Data Transmission Method and Apparatus

• US 20200015233A1
• Filed: 09/20/2019
• Published: 01/09/2020
• Est. Priority Date: 03/24/2017
• 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: Lyu, Yongxia, Ma, Ruixiang
• Granted Patent: US 11,140,684 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0005 applied to payload information
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0032 Without explicit signalling
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

This application provides a data transmission method and apparatus. The method includes coding, by a terminal device, a first transport block to obtain a first coded transport block, where the first transport block includes first data; coding, by the terminal device, indication information to obtain coded indication information, where the indication information is used to indicate whether the terminal device sends a first buffer status report BSR when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and sending, by the terminal device, the first coded transport block and the coded indication information to a network device. According to the data transmission method and apparatus provided in embodiments of this application, the network device can directly learn whether the terminal device sends a BSR, so as to reduce a communication delay.

Claims

1. A data transmission method, comprising:

coding, by a terminal device, a first transport block to obtain a first coded transport block, the first transport block comprising first data;

coding, by the terminal device, indication information to obtain coded indication information, the coded indication information being used to indicate whether the terminal device sends a first buffer status report (BSR) when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and

sending, by the terminal device, the first coded transport block and the coded indication information to a network device.

2. The method according to claim 1, wherein before the coding, by the terminal device, the first transport block to obtain the first coded transport block, the method further comprises:

processing, by the terminal device, a second transport block to obtain a second coded transport block, the second transport block comprising the first data and a second BSR, and the second BSR indicates a data amount of to-be-transmitted data in the buffer when the terminal device sends the second coded transport block; and

sending, by the terminal device, the second coded transport block to the network device.

3. The method according to claim 2, wherein the coded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data and that the second BSR is updated with the first BSR.

4. The method according to claim 1, wherein the coded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data, and the method further comprises:

coding, by the terminal device, a third transport block to obtain a third coded transport block, the third transport block comprising the first BSR; and

sending, by the terminal device, the third coded transport block to the network device.

5. The method according to claim 4, wherein the first transport block and the third transport block are coded by using different modulation and coding schemes.

6. The method according to claim 4, wherein the sending, by the terminal device, the first coded transport block and the coded indication information to the network device comprises:

sending, by the terminal device, the first coded transport block and the coded indication information to the network device on a time-frequency resource pre-allocated by the network device.

7. The method according to claim 1, wherein the first transport block further comprises the first BSR.

8. A data transmission method, comprising:

receiving, by a network device, a first coded transport block and coded indication information that are sent by a terminal device, the first coded transport block comprising first data;

decoding, by the network device, the coded indication information to obtain decoded indication information, the decoded indication information being used to indicate whether the terminal device sends a first buffer status report (BSR) when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and

processing, by the network device, the first coded transport block based on the decoded indication information.

9. The method according to claim 8, wherein before the receiving, by the network device, the first coded transport block and coded indication information that are sent by the terminal device, the method further comprises:

receiving, by the network device, a second coded transport block sent by the terminal device, the second coded transport block comprising the first data and a second BSR, and the second BSR indicates a data amount of to-be-transmitted data in the buffer when the terminal device sends the second coded transport block.

10. The method according to claim 9, wherein the decoded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data and that the second BSR is updated with the first BSR, and the method further comprises:

updating, by the network device, the second BSR with the first BSR.

11. The method according to claim 8, wherein the decoded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data, and the method further comprises:

receiving, by the network device, a third coded transport block sent by the terminal device; and

decoding, by the network device, the third coded transport block to obtain the first BSR.

12. The method according to claim 9, wherein the decoded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data, and the processing, by the network device, the first coded transport block based on the decoded indication information comprises:

separately decoding, by the network device, the first coded transport block and the second coded transport block based on the decoded indication information.

13. The method according to claim 9, wherein the decoded indication information is used to indicate that the terminal device does not send the first BSR when the terminal device sends the first data, and the processing, by the network device, the first coded transport block based on the decoded indication information comprises:

jointly decoding, by the network device, the first coded transport block and the second coded transport block based on the decoded indication information.

14. A terminal device, comprising:

a processing unit, configured to;

code a first transport block to obtain a first coded transport block, wherein the first transport block comprises first data;

code indication information to obtain coded indication information, wherein the coded indication information is used to indicate whether the terminal device sends a first buffer status report (BSR) when the terminal device sends the first data, and the first BSR indicates a data amount of to-be-transmitted data currently buffered in a buffer of the terminal device; and

a communications unit, configured to send the first coded transport block and the coded indication information that are obtained by the processing unit to a network device.

15. The terminal device according to claim 14, wherein the processing unit is further configured to:

before coding the first transport block to obtain the first coded transport block, process a second transport block to obtain a second coded transport block, wherein the second transport block comprises the first data and a second BSR, and the second BSR indicates a data amount of to-be-transmitted data in the buffer when the terminal device sends the second coded transport block; and

send the second coded transport block to the network device.

16. The terminal device according to claim 15, wherein the coded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data and that the second BSR is updated with the first BSR.

17. The terminal device according to claim 14, wherein the coded indication information is used to indicate that the terminal device sends the first BSR when the terminal device sends the first data;

the processing unit is further configured to code a third transport block to obtain a third coded transport block, wherein the third transport block comprises the first BSR; and

the communications unit is further configured to send the third coded transport block to the network device.

18. The terminal device according to claim 17, wherein the first transport block and the third transport block are coded by using different modulation and coding schemes.

19. The terminal device according to claim 17, wherein the communications unit is configured to send the first coded transport block and the coded indication information to the network device on a time-frequency resource pre-allocated by the network device.

20. The terminal device according to claim 14, wherein the first transport block further comprises the first BSR.