CN112448784A - Time-sharing time service method for motor vehicle networking - Google Patents
Time-sharing time service method for motor vehicle networking Download PDFInfo
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- CN112448784A CN112448784A CN201910821305.1A CN201910821305A CN112448784A CN 112448784 A CN112448784 A CN 112448784A CN 201910821305 A CN201910821305 A CN 201910821305A CN 112448784 A CN112448784 A CN 112448784A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000006855 networking Effects 0.000 title claims description 6
- 238000004891 communication Methods 0.000 claims abstract description 27
- 230000003111 delayed effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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- 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
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
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- 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
- H04J3/0644—External master-clock
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The invention provides a method different from satellite time service, which solves the problem of time unification between a vehicle and an accessed Internet of vehicles application system when the satellite time service is unavailable. The method of the invention obtains standard time at the server end, periodically releases time service codes through 5G and 5G communication delay compensation values of each region measured in advance, and realizes time service of the server to vehicle-mounted terminals distributed in each region.
Description
Technical Field
The invention relates to the field of Internet of vehicles, in particular to a time unified time service method for all vehicles in the Internet of vehicles.
Background
The internet of vehicles, namely the internet of things of vehicles, takes a running vehicle as an information perception object, realizes network connection between the vehicle and X (namely the vehicle and the vehicle, people, roads and a service platform) by means of a new generation of information communication technology, improves the overall intelligent driving level of the vehicle, provides safe, comfortable, intelligent and efficient driving feeling and traffic service for users, improves the traffic operation efficiency and improves the intelligent level of social traffic service.
Since the vehicle is in a moving environment at any moment, the information perceived by the vehicle will change with time, i.e., the information is time-efficient. Therefore, when the information sensed by the vehicle is sent to the internet of vehicles, the information is preferably time-stamped, so that when other nodes on the internet need the information, the information in the same time period can be selected for use according to the time stamp. In order to avoid the inconsistency of the time of use of each vehicle, time service needs to be performed on all vehicles in the internet of vehicles so as to ensure that the time stamps of the vehicles on the information are consistent.
Currently, a general time service method is to obtain standard time and then correct local time by receiving satellite signal decoding. However, when the vehicle is in an indoor parking lot or is blocked by a mountain, the satellite signal cannot be received, and time must be handed over by another method.
Disclosure of Invention
The invention uses a time service communication device supporting 5G communication and a vehicle-mounted 5G communication module, and the time service communication system is used for time service of the vehicle-mounted communication module as auxiliary time service when the vehicle-mounted device cannot receive satellite signals.
The time service communication equipment can be integrated into a module of a server of an application system, and the equipment is provided with a 5G communication function, a Beidou/GPS satellite signal receiving and time code decoding function. The device receives satellite signals through a satellite antenna, decodes standard time in real time, and then periodically issues current time service codes to all vehicle-mounted communication modules which are located in various places and connected with the application system through 5G communication. Meanwhile, the equipment also completes the information receiving and sending work of the application system and all vehicle-mounted communication equipment in each place.
Due to the relation between the distance and the network route, the time service of the vehicle networking application system received by the vehicle-mounted communication module is delayed to a certain extent, and the delayed time is different according to different areas where vehicles are located currently. Since the delay times in the same area are substantially the same, the delay value of the reception time code can be estimated by area measurement in advance.
When the area where the vehicle-mounted communication module is located changes, the delay value is firstly obtained from the vehicle networking system. And then periodically receiving the time service code of the time service communication equipment, resolving standard time from the time service code, correcting according to the delay compensation value, setting as the current time of the server, and finishing the correction of the local time. The whole time service method and system principle is shown in the attached figure 1.
Drawings
FIG. 1 is a schematic diagram of the system and method of the present invention.
Claims (4)
1. A time-sharing and time-service method of a car networking system is characterized in that a special time-service communication device is arranged on a car networking system server, and a special vehicle-mounted communication module mark is arranged on a vehicle; the time service communication equipment receives satellite signals in real time, completes standard time decoding, and then carries out time service on all vehicle-mounted communication modules through 5G communication.
2. A method as claimed in claim 1, wherein the average communications delay time between each region and the time service communications device is predetermined.
3. The method as claimed in claim 1, wherein the time service communication device adopts 5G communication release time system standard time.
4. The method as claimed in claim 1, wherein the vehicle-mounted communication module receives the standard time issued by the time service communication equipment, compensates the standard time by using the communication delay time value of the region, and then uses the time as the standard time of the vehicle-related application.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821305.1A CN112448784A (en) | 2019-09-02 | 2019-09-02 | Time-sharing time service method for motor vehicle networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821305.1A CN112448784A (en) | 2019-09-02 | 2019-09-02 | Time-sharing time service method for motor vehicle networking |
Publications (1)
| Publication Number | Publication Date |
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| CN112448784A true CN112448784A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910821305.1A Pending CN112448784A (en) | 2019-09-02 | 2019-09-02 | Time-sharing time service method for motor vehicle networking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488766A (en) * | 2022-01-25 | 2022-05-13 | 浙江赛思电子科技有限公司 | Clock time service method, device and medium |
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2019
- 2019-09-02 CN CN201910821305.1A patent/CN112448784A/en active Pending
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| KR20010056454A (en) * | 1999-12-15 | 2001-07-04 | 이계안 | Apparatus and method for displaying time in automobile |
| CN102156403A (en) * | 2010-02-12 | 2011-08-17 | 上海博泰悦臻电子设备制造有限公司 | Vehicle-mounted clock device and implementation method thereof |
| CN104734769A (en) * | 2015-03-31 | 2015-06-24 | 中铁工程设计咨询集团有限公司 | Ground equipment system based on Beidou Satellite time service signals |
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| CN105187148A (en) * | 2015-08-17 | 2015-12-23 | 武汉理工大学 | ARM-based network clock synchronization system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488766A (en) * | 2022-01-25 | 2022-05-13 | 浙江赛思电子科技有限公司 | Clock time service method, device and medium |
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