Information transmission method and information transmission apparatus
This application provides an information transmission method and apparatus, relates to interference processing of a cooperative radar, and is applicable to internet of vehicles scenarios, such as a vehicle-to-everything (V2X) scenario, a long term evolution-vehicle (LTE-V) scenario, and a vehicle-to-vehicle (V2V) scenario. Therefore, information related to a transmit power can be transmitted through an interface of a radar detection apparatus, and a capability of an automated driving system or an advanced driver assistant system (ADAS) is improved, to adapt to a variable driving environment. The information transmission method includes: A first detection apparatus receives indication information, where the indication information is used to indicate the first detection apparatus to determine a first transmit power used for transmitting a radar signal; and the first detection apparatus determines the first transmit power based on the indication information.
1 . An information transmission method carried out by operation of a first detection device and a communications device, the method comprising:
receiving, by the first detection device, indication information used to instruct the first detection device to determine a first transmit power used for transmitting a radar signal;
determining, by the first detection device and in accordance with the indication information, the first transmit power;
sending, by the first detection device, for use by the communications device:
time-frequency resource information that is used to indicate a time-frequency resource used for transmitting the radar signal, and
at least one additional piece of information taken from the group consisting of:
power information used to indicate the first transmit power, and
the indication information;
receiving, by the communications device, the time-frequency resource information and the at least one additional piece of information; and
broadcasting, by the communications device, the time-frequency resource information and the at least one additional piece of information.
2 . The method according to claim 1 , further comprising:
transmitting, by the first detection device, the radar signal by using the first transmit power.
3 . The method according to claim 1 , wherein the determining the first transmit power based on the indication information comprises:
determining, by the first detection device based on the indication information, to adjust a second transmit power to the first transmit power, wherein the second transmit power is a currently used transmit power.
4 . The method according to claim 3 , wherein the indication information indicates a status of a traffic light that is closest to a terminal in a current driving direction in which the first detection device is located, and the status of the traffic light comprises a red light, a yellow light, or a green light.
5 . The method according to claim 4 , wherein the determining to adjust the second transmit power to the first transmit power comprises:
based on the status of the traffic light being the red light, determining, by the first detection device, to adjust the second transmit power to the first transmit power, wherein the first transmit power is less than or equal to the second transmit power; or
based on the status of the traffic light being the green light, determining, by the first detection device, to adjust the second transmit power to the first transmit power, wherein the first transmit power is greater than or equal to the second transmit power.
6 . The method according to claim 3 , wherein the indication information indicates a congestion status of a road in a current driving direction of a terminal in which the first detection device is located, and the congestion status of the road comprises a congested state, a normal state, or a clear state.
7 . The method according to claim 6 , wherein the determining to adjust the second transmit power to the first transmit power comprises:
based on the congestion status of the road being the congested state, determining, by the first detection device, to adjust the second transmit power to the first transmit power, wherein the first transmit power is less than or equal to the second transmit power; or
based on the congestion status of the road being the clear state, determining, by the first detection device, to adjust the second transmit power to the first transmit power, wherein the first transmit power is greater than or equal to the second transmit power.
8 . An information transmission method carried out by a first device, a first detection device and a communications device, comprising:
determining, by the first device, indication information used to instruct the first detection device to determine a first transmit power used for transmitting a radar signal;
sending, by the first device, the indication information to the first detection device; and
sending, by the first detection device, for use by the communications device:
time-frequency resource information that is used to indicate a time-frequency resource used for transmitting the radar signal, and
at least one additional piece of information taken from the group consisting of:
power information used to indicate the first transmit power, and
the indication information;
receiving, by the communications device, the time-frequency resource information and the at least one additional piece of information; and
broadcasting, by the communications device, the time-frequency resource information and the at least one additional piece of information.
9 . The method according to claim 8 , wherein the determining the indication information comprises:
receiving, by the first device, the indication information sent by a second device.
10 . The method according to claim 8 , further comprising:
receiving, by the first device, the power information sent by the first detection device based on the indication information, wherein the power information is used to indicate the first transmit power.
11 . The method according to claim 8 , wherein the indication information indicates a status of a traffic light that is closest to a terminal in a current driving direction in which the first detection device is located, and the status of the traffic light comprises a red light, a yellow light, or a green light.
12 . The method according to claim 11 , wherein the determining the indication information comprises:
obtaining, by the first device, a first image, wherein the first image comprises the traffic light that is closest to the terminal in the current driving direction in which the first detection device is located; and
determining, by the first device, the indication information based on the status of the traffic light in the first image.
13 . The method according to claim 8 , wherein the indication information indicates a congestion status of a road in a current driving direction of a terminal in which the first detection device is located, and the congestion status of the road comprises a congested state, a normal state, or a clear state.
14 . The method according to claim 13 , wherein the determining the power control information comprises:
obtaining, by the first device, a second image, wherein the second image comprises another terminal in the current driving direction of the terminal in which the first detection device is located;
determining, by the first device, the congestion status of the road based on the second image; and
determining, by the first device, the indication information based on the congestion status of the road.
15 . An apparatus, comprising:
a processor;
a receiver; and
a transmitter, wherein the receiver and the transmitter are coupled to the processor, and wherein:
the receiver is configured to receive indication information, used to instruct the first detection apparatus to determine a first transmit power used for transmitting a radar signal;
the processor is configured to determine, in accordance with the indication information, the first transmit power; and
the transmitter is configured to send, for use by a communications device:
time-frequency resource information that is used to indicate a time-frequency resource used for transmitting the radar signal, and
at least one additional piece of information taken from the group consisting of:
power information used to indicate the first transmit power, and
the indication information;
wherein the communications device is configured to broadcast the time-frequency resource information and the at least one additional piece of information.
16 . The apparatus according to claim 15 , wherein
the transmitter is configured to transmit the radar signal by using the first transmit power.
17 . The apparatus according to claim 15 , wherein
the processor is configured to determine, based on the indication information, to adjust a second transmit power to the first transmit power, wherein the second transmit power is a currently used transmit power.
18 . The apparatus according to claim 17 , wherein the indication information indicates a status of a traffic light that is closest to a terminal in a current driving direction in which the first detection device is located, and the status of the traffic light comprises a red light, a yellow light, or a green light.