Data Transmission Method, Apparatus, And System

Patent metadata

Field	Value
Publication number	US-2022158779-A1
Application number	US-202217588987-A
Country	US
Kind code	A1
Filing date	Jan 31, 2022
Priority date	Jul 31, 2019
Publication date	May 19, 2022
Grant date	—

Abstract

The present disclosure discloses example data transmission methods and apparatuses. One example method includes determining first downlink control information (DCI) by a network device. The first DCI is sent to n terminal devices by the network device, where the first DCI includes information for the n terminal devices to perform data transmission, and n is an integer greater than or equal to 2.

First claim

What is claimed is:

1 . A data transmission method, comprising:
determining, by a network device, first downlink control information; and sending, by the network device, the first downlink control information to n terminal devices, wherein the first downlink control information indicates the n terminal devices to perform data transmission, and n is an integer greater than or equal to 2.

2 . The method according to claim 1 , wherein:
the first downlink control information comprises demodulation reference signal (DMRS) antenna port indication information, and the DMRS antenna port indication information indicates a first sequence value corresponding to the n terminal devices.

3 . The method according to claim 1 , wherein the method further comprises:
sending, by the network device, first information to the n terminal devices, wherein the first information comprises a first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port.

4 . The method according to claim 1 , wherein the method further comprises:
sending, by the network device, second information to the n terminal devices, wherein the second information comprises a value of n and a total quantity of layers of data on which the n terminal devices perform parallel transmission, the second information is used by the n terminal devices to determine a first correspondence table based on a predefined first relationship table set, the predefined first relationship table set comprises at least one first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port.

5 . The method according to claim 3 , wherein the method further comprises:
sending, by the network device, first indication information to the n terminal devices, wherein the first indication information indicates a second sequence value corresponding to each of the n terminal devices.

6 . A data transmission method, comprising:
receiving, by a terminal device, first downlink control information from a network device, wherein the first downlink control information indicates n terminal devices to perform data transmission, n is an integer greater than or equal to 2, and the terminal device is one of the n terminal devices; and performing, by the terminal device, data transmission with the network device based on the first downlink control information.

7 . The method according to claim 6 , wherein:
the first downlink control information comprises demodulation reference signal (DMRS) antenna port indication information, and the DMRS antenna port indication information indicates a first sequence value corresponding to the n terminal devices.

8 . The method according to claim 6 , wherein the method further comprises:
receiving, by the terminal device, first information from the network device, wherein the first information comprises a first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port.

9 . The method according to claim 6 , wherein the method further comprises:
receiving, by the terminal device, second information from the network device, wherein the second information comprises a value of n and a total quantity of layers of data on which the n terminal devices perform parallel transmission; and determining, by the terminal device, a first correspondence table in a predefined first relationship table set based on the second information.

10 . The method according to claim 8 , wherein the method further comprises:
receiving, by the terminal device, first indication information from the network device, wherein the first indication information indicates a second sequence value corresponding to each of the n terminal devices; and determining, by the terminal device in the first correspondence table based on the first sequence value and the second sequence value, a DMRS antenna port corresponding to the terminal device.

11 . A data transmission apparatus, comprising:
one or more processors; and a non-transitory computer readable memory, storing computer-executable instructions that, when executed by the one or more processors, cause the data transmission apparatus to perform operations comprising:
determining first downlink control information; and
sending the first downlink control information to n terminal devices, wherein the first downlink control information indicates the n terminal devices to perform data transmission, and n is an integer greater than or equal to 2.

12 . The apparatus according to claim 11 , wherein:
the first downlink control information comprises demodulation reference signal (DMRS) antenna port indication information, and the DMRS antenna port indication information indicates a first sequence value corresponding to the n terminal devices.

13 . The apparatus according to claim 11 , wherein the operations further comprise:
sending first information to the n terminal devices, wherein the first information comprises a first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port.

14 . The apparatus according to claim 11 , wherein the operations further comprise:
sending second information to the n terminal devices, wherein the second information comprises a value of n and a total quantity of layers of data on which the n terminal devices perform parallel transmission, the second information is used by the n terminal devices to determine a first correspondence table based on a predefined first relationship table set, the predefined first relationship table set comprises at least one first correspondence table, and the first correspondence table comprises a correspondence between at least one first sequence value, at least one second sequence value, and a DMRS antenna port.

15 . The apparatus according to claim 13 , wherein the operations further comprise:
sending first indication information to the n terminal devices, wherein the first indication information indicates a second sequence value corresponding to each of the n terminal devices.

16 . A data transmission apparatus, comprising:
one or more processors; and a non-transitory computer readable memory storing computer-executable instructions that, when executed by the one or more processors, cause the data transmission apparatus to perform operations comprising:
receiving first downlink control information from a network device, wherein the first downlink control information comprises information for n terminal devices to perform data transmission, n is an integer greater than or equal to 2, and the data transmission apparatus is one of the n terminal devices; and
performing data transmission with the network device based on the first downlink control information.

17 . The apparatus according to claim 16 , wherein:
the first downlink control information comprises demodulation reference signal (DMRS) antenna port indication information, and the DMRS antenna port indication information indicates a first sequence value corresponding to the n terminal devices.

18 . The apparatus according to claim 16 , wherein the operations further comprise:
receiving first information from the network device

Assignees

• Huawei Tech Co Ltd

Inventors

• Yu Yawei
• Li Chaojun

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04B7/0452 Primary

  Multi-user MIMO systems · CPC title