analyze and report the protocol data packet to the vehicle-mounted application;
and determining the analysis duration according to the third duration and the fourth duration.
Optionally, the synchronization module is configured to:
adding corresponding clock source identifiers to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, the network identifier and the time zone clock;
broadcasting each clock added with the clock source identification to each domain controller of the vehicle, so that each domain controller obtains the clock of the corresponding clock source in a subscription mode, and time synchronizing the clocks of the domain controllers according to the obtained clock of the clock source.
According to a third aspect of embodiments of the present disclosure, there is provided a vehicle comprising:
a first processor;
a first memory for storing first processor-executable instructions;
wherein the first processor is configured to:
calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle;
Acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application;
determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a second processor, implement the steps of the time synchronization method of any of the first aspects.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
and calibrating the air interface transmission time length of the vehicle and the terminal equipment in response to the interaction action of the terminal equipment and the vehicle, acquiring the packet time length of the terminal equipment and the analysis time length of the vehicle, determining the clock difference between the vehicle and the terminal equipment according to the analysis time length, the air interface transmission time length and the packet time length, and synchronizing the time of the clock of the vehicle-mounted application on the vehicle with the time of the clock of the terminal equipment according to the clock difference. The clock difference between the vehicle-mounted application of the vehicle and the terminal equipment can be obtained, and the time stamp calibration of the interactive signaling is completed by using the clock difference, so that the clock of the vehicle-mounted application is maintained on the same reference line as the terminal equipment, and the functional failure caused by time deviation can be avoided. The accuracy of time synchronization of the vehicle-mounted application and the terminal equipment is improved, so that the interaction stability is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flow chart illustrating a method of time synchronization according to an exemplary embodiment.
Fig. 2 is a schematic diagram of a time synchronization system, according to an example embodiment.
Fig. 3 is a flow chart illustrating one implementation of step S11 in fig. 1 according to an exemplary embodiment.
Fig. 4 is a schematic diagram illustrating a vehicle multi-clock source broadcast, according to an example embodiment.
Fig. 5 is a block diagram illustrating a time synchronization apparatus according to an exemplary embodiment.
FIG. 6 is a functional block diagram of a vehicle shown in an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
It should be noted that, all actions for acquiring signals, information or data in the present application are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
Before introducing a vehicle time synchronization method, a device, a vehicle and a storage medium provided by the disclosure, technical means and technical defects in related scenes are described, clocks of time sources with highest priority are selected to time all time-service subjects in the vehicle, and different time sources on the vehicle can be determined in priority according to accuracy attributes of the time sources. For example, GNSS (Global Navigation Satellite System ) provides the highest time accuracy of atomic clocks, so GNSS has a first priority; secondly, the precision of the NTP (Network Time Protocol ) clock is lower than that of the GNSS, and the priority of the NTP is the second priority; again, the accuracy of the NITZ (Network Identity and Time Zone, network identification and time zone) and TSP (Telematics Service Provider, automotive remote service provider) clocks is lower than that of NTP, and the priorities of the NITZ and TSP clocks are the third and fourth priorities, respectively.
However, for the mobile phone end used by the vehicle end and the vehicle control, in the scene that the clocks of the vehicle end and the vehicle control need to be completely aligned, because the clock source of the vehicle end may be NTP or GNSS, there is uncertainty, the clock source of the mobile phone end may be NITZ, GNSS or NTP, and there is uncertainty, so in the case that the clock sources of the vehicle end and the mobile phone end are uncertain, there may be a time deviation, and the deviation magnitude cannot be determined. Resulting in lower accuracy of clock alignment at the vehicle end and the cell phone end.
In view of this, the present disclosure provides a vehicle time synchronization method, which aims to maintain a clock of an on-vehicle application on the same reference line as a terminal device, and avoid a functional failure caused by a time deviation. The accuracy of time synchronization of the vehicle-mounted application and the terminal equipment is improved, so that the interaction stability is improved.
Fig. 1 is a flowchart illustrating a time synchronization method according to an exemplary embodiment, which may be applied to a vehicle as shown in fig. 1, the time synchronization method including the following steps.
In step S11, in response to the interaction between the terminal device and the vehicle, the air interface transmission duration between the vehicle and the terminal device is calibrated.
