Method for Implementing Radar-Communication Integration of Vehicle, Related Device, and System

Patent metadata

Field	Value
Publication number	US-2021003661-A1
Application number	US-202017026884-A
Country	US
Kind code	A1
Filing date	Sep 21, 2020
Priority date	Apr 28, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

A method for implementing radar-communication integration of a vehicle, where the method includes obtaining, by a radar device of a first vehicle, a first communication message, modulating the first communication message into a first carrier signal, where an operating frequency of the first carrier signal is in an operating band of the radar device, sending a periodic radar signal, and sending the first carrier signal to a second vehicle within a time gap between sending of a radar signal in a current period and sending of a radar signal in a next period.

First claim

What is claimed is:

1 . A method for implementing radar-communication integration of a first vehicle implemented by a first radar device of the first vehicle, wherein the method comprises:
obtaining a first communication message through a Controller Area Network (CAN) interface; modulating the first communication message onto a first carrier signal, wherein an operating frequency of the first carrier signal is in an operating band of the first radar device; sending a periodic radar signal using a transmit antenna of the first radar device; sending a first radar signal at a first time in a current period; sending a second radar signal at a second time in a next period; and sending the first carrier signal to a second vehicle within a time gap between the first time and the second time.

2 . The method of claim 1 , further comprising:
combining, using a monolithic microwave integrated circuit (MMIC) of the first radar device, the first carrier signal and the first radar signal into a radar-communication integration signal frame, wherein the radar-communication integration signal frame comprises the first radar signal and the first carrier signal in an alternate manner; and sending the radar-communication integration signal frame to the second vehicle using the transmit antenna.

3 . The method of claim 1 , wherein the time gap comprises a first sending time range and a first receiving time range, wherein the first sending time range indicates a first time window within which the first radar device sends the first carrier signal, wherein the first receiving time range indicates a second time window within which the first radar device receives a second carrier signal of the second vehicle, wherein the second carrier signal comprises a response to the first carrier signal, and wherein the method further comprises:
sending the first carrier signal to the second vehicle within the first sending time range using the transmit antenna of the first radar device; and receiving, within the first receiving time range using a receive antenna of the first radar device, the second carrier signal from the second vehicle, wherein the second carrier signal carries a second communication message that is a response to the first communication message.

4 . The method of claim 3 , wherein the first communication message comprises first synchronization information indicating the first sending time range to enable the second vehicle to adjust, based on the first sending time range, a second receiving time range of the second vehicle to keep synchronization with the first sending time range, and wherein the second receiving time range indicates a third time window within which the second vehicle receives the first carrier signal.

5 . The method of claim 3 , wherein the second communication message comprises second synchronization information indicating a second sending time range, wherein the second sending time range indicates a fourth time window within which a second radar device of the second vehicle sends the second communication message, and wherein the method further comprises:
obtaining the second sending time range based on the second synchronization information; and adjusting the first receiving time range within the time gap such that the first receiving time range is synchronized with the second sending time range, and a first duration of the first receiving time range is consistent with a second duration of the second sending time range.

6 . The method of claim 1 , wherein the first communication message further comprises first status information of the first vehicle indicating one or more of a driving speed, an acceleration, steering, or a location of the first vehicle.

7 . The method of claim 1 , wherein the first communication message further comprises a request for second status information of the second vehicle indicating a request for one or more of a driving speed, an acceleration, steering, or a location of the second vehicle.

8 . A method for implementing radar-communication integration of a second vehicle implemented by a radar device of the second vehicle, wherein the method comprises:
receiving, using a receive antenna of the radar device, a first carrier signal from a first vehicle within a time gap between sending of radar signals in adjacent periods; and demodulating the first carrier signal to obtain a first communication message.

9 . The method of claim 8 , wherein the first communication message comprises first synchronization information indicating a first sending time range, wherein the first sending time range indicates a first time window within which the first vehicle sends the first carrier signal, wherein a second receiving time range and a second sending time range are configured in the radar device, wherein both the second receiving time range and the second sending time range are within a second time gap within which the radar device sends second radar signals in second adjacent periods, wherein a fixed time interval is between the second receiving time range and the second sending time range and is a positive number greater than zero, wherein the second receiving time range indicates a second time window within which the radar device receives the first carrier signal, wherein the second sending time range indicates a third time window within which the radar device sends a second carrier signal to the first vehicle, wherein the second carrier signal is a response to the first carrier signal, and wherein the method further comprises:
adjusting the second receiving time range using a microcontroller unit (MCU) of the radar device after obtaining the first communication message, wherein the second receiving time range is synchronized with the first sending time range, and wherein a second duration of the second receiving time range is consistent with a first duration of the first sending time range; and returning the second carrier signal to the first vehicle within the second sending time range using a transmit antenna of the radar device, wherein the second carrier signal carries a second communication message that is a response to the first communication message.

10 . The method of claim 9 , wherein the second communication message comprises second synchronization information indicating the second sending time range to enable the first vehicle to adjust, based on the second sending time range, a first receiving time range of the first vehicle to keep synchronization with the second sending time range, and wherein the first receiving time range indicates a fourth time window within which the first vehicle receives the second carrier signal.

11 . A first radar device of a first vehicle comprising:
a Controller Area Network (CAN) interface configured to obtain a first communication message; a microcontroller unit (MCU) coupled to the CAN interface; a monolithic microwave integrated circuit (MMIC) coupled to the CAN interface and the MCU and configured to:
modulate the first communication message into a first carrier signal, wherein an operating frequency of the first carrier signal is in an operating band of the first radar device; and
generate a periodic radar signal;
a transmit antenna coupled to the MMIC and configured to:
send a periodic radar signal;
send a first radar signal at a first time in a current period;
send a second radar signal at a second time in a next period; and
send the first carrier signal to a second vehicle within a time gap between the first time and the second time; and
a receive antenna coupled to the MMIC.

12 . The first radar device of claim 11 , wherein the MMIC is further configured to c

Assignees

• Huawei Tech Co Ltd

Inventors

• Xu Shaofeng
• Zhang Zhiwei
• Zhai Botao
• Peng Xueming

Classifications

• G01S7/023

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title

• G01S7/0235

  Avoidance by time multiplex · CPC title

• H04W56/0015

  one node acting as a reference for the others · CPC title

• H04L27/12

  Modulator circuits; Transmitter circuits · CPC title

• H04W4/46

  for vehicle-to-vehicle communication [V2V] · CPC title