SIGNAL TRANSMISSION METHOD AND RELATED APPARATUS
A signal transmission method and an apparatus can be used in the field of autonomous driving, intelligent driving, or self driving. In embodiments of this application, a total available frequency band of a detection apparatus includes N frequency bands with same bandwidths, the N frequency bands respectively correspond to N orientation ranges, and N is an integer greater than 1. When the detection apparatus transmits a signal, a first available frequency band of the signal is determined based on an orientation of the detection apparatus, the signal is transmitted on the first available frequency band, and the first available frequency band is one of the N frequency bands. In this way, detection apparatuses in different orientation ranges use different frequency bands to transmit signals. In this way, selection of a transmission frequency band of a detection apparatus can be standardized, and interference between detection apparatuses can be reduced.
1 . A signal transmission method, applied to a detection apparatus, wherein the method comprises:
determining, based on an orientation of the detection apparatus, a first available frequency band for transmitting a signal by the detection apparatus, wherein
the first available frequency band is one of N frequency bands of a total available frequency band of the detection apparatus, the N frequency bands have same bandwidths, the N frequency bands respectively correspond to N orientation ranges, and N is an integer greater than 1 ; and
when a transmission bandwidth requirement range of the detection apparatus is greater than 1/N of the total available frequency band of the detection apparatus, the N frequency bands overlap; and
transmitting a signal on the first available frequency band.
2 . The method according to claim 1 , wherein that the N frequency bands overlap comprises:
an overlapping range exists between edge parts of any two adjacent frequency bands in the N frequency bands.
3 . The method according to claim 1 , wherein when the transmission bandwidth requirement range of the detection apparatus is less than 1/N of the total available frequency band of the detection apparatus,
the N frequency bands do not overlap.
4 . The method according to claim 1 , wherein the total available frequency band comprises M frequency sub-bands, the M frequency sub-bands do not overlap, M is an integer, and M>N; and
each of the N frequency bands occupies K consecutive frequency sub-bands of the M frequency sub-bands, and frequency spacings between center frequencies of the N frequency bands are the same.
5 . The method according to claim 4 , wherein K=M−N+ 1 , and an overlapping range of any two adjacent frequency bands of the N frequency bands is M−N frequency sub-bands.
6 . The method according to claim 5 , wherein M, N, the transmission bandwidth requirement range B w of the detection apparatus, and the total available frequency band B band of the detection apparatus satisfy the following formula:
M
-
N
M
-
1
B
band
<
B
w
≤
M
-
N
+
1
M
B
band
.
7 . The method according to claim 1 , wherein a sum of the N orientation ranges is 360°; and
N=4, and each of the N orientation ranges occupies 90°.
8 . The method according to claim 7 , wherein the N orientation ranges are obtained through division by using four basic bearings as boundaries, and the four basic bearings are east, south, west, and north.
9 . The method according to claim 1 , wherein in the N orientation ranges, center frequencies of frequency bands corresponding to N/2 orientation ranges that are passed through in a clockwise direction starting from a first orientation sequentially change;
center frequencies of frequency bands corresponding to N/2 orientation ranges that are passed through in an anticlockwise direction starting from the first orientation sequentially change; and
the sequentially changing is sequentially ascending or sequentially descending.
10 . The method according to claim 1 , wherein in the N orientation ranges, center frequencies of frequency bands corresponding to the N orientation ranges that are passed through in a clockwise direction starting from a first orientation sequentially change, and the sequentially changing is sequentially ascending or sequentially descending.
11 . The method according to claim 1 , wherein the transmitting a signal on the first available frequency band comprises:
transmitting the signal on a first frequency range, wherein the first frequency range is comprised in the first available frequency band, and
interference of the first frequency range is less than interference in a frequency range of a non-first frequency range in the first available frequency band, and/or the first frequency range is a frequency range away from the first frequency band in the first available frequency band, the first frequency band is a frequency band corresponding to a first orientation range in the N orientation ranges, and a reverse direction of the orientation of the detection apparatus falls within the first orientation range.
12 . The method according to claim 1 , wherein the method further comprises:
determining, based on the orientation of the detection apparatus, a first available time period for transmitting a signal by the detection apparatus, wherein
the first available time period is one of S time periods of a total available time period of the detection apparatus, S≤N, and one of the S time periods corresponds to at least one of the N orientation ranges; and
the transmitting a signal on the first available frequency band comprises:
transmitting the signal on the first available frequency band in the first available time period.
13 . An 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:
determine, based on an orientation of the detection apparatus, a first available frequency band for transmitting a signal by the detection apparatus, wherein
the first available frequency band is one of N frequency bands of a total available frequency band of the detection apparatus, the N frequency bands have same bandwidths, the N frequency bands respectively correspond to N orientation ranges, and N is an integer greater than 1; and
when a transmission bandwidth requirement range of the detection apparatus is greater than 1/N of the total available frequency band of the detection apparatus, the N frequency bands overlap; and
transmit a signal on the first available frequency band.
14 . The apparatus according to claim 13 , wherein that the N frequency bands overlap comprises:
an overlapping range exists between edge parts of any two adjacent frequency bands in the N frequency bands.
15 . The apparatus according to claim 13 , wherein when the transmission bandwidth requirement range of the detection apparatus is less than 1/N of the total available frequency band of the detection apparatus,
the N frequency bands do not overlap.
16 . The apparatus according to claim 13 , wherein the total available frequency band comprises M frequency sub-bands, the M frequency sub-bands do not overlap, M is an integer, and M>N; and
each of the N frequency bands occupies K consecutive frequency sub-bands of the M frequency sub-bands, and frequency spacings between center frequencies of the N frequency bands are the same.
17 . The apparatus according to claim 16 , wherein K=M−N+1, and an overlapping range of any two adjacent frequency bands of the N frequency bands is M−N frequency sub-bands.
18 . The apparatus according to claim 17 , wherein M, N, the transmission bandwidth requirement range B w of the detection apparatus, and the total available frequency band B band of the detection apparatus satisfy the following formula:
M
-
N
M
-
1
B
band
<
B
w
≤
M
-
N
+
1
M
B
band
.
19 . The apparatus according to claim 13 , wherein a sum of the N orientation ranges is 360°; and
N=4, and each of the N orientation ranges occupies 90°.
20 . The apparatus according to claim 19 , wherein the N orientation ranges are obtained through division by using four basic bearings as boundaries, and the four basic bearings are east, south, west, and north.