EP-4738950-A1 - DIGITAL CAR KEY POSITIONING SYSTEM AND METHOD, AND RELATED APPARATUS

EP4738950A1EP 4738950 A1EP4738950 A1EP 4738950A1EP-4738950-A1

Abstract

This application discloses a digital vehicle key positioning system and method, and a related apparatus, and pertains to the field of vehicle control technologies. In the method, a vehicle can receive location information sent by a terminal device, and determine location information of a digital vehicle key relative to the vehicle based on the location information of the terminal device and wireless signals respectively collected by a plurality of short-range wireless communication modules in the vehicle. In other words, the location information determined by the terminal device and the wireless signals collected by the vehicle are fused to implement more precise positioning of the digital vehicle key, thereby reducing a positioning error of the digital vehicle key, improving positioning precision, and effectively resolving a ping-pong problem of vehicle unlocking and locking and consistency problems of unlocking distances and locking distances.

Inventors

LI, ZHI
JIA, Qinyong
WU, Daijun

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240719

Claims (20)

A digital vehicle key positioning system, wherein the system comprises a vehicle and a terminal device, the vehicle has a plurality of short-range wireless communication modules, and the terminal device has a digital vehicle key of the vehicle; the terminal device is configured to: transmit wireless signals, and send location information of the terminal device to the vehicle; and the vehicle is configured to: receive the location information of the terminal device, respectively collect the wireless signals by using the plurality of short-range wireless communication modules, and obtain a location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signals respectively collected by the plurality of short-range wireless communication modules.
The system according to claim 1, wherein the vehicle is further configured to send a first instruction to the terminal device; and the terminal device is configured to send the location information of the terminal device to the vehicle after receiving the first instruction.
The system according to claim 2, wherein the vehicle is further configured to send a second instruction to the terminal device; and the terminal device is further configured to stop sending the location information of the terminal device to the vehicle after receiving the second instruction.
The system according to any one of claims 1 to 3, wherein the terminal device has a pedestrian dead reckoning PDR function, and the location information of the terminal device comprises PDR data.
A digital vehicle key positioning method, applied to a vehicle, wherein the vehicle has a plurality of short-range wireless communication modules, and the method comprises: receiving location information of a terminal device, wherein the terminal device has a digital vehicle key of the vehicle; respectively collecting, by using the plurality of short-range wireless communication modules, wireless signals transmitted by the terminal device; and obtaining a location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signals respectively collected by the plurality of short-range wireless communication modules.
The method according to claim 5, wherein the method further comprises: sending a first instruction to the terminal device, wherein the first instruction indicates the terminal device to send the location information of the terminal device.
The method according to claim 6, wherein the first instruction is sent when any one of a plurality of first conditions is met; and the plurality of first conditions comprise: a wireless communication connection is established between the vehicle and the terminal device; the vehicle is parked or shifted into a parking gear; and the vehicle is parked and a door of the vehicle is opened.
The method according to any one of claims 5 to 7, wherein the method further comprises: sending a second instruction to the terminal device, wherein the second instruction indicates the terminal device to stop sending the location information of the terminal device.
The method according to claim 8, wherein the second instruction is sent when any one of a plurality of second conditions is met; and the plurality of second conditions comprise: the vehicle is unlocked or the vehicle exits the parking gear; the wireless communication connection between the terminal device and the vehicle is disconnected; and the terminal device reaches a locking area of the vehicle in a process of moving away from the vehicle.
The method according to any one of claims 5 to 9, wherein the location information of the terminal device comprises information about a plurality of trajectory points; and the method further comprises: sending a third instruction to the terminal device, wherein the third instruction indicates the terminal device to determine the information about the plurality of trajectory points at a first frequency.
The method according to any one of claims 5 to 10, wherein the terminal device has a pedestrian dead reckoning PDR function, and the location information of the terminal device comprises PDR data.
The method according to any one of claims 5 to 11, wherein the method further comprises: when it is determined that the wireless signals collected by the plurality of short-range wireless communication modules meet a third condition, performing the step of obtaining the location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signals respectively collected by the plurality of short-range wireless communication modules, wherein the third condition comprises: signal strength of a plurality of consecutive frames of signals in wireless signals collected by at least P short-range wireless communication modules in the plurality of short-range wireless communication modules exceeds a signal strength threshold, wherein P is not less than 1 and is not greater than a total quantity of the plurality of short-range wireless communication modules.
The method according to any one of claims 5 to 12, wherein obtaining the location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signals respectively collected by the plurality of short-range wireless communication modules comprises: obtaining the location of the digital vehicle key relative to the vehicle based on the location information of the terminal device, the wireless signals respectively collected by the plurality of short-range wireless communication modules, and location information of the plurality of short-range wireless communication modules.
The method according to any one of claims 5 to 13, wherein each short-range wireless communication module is a Bluetooth module, an ultra-wideband UWB module, a SparkLink basic SLB module, or a SparkLink low energy SLE module.
A digital vehicle key positioning method, applied to a terminal device, wherein the terminal device has a digital vehicle key of a vehicle; and the method comprises: transmitting a wireless signal; receiving a first instruction sent by the vehicle; and sending location information of the terminal device to the vehicle after the first instruction is received, wherein the location information of the terminal device and the wireless signal are used by the vehicle to obtain a location of the digital vehicle key relative to the vehicle.
The method according to claim 15, wherein the method further comprises: receiving a second instruction sent by the vehicle; and stopping sending the location information of the terminal device to the vehicle after the second instruction is received.
The method according to claim 15 or 16, wherein the location information of the terminal device comprises information about a plurality of trajectory points; and the method further comprises: receiving a third instruction sent by the vehicle, wherein the third instruction indicates a first frequency; and after the third instruction is received, determining the information about the plurality of trajectory points at the first frequency.
The method according to any one of claims 15 to 17, wherein the terminal device has a pedestrian dead reckoning PDR function, and the location information of the terminal device comprises PDR data.
The method according to any one of claims 15 to 18, wherein the method further comprises: obtaining a fourth instruction generated based on an operation of a user on the terminal device; and after the fourth instruction is obtained, enabling a function of sending the location information of the terminal device to the vehicle.
A digital vehicle key positioning apparatus, wherein the apparatus is comprised in a vehicle, the vehicle has a plurality of short-range wireless communication modules, and the apparatus comprises: a receiving module, configured to receive location information of a terminal device, wherein the terminal device has a digital vehicle key of the vehicle; a collection module, configured to respectively collect, by using the plurality of short-range wireless communication modules, wireless signals transmitted by the terminal device; and a determining module, configured to obtain a location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signal respectively collected by the plurality of short-range wireless communication modules.