In the embodiment of the disclosure, the terminal device may be a mobile device such as a mobile phone, a wearable device, a tablet computer, and the like. Referring to the system shown in fig. 2, the vehicle-mounted application of the vehicle may be configured with an application clock, or may acquire the clock from any clock source of the vehicle, and the terminal application may acquire the system time from the terminal clock of the terminal device, so as to calibrate the air interface transmission duration of the vehicle and the terminal device according to the clock of the vehicle-mounted application of the vehicle and the system time of the terminal device.
The interaction between the terminal device and the vehicle can be the interaction between any terminal device and the vehicle for establishing a wireless connection request for the first time.
The time length of the air-to-mouth transmission can be understood as the time length from the time when the vehicle sends the interaction information or the command from the terminal device to the time when the vehicle receives the interaction information or the command when the vehicle sends the interaction information with the terminal device in a wireless mode.
In step S12, a packet duration of the terminal device and an analysis duration of the vehicle are obtained.
The package duration is a duration from the acquisition of system time to the transmission of a protocol data packet from an air interface by the terminal equipment, and the analysis duration is a duration from the reception of the protocol data packet from the air interface to the analysis of reporting to the vehicle-mounted application by the vehicle.
In the embodiment of the disclosure, the packet duration may be sent to the vehicle by the terminal device, and the analysis duration is obtained by the vehicle by self-calculation according to the analysis report received from the air interface to the vehicle-mounted application.
In step S13, a clock difference between the vehicle and the terminal device is determined according to the parsing duration, the air interface transmission duration, and the packet duration.
In the embodiment of the disclosure, the clock difference between the vehicle and the terminal device is determined according to the sum of the analysis duration, the air interface transmission duration and the packet duration. The analysis duration and the packet duration are stable and can be measured, and the air interface transmission duration may have errors due to the influence of signal strength and distance.
In some embodiments of the present disclosure, the clock difference between the vehicle and the terminal device may be determined by the following formula: Δt=ts1+ts2+ts3. Wherein Δt is the clock difference between the vehicle and the terminal device, ts1 is the packet duration of the terminal device, ts2 is the analysis duration of the vehicle, and ts3 is the air interface transmission duration of the vehicle and the terminal device.
It can be understood that after determining the clock difference between the vehicle and the terminal device, the clock difference may be associated according to the identification information of the terminal device, and when the vehicle interacts with the terminal device each time, the time between the vehicle-mounted application and the terminal device may be synchronized according to the identification information and the clock difference.
In step S14, according to the clock difference, the clock of the vehicle-mounted application on the vehicle and the clock of the terminal device are time-synchronized.
In the embodiment of the disclosure, the vehicle end application of the vehicle performs time synchronization according to the system time carried by the instruction or the information and the clock difference under the condition that the instruction or the information of the terminal device is received each time, for example, the time of the vehicle-mounted application is synchronized by adding the clock difference on the basis of the system time carried by the instruction or the information. Or in the case that the instruction or the information does not carry the system time of the terminal device, performing time synchronization according to the time when the instruction or the information is received and the clock error. For example, subtracting the clock difference synchronizes the time of the in-vehicle application based on the time at which the instruction or information was received. The relative time deviation value of the vehicle and the terminal equipment can be obtained, and the time stamp calibration of the interactive signaling is completed by using the relative time deviation value, so that clocks of the vehicle and the terminal equipment are maintained on the same reference line, and the functional failure caused by the time deviation is avoided.
According to the technical scheme, the interactive action of the terminal equipment and the vehicle is responded, the air interface transmission time length of the vehicle and the terminal equipment is calibrated, the packet time length of the terminal equipment and the analysis time length of the vehicle are obtained, the clock difference between the vehicle and the terminal equipment is determined according to the analysis time length, the air interface transmission time length and the packet time length, and the clock of the vehicle-mounted application on the vehicle and the clock of the terminal equipment are time-synchronized according to the clock difference. The clock difference between the vehicle-mounted application of the vehicle and the terminal equipment can be obtained, and the time stamp calibration of the interactive signaling is completed by using the clock difference, so that the clock of the vehicle-mounted application is maintained on the same reference line as the terminal equipment, and the functional failure caused by time deviation can be avoided. The accuracy of time synchronization of the vehicle-mounted application and the terminal equipment is improved, so that the interaction stability of the vehicle and the terminal equipment is improved.
Optionally, referring to fig. 3, in step S11, the calibrating, in response to the interaction between the terminal device and the vehicle, the air interface transmission duration between the vehicle and the terminal device includes:
in step S111, a vehicle calibration request is sent to the terminal device in response to the interaction of the terminal device with the vehicle.
