Resource determining method and apparatus
This application discloses a resource determining method and an apparatus. In the method, a terminal obtains first indication information and second indication information, where the first indication information is used to indicate a slot in which the terminal sends or receives an SA, and the second indication information is used to indicate a slot format of the slot; and the terminal determines SA resources in the slot based on the slot format.
1. A resource determining method, comprising:
obtaining, by a terminal, first indication information and second indication information, wherein the first indication information is used to indicate a slot in which the terminal sends or receives a scheduling assignment (SA), and the second indication information is used to indicate a slot format of the slot; and
determining, by the terminal, SA resources in the slot based on the slot format.
2. The method according to claim 1 , wherein the determining, by the terminal, SA resources in the slot based on the slot format comprises:
determining, by the terminal, SA frequency domain resources in the slot based on the slot format.
3. The method according to claim 2 , wherein the determining, by the terminal, SA frequency domain resources in the slot based on the slot format comprises:
determining, by the terminal, a first quantity based on the slot format, wherein the first quantity is a quantity of resource blocks (RBs) occupied by the SA in a frequency domain; and
determining, by the terminal, the SA frequency domain resources in the slot based on the first quantity.
4. The method according to claim 3 , wherein the determining, by the terminal, a first quantity based on the slot format comprises:
determining, by the terminal, a second quantity based on the slot format, wherein the second quantity is a quantity of uplink symbols in the slot; and
determining, by the terminal, the first quantity based on a mapping relationship between the second quantity and the first quantity.
5. The method according to claim 4 , wherein the determining, by the terminal, the first quantity based on a mapping relationship between the second quantity and the first quantity comprises:
when the second quantity is greater than or equal to a preset threshold value, determining the first quantity according to the following formula:
y
=
⌊
A
x
⌋
,
wherein
x represents the second quantity, y represents the first quantity, A is a constant, and └ ┘ represents rounding down.
6. The method according to claim 3 , wherein the determining the SA frequency domain resources in the slot comprises:
determining, by the terminal, a set of the SA resources in the slot; and
selecting, by the terminal from the set of the SA resources, frequency domain resources used to send the SA, or determining, by the terminal, resources in the set of the SA resources as resources used to detect the SA.
7. The method according to claim 6 , wherein the determining, by the terminal, a set of the SA resources in the slot comprises:
determining, by the terminal, an RB comprised in m th available resources in the slot according to the following formula:
n RB =n CHRBstart +m×n CHsize +j, j= 0,1, . . . y− 1, wherein
n RB represents a number of the RB in the frequency domain, n CHRBstart represents a number of a starting RB of a sub-channel in the frequency domain, n CHsize represents a quantity of RBs comprised in the sub-channel in the frequency domain, m is an integer greater than or equal to 0, and y represents the first quantity.
8. The method according to claim 6 , wherein the determining, by the terminal, a set of the SA resources in the slot comprises:
determining, by the terminal, an RB comprised in m th available resources in the slot according to the following formula:
n
R
B
=
n
C
H
R
B
s
t
a
r
t
+
n
×
n
C
H
s
i
z
e
+
j
n
=
k
*
m
,
k
*
m
+
1
,
…
,
k
*
m
+
k
-
1
,
k
=
⌊
y
2
⌋
j
=
0
,
1
,
wherein
n RB represents a number of the RB in the frequency domain, n CHRBstart represents a number of a starting RB of a sub-channel in the frequency domain, n CHsize represents a quantity of RBs comprised in the sub-channel in the frequency domain, m is an integer greater than or equal to 0, and y represents the first quantity.
9. The method according to claim 6 , wherein the determining, by the terminal, a set of the SA resources in the slot comprises:
determining, by the terminal, an RB comprised in m th available resources in the slot according to the following formula:
n RB =n PSCCHstart +y×m+j, j= 0,1, . . . y− 1, wherein
n RB represents a number of the RB in the frequency domain, n PSCCHstart represents a number of a starting RB of resources that can be used to transmit the SA, m is an integer greater than or equal to 0, and y represents the first quantity.
