In-vehicle radar signal control method, electronic device, and storage medium

Patent metadata

Field	Value
Publication number	US-12379459-B2
Application number	US-202217952255-A
Country	US
Kind code	B2
Filing date	Sep 25, 2022
Priority date	Oct 29, 2020
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

An in-vehicle radar signal control method includes: determining a target interference area of a first vehicle, a vehicle in the target interference area interfering with an in-vehicle radar signal of the first vehicle; determining vehicles in the target interference area as a first vehicle cluster, and determining strength of in-vehicle radar signals of vehicles in the first vehicle cluster; determining whether a new second vehicle enters the target interference area; and in response to a determination that the second vehicle enters the target interference area, obtaining an adjustment signal; the adjustment signal indicating one or more of: increasing or reducing strength of the in-vehicle radar signal of the first vehicle, adjusting a travel speed of the first vehicle, and adjusting a travel direction of the first vehicle.

First claim

What is claimed is:

1. An in-vehicle radar signal control method, comprising:
determining a target interference area of a first vehicle, a vehicle in the target interference area interfering with an in-vehicle radar signal of the first vehicle;
determining vehicles in the target interference area as a first vehicle cluster, and determining strength of in-vehicle radar signals of vehicles in the first vehicle cluster, the first vehicle cluster including the first vehicle and a vehicle other than the first vehicle in the target interference area;
determining whether a new second vehicle enters the target interference area; and
in response to a determination that the new second vehicle enters the target interference area, obtaining an adjustment signal, wherein the obtaining the adjustment signal further comprises:
determining, based on strength of in-vehicle radar signals of vehicles in a second vehicle cluster and a second spatial volume occupied by the second vehicle cluster, second signal strength spatial density corresponding to the second vehicle cluster;
determining, based on first signal strength spatial density and the second signal strength spatial density, impact of entry of the second vehicle into the target interference area on signal density in the target interference area; and
generating the adjustment signal based on the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area, so that the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area facilitates driving safety of the first vehicle:

the adjustment signal indicating one or more of: increasing or reducing strength of the in- vehicle radar signal of the first vehicle, adjusting a travel speed of the first vehicle, and adjusting a travel direction of the first vehicle; and
the adjustment signal being generated based on the strength of the in-vehicle radar signals of the vehicles in the first vehicle cluster and strength of an in-vehicle radar signal of the second vehicle.

2. The method according to claim 1 , wherein the in-vehicle radar signal control method is performed by the first vehicle, and obtaining the adjustment signal comprises:
receiving the adjustment signal from a server or generating the adjustment signal by the first vehicle.

3. The method according to claim 1 , wherein the in-vehicle radar signal control method is performed by a server, and the method further comprises:
transmitting, by the server, the adjustment signal to the first vehicle to adjust a travel state of the first vehicle.

4. The method according to claim 3 , wherein generating the adjustment signal further comprises:
determining, based on a position of each vehicle in the first vehicle cluster, a first spatial volume occupied by the first vehicle cluster;
determining, based on the strength of the in-vehicle radar signals of the vehicles in the first vehicle cluster and the first spatial volume, the first signal strength spatial density corresponding to the first vehicle cluster;
determining a combination of the first vehicle cluster and the second vehicle as the second vehicle cluster, and determining, based on a position of the second vehicle and the strength of the in-vehicle radar signals of the vehicles in the second vehicle cluster, the second spatial volume occupied by the second vehicle cluster.

5. The method according to claim 4 , wherein generating the adjustment signal comprises:
correcting the first signal strength spatial density and the second signal strength spatial density based on a history malfunction rate of an in-vehicle radar of the first vehicle;
determining the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area based on the corrected first signal strength spatial density and the corrected second signal strength spatial density; and
generating the adjustment signal based on the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area, so that the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area facilitates driving safety of the first vehicle.

6. The method according to claim 4 , wherein generating the adjustment signal comprises:
determining a traffic accident rate in the target interference area;
determining impact of the entry of the second vehicle into the target interference area on a driving safety index in the target interference area based on the traffic accident rate;
determining, based on the first signal strength spatial density and the second signal strength spatial density, the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area; and
generating the adjustment signal based on the impact on the driving safety index in the target interference area and the impact on the signal density in the target interference area, so that the impact on the driving safety index in the target interference area is less than or equal to the impact of the entry of the second vehicle into the target interference area on the signal density in the target interference area.

7. The method according to claim 6 , wherein a number of the vehicles in the first vehicle cluster is n, the first spatial volume is V n-1 , the second spatial volume is V n , the strength of the in-vehicle radar signals of the vehicles in the first vehicle cluster other than the first vehicle is d 1 , d 2 , . . . , d n-1 respectively, the strength of the in-vehicle radar signal of the first vehicle is d 0 , the strength of the in-vehicle radar signal of the second vehicle is d n , the history malfunction rate of the in-vehicle radar of the first vehicle is p malfunction , and the traffic accident rate is p vehicle ;
wherein determining the first signal strength spatial density further comprises:
determining the first signal strength spatial density as E n-1 based on a formula

E

n
-
1

=

(

d
0

+

d
1

+

d
2

+
…
+

d

n
-
1

)

V

n
-
1

;

wherein determining the second signal strength spatial density comprises:
determining the second signal strength spatial density as E n based on a formula

E

Assignees

• Tencent Tech Shenzhen Co Ltd

Inventors

• Hou Chen

Classifications

• G01S13/931 Primary

  of land vehicles · CPC title

• G01S2013/9316

  combined with communication equipment with other vehicles or with base stations · CPC title

• G01S7/4013

  involving adjustment of the transmitted power · CPC title

• G01S2013/93272

  in the back of the vehicles · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title