Method for transmitting sounding reference signal and terminal device
A method for transmitting a sounding reference signal and a terminal device are provided. The method includes: receiving, by the terminal device, SRS configuration information from a network device; determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS; selecting the antenna port with the index of α(n SRS ) from indexes corresponding to the Λ antenna ports; and transmitting the SRS through the antenna port with the index of α(n SRS ) during an n SRS th SRS transmission. n SRS is an integer greater than or equal to 0, Λ is a positive integer greater than or equal to 4, and a symbol * indicates a multiplication operation.
1. A method, comprising:
receiving, by a terminal device, sounding reference signal (SRS) configuration information from a network device;
determining, by the terminal device and based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS, wherein n SRS is an integer greater than or equal to 0, Λ is a positive integer greater than or equal to 4, and a symbol * indicates a multiplication operation, wherein the SRS configuration information comprises one or both of b hop and B SRS , and the SRS bandwidth configuration parameter comprises one or more of N 1 , N 2 , and N 3 , wherein
each of b hop , and B SRS is any value in {0, 1, 2, 3}, N 1 , N 2 , and N 3 are positive integers, N 1 indicates a quantity of second-level sub-bandwidths into which a first-level sub-bandwidth is divided, N 2 indicates a quantity of third-level sub-bandwidths into which a second-level sub-bandwidth is divided, and N 3 indicates a quantity of fourth-level sub-bandwidths into which a third-level sub-bandwidth is divided, wherein
a value of B SRS being 0 indicates that an SRS transmission sub-bandwidth is a first-level sub-bandwidth, a value of B SRS being 1 indicates that an SRS transmission sub-bandwidth is a second-level sub-bandwidth, a value of B SRS being 2 indicates that an SRS transmission sub-bandwidth is a third-level sub-bandwidth, or a value of B SRS being 3 indicates that an SRS transmission sub-bandwidth is a fourth-level sub-bandwidth, wherein
a value of b hop being 0 indicates that an SRS frequency hopping bandwidth is a first-level sub-bandwidth, a value of b hop being 1 indicates that an SRS frequency hopping bandwidth is a second-level sub-bandwidth, a value of b hop being 2 indicates that an SRS frequency hopping bandwidth is a third-level sub-bandwidth, or a value of b hop being 3 indicates that an SRS frequency hopping bandwidth is a fourth-level sub-bandwidth, and wherein
the value of b hop is less than or equal to the value of B SRS ; and
wherein the determining, by the terminal device and based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
when Π b′=b hop B SRS N b′ (N b hop =1) is an odd number, determining, by the terminal device based on n SRS and Λ, the index α(n SRS ) corresponding to the antenna port used to transmit the SRS: or
when Π b′=b hop B SRS N b′ (N b hop =1) is an even number, determining, by the terminal device based on at least one of n SRS ,
⌊
n
SRS
max
(
Λ
,
∏
b
′
=
b
h
o
p
B
S
R
S
N
b
′
(
N
b
hop
=
1
)
)
⌋
,
and
⌊
n
SRS
Λ
⌋
,
the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein
max(Λ, Π b′=b hop B SRS N b′ (N b hop =1)) indicates a larger one of Λ and Π b′=b hop B SRS N b′ (N b hop =1), and a symbol └┘ indicates rounding down; and
wherein the index number α(n SRS ) of the antenna port used by the terminal device to transmit the SRS satisfies the following formulas:
a
(
n
SRS
)
=
{
(
n
SRS
+
α
·
⌊
n
SRS
/
max
(
Λ
,
K
)
⌋
+
β
·
⌊
n
SRS
/
Λ
⌋
)
mod
Λ
when
K
is
an
even
number
n
SRS
mod
Λ
when
K
is
an
odd
number
.
wherein
K=Π b′=b hop B SRS N b′ (N b hop =1), a symbol mod indicates a modulo budget,
α
=
{
0
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
,
N
B
SRS
is
an
odd
number
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
6
}
1
others
,
and
β
=
{
1
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
4
}
0
others
;
selecting, by the terminal device, the antenna port with the index of α (n SRS ) from indexes corresponding to the Λ antenna ports; and
transmitting, by the terminal device, the SRS through the antenna port with the index of α(n SRS ) during an n SRS th SRS transmission.
2. The method according to claim 1 , wherein N 1 =N 2 =2, or b hop =1, B SRS =3, N 2 =2, and N 3 =4, and wherein
the determining, by the terminal device and based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
determining, by the terminal device and based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, N 1 , and N 2 or based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, b hop , B SRS , N 2 , and N 3 , the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein the index α(n SRS ) corresponding to the antenna port used to transmit the SRS for an n SRS th time is different from an index α(n SRS +Λ) corresponding to an antenna port used to transmit the SRS for an (n SRS +Λ) th time.