In the embodiment of the disclosure, the vehicle may send a calibration event to the terminal device in a wireless manner, where the calibration event may carry a vehicle calibration request, where the vehicle calibration request may carry an on-vehicle application identifier of the vehicle.
In one embodiment, the calibration event and the corresponding carried vehicle calibration request may be pre-generated and permanently stored, and when the terminal device connected to the vehicle performs the time period calibration for the air-to-mouth transmission, the same calibration event and the corresponding carried vehicle calibration request are received.
In another embodiment, the calibration event and the corresponding carried vehicle calibration request may be temporarily generated and deleted after use, avoiding the storage of the calibration event and the corresponding carried vehicle calibration request occupying vehicle memory. Therefore, when each terminal device connected with the vehicle performs the time length calibration of the air-to-mouth transmission, the received calibration event and the corresponding carried vehicle calibration request are different.
In step S112, a terminal response signal sent by the terminal device for the vehicle calibration request is received, and a terminal accompanying signal sent by the terminal device is received.
The terminal accompanying signal carries a first time when the terminal equipment receives the vehicle calibration request and a second time when the terminal equipment sends the terminal response signal.
In the embodiment of the disclosure, the terminal device may send a terminal response signal to the vehicle when receiving the vehicle calibration request sent by the vehicle, and the terminal accompanying signal carries a first time when the terminal device receives the vehicle calibration request sent by the vehicle port and a second time when the terminal device sends the terminal response signal from the air port of the terminal device.
In step S113, the air interface transmission duration of the vehicle and the terminal device is calibrated according to the first time, the second time, the third time for receiving the terminal response signal, and the fourth time for sending the vehicle calibration request.
Through the technical scheme, the vehicle can send the calibration request to the terminal equipment, and the air interface transmission duration is interactively completed, so that the air interface transmission duration can be accurately determined, and the problem that a large error exists in time synchronization between the vehicle and the terminal equipment due to inaccurate air interface transmission duration is avoided.
Optionally, in step S113, the calibrating the air interface transmission duration of the vehicle and the terminal device according to the first time, the second time, the third time for receiving the terminal response signal, and the fourth time for sending the vehicle calibration request includes:
and determining the interaction duration according to the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request.
In the embodiment of the disclosure, a difference value between a third time for receiving a terminal response signal and a fourth time for sending a vehicle calibration request is determined as an interaction time length, namely, the interaction time length is obtained by subtracting the fourth time from the third time.
And determining the response time length according to the second time and the first time.
In the embodiment of the disclosure, the difference between the second time and the first time is determined as the response time length, that is, the response time length is obtained by subtracting the first time from the second time.
And calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the difference value of the interaction duration and the response duration.
In the embodiment of the disclosure, the response time is subtracted from the interaction time to obtain the air interface transmission time of the vehicle and the terminal equipment, and then the air interface transmission time of the vehicle and the terminal equipment is obtained by calibrating according to the identification of the terminal equipment and the air interface transmission time.
Optionally, in step S11, the calibrating, in response to the interaction between the terminal device and the vehicle, the air interface transmission duration between the vehicle and the terminal device includes:
and responding to the interaction action of the terminal equipment and the vehicle, and receiving a terminal calibration request sent by the terminal equipment.
And aiming at the terminal calibration request, sending a vehicle response signal to the terminal equipment.
In the embodiment of the disclosure, when the terminal device is in wireless connection with the vehicle for the first time, a terminal calibration request can be sent to the vehicle, the vehicle can send a pre-stored vehicle response signal to the terminal device for the terminal calibration request under the condition that the terminal calibration request is received, or can generate a temporary vehicle response signal to the terminal calibration request under the condition that the terminal calibration request is received, send the temporarily generated vehicle response signal to the terminal device, and delete the temporarily generated vehicle response signal after the transmission duration of the calibration air interface.
Generating a vehicle accompanying signal according to the fifth time for transmitting the vehicle response signal and the sixth time for receiving the terminal calibration request;
and sending the vehicle accompanying signal to the terminal equipment, so that the terminal equipment determines the air interface transmission duration of the vehicle and the terminal equipment according to the fifth time, the sixth time, the seventh time for receiving the vehicle response signal and the eighth time for sending the terminal calibration request.
