Data transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11101964-B2
Application number	US-201916579409-A
Country	US
Kind code	B2
Filing date	Sep 23, 2019
Priority date	Mar 24, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A data transmission method, including receiving, by a terminal device in a downlink control part, first downlink control information and a first downlink reference signal that are sent by a network device, receiving, by the terminal device in a first downlink data part according to the first downlink control information, first data sent by the network device, generating, by the terminal device, feedback information based on the first downlink reference signal and the first data, sending, by the terminal device, the feedback information to the network device in an uplink feedback part, and receiving, by the terminal device in a second downlink data part according to the first downlink control information, second data sent by the network device, where the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit.

First claim

What is claimed is:

1. A data transmission method in a time division duplex system, comprising:
receiving, by a terminal device in a downlink control part, first downlink control information and a first downlink reference signal that are sent by a network device;
receiving, by the terminal device, in a first downlink data part, according to the first downlink control information, first data sent by the network device;
generating, by the terminal device, feedback information according to the first downlink reference signal and the first data;
sending, by the terminal device, in an uplink feedback part, the feedback information to the network device; and
receiving, by the terminal device in a second downlink data part, according to the first downlink control information, second data sent by the network device, wherein the first downlink control information is sent by the network device before the terminal device sends the feedback information, and wherein the second data is sent by the network device after the terminal device sends the feedback information;
wherein the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; and
wherein, in terms of timing, the first time unit sequentially comprises the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part.

2. The method according to claim 1 , wherein the first data is different from the second data.

3. The method according to claim 1 , wherein the first data and the second data constitute a first transport block.

4. The method according to claim 1 , wherein the first time unit comprises one subframe.

5. The method according to claim 1 , wherein the method further comprises:
receiving, by the terminal device, uplink feedback part configuration information from the network device, wherein the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.

6. The method according to claim 1 , wherein the first time unit comprises M OFDM symbols, wherein M is a positive integer; and
wherein the uplink feedback part comprises an N th OFDM symbol in the first time unit, wherein, when N is an even number, N is determined according to at least one of N=M/2 or N=M/2+1, and wherein, when N is an odd number, N=(M+1)/2.

7. The method according to claim 1 , wherein the sending the feedback information to the network device is performed before the receiving the second data sent by the network device.

8. An apparatus in a time division duplex system, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
receive, in a downlink control part, first downlink control information and a first downlink reference signal that are sent by a network device;
receive, in a first downlink data part, according to the first downlink control information, first data sent by the network device;
generate feedback information according to the first downlink reference signal and the first data;
send the feedback information to the network device in an uplink feedback part; and
receive, in a second downlink data part, according to the first downlink control information, second data sent by the network device, wherein the first downlink control information is sent by the network device before the apparatus sends the feedback information, and wherein the second data is sent by the network device after the apparatus sends the feedback information;

wherein the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; and
wherein, in terms of timing, the first time unit sequentially comprises the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part.

9. The apparatus according to claim 8 , wherein the first data is different from the second data.

10. The apparatus according to claim 8 , wherein the first data and the second data constitute a first transport block.

11. The apparatus according to claim 8 , wherein the first time unit comprises one subframe.

12. The apparatus according to claim 8 , wherein the program further includes instructions to:
receive uplink feedback part configuration information from the network device, wherein the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.

13. The apparatus according to claim 8 , wherein the first time unit comprises M OFDM symbols, wherein M is a positive integer; and
wherein the uplink feedback part comprises an N th OFDM symbol in the first time unit, wherein, when N is an even number, N is determined according to at least one of N=M/2 or N=M/2+1, and wherein, when N is an odd number, N=(M+1)/2.

14. An apparatus in a time division duplex system, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
send, in a downlink control part, first downlink control information and a first downlink reference signal to a terminal device;
send, in a first downlink data part, according to the first downlink control information, first data to the terminal device;
receive, in an uplink feedback part, feedback information sent by the terminal device; and
send, in a second downlink data part, according to the first downlink control information, second data to the terminal device, wherein the first downlink control information is sent by the apparatus before the terminal device sends the feedback information, and wherein the second data is sent by the apparatus after the terminal device sends the feedback information;

wherein the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part constitute a first time unit; and
wherein, in terms of timing, the first time unit sequentially comprises the downlink control part, the first downlink data part, the uplink feedback part, and the second downlink data part.

15. The apparatus according to claim 14 , wherein the first data is different from the second data.

16. The apparatus according to claim 14 , wherein the first data and the second data constitute a first transport block.

17. The apparatus according to claim 14 , wherein the first time unit comprises one subframe.

18. The apparatus according to claim 14 , wherein the program further includes instructions to:
send uplink feedback part configuration information to the terminal device, wherein the uplink feedback part configuration information indicates a time-frequency resource location of the uplink feedback part.

19. The apparatus according to claim 14 , wherein the first time unit comprises M OFDM symbols, wherein M is a positive integer; and
wherein the uplink feedback part comprises an N th OFDM symbol in the first time unit, wherein, when N is an even number, N is determined according to at least one of N=M/2 or N=M/2+1, and wherein, when N is an odd number, N=(M+1)/2.

20. The apparatus according to claim 14 , wherein the program further includes instructions to:
determine, according to the feedback information, whether to retransmit the first data and the second data in a time unit following the first time unit.

Assignees

• Huawei Tech Co Ltd

Inventors

• Lyu Yongxia
• Ma Ruixiang

Classifications

• H04W88/02

  Terminal devices · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L1/1887

  Scheduling and prioritising arrangements · CPC title

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title