CN-116032403-B - Timing synchronization method, device, equipment and storage medium of vehicle-mounted equipment

CN116032403BCN 116032403 BCN116032403 BCN 116032403BCN-116032403-B

Abstract

The embodiment of the invention discloses a timing synchronization method, a timing synchronization device, timing synchronization equipment and a storage medium of vehicle-mounted equipment. The method comprises the steps of receiving reference timing synchronization information sent by at least one reference road side device when GPS timing synchronization information is not acquired by target vehicle-mounted devices, wherein the GPS timing synchronization information is not acquired by each reference road side device, and performing timing synchronization on the target vehicle-mounted devices according to each reference timing synchronization information. The scheme of the embodiment of the invention can realize accurate timing synchronization of the vehicle-mounted equipment when the road side equipment cannot acquire the GPS signal, and provides guarantee for follow-up service.

Inventors

LIU JIA
MEI XIAOHUA
HAN HAITAO
WANG SHUO
GAO XIANMING

Assignees

宸芯科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20211022

Claims (8)

1. A timing synchronization method of an in-vehicle apparatus, comprising: when the target vehicle-mounted equipment does not acquire GPS timing synchronization information of a global positioning system, receiving reference timing synchronization information sent by at least one reference road side equipment, wherein each reference road side equipment does not acquire the GPS timing synchronization information; Performing timing synchronization on the target vehicle-mounted equipment according to each piece of reference timing synchronization information; The method further comprises the steps of: when the target vehicle-mounted equipment detects that the SPECIAL FRAME IND field in SCI1 carried by the PSCCH channel is indicated as 1 and rsu _id carried by the PSSCH channel is matched with sync rsu-id preconfigured by the equipment, timing adjustment and frequency offset correction are carried out on the local synchronous state based on the timing deviation and the frequency deviation detected in the data receiving process, so that dynamic maintenance of synchronous precision is realized; before receiving the reference timing synchronization information sent by the at least one reference roadside device, the method further comprises: timing synchronization is carried out on each reference road side device; the step of performing timing synchronization on each reference road side device includes: the reference road side equipment sequentially acquires standard timing synchronization information sent by target road side equipment at fixed time, wherein the target road side equipment acquires the standard timing synchronization information which is GPS timing synchronization information; And each reference road side device updates the corresponding reference timing synchronization information according to the acquired standard timing synchronization information so as to perform timing synchronization on each reference road side device.
2. The method of claim 1, wherein the standard timing synchronization information carries a physical subframe number of a current frame and an identification of the target roadside device.
3. The method according to claim 2, wherein the timing synchronization of the target in-vehicle device according to each of the reference timing synchronization information includes: When the identification of the target reference road side equipment received by the target vehicle-mounted equipment through the preset channel is matched with the preset reference equipment identification, timing adjustment and frequency adjustment are carried out according to the received timing deviation and frequency deviation, so that timing synchronization is carried out on the target vehicle-mounted equipment.
4. A method according to claim 3, characterized in that the preset channel is a PSCCH and/or PSSCH channel.
5. The method according to claim 4, wherein the PSCCH and/or PSSCH channel comprises at least two cells; each cell carries a physical subframe number of the current frame and an identifier of the target road side device.
6. A timing synchronization apparatus of an in-vehicle apparatus, comprising: The system comprises a reference timing synchronization information receiving module, a GPS timing synchronization information processing module and a GPS timing synchronization information processing module, wherein the reference timing synchronization information receiving module is used for receiving reference timing synchronization information sent by at least one reference road side device when the GPS timing synchronization information is not acquired by target vehicle-mounted equipment; the timing synchronization module is used for performing timing synchronization on the target vehicle-mounted equipment according to the reference timing synchronization information; The device also comprises a synchronous state adjusting module for When the target vehicle-mounted equipment detects that the SPECIAL FRAME IND field in SCI1 carried by the PSCCH channel is indicated as 1 and rsu _id carried by the PSSCH channel is matched with sync rsu-id preconfigured by the equipment, timing adjustment and frequency offset correction are carried out on the local synchronous state based on the timing deviation and the frequency deviation detected in the data receiving process, so that dynamic maintenance of synchronous precision is realized; the timing synchronization device of the vehicle-mounted equipment further comprises a reference road side equipment timing synchronization module, a timing synchronization module and a timing synchronization module, wherein the reference road side equipment timing synchronization module is used for performing timing synchronization on each reference road side equipment; the reference road side equipment timing synchronization module is specifically used for sequentially acquiring standard timing synchronization information sent by target road side equipment at regular time by each reference road side equipment, wherein the target road side equipment has acquired the standard timing synchronization information which is GPS timing synchronization information; And each reference road side device updates the corresponding reference timing synchronization information according to the acquired standard timing synchronization information so as to perform timing synchronization on each reference road side device.
7. A timing synchronization apparatus of an in-vehicle apparatus, characterized by comprising: One or more processors; storage means for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the timing synchronization method of the in-vehicle apparatus of any one of claims 1-5.
8. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the timing synchronization method of the in-vehicle apparatus of any one of claims 1-5.