In the embodiment of the disclosure, after the vehicle sends the vehicle response signal, a frame of follow-up message may be generated according to the fifth time for sending the vehicle response signal and the sixth time for receiving the terminal calibration request, where the follow-up message carries the fifth time and the sixth time. And sending the follow up message to the terminal equipment. The follow up message is one form of a vehicle accompanying signal.
And calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the received air interface transmission duration sent by the terminal equipment.
In the embodiment of the disclosure, the difference value between the interaction time length and the response time length is calibrated as the air interface transmission time length of the vehicle and the terminal equipment, and the air interface transmission time length is stored in association with the identification of the terminal equipment, so that when the vehicle interacts with the signaling of the terminal equipment, the corresponding air interface transmission time length can be queried according to the identification of the terminal equipment carried in the signaling during the signaling interaction.
In one embodiment of the disclosure, the terminal device may immediately send the air interface transmission duration to the vehicle after determining the air interface transmission duration, or the terminal device may reserve the air interface transmission duration after determining the air interface transmission duration, and when the next signaling interaction is performed, the air interface transmission duration is carried by signaling, and when each signaling interaction is performed, the terminal device may further carry the air interface transmission duration in signaling, so that the vehicle will not need to save the air interface transmission durations of the terminal device and the vehicle.
Through the technical scheme, the terminal equipment can send the calibration request to the vehicle, and the air interface transmission duration is interactively completed, so that the air interface transmission duration can be accurately determined, and the problem that a large error exists between the vehicle and the time synchronization of the terminal equipment due to inaccurate air interface transmission duration is avoided.
Optionally, the packet duration is determined by:
the method comprises the steps of obtaining system time from a system interface, and determining a first duration of a protocol data packet of an application for wrapping the system time to a mobile terminal.
In the embodiment of the disclosure, the system interface is an interface of a time stamp acquisition link of the terminal device, and the system time can be acquired from the interface, so that the duration of the protocol data packet of the application of the terminal device for packaging the system time to the terminal device is a first duration.
And determining a second duration for transmitting the protocol data packet from the air interface of the mobile terminal.
In the embodiment of the present disclosure, a duration of air interface transmission for calling a protocol data packet from an application of a terminal device to the terminal device is a second duration.
And determining the packet duration according to the system time, the first duration and the second duration.
In the embodiment of the disclosure, the first duration and the second duration are added on the basis of the system time to obtain the packet duration of the terminal equipment during signaling interaction.
Optionally, the parsing time period is determined by:
and determining a third time period from receiving the protocol data packet from the air interface of the vehicle to reporting the protocol data packet to a protocol layer.
In the embodiment of the disclosure, when the vehicle receives the protocol data packet, the duration from the time of receiving to the time of reporting the protocol data packet to the protocol layer of the vehicle is a third duration.
And determining a fourth duration for the protocol layer to analyze and report the protocol data packet to the vehicle-mounted application.
In the embodiment of the disclosure, a protocol layer of a vehicle analyzes a system time of a terminal device carried in a protocol data packet, and reports the system time to a vehicle-mounted application for a fourth duration.
And determining the analysis duration according to the third duration and the fourth duration.
In the embodiment of the disclosure, the sum of the third duration and the fourth duration is determined as the analysis duration for the vehicle receiving terminal device to send the protocol data packet to the analysis reporting vehicle-mounted application.
However, the demands on the clocks by applications on or in conjunction with the vehicle are not consistent. Such as HMI (Human Machine Interface, human-machine interface) large screen time display, security authentication, etc., the time requirements are as aligned as possible with the atomic time provided by GNSS and require quick access to the active time. And the remote vehicle control function, due to the signaling interaction related to the vehicle end and the cloud TSP, the clock of the application needs to be aligned with the clock of the TSP. Because the source of the TSP clock dynamically changes, the time required by the remote vehicle control function is not the GNSS atomic clock of highest accuracy, but the TSP clock. So that the signaling interactions can be performed accurately. In V2X (Vehicle to Everything, vehicle-to-outside information exchange) and other applications, the clock is highly sensitive when receiving information such as Road side sensing data transmitted by an external RSU (Road side Unit), other vehicles, or vehicle-end intention data, and therefore, the vehicle and the external device must use the same time reference and require the most accurate atomic time provided by the GNSS. If the time service main body arbitrates the time sources according to the precision, then the clock of the time source with the highest priority is used for time synchronization in the whole vehicle, and the requirements of the applications distributed by the controllers of each domain on the vehicle on different time sources cannot be met.