Description

This application claims priority to Chinese Patent Application No. 202310924187.3, filed on July 25, 2023 and entitled "DIGITAL VEHICLE KEY POSITIONING SYSTEM AND METHOD, AND RELATED APPARATUS", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of vehicle control technologies, and in particular, to a digital vehicle key positioning system and method, and a related apparatus. BACKGROUND A digital vehicle key uses a terminal device like a smartphone, a smart band, or a smart watch as a carrier to implement unlocking and locking control of a vehicle, start and stop control of a head unit, temperature control of an in-vehicle air conditioner, and the like. Precise control of the vehicle by using the digital vehicle key mainly depends on precise positioning of the digital vehicle key. For example, precise unlocking and locking of the vehicle is controlled by precisely positioning the digital vehicle key. In a related technology, positioning of the digital vehicle key is mainly implemented based on Bluetooth positioning. For example, a distance between the digital vehicle key and the vehicle is determined based on strength of a Bluetooth signal sent, to the vehicle, by a terminal device having the digital vehicle key. However, when a user carrying the terminal device turns around, shakes an arm, places the terminal device in a backpack or a pocket, or the like, the Bluetooth signal received by the vehicle is unstable. As a result, a positioning error of the digital vehicle key is large, and a ping-pong problem of vehicle unlocking and locking and consistency problems of unlocking distances and locking distances easily occur. SUMMARY This application provides a digital vehicle key positioning system and method, and a related apparatus, to reduce a positioning error of a digital vehicle key, improve positioning precision, and reduce a ping-pong problem of vehicle unlocking and locking and consistency problems of unlocking distances and locking distances. The technical solutions are as follows. According to a first aspect, a digital vehicle key positioning system is provided. The system includes a vehicle and a terminal device. The vehicle has a plurality of short-range wireless communication modules, and the terminal device has a digital vehicle key of the vehicle. The terminal device is configured to: transmit wireless signals, and send location information of the terminal device to the vehicle. The vehicle is configured to: collect the wireless signals by using the plurality of short-range wireless communication modules, receive the location information of the terminal device, and obtain a location of the digital vehicle key relative to the vehicle based on the location information of the terminal device and the wireless signals respectively collected by the plurality of short-range wireless communication modules. In other words, in this solution, the location information determined by the terminal device and the wireless signal collected by the vehicle are fused to implement more precise positioning of the digital vehicle key, thereby reducing a positioning error of the digital vehicle key, improving positioning precision, and effectively resolving the ping-pong problem of vehicle unlocking and locking and consistency problems of the unlocking distances and the locking distances. Optionally, the vehicle is further configured to send a first instruction to the terminal device, and the terminal device is configured to send the location information of the terminal device to the vehicle after receiving the first instruction. In other words, in this solution, the vehicle is supported in controlling the terminal device to send the location information of the terminal device. Optionally, the vehicle is further configured to send a second instruction to the terminal device, and the terminal device is further configured to stop sending the location information of the terminal device to the vehicle after receiving the second instruction. In other words, in this solution, the vehicle is supported in controlling the terminal device to stop sending the location information of the terminal device. In this way, resource consumption of the terminal device and the vehicle can be reduced to some extent. Optionally, the terminal device has a pedestrian dead reckoning (pedestrian dead reckoning, PDR) function, and the location information of the terminal device includes PDR data. In other words, this solution can be implemented by using the PDR function of the terminal device. According to a second aspect, a digital vehicle key positioning method is provided. The method is applied to a vehicle, the vehicle has a plurality of short-range wireless communication modules, and the method includes: The vehicle receives location information of a terminal device, where the terminal device has a digital vehicle key of the vehicle; the vehicle respectively collects, by using the