Granted Patent B2

US 12,562,783 · App. 18/737,896 · Granted Feb 24, 2026

Inventor: Wei Huang (Dongguan, CN)

Assignee: VIVO MOBILE COMMUNICATION CO., LTD.

H04B7/04026H04B7/0639H04L1/0057

Abstract

Claims (228)

1 . A diversity transmission method, performed by a terminal, comprising:

determining a target codeword; and

performing diversity transmission based on the target codeword, wherein:

the target codeword meets a target encoding structure; the target codeword is an encoding matrix with N×N dimensions; N=2 k , and k is a positive integer;

the target encoding structure comprises a first basic element, a second basic element, a first generation element, and a second generation element;

the first generation element is an opposite number of a conjugate operation result of the first basic element, and the second generation element is a conjugate operation result of the second basic element; and

the first basic element, the second basic element, the first generation element, and the second generation element are complex numbers or block matrices,

wherein the determining a target codeword comprises:

receiving first indication information sent by a network-side device, wherein the first indication information is used to indicate the target codeword, and determining the target codeword based on the first indication information;

or

determining, by the terminal, the target codeword based on capability information or channel state information of the terminal.

2 . The diversity transmission method according to claim 1 , wherein the target encoding structure is represented by S; and

S

=

[

S

1

⁢

2

S

3

⁢

4

*

S

3

⁢

4

-

S

1

⁢

2

*

]

,

wherein elements in S comprise S 12 , S 34 , S 34 * , and −S 12 * ; S 12 is the first basic element, S 34 is the second basic element, S 34 * is the second generation element, and −S 12 is the first generation element; and S 12 , S 34 , S 34 * , and −S 12 * meet at least one of the following:

when N is equal to 2, S 12 , S 34 , S 34 * , and −S 12 * are all complex numbers, S 34 * is a conjugate complex number of S 34 , and −S 12 * is an opposite number of a conjugate complex number of S 12 ; or

when N is greater than 2, S 12 , S 34 , S 34 * , and −S 12 * are all block matrices with L×L dimensions, L=N/2, elements in each block matrix are all complex numbers, and 1<L<N, S 34 * is a conjugate matrix of S 34 , and −S 12 * is an opposite number of a conjugate matrix of S 12 .

3 . The diversity transmission method according to claim 2 , wherein when N is equal to 4, and

S

1

⁢

2

=

[

s

1

s

2

*

s

2

-

s

1

*

]

,

and

S

3

⁢

4

=

[

s

3

s

4

*

s

4

-

s

3

*

]

,

and

S

34

*

=

[

s

3

*

s

4

s

4

*

-

s

3

]

,

and

-

S

1

⁢

2

*

=

[

-

s

1

*

-

s

2

-

s

2

*

s

1

]

,

the target codeword is S 4 ; and

S

4

=

[

s

1

s

2

*

s

3

*

s

4

s

2

-

s

1

*

s

4

*

-

s

3

s

3

s

4

*

-

s

1

*

-

s

2

s

4

-

s

3

*

-

s

2

*

s

1

]

,

wherein elements in S 4 are all complex numbers, s 2 * is a conjugate complex number of s 2 , s 3 * is a conjugate complex number of s 3 , s 4 * is a conjugate complex number of s 4 , −s 1 * is an opposite number of a conjugate complex number of s 1 , −s 2 * is an opposite number of a conjugate complex number of s 2 , −s 3 * is an opposite number of a conjugate complex number of s 3 , −s 2 is an opposite number of s 2 , and −s 3 is an opposite number of s 3 .

4 . The diversity transmission method according to claim 1 , wherein the first indication information comprises at least one of the following:

a transmit diversity order and a codeword matrix indicator; or

codebook dimension indication information and a codeword matrix indicator.

5 . The diversity transmission method according to claim 1 , wherein a manner of carrying the first indication information comprises one of the following:

the first indication information is carried by Downlink Control Information (DCI);

the first indication information is carried by a preamble sequence;

the first indication information is carried by a signal sequence, wherein the signal sequence comprises a signal sequence scrambled by a Backscatter Communication User Equipment IDentity (BSC UE ID) or a random number related to BSC UE, or a signal sequence carrying a BSC UE ID; or

the first indication information is carried by a Media Access Control (MAC) Control Element (CE).