3. A terminal device, comprising:
at least one processor; and
a memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions, when executed, cause the terminal device to perform operations comprising:
receiving sounding reference signal (SRS) configuration information from a network device;
determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS, wherein n SRS is an integer greater than or equal to 0, Λ is a positive integer greater than or equal to 4, and a symbol * indicates a multiplication operation, wherein the SRS configuration information comprises one or both of b hop , and B SRS , and the SRS bandwidth configuration parameter comprises one or more of N 1 , N 2 , and N 3 , wherein
each of b hop , and B SRS is any value in {0, 1, 2, 3}, N 1 , N 2 , and N 3 are positive integers, N 1 indicates a quantity of second-level sub-bandwidths into which a first-level sub-bandwidth is divided, N 2 indicates a quantity of third-level sub-bandwidths into which a second-level sub-bandwidth is divided, and N 3 indicates a quantity of fourth-level sub-bandwidths into which a third-level sub-bandwidth is divided, wherein
a value of B SRS being 0 indicates that an SRS transmission sub-bandwidth is a first-level sub-bandwidth, a value of B SRS being 1 indicates that an SRS transmission sub-bandwidth is a second-level sub-bandwidth, a value of B SRS being 2 indicates that an SRS transmission sub-bandwidth is a third-level sub-bandwidth, or a value of B SRS being 3 indicates that an SRS transmission sub-bandwidth is a fourth-level sub-bandwidth, wherein
a value of b hop , being 0 indicates that an SRS frequency hopping bandwidth is a first-level sub-bandwidth, a value of b hop being 1 indicates that an SRS frequency hopping bandwidth is a second-level sub-bandwidth, a value of b hop being 2 indicates that an SRS frequency hopping bandwidth is a third-level sub-bandwidth, or a value of b hop being 3 indicates that an SRS frequency hopping bandwidth is a fourth-level sub-bandwidth, and wherein
the value of b hop is less than or equal to the value of B SRS ; and
wherein the determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
when Π b′=b hop B SRS N b′ (N b hop =1) is an odd number, determining, based on n SRS and Λ, the index α(n SRS ) corresponding to the antenna port used to transmit the SRS: or
when Π b′=b hop B SRS N b′ (N b hop =1) is an even number, determining, based on at last one of n SRS ,
⌊
n
SRS
max
(
Λ
,
∏
b
′
=
b
h
o
p
B
S
R
S
N
b
′
(
N
b
hop
=
1
)
)
⌋
,
and
⌊
n
SRS
Λ
⌋
,
and the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein
max(Λ, Π b′=b hop B SRS N b′ (N b hop =1)) indicates a larger one of Λ and Π b′=b hop B SRS N b′ (N b hop =1) and a symbol └┘ indicates rounding down; and
wherein the index number α(n SRS ) of the antenna port used by the terminal device to transmit the SRS satisfies the following formulas:
a
(
n
SRS
)
=
{
(
n
SRS
+
α
·
⌊
n
SRS
/
max
(
Λ
,
K
)
⌋
+
β
·
⌊
n
SRS
/
Λ
⌋
)
mod
Λ
when
K
is
an
even
number
n
SRS
mod
Λ
when
K
is
an
odd
number
,
wherein
K=Π b′=b hop B SRS N b′ (N b hop =1) a symbol mod indicates a modulo budget,
α
=
{
0
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
,
N
B
SRS
is
an
odd
number
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
6
}
1
others
,
and
β
=
{
1
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
4
}
0
others
;
selecting the antenna port with the index of α(n SRS ) from indexes corresponding to the Λ antenna ports; and
transmitting the SRS through the antenna port with the index of α(n SRS ) during an n SRS th transmission.
4. The terminal device according to claim 3 , wherein N 1 =N 2 =2, or b hop =1, B SRS =3, N 2 =2, and N 3 =4, and wherein
the determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
determining, based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, N 1 , and N 2 or based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, b hop , B SRS , N 2 , and N 3 , the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein the index α(n SRS ) corresponding to the antenna port used to transmit the SRS for an n SRS th time is different from an index α(n SRS +Λ) corresponding to an antenna port used to transmit the SRS for an (n SRS +Λ) time.
