Data transmission method and apparatus

• US 10,097,248 B2
• Filed: 06/28/2016
• Issued: 10/09/2018
• Est. Priority Date: 12/30/2013
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wu, Ye
• Primary Examiner(s): CATTUNGAL, AJAY P
• Application Number:
  US15/194,651
• Publication Number:
  US 20160308592A1
• Time in Patent Office: 833 Days
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

Disclosed are a data transmission method and apparatus. The method includes encoding a data stream of a first receive end by using a first encoding mode, to obtain a first encoded data stream. The method also includes encoding a data stream of a second receive end by using a second encoding mode, to obtain a second encoded data stream. The method also includes encoding the first encoded data stream and the second encoded data stream by using a third encoding mode, to obtain a to-be-sent data stream. The method also includes sending the to-be-sent data stream to a corresponding receive end by using antennas.

Claims

1. A method, comprising:

encoding a data stream of a first receive end using a first encoding mode, to obtain a first encoded data stream, wherein the first encoding mode corresponds to a Multiple Input Multiple Output (MIMO) transmission mode used by the first receive end, wherein the first encoding mode is a first MIMO precoding mode;

encoding a data stream of a second receive end using a second encoding mode, to obtain a second encoded data stream, wherein the second encoding mode corresponds to a MIMO transmission mode used by the second receive end, wherein the second encoding mode is a second MIMO precoding mode;

encoding the first encoded data stream and the second encoded data stream using a third encoding mode, to obtain a to-be-sent data stream; and

sending the to-be-sent data stream to a corresponding receive end using a plurality of antennas.

2. The method according to claim 1, wherein the first receive end and the second receive end use a same MIMO transmission mode, or the first receive end and the second receive end use different MIMO transmission modes.

3. The method according to claim 1, further comprising:

determining a first channel matrix that is from a transmit end to the first receive end, and a second channel matrix that is from the transmit end to the second receive end.

4. The method according to claim 3, wherein encoding the first encoded data stream and the second encoded data stream using the third encoding mode further comprises:

multiplying the first encoded data stream by a first precode to obtain a first to-be-sent data stream, and multiplying the second encoded data stream by a second precode to obtain a second to-be-sent data stream, wherein the first precode and the second precode are determined by the third encoding mode, and the to-be-sent data stream is a sum of the first to-be-sent data stream and the second to-be-sent data stream.

5. The method according to claim 4, wherein:

a product of the first precode and the first channel matrix is greater than a first threshold, and a product of the first precode and the second channel matrix is less than or equal to the first threshold; and

a product of the second precode and the second channel matrix is greater than a second threshold, and a product of the second precode and the first channel matrix is less than or equal to the second threshold.

6. The method according to claim 4, wherein:

the first encoding mode is a closed-loop precoding mode, and encoding the data stream of a first receive end using the first encoding mode further comprises;

determining that the product of the first channel matrix and the first precode is a first equivalent channel matrix; and

determining the first encoded data stream according to the first encoding mode and the first equivalent channel matrix;

or

the second encoding mode is a closed-loop precoding mode, and encoding the data stream of the second receive end using the second encoding mode further comprises;

determining that the product of the second channel matrix and the second precode is a second equivalent channel matrix; and

determining the second encoded data stream according to the second encoding mode and the second equivalent channel matrix.

7. The method according to claim 1, wherein the MIMO transmission mode used by the first receive end and the MIMO transmission mode used by the second receive end each comprise one or more of the following:

a single user (SU) diversity transmission mode and a single-user beamforming (SU-beamforming) transmission mode; and

wherein the SU diversity transmission mode comprises one or more of the following;

a space frequency block coding (SFBC) transmission mode, a space time block coding (STBC) transmission mode, and a cyclic delay diversity (CDD) transmission mode.

8. An apparatus, comprising:

a user encoding module, configured to;

encode a data stream of a first receive end using a first encoding mode, to obtain a first encoded data stream, wherein the first encoding mode corresponds to a Multiple Input Multiple Output (MIMO) transmission mode used by the first receive end, wherein the first encoding mode is a first MIMO precoding mode; and

encode a data stream of a second receive end using a second encoding mode, to obtain a second encoded data stream, wherein the second encoding mode corresponds to a MIMO transmission mode used by the second receive end, wherein the second encoding mode is a second MIMO precoding mode;

a precoding module, configured to encode the first encoded data stream and the second encoded data stream using a third encoding mode, to obtain a to-be-sent data stream; and

a transmission module, configured to send the to-be-sent data stream to a corresponding receive end using a plurality of antennas.

9. The apparatus according to claim 8, wherein the first receive end and the second receive end use a same MIMO transmission mode, or the first receive end and the second receive end use different MIMO transmission modes.