6 . The diversity transmission method according to claim 1 , wherein the method further comprises:

sending second indication information to a network-side device, wherein the second indication information is used to indicate the target codeword.

7 . The diversity transmission method according to claim 6 , wherein the second indication information comprises at least one of the following:

a transmit diversity order and a codeword matrix indicator; or

codebook dimension indication information and a codeword matrix indicator.

8 . The diversity transmission method according to claim 6 , wherein a manner of carrying the second indication information comprises one of the following:

the second indication information is carried by a Media Access Control (MAC) Control Element (CE);

the second indication information is carried by a preamble; or

the second indication information is carried by a sequence.

9 . The diversity transmission method according to claim 1 , wherein the determining a target codeword comprises:

when a first target condition is met, determining the target codeword.

10 . The diversity transmission method according to claim 9 , wherein the first target condition comprises at least one of the following:

energy of a back-transmitted signal of the terminal is lower than a first threshold;

the terminal is located at an edge of a cell;

the number of Negative ACKnowledgements (NACKs) sent by the terminal exceeds a second threshold; or

energy of a downlink received signal is lower than a third threshold.

11 . The diversity transmission method according to claim 1 , wherein the method further comprises:

when a first target condition is met, sending first trigger information to a network-side device, wherein the first trigger information is used to indicate to the network-side device that the terminal triggers diversity transmission.

12 . The diversity transmission method according to claim 11 , wherein a manner of carrying the first trigger information comprises one of the following:

the first trigger information is carried by a preamble sequence;

the first trigger information is carried by a signal sequence, wherein the signal sequence comprises a signal sequence scrambled by a Backscatter Communication User Equipment IDentity (BSC UE ID) or a random number related to BSC UE, or a signal sequence carrying a BSC UE ID; or

the first trigger information is carried by a Media Access Control (MAC) Control Element (CE).

13 . The diversity transmission method according to claim 1 , wherein the method further comprises:

receiving, by the terminal, second trigger information sent by a network-side device, wherein the second trigger information is used to trigger diversity transmission of the terminal.

14 . The diversity transmission method according to claim 13 , wherein a manner of carrying the second trigger information comprises one of the following:

the second trigger information is carried by Downlink Control Information (DCI);

the second trigger information is carried by a preamble sequence;

the second trigger information is carried by a signal sequence, wherein the signal sequence comprises a signal sequence scrambled by a Backscatter Communication User Equipment IDentity (BSC UE ID) or a random number related to BSC UE, or a signal sequence carrying a BSC UE ID; or

the second trigger information is carried by a Media Access Control (MAC) Control Element (CE).

15 . The diversity transmission method according to claim 1 , wherein the method further comprises:

receiving third indication information sent by a network-side device, wherein the third indication information is used to instruct the terminal to send measurement reference signals on M transmit antennas; and

sending the measurement reference signals on the M transmit antennas based on the third indication information.

16 . The diversity transmission method according to claim 15 , wherein the sending the measurement reference signals on the M transmit antennas based on the third indication information comprises:

separately sending the measurement reference signals on the M transmit antennas at different times based on the third indication information; or

separately sending the measurement reference signals on the M transmit antennas at a same time based on the third indication information, wherein measurement reference signals sent on different transmit antennas have been scrambled by random numbers related to index information of the corresponding antennas.

17 . The diversity transmission method according to claim 15 , wherein the third indication information comprises at least one of the following:

information used to indicate a time or cycle of a measurement reference signal sent by the terminal on each of the M transmit antennas;

information used to indicate a sequence of the measurement reference signal sent by the terminal on each of the M transmit antennas; or

information used to indicate a frequency, a bandwidth, or a frequency shift of the measurement reference signal sent by the terminal on each of the M transmit antennas.

18 . The diversity transmission method according to claim 15 , wherein a manner of carrying the third indication information comprises one of the following:

the third indication information is carried by Downlink Control Information (DCI);

the third indication information is carried by a preamble sequence;

the third indication information is carried by a signal sequence, wherein the signal sequence comprises a signal sequence scrambled by a Backscatter Communication User Equipment IDentity (BSC UE ID) or scrambled by a random number related to BSC UE, or a signal sequence carrying a BSC UE ID; or

the third indication information is carried by a Media Access Control (MAC) Control Element (CE).

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (15)