In view of this, in step S14, the time-synchronizing the clock of the vehicle with the clock of the terminal device according to the clock difference includes:
adding corresponding clock source identifiers to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, the network identifier and the time zone clock;
in the embodiment of the disclosure, a time service body may be configured on a vehicle, where the time service body may be any domain controller or any vehicle controller, and further the time service body may receive a clock difference, an atomic clock, a network time protocol clock, an automobile remote service provider clock, and a network identifier and a time zone clock corresponding to the terminal device, and add a corresponding clock source identifier to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, and the network identifier and the time zone clock.
Broadcasting each clock added with the clock source identification to each domain controller of the vehicle, so that each domain controller obtains the clock of the corresponding clock source in a subscription mode, and time synchronizing the clocks of the domain controllers according to the obtained clock of the clock source.
In the embodiment of the disclosure, referring to fig. 4, a timing body of a vehicle may obtain a clock difference between a terminal device and the vehicle, obtain an atomic clock from a GNSS, obtain a Network Time Protocol (NTP) clock from a remote service provider TSP, obtain a remote service provider clock from a remote service provider TSP, obtain a network identifier and a time zone clock from a network identifier and a time zone NITZ, and then add a clock source identifier to each clock according to, for example, the following text format:
Python
{
timeflag：YYY
timestamp：xxx
}
further, the timing main body may broadcast each clock with the clock source identifier added to each domain controller of the vehicle through, for example, a CAN bus, a local area network, etc., where the broadcasting of the present disclosure may be understood as broadcasting. The time service main body subscribes/receives various clock sources broadcast by the time service main body, determines the clock source needed by the domain controller according to the clock source identification and the clock source arbitration logic, and further performs time synchronization of vehicle-mounted application in the domain controller according to the determined clock source.
By way of example, the functions of HMI large screen time display, security authentication and the like can acquire an atomic clock according to a clock source identifier of a GNSS, so that an available atomic clock can be quickly acquired without waiting for the time with the highest precision continuously; the remote car control application can acquire the clock of the car remote service provider according to the clock source identification of the TSP so as to realize the time alignment of the signaling interaction between the car end and the TSP end; the applications such as V2X can acquire a high-precision atomic clock according to the atomic clock of the GNSS so as to unify the highest-precision time reference with the RSU and the like in the external environment.
According to the technical scheme, according to the alignment requirements of each vehicle-mounted application distributed on each domain of the whole vehicle on different time, a timing main body broadcasts clock sources and clock moments with different attributes to each application, and after each vehicle-mounted application acquires different time sources, the corresponding clock moments are selected based on an arbitration strategy of own service, so that each vehicle-mounted application can perform time alignment on the corresponding clock sources based on the service requirements. Each vehicle-mounted application can actively subscribe to different time sources, and logic decoupling of a time timing main body and a timing main body is realized. The time master may adjust arbitration priority logic locally without adjusting the priority logic of the upstream time master. On the basis of guaranteeing time synchronization of the vehicle, the requirements of applications distributed by controllers in each domain on the vehicle on different time sources can be met.
The embodiment of the present disclosure further provides a time synchronization device, as shown in fig. 5, including: the calibration module 510, the acquisition module 520, the determination module 530, and the synchronization module 540.
The calibration module 510 is configured to respond to the interaction between the terminal equipment and the vehicle, and calibrate the transmission duration of the air interface between the vehicle and the terminal equipment;
The acquiring module 520 is configured to acquire a packet duration of the terminal device and an analysis duration of the vehicle, where the packet duration is a duration from acquiring a system time to sending a protocol data packet from an air interface by the terminal device, and the analysis duration is a duration from receiving the protocol data packet from the air interface by the vehicle to analyzing and reporting to a vehicle-mounted application;
a determining module 530, configured to determine a clock difference between the vehicle and the terminal device according to the parsing duration, the air interface transmission duration, and the packet duration;
and the synchronization module 540 is configured to time synchronize the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment according to the clock difference.
Optionally, the calibration module 510 is configured to:
responding to the interaction action of the terminal equipment and the vehicle, and sending a vehicle calibration request to the terminal equipment;
receiving a terminal response signal sent by the terminal equipment aiming at the vehicle calibration request, and receiving a terminal accompanying signal sent by the terminal equipment, wherein the terminal accompanying signal carries a first time when the terminal equipment receives the vehicle calibration request and a second time when the terminal response signal is sent;
And calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the first time, the second time, the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request.