5. A non-transitory computer readable medium, comprising a computer program which, when executed by one or more processors, causes the one or more processors to perform operation comprising:
receiving sounding reference signal (SRS) configuration information from a network device;
determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS, wherein n SRS is an integer greater than or equal to 0, Λ is a positive integer greater than or equal to 4, and a symbol * indicates a multiplication operation, wherein the SRS configuration information comprises one or both of b hop and B SRS , and the SRS bandwidth configuration parameter comprises one or more of N 1 , N 2 , and N 3 , wherein
each of b hop and B SRS is any value in {0, 1, 2, 3}, N 1 , N 2 , and N 3 are positive integers, N 1 indicates a quantity of second-level sub-bandwidths into which a first-level sub-bandwidth is divided, N 2 indicates a quantity of third-level sub-bandwidths into which a second-level sub-bandwidth is divided, and N 3 indicates a quantity of fourth-level sub-bandwidths into which a third-level sub-bandwidth is divided, wherein
a value of B SRS being 0 indicates that an SRS transmission sub-bandwidth is a first-level sub-bandwidth, a value of B SRS being 1 indicates that an SRS transmission sub-bandwidth is a second-level sub-bandwidth, a value of B SRS being 2 indicates that an SRS transmission sub-bandwidth is a third-level sub-bandwidth, or a value of B SRS S being 3 indicates that an SRS transmission sub-bandwidth is a fourth-level sub-bandwidth, wherein
a value of b hop , being 0 indicates that an SRS frequency hopping bandwidth is a first-level sub-bandwidth, a value of b hop , being 1 indicates that an SRS frequency hopping bandwidth is a second-level sub-bandwidth, a value of b hop being 2 indicates that an SRS frequency hopping bandwidth is a third-level sub-bandwidth, or a value of b hop being 3 indicates that an SRS frequency hopping bandwidth is a fourth-level sub-bandwidth, and wherein
the value of b hop , is less than or equal to the value of B SRS ; and
wherein the determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
when Π b′=b hop B SRS N b′ (N b hop =1) is an odd number, determining, based on n SRS and Λ, the index α(n SRS ) corresponding to the antenna port used to transmit the SRS; or
when Π b′=b hop B SRS N b′ (N b hop =1) is an even number, determining, based on at least one of n SRS ,
⌊
n
SRS
max
(
Λ
,
∏
b
′
=
b
hop
B
SRS
N
b
′
(
N
b
hop
=
1
)
)
⌋
,
and
⌊
n
SRS
Λ
⌋
,
the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein
max(Λ, Π b′=b hop B SRS N b′ (N b hop =1)) indicates a larger one of Λ and Π b′=b hop B SRS N b′ (N b hop =1), and a symbol └┘ indicates rounding down; and
wherein the index number α(n SRS ) of the antenna port used to transmit the SRS satisfies the following formulas:
a
(
n
SRS
)
=
{
(
n
SRS
+
α
·
⌊
n
SRS
/
max
(
Λ
,
K
)
⌋
+
β
·
⌊
n
SRS
/
Λ
⌋
)
mod
Λ
when
K
is
an
even
number
n
SRS
mod
Λ
when
K
is
an
odd
number
,
wherein
K=Π b′=b hop B SRS N b′ (N b hop =1) a, symbol mod indicates a modulo budget,
α
=
{
0
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
,
N
B
SRS
is
an
odd
number
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
6
}
1
others
,
and
β
=
{
1
when
{
B
SRS
=
b
hop
+
3
,
N
b
hop
+
1
=
N
b
hop
+
2
=
2
}
or
{
N
b
hop
+
1
=
2
,
N
B
SRS
=
4
}
0
others
;
selecting the antenna port with the index of α(n SRS ) from indexes corresponding to the Λ antenna ports; and
transmitting the SRS through the antenna port with the index of α(n SRS ) during an n SRS th SRS transmission.
6. The non-transitory computer readable medium according to claim 5 , wherein N 1 =N 2 =2, or b hop =1, B SRS =3, N 2 =2, and N 3 =4, and wherein
the determining, based on one or more of an SRS bandwidth configuration parameter, a sequence number n SRS of a quantity of SRS transmissions, a quantity Λ of antenna ports, and the received SRS configuration information, an index α(n SRS ) corresponding to an antenna port used to transmit an SRS comprises:
determining, based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, N 1 , and N 2 or based on the sequence number n SRS of the quantity of SRS transmissions, the quantity Λ of antenna ports, b hop , B SRS , N 2 , and N 3 , the index α(n SRS ) corresponding to the antenna port used to transmit the SRS, wherein the index α(n SRS ) corresponding to the antenna port used to transmit the SRS for an n SRS th time is different from an index α(n SRS +Λ) corresponding to an antenna port used to transmit the SRS for an (n SRS +Λ) th time.