Description

Timing synchronization method, device, equipment and storage medium of vehicle-mounted equipment Technical Field The embodiment of the invention relates to the technical field of Internet of vehicles communication, in particular to a timing synchronization method, device and equipment of vehicle-mounted equipment and a storage medium. Background Along with the continuous development of information technology, the internet of vehicles technology is also widely applied. How to synchronize the timing of the vehicle devices by the respective road side devices is a key issue of interest in the industry. At present, each road side device mainly performs timing synchronization on the vehicle-mounted device by acquiring a global positioning system (Global Positioning System, GPS) signal, but when the road side device is deployed in a tunnel or a mountain area and the like and cannot acquire the GPS signal, the road side device cannot perform timing synchronization of the road side device and the vehicle-mounted device. Disclosure of Invention The embodiment of the invention provides a timing synchronization method, a timing synchronization device, timing synchronization equipment and a timing synchronization storage medium for vehicle-mounted equipment, so that when road side equipment cannot acquire GPS signals, the vehicle-mounted equipment is accurately timing synchronized, and guarantee is provided for follow-up business. In a first aspect, an embodiment of the present invention provides a timing synchronization method of an on-vehicle device, where the method includes: when the target vehicle-mounted equipment does not acquire GPS timing synchronization information of a global positioning system, receiving reference timing synchronization information sent by at least one reference road side equipment, wherein each reference road side equipment does not acquire the GPS timing synchronization information; And carrying out timing synchronization on the target vehicle-mounted equipment according to each piece of reference timing synchronization information. In an optional implementation manner of this embodiment, before receiving the reference timing synchronization information sent by the at least one reference roadside device, the method further includes: and carrying out timing synchronization on each reference road side device. In an optional implementation manner of this embodiment, the performing timing synchronization on each reference roadside device includes: the reference road side equipment sequentially acquires standard timing synchronization information sent by target road side equipment at fixed time, wherein the target road side equipment acquires the standard timing synchronization information which is GPS timing synchronization information; And each reference road side device updates the corresponding reference timing synchronization information according to the acquired standard timing synchronization information so as to perform timing synchronization on each reference road side device. In an optional implementation manner of this embodiment, the standard timing synchronization information carries a physical subframe number of the current frame and an identifier of the target roadside device. In an optional implementation manner of this embodiment, the performing timing synchronization on the target vehicle device according to each piece of reference timing synchronization information includes: When the identification of the target reference road side equipment received by the target vehicle-mounted equipment through the preset channel is matched with the preset reference equipment identification, timing adjustment and frequency adjustment are carried out according to the received timing deviation and frequency deviation, so that timing synchronization is carried out on the target vehicle-mounted equipment. In an alternative implementation manner of this embodiment, the preset channel is a PSCCH and/or PSSCH channel. In an alternative implementation of this embodiment, the PSCCH and/or PSSCH channel comprises at least two cells; each cell carries a physical subframe number of the current frame and an identifier of the target road side device. In a second aspect, an embodiment of the present invention further provides a timing synchronization apparatus for a vehicle device, where the apparatus includes: The system comprises a reference timing synchronization information receiving module, a GPS timing synchronization information processing module and a GPS timing synchronization information processing module, wherein the reference timing synchronization information receiving module is used for receiving reference timing synchronization information sent by at least one reference road side device when the GPS timing synchronization information is not acquired by target vehicle-mounted equipment; and the timing synchronization module is used for performing timing synchronization on the target vehicle