Optionally, the calibration module 510 is configured to:
determining interaction duration according to the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request;
determining a response time length according to the second time and the first time;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the difference value of the interaction duration and the response duration.
Optionally, the calibration module 510 is configured to:
responding to the interaction action of the terminal equipment and the vehicle, and receiving a terminal calibration request sent by the terminal equipment;
aiming at the terminal calibration request, a vehicle response signal is sent to the terminal equipment;
generating a vehicle accompanying signal according to the fifth time for transmitting the vehicle response signal and the sixth time for receiving the terminal calibration request;
transmitting the vehicle accompanying signal to the terminal equipment, so that the terminal equipment determines the air interface transmission duration of the vehicle and the terminal equipment according to the fifth time, the sixth time, the seventh time for receiving the vehicle response signal and the eighth time for transmitting the terminal calibration request;
And calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the received air interface transmission duration sent by the terminal equipment.
Optionally, the packet duration is determined by:
acquiring system time from a system interface, and determining a first duration of a protocol data packet of an application for packaging the system time to a mobile terminal;
determining a second duration of transmitting the protocol data packet from an air interface of the mobile terminal;
and determining the packet duration according to the system time, the first duration and the second duration.
Optionally, the parsing time period is determined by:
determining a third duration from receiving the protocol data packet from an air interface of the vehicle to reporting the protocol data packet to a protocol layer;
determining a fourth duration for the protocol layer to analyze and report the protocol data packet to the vehicle-mounted application;
and determining the analysis duration according to the third duration and the fourth duration.
Optionally, the synchronization module 540 is configured to:
adding corresponding clock source identifiers to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, the network identifier and the time zone clock;
Broadcasting each clock added with the clock source identification to each domain controller of the vehicle, so that each domain controller obtains the clock of the corresponding clock source in a subscription mode, and time synchronizing the clocks of the domain controllers according to the obtained clock of the clock source.
The specific manner in which the respective modules perform the operations in the time synchronization apparatus in the above embodiments has been described in detail in the embodiments related to the method, and will not be described in detail here.
The disclosed embodiments also provide a vehicle including:
a first processor;
a first memory for storing first processor-executable instructions;
wherein the first processor is configured to:
calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle;
acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application;
Determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time.
It may be noted that the first processor in the embodiments of the present disclosure may be configured to execute the executable instructions stored in the first memory to implement the time synchronization method according to any one of the preceding embodiments.
The disclosed embodiments also provide a computer readable storage medium having stored thereon computer program instructions which, when executed by a second processor, implement the steps of the time synchronization method of any of the previous embodiments.
Fig. 6 is a block diagram of a vehicle 600, according to an exemplary embodiment. For example, vehicle 600 may be a hybrid vehicle, but may also be a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other type of vehicle. The vehicle 600 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.
Referring to fig. 6, a vehicle 600 may include various subsystems, such as an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. Wherein the vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, interconnections between each subsystem and between each component of the vehicle 600 may be achieved by wired or wireless means.
In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, a navigation system, and the like.
The perception system 620 may include several sensors for sensing information of the environment surrounding the vehicle 600. For example, the sensing system 620 may include a global positioning system (which may be a GPS system, a beidou system, or other positioning system), an inertial measurement unit (inertial measurement unit, IMU), a lidar, millimeter wave radar, an ultrasonic radar, and a camera device.
Decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.
The drive system 640 may include components that provide powered movement of the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.
Some or all of the functions of the vehicle 600 are controlled by the computing platform 650. The computing platform 650 may include at least one third processor 651 and a third memory 652, the third processor 651 may execute instructions 653 stored in the third memory 652.
The third processor 651 may be any conventional processor, such as a commercially available CPU. The processor may also include, for example, an image processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable gate array, FPGA), a System On Chip (SOC), an application specific integrated Chip (Application Specific Integrated Circuit, ASIC), or a combination thereof.
The third memory 652 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
In addition to the instructions 653, the third memory 652 may store data such as road map, route information, position, direction, speed, etc. of the vehicle. The data stored by the third memory 652 may be used by the computing platform 650.
In an embodiment of the present disclosure, the third processor 651 may execute instructions 653 to perform all or part of the steps of the time synchronization method described above.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A method of time synchronization, the method comprising:
calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle;
acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application;
Determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time.
