Transmission scheme indication method, and data transmission method, apparatus, and system

• US 10,735,080 B2
• Filed: 02/08/2019
• Issued: 08/04/2020
• Est. Priority Date: 08/10/2016
• 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, Liu, Yong, Bi, Xiaoyan
• Primary Examiner(s): Corrielus, Jean B
• Application Number:
  US16/271,367
• Publication Number:
  US 20190173559A1
• Time in Patent Office: 543 Days
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

This disclosure includes a transmission scheme indication method, and a data transmission method, apparatus, and system, pertaining to the field of communications technologies. The transmission scheme indication method includes: generating transmission scheme indication information, where the transmission scheme indication information is used to indicate one of at least two transmission schemes included in a current transmission mode, and the at least two transmission schemes include a beamforming transmit diversity transmission scheme; and sending the transmission scheme indication information. This application resolves a problem of relatively low flexibility in UE data transmission, and improves flexibility in UE data transmission. This application is used for data transmission.

Claims

1. A method, comprising:

determining, based on channel quality information, a selected transmission scheme from at least two transmission schemes of a current transmission mode, the at least two transmission schemes comprising a beamforming transmit diversity transmission scheme and a unified transmit diversity scheme indicating two sub-schemes, the two sub-schemes comprising the beamforming transmit diversity transmission scheme and an open-loop transmit diversity transmission scheme;

generating transmission scheme indication information indicating the selected transmission scheme; and

sending the transmission scheme indication information.

2. The method according to claim 1, wherein the at least two transmission schemes further comprise an open-loop spatial multiplexing transmission scheme.

3. The method according to claim 1, wherein the at least two transmission schemes further comprise a closed-loop spatial multiplexing transmission scheme.

4. The method according to claim 1, wherein the at least two transmission schemes further comprise a multi-user multiple-input and multiple-output transmission scheme.

5. The method according to claim 1, wherein:

generating the transmission scheme indication information comprises generating downlink control information, wherein a format of the downlink control information corresponds to the selected transmission scheme; and

sending the transmission scheme indication information comprises sending the downlink control information.

6. The method according to claim 1, wherein determining the selected transmission scheme comprises:

determining, as the selected transmission scheme, a first transmission scheme of the at least two transmission schemes when a channel quality information meets a first threshold;

determining, as the selected transmission scheme, a second transmission scheme of the at least two transmission schemes when the channel quality information fails the first threshold and meets second threshold;

or

determining, as the selected transmission scheme, a third transmission scheme of the at least two transmission schemes when the channel quality information fails the second threshold.

7. A method, comprising:

receiving transmission scheme indication information indicating a first transmission scheme of at least two transmission schemes of a current transmission mode, the at least two transmission schemes comprising a beamforming transmit diversity transmission scheme and a unified transmit diversity scheme indicating two sub-schemes, the two sub-schemes comprising the beamforming transmit diversity transmission scheme and an open-loop transmit diversity transmission scheme, and the first transmission scheme having been determined based on channel quality information; and

transmitting data according to the first transmission scheme.

8. The method according to claim 7, wherein the at least two transmission schemes further comprise an open-loop spatial multiplexing transmission scheme.

9. The method according to claim 7, wherein the at least two transmission schemes further comprise a closed-loop spatial multiplexing transmission scheme.

10. The method according to claim 7, wherein the at least two transmission schemes further comprise a multi-user multiple-input and multiple-output transmission scheme.

11. The method according to claim 7, wherein:

receiving the transmission scheme indication information comprises;

receiving downlink control information, wherein a format of the downlink control information corresponds to the first transmission scheme;

determining, from the at least two transmission schemes of the current transmission mode, a corresponding transmission scheme corresponding to the format of the downlink control information; and

determining the corresponding transmission scheme as the first transmission scheme.

12. A base station, comprising:

a non-transitory memory storage comprising instructions; and

a processor in communication with the non-transitory memory storage, wherein the processor executes the instructions to configure the base station to;

determine, based on channel quality information, a selected transmission scheme from at least two transmission schemes of a current transmission mode, the at least two transmission schemes comprising a beamforming transmit diversity transmission scheme and a unified transmit diversity scheme indicating two sub-schemes, the two sub-schemes comprising the beamforming transmit diversity transmission scheme and an open-loop transmit diversity transmission scheme;

generate transmission scheme indication information indicating the selected transmission scheme; and

send the transmission scheme indication information.

13. The base station according to claim 12, wherein the at least two transmission schemes further comprise an open-loop spatial multiplexing transmission scheme.

14. The base station according to claim 12, wherein the at least two transmission schemes further comprise a closed-loop spatial multiplexing transmission scheme.

15. The base station according to claim 12, wherein the at least two transmission schemes further comprise a multi-user multiple-input and multiple-output transmission scheme.

16. The base station according to claim 12, wherein the processor executes further instructions to further configure the base station to:

generate downlink control information, wherein a format of the downlink control information corresponds to the selected transmission scheme; and

send the downlink control information.