10. The method according to claim 3 , further comprising:
obtaining, by the terminal, third indication information, wherein the third indication information is used to indicate that the SA frequency domain resources are m th available resources in the slot; and
determining, by the terminal, an RB comprised in the m th available resources in the slot according to one of the following formulas:
n
R
B
=
n
C
H
R
B
s
t
a
r
t
+
m
×
n
C
H
s
i
z
e
+
j
,
j
=
0
,
1
,
…
y
-
1
;
or
n
R
B
=
n
C
H
R
B
s
t
a
r
t
+
n
×
n
C
H
s
i
z
e
+
j
,
n
=
k
*
m
,
k
*
m
+
1
,
…
,
k
*
m
+
k
-
1
,
k
=
⌊
y
2
⌋
,
j
=
0
,
1
;
or
n
R
B
=
n
P
S
C
C
H
s
t
a
r
t
+
y
×
m
+
j
,
j
=
0
,
1
,
…
y
-
1
,
wherein
n RB represents a number of the RB in the frequency domain, n PSCCHstart represents a number of a starting RB of resources that can be used to transmit the SA, n CHsize represents a quantity of RBs comprised in a sub-channel in the frequency domain, and y represents the first quantity.
11. The method according to claim 3 , wherein the determining, by the terminal, SA resources in the slot based on the slot format comprises:
when the quantity of uplink symbols in the slot is greater than or equal to a preset threshold value, determining, by the terminal, the resources used to transmit the SA in the slot.
12. A resource configuration method, comprising:
sending, by a network device, first indication information and second indication information, wherein the first indication information is used to indicate a slot in which a terminal sends or receives a scheduling assignment (SA), and the second indication information is used to indicate a slot format of the slot, to enable the terminal to determine SA resources in the slot based on the slot format.
13. The method according to claim 12 , further comprising:
determining, by the network device, SA frequency domain resources in the slot based on the slot format; and
sending, by the network device, third indication information to the terminal, wherein the third indication information is used to indicate the determined SA frequency domain resources.
14. A communications device, comprising a processor, a memory, and a communications interface, wherein the memory is configured to store a program, and the processor invokes the program stored in the memory to perform:
obtaining first indication information and second indication information, wherein the first indication information is used to indicate a slot in which the communications device sends or receives a scheduling assignment (SA), and the second indication information is used to indicate a slot format of the slot; and
determining SA resources in the slot based on the slot format.
15. The communications device according to claim 14 , wherein the determining SA resources in the slot based on the slot format, comprises:
determining SA frequency domain resources in the slot based on the slot format.
16. The communications device according to claim 15 , wherein the determining SA frequency domain resources in the slot based on the slot format, comprises:
determining a first quantity based on the slot format, wherein the first quantity is a quantity of resource blocks (RBs) occupied by the SA in a frequency domain; and
determining the SA frequency domain resources in the slot based on the first quantity.
17. The communications device according to claim 16 , wherein the determining the SA frequency domain resources in the slot based on the first quantity, comprises:
determining a second quantity based on the slot format, wherein the second quantity is a quantity of uplink symbols in the slot; and
determining the first quantity based on a mapping relationship between the second quantity and the first quantity.
18. The communications device according to claim 17 , wherein the determining the first quantity based on a mapping relationship between the second quantity and the first quantity, comprises:
when the second quantity is greater than or equal to a preset threshold value, determining the first quantity according to the following formula:
y
=
⌊
A
x
⌋
,
wherein
x represents the second quantity, y represents the first quantity, A is a constant, and └ ┘ represents rounding down.
19. A communications device, comprising a processor, a memory, and a communications interface, wherein the memory is configured to store a program, and the processor invokes the program stored in the memory to perform:
sending first indication information and second indication information, wherein the first indication information is used to indicate a slot in which a terminal sends or receives a scheduling assignment (SA), and the second indication information is used to indicate a slot format of the slot, to enable the terminal to determine SA resources in the slot based on the slot format.
20. The communications device according to claim 19 , wherein the processor invokes the program stored in the memory to perform:
determining SA frequency domain resources in the slot based on the slot format; and
sending third indication information to the terminal, wherein the third indication information is used to indicate the determined SA frequency domain resources.