COMMUNICATION METHOD AND APPARATUS, STORAGE MEDIUM, AND PROGRAM
A transmitter generates a V2X message, where the V2X message includes reference object indication information and position indication information, the reference object indication information indicates at least one reference object, and the position indication information indicates a position of a target object relative to the at least one reference object; the transmitter sends the V2X message to a receiver; and the receiver determines target position information of the target object based on the reference object indication information and the position indication information. In the foregoing process, the transmitter transfers relative position information relative to the reference object to the receiver by using the V2X message, and does not need to perform deflection. In addition, the V2X message indicates a reference object on which position information is based.
1 . A communication apparatus, comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
generate a V2X message, wherein the V2X message comprises reference object indication information and position indication information, the reference object indication information indicates a first at least one reference object, and the position indication information indicates a position of a target object relative to the first at least one reference object; and
send the V2X message.
2 . The apparatus according to claim 1 , wherein the reference object indication information comprises first reference object indication information and second reference object indication information, the first reference object indication information indicates a first reference object, the second reference object indication information indicates a second reference object, the position indication information comprises first position information and second position information, the first position information indicates a position of the target object relative to the first reference object, and the second position information indicates a position of the target object relative to the second reference object.
3 . The apparatus according to claim 1 , wherein the target object is an event, the position indication information comprises first area information and second area information, the first area information indicates a first geographic area in which the event occurs, and the second area information indicates a second geographic area affected by the event.
4 . The apparatus according to claim 1 , wherein the V2X message further comprises reference object information, the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.
5 . The apparatus according to claim 1 , wherein the programming instructions are for execution by the at least one processor to:
sending reference object information, wherein the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.
6 . The apparatus according to claim 5 , wherein both the reference object information and the V2X message are periodically sent messages, and a sending frequency of the reference object information is not higher than a sending frequency of the V2X message.
7 . The apparatus according to claim 6 , wherein the second at least one reference object is the first at least one reference object.
8 . The apparatus according to claim 6 , wherein the V2X message is a periodically non-repeated message, and the reference object information is a periodically repeated message.
9 . The apparatus according to claim 5 , wherein the reference object information comprises first reference object information and second reference object information, and the first reference object information and the second reference object information are sent in packets; and
the first reference object information indicates an identifier, in the geographic area, of each reference object in a third at least one reference object, and indicates a position of each reference object in the third at least one reference object, the second reference object information indicates an identifier, in the geographic area, of each reference object in a fourth at least one reference object, and indicates a position of each reference object in the fourth at least one reference object, and the second at least one reference object comprises the third at least one reference object and the fourth at least one reference object.
10 . The apparatus according to claim 4 , wherein the reference object information further indicates at least one of the following content:
current version information;
previous version information;
an update status of each reference object;
a type of each reference object;
a priority of each reference object;
position precision of each reference object;
confidence of each reference object;
a map element associated with each reference object; and
an identifier of the geographic area.
11 . A communication apparatus, comprising:
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
receive a V2X message, wherein the V2X message comprises reference object indication information and position indication information, the reference object indication information indicates a first at least one reference object, and the position indication information indicates a position of a target object relative to the first at least one reference object; and
determine target position information of the target object based on the reference object indication information and the position indication information.
12 . The apparatus according to claim 11 , wherein the reference object indication information comprises first reference object indication information and second reference object indication information, the first reference object indication information indicates a first reference object, the second reference object indication information indicates a second reference object, the position indication information comprises first position information and second position information, the first position information indicates a position of the target object relative to the first reference object, and the second position information indicates a position of the target object relative to the second reference object.
13 . The apparatus according to claim 11 , wherein the target object is an event, the position indication information comprises first area information and second area information, the first area information indicates a first geographic area in which the event occurs, and the second area information indicates a second geographic area affected by the event.
14 . The apparatus according to claim 11 , wherein the V2X message further comprises reference object information, the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.
15 . The apparatus according to claim 11 , wherein the programming instructions are for execution by the at least one processor to:
receive reference object information, wherein the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.
16 . The apparatus according to claim 15 , wherein both the reference object information and the V2X message are periodically sent messages, and a sending frequency of the reference object information is not higher than a sending frequency of the V2X message.
17 . The apparatus according to claim 16 , wherein the second at least one reference object is the first at least one reference object.
18 . The apparatus according to claim 16 , wherein the V2X message is a periodically non-repeated message, and the reference object information is a periodically repeated message.
19 . The apparatus according to claim 15 , wherein the reference object information comprises first reference object information and second reference object information, and the first reference object information and the second reference object information are received in packets; and
the first reference object information indicates an identifier, in the geographic area, of each reference object in a third at least one reference object, and indicates a position of each reference object in the third at least one reference object, the second reference object information indicates an identifier, in the geographic area, of each reference object in a fourth at least one reference object, and indicates a position of each reference object in the fourth at least one reference object, and the second at least one reference object comprises the third at least one reference object and the fourth at least one reference object.
20 . The apparatus according to claim 14 , wherein the reference object information further indicates at least one of the following content:
current version information;
previous version information;
an update status of each reference object;
a type of each reference object;
a priority of each reference object;
position precision of each reference object;
confidence of each reference object;
a map element associated with each reference object; and
an identifier of the geographic area.
21 . The apparatus according to claim 14 , wherein the programming instructions are for execution by the at least one processor to:
determine the target position information of the target object based on the reference object indication information, the position indication information, and the reference object information.
22 . The apparatus according to claim 21 , wherein the programming instructions are for execution by the at least one processor to:
determine a position of the first at least one reference object based on the reference object indication information and the reference object information; and
determine the target position information of the target object based on the position of the first at least one reference object and the position indication information.
23 . A communication method, comprising:
generating a V2X message, wherein the V2X message comprises reference object indication information and position indication information, the reference object indication information indicates a first at least one reference object, and the position indication information indicates a position of a target object relative to the first at least one reference object; and
sending the V2X message.
24 . The method according to claim 23 , wherein the reference object indication information comprises first reference object indication information and second reference object indication information, the first reference object indication information indicates a first reference object, the second reference object indication information indicates a second reference object, the position indication information comprises first position information and second position information, the first position information indicates a position of the target object relative to the first reference object, and the second position information indicates a position of the target object relative to the second reference object.
25 . The method according to claim 23 , wherein the target object is an event, the position indication information comprises first area information and second area information, the first area information indicates a first geographic area in which the event occurs, and the second area information indicates a second geographic area affected by the event.
26 . The method according to claim 23 , wherein the V2X message further comprises reference object information, the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.
27 . A communication method, comprising:
receiving a V2X message, wherein the V2X message comprises reference object indication information and position indication information, the reference object indication information indicates a first at least one reference object, and the position indication information indicates a position of a target object relative to the first at least one reference object; and
determining target position information of the target object based on the reference object indication information and the position indication information.
28 . The method according to claim 27 , wherein the reference object indication information comprises first reference object indication information and second reference object indication information, the first reference object indication information indicates a first reference object, the second reference object indication information indicates a second reference object, the position indication information comprises first position information and second position information, the first position information indicates a position of the target object relative to the first reference object, and the second position information indicates a position of the target object relative to the second reference object.
29 . The method according to claim 27 , wherein the target object is an event, the position indication information comprises first area information and second area information, the first area information indicates a first geographic area in which the event occurs, and the second area information indicates a second geographic area affected by the event.
30 . The method according to claim 27 , wherein the V2X message further comprises reference object information, the reference object information indicates an identifier, in a geographic area, of each reference object in a second at least one reference object, and indicates a position of each reference object in the second at least one reference object, and the second at least one reference object comprises the first at least one reference object.