Sounding reference signal transmission method, terminal device, and computer-readable storage medium
This application provides sounding reference signal transmission methods and apparatuses. One method comprises: determining, by a terminal device, that a sounding reference signal (SRS) to be transmitted is an n SRS th transmission of a plurality of SRS transmissions, wherein n SRS is a non-negative integer; selecting, by a terminal device, an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ and n SRS , such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3; and sending, by the terminal device during the n SRS th transmission, the SRS through antenna ports comprised in the selected antenna group.
1. A method for sounding reference signal transmissions, comprising:
determining, by a terminal device, that a sounding reference signal (SRS) to be transmitted is n SRS th transmission of a plurality of SRS transmissions, wherein n SRS is a non-negative integer;
selecting, by a terminal device, an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ and n SRS , such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3, wherein the selected antenna group for transmitting the SRS for the n SRS th time has an index number α(n SRS ) determined based on:
a
(
n
SRS
)
=
(
n
SRS
+
α
⌊
n
SRS
/
Λ
⌋
+
β
⌊
n
SRS
/
K
⌋
)
mod
Λ
wherein
α
=
{
1
when
K
is
an
integer
multiple
of
Λ
0
otherwise
,
and
β
=
{
1
when
K
is
an
integer
multiple
of
Λ
2
0
otherwise
;
and
(n SRS +α└n SRS /Λ┘+β└n SRS /K┘)mod Λ represents a remainder obtained based on dividing (n SRS +α└n SRS /Λ┘+β└n SRS /K┘) by Λ, where K is a positive integer; and
sending, by the terminal device during the n SRS th transmission, the SRS through antenna ports comprised in the selected antenna group.
2. The method according to claim 1 , wherein the positive integer K is a quantity of SRS transmission sub-bandwidths comprised in a frequency hopping bandwidth for the SRS, and wherein the antenna group of the Λ antenna groups is further selected based on the K SRS transmission sub-bandwidths, such that an antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the (n SRS +(i−1)K) th time or the antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the (n SRS +(i+1)K) th time, wherein 1≤t≤(Λ−2).
3. The method according to claim 1 , wherein the antenna group is further selected such that the antenna group for sending the SRS for the n SRS th time is different from an antenna group for sending the SRS for the n SRS +Λ) th time.
4. The method according to claim 1 , wherein each of the Λ antenna groups comprises at least two different antenna ports, and the Λ antenna groups comprise all antenna ports of the terminal device.
5. A terminal device, comprising:
at least one processor; and
a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to:
determine, that a sounding reference signal (SRS) to be transmitted is an n SRS th transmission of a plurality of SRS transmissions, wherein n SRS is a non-negative integer;
select an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ n SRS , and such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3, wherein the selected antenna group for transmitting the SRS for the n SRS th time has an index number α(n SRS ) determined based on:
a
(
n
SRS
)
=
(
n
SRS
+
α
⌊
n
SRS
/
Λ
⌋
+
β
⌊
n
SRS
/
K
⌋
)
mod
Λ
wherein
α
=
{
1
when
K
is
an
integer
multiple
of
Λ
0
otherwise
,
and
β
=
{
1
when
K
is
an
integer
multiple
of
Λ
2
0
otherwise
;
and
(n SRS +α└n SRS /Λ┘+β└n SRS /K┘)mod Λ represents a remainder obtained based on dividing(n SRS +α└n SRS /Λ┘+β└n SRS /K┘)mod Λ, where K is a positive integer; and
send, during the n SRS th transmission, the SRS through antenna ports comprised in the selected antenna group.
6. The terminal device according to claim 5 , wherein the positive integer K is a quantity of SRS transmission sub-bandwidths comprised in a frequency hopping bandwidth for the SRS, and wherein the antenna group of the Λ antenna groups is further selected based on the K SRS transmission sub-bandwidths, such that an antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the (n SRS +(i−1)K) th time or the antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the time (n SRS +(i+1)K) th , wherein 1≤t≤(Λ−2).
7. The terminal device according to claim 5 , wherein the antenna group is further selected such that the antenna group for sending the SRS for the n SRS th time is different from an antenna group for sending the SRS for the (n SRS +Λ) th time.
8. The terminal device according to claim 5 , wherein each of the Λ antenna groups comprises at least two different antenna ports, and the Λ antenna groups comprise all antenna ports of the terminal device.
9. A non-transitory computer readable storage medium, comprising computer program codes which when executed by at least one processor to cause a terminal device to perform operations comprising:
determining, by a terminal device, that a sounding reference signal (SRS) to be transmitted is an n SRS th transmission of a plurality of SRS transmissions, wherein n SRS is a non-negative integer;
selecting, by a terminal device, an antenna group of Λ antenna groups to transmit the sounding reference signal (SRS) based on Λ and n SRS , such that when sending the SRS for 2Λ times, the SRS is sent through each of the Λ antenna groups at least once, wherein Λ is a positive integer greater than or equal to 3, wherein the selected antenna group for transmitting the SRS for the n SRS th time has an index number α(n SRS ) determined based on:
a
(
n
SRS
)
=
(
n
SRS
+
α
⌊
n
SRS
/
Λ
⌋
+
β
⌊
n
SRS
/
K
⌋
)
mod
Λ
wherein
α
=
{
1
when
K
is
an
integer
multiple
of
Λ
0
otherwise
,
and
β
=
{
1
when
K
is
an
integer
multiple
of
Λ
2
0
otherwise
;
and
(n SRS +α└n SRS /Λ┘+β└n SRS /K┘)mod Λ represents a remainder obtained based on dividing (n SRS +α└n SRS /Λ┘+β└n SRS /K┘) by Λ by A, where K is a positive integer; and
sending, by the terminal device during the n SRS th transmission, the SRS through antenna ports comprised in the selected antenna group.
10. The non-transitory computer readable storage medium according to claim 9 , wherein the positive integer K is a quantity of SRS transmission sub-bandwidths comprised in a frequency hopping bandwidth for the SRS, and wherein the antenna group of the Λ antenna groups is further selected based on the K SRS transmission sub-bandwidths, such that an antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the (n SRS +(i−1)K) th time or the antenna group for sending the SRS for the (n SRS +iK) th time is different from an antenna group for sending the SRS for the (n SRS +(i+1)K) th time, wherein 1≤i≤(Λ−2).
11. The non-transitory computer readable storage medium according to claim 9 , wherein the antenna group is further selected such that the antenna group for sending the SRS for the n SRS th time is different from an antenna group for sending the SRS for (n SRS +Λ) th time.
12. The non-transitory computer readable storage medium according to claim 9 , wherein each of the Λ antenna groups comprises at least two different antenna ports, and the Λ antenna groups comprise all antenna ports of the terminal device.