10. The apparatus according to claim 8, further comprising:

a channel matrix determining module, configured to determine a first channel matrix that is from a transmit end to the first receive end, and a second channel matrix that is from the transmit end to the second receive end.

11. The apparatus according to claim 10, wherein the precoding module is further configured to:

multiply the first encoded data stream by a first precode to obtain a first to-be-sent data stream, and multiply the second encoded data stream by a second precode to obtain a second to-be-sent data stream, wherein the first precode and the second precode are determined by the third encoding mode, and the to-be-sent data stream is a sum of the first to-be-sent data stream and the second to-be-sent data stream.

12. The apparatus according to claim 11, wherein:

a product of the first precode and the first channel matrix is greater than a first threshold, and a product of the first precode and the second channel matrix is less than or equal to the first threshold; and

a product of the second precode and the second channel matrix is greater than a second threshold, and a product of the second precode and the first channel matrix is less than or equal to the second threshold.

13. The apparatus according to claim 11, wherein:

the first encoding mode is a closed-loop precoding mode, and encoding the data stream of the first receive end using the first encoding mode, to obtain the first encoded data stream further comprises;

determining that the product of the first channel matrix and the first precode is a first equivalent channel matrix; and

determining the first encoded data stream according to the first encoding mode and the first equivalent channel matrix;

or

the second encoding mode is a closed-loop precoding mode, and encoding the data stream of the second receive end using the second encoding mode further comprises;

determining that the product of the second channel matrix and the second precode is a second equivalent channel matrix; and

determining the second encoded data stream according to the second encoding mode and the second equivalent channel matrix.

14. The apparatus according to claim 8, wherein the MIMO transmission mode used by the first receive end and the MIMO transmission mode used by the second receive end each comprise one or more of the following:

a single user (SU) diversity transmission mode, a single-user beamforming (SU-beamforming) transmission mode, and a multi-user multiple-input multiple-output (MU-MIMO) transmission mode; and

wherein the SU diversity transmission mode comprises one or more of the following;

a space frequency block coding (SFBC) transmission mode, a space time block coding (STBC) transmission mode, and a cyclic delay diversity (CDD) transmission mode.

15. An apparatus, comprising:

a plurality of antennas;

a processor, and

a non-transitory processor-readable medium having processor-executable instructions stored thereon that, when executed by the processor, cause the processor to;

encode a data stream of a first receive end using a first encoding mode, to obtain a first encoded data stream, wherein the first encoding mode corresponds to a Multiple Input Multiple Output (MIMO) transmission mode used by the first receive end, wherein the first encoding mode is a first MIMO precoding mode;

encode a data stream of a second receive end using a second encoding mode, to obtain a second encoded data stream, wherein the second encoding mode corresponds to a MIMO transmission mode used by the second receive end, wherein the second encoding mode is a second MIMO precoding mode;

encode the first encoded data stream and the second encoded data stream using a third encoding mode, to obtain a to-be-sent data stream; and

a transmitter, configured to send the to-be-sent data stream to a corresponding receive end using the plurality of antennas.

16. The apparatus according to claim 15, wherein the first receive end and the second receive end use a same MIMO transmission mode, or the first receive end and the second receive end use different MIMO transmission modes.

17. The apparatus according to claim 15, wherein the instructions further cause the processor to determine a first channel matrix that is from a transmit end to the first receive end, and a second channel matrix that is from the transmit end to the second receive end.

18. The apparatus according to claim 17, wherein the instructions further cause the processor to multiply the first encoded data stream by a first precode to obtain a first to-be-sent data stream, and multiply the second encoded data stream by a second precode to obtain a second to-be-sent data stream, wherein the first precode and the second precode are determined by the third encoding mode, and the to-be-sent data stream is a sum of the first to-be-sent data stream and the second to-be-sent data stream.

19. The apparatus according to claim 18, wherein:

a product of the first precode and the first channel matrix is greater than a first threshold, and a product of the first precode and the second channel matrix is less than or equal to the first threshold; and

a product of the second precode and the second channel matrix is greater than a second threshold, and a product of the second precode and the first channel matrix is less than or equal to the second threshold.

20. The apparatus according to claim 18, wherein:

the first encoding mode is a closed-loop precoding mode, and the instructions further cause the processor to;

determine that the product of the first channel matrix and the first precode is a first equivalent channel matrix; and

determine the first encoded data stream according to the first encoding mode and the first equivalent channel matrix;

or

the second encoding mode is a closed-loop precoding mode, and the instructions further cause the processor to;

determine that the product of the second channel matrix and the second precode is a second equivalent channel matrix; and

determine the second encoded data stream according to the second encoding mode and the second equivalent channel matrix.