2. The time synchronization method according to claim 1, wherein the calibrating the air interface transmission duration of the vehicle and the terminal device in response to the interaction of the terminal device and the vehicle comprises:
responding to the interaction action of the terminal equipment and the vehicle, and sending a vehicle calibration request to the terminal equipment;
receiving a terminal response signal sent by the terminal equipment aiming at the vehicle calibration request, and receiving a terminal accompanying signal sent by the terminal equipment, wherein the terminal accompanying signal carries a first time when the terminal equipment receives the vehicle calibration request and a second time when the terminal response signal is sent;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the first time, the second time, the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request.
3. The time synchronization method according to claim 2, wherein the calibrating the air interface transmission duration of the vehicle and the terminal device according to the first time, the second time, the third time for receiving the terminal response signal, and the fourth time for transmitting the vehicle calibration request includes:
determining interaction duration according to the third time for receiving the terminal response signal and the fourth time for sending the vehicle calibration request;
determining a response time length according to the second time and the first time;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the difference value of the interaction duration and the response duration.
4. The time synchronization method according to claim 1, wherein the calibrating the air interface transmission duration of the vehicle and the terminal device in response to the interaction of the terminal device and the vehicle comprises:
responding to the interaction action of the terminal equipment and the vehicle, and receiving a terminal calibration request sent by the terminal equipment;
aiming at the terminal calibration request, a vehicle response signal is sent to the terminal equipment;
generating a vehicle accompanying signal according to the fifth time for transmitting the vehicle response signal and the sixth time for receiving the terminal calibration request;
Transmitting the vehicle accompanying signal to the terminal equipment, so that the terminal equipment determines the air interface transmission duration of the vehicle and the terminal equipment according to the fifth time, the sixth time, the seventh time for receiving the vehicle response signal and the eighth time for transmitting the terminal calibration request;
and calibrating the air interface transmission duration of the vehicle and the terminal equipment according to the received air interface transmission duration sent by the terminal equipment.
5. The method of any one of claims 1-4, wherein the packet duration is determined by:
acquiring system time from a system interface, and determining a first duration of a protocol data packet of an application for packaging the system time to a mobile terminal;
determining a second duration of transmitting the protocol data packet from an air interface of the mobile terminal;
and determining the packet duration according to the system time, the first duration and the second duration.
6. The time synchronization method according to any one of claims 1 to 4, wherein the parsing time period is determined by:
determining a third duration from receiving the protocol data packet from an air interface of the vehicle to reporting the protocol data packet to a protocol layer;
Determining a fourth duration for the protocol layer to analyze and report the protocol data packet to the vehicle-mounted application;
and determining the analysis duration according to the third duration and the fourth duration.
7. The time synchronization method according to any one of claims 1 to 4, characterized in that the time synchronizing the clock of the vehicle with the clock of the terminal device according to the clock difference comprises:
adding corresponding clock source identifiers to the clock difference, the atomic clock, the network time protocol clock, the automobile remote service provider clock, the network identifier and the time zone clock;
broadcasting each clock added with the clock source identification to each domain controller of the vehicle, so that each domain controller obtains the clock of the corresponding clock source in a subscription mode, and time synchronizing the clocks of the domain controllers according to the obtained clock of the clock source.
8. A time synchronization device, comprising:
the calibration module is configured to respond to the interaction action of the terminal equipment and the vehicle and calibrate the air interface transmission duration of the vehicle and the terminal equipment;
the acquisition module is configured to acquire the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of the system time to the transmission of the protocol data packet from the air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis reporting to the vehicle-mounted application;
The determining module is configured to determine a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and the synchronization module is configured to time synchronize the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment according to the clock difference.
9. A vehicle, characterized by comprising:
a first processor;
a first memory for storing first processor-executable instructions;
wherein the first processor is configured to:
calibrating the air interface transmission duration of the vehicle and the terminal equipment in response to the interaction of the terminal equipment and the vehicle;
acquiring the packet duration of the terminal equipment and the analysis duration of the vehicle, wherein the packet duration is the duration from the acquisition of system time to the transmission of a protocol data packet from an air interface of the terminal equipment, and the analysis duration is the duration from the reception of the protocol data packet from the air interface of the vehicle to the analysis and reporting to the vehicle-mounted application;
determining a clock difference between the vehicle and the terminal equipment according to the analysis duration, the air interface transmission duration and the packet duration;
and according to the clock difference, synchronizing the clock of the vehicle-mounted application on the vehicle with the clock of the terminal equipment in time.
10. A computer readable storage medium having stored thereon computer program instructions, which when executed by a second processor, implement the steps of the time synchronization method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311677065.5A CN117527123A (en) | 2023-12-07 | 2023-12-07 | Time synchronization method, device, vehicle and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311677065.5A CN117527123A (en) | 2023-12-07 | 2023-12-07 | Time synchronization method, device, vehicle and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117527123A true CN117527123A (en) | 2024-02-06 |
Family
ID=89764534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311677065.5A Pending CN117527123A (en) | 2023-12-07 | 2023-12-07 | Time synchronization method, device, vehicle and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117527123A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765578A (en) * | 2019-02-19 | 2019-05-17 | 武汉元光科技有限公司 | Bus GPS equipment clock calibration method and device |
| CN112911543A (en) * | 2021-01-04 | 2021-06-04 | 深圳市领航威科技有限公司 | Vehicle-mounted terminal, time synchronization method thereof and storage medium |
| CN116015523A (en) * | 2022-12-30 | 2023-04-25 | 合众新能源汽车股份有限公司 | Time synchronization method and device and electronic equipment |
| CN116264489A (en) * | 2021-12-15 | 2023-06-16 | 北京小米移动软件有限公司 | Clock synchronization method and device and storage medium |
| CN116506096A (en) * | 2023-06-26 | 2023-07-28 | 北京象帝先计算技术有限公司 | Clock synchronization method, system, component and equipment |
-
2023
- 2023-12-07 CN CN202311677065.5A patent/CN117527123A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765578A (en) * | 2019-02-19 | 2019-05-17 | 武汉元光科技有限公司 | Bus GPS equipment clock calibration method and device |
| CN112911543A (en) * | 2021-01-04 | 2021-06-04 | 深圳市领航威科技有限公司 | Vehicle-mounted terminal, time synchronization method thereof and storage medium |
| CN116264489A (en) * | 2021-12-15 | 2023-06-16 | 北京小米移动软件有限公司 | Clock synchronization method and device and storage medium |
| CN116015523A (en) * | 2022-12-30 | 2023-04-25 | 合众新能源汽车股份有限公司 | Time synchronization method and device and electronic equipment |
| CN116506096A (en) * | 2023-06-26 | 2023-07-28 | 北京象帝先计算技术有限公司 | Clock synchronization method, system, component and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10760926B2 (en) | Method for plausibility checking of measured values of a mobile device | |
| US20190066403A1 (en) | Data collection system and data center | |
| CN111699523B (en) | Information generation device, information generation method, computer program, and in-vehicle device | |
| US10234568B2 (en) | GNSS vehicle location involving overlapping roads | |
| US20150222378A1 (en) | Method and system for compensating for a time discrepancy | |
| CN111443327A (en) | Maintaining vehicle position accuracy | |
| US20180283880A1 (en) | Infrastructure to vehicle position verification | |
| US20200191978A1 (en) | Method and device for determining navigation information | |
| US20140206392A1 (en) | Receiving a service in a vehicle based on location data of a mobile device within the vehicle | |
| CN113743709A (en) | Online perceptual performance assessment for autonomous and semi-autonomous vehicles | |
| CN110198529B (en) | Clock synchronization method and device, drive test unit and storage medium | |
| JP2012105082A (en) | Communication device and data communication system | |
| CN116830487A (en) | Vehicle-road cooperation time synchronization method, vehicle-road cooperation time synchronization device and system | |
| CN117527123A (en) | Time synchronization method, device, vehicle and storage medium | |
| CN110782693B (en) | Positioning method, device and equipment | |
| CN115657647B (en) | Fault determination method, device, vehicle and storage medium | |
| CN116566534A (en) | Time synchronization method, device, vehicle and readable storage medium | |
| CN109215369B (en) | Control method, device, equipment and network equipment of ADAS system | |
| US20170285176A1 (en) | Systems and methods for locating a vehicle | |
| CN217435657U (en) | Electrical system of automatic driving vehicle and automatic driving vehicle | |
| CN116033004A (en) | Service architecture-oriented vehicle positioning system and cross-domain transmission method | |
| CN116203925A (en) | Testing method for domain controller | |
| US10802106B2 (en) | Vehicle communication control device | |
| JP2017016417A (en) | Transmission device, transmission system, and transmission method | |
| US20200244558A1 (en) | Method system and computer program for communication between electronic control units |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |