Method for obtaining configuration information of demodulation reference signal, configuration method, and apparatus

Patent metadata

Field	Value
Publication number	US-12199903-B2
Application number	US-202217709029-A
Country	US
Kind code	B2
Filing date	Mar 30, 2022
Priority date	Sep 30, 2019
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A method includes: receiving first signaling, wherein the first signaling comprises demodulation reference signal (DMRS) patterns configured for N time units, each DMRS pattern is used to indicate a quantity of DMRSs in each time unit, the quantity of DMRSs in each time unit is a total quantity of time domain symbols occupied by all DMRSs in the time unit, DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and N is a positive integer greater than 1; and receiving or sending data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit.

First claim

What is claimed is:

1. A method for obtaining configuration information of a demodulation reference signal (DMRS), comprising:
receiving, by a terminal device, first signaling from a network device, wherein the first signaling comprises DMRS patterns configured for N time units, wherein each respective DMRS pattern indicates a quantity of DMRSs in a respective time unit, wherein the quantity of DMRSs in the respective time unit is a total quantity of time domain symbols occupied by all DMRSs in the respective time unit, wherein DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and wherein N is a positive integer greater than 1; and
receiving or sending, by the terminal device, data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit of the N time units;
wherein in the DMRS patterns configured for the N time units and comprised in the first signaling, a quantity of DMRSs configured for the first k time units in the N time units and a quantity of DMRSs configured for the last m time units in the N time units are both greater than a quantity of DMRSs configured for time units other than the first k time units and the last m time units in the N time units, where k is a positive integer, 1≤k<N−m, and 1≤m<N−k.

2. The method according to claim 1 , wherein in the DMRS patterns that are configured for the N time units and that are comprised in the first signaling, each time unit in a first time unit set in the N time units is configured with a same quantity of DMRSs, the first time unit set comprises at least one time unit in the N time units, the at least one time unit is a time unit starting from the l 0 th time unit at an interval of L time units, l 0 is a positive integer, 1≤l 0 ≤N, and no DMRS has been configured for a time unit outside the first time unit set in the N time units or a quantity of configured DMRSs is less than the quantity of DMRSs configured for each time unit in the first time unit set.

3. The method according to claim 1 , wherein each respective DMRS pattern indicates a total quantity of DMRSs configured for a respective time unit, and the total quantity of DMRSs is a total quantity of front-loaded DMRSs and additional DMRSs:
wherein after receiving the first signaling, the method further comprises: determining, based on the DMRS patterns, the total quantity of DMRSs configured for each of the N time units.

4. The method according to claim 1 , wherein the first signaling is radio resource control (RRC) signaling.

5. The method according to claim 1 , wherein the first signaling is downlink control information (DCI) signaling, wherein the DCI signaling comprises a first index value, wherein the first index value corresponds to a respective value of N and a respective quantity of DMRSs per time unit; and
wherein after receiving the first signaling, the method further comprises: determining, based on the first index value, the quantity of DMRSs configured for each of the N time units.

6. A method for configuring a demodulation reference signal (DMRS), comprising:
sending, by a network device, first signaling to a terminal device, wherein the first signaling comprises DMRS patterns configured for N time units, wherein each respective DMRS pattern indicates a quantity of DMRSs in a respective time unit, wherein the quantity of DMRSs in the respective time unit is a total quantity of time domain symbols occupied by all DMRSs in the respective time unit, wherein DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and wherein N is a positive integer greater than 1; and
receiving or sending, by the network device, data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit of the N time units;
wherein in the DMRS patterns configured for the N time units and comprised in the first signaling, a quantity of DMRSs configured for the first k time units in the N time units and a quantity of DMRSs configured for the last m time units in the N time units are both greater than a quantity of DMRSs configured for time units other than the first k time units and the last m time units in the N time units, where k is a positive integer, 1≤k<N−m, and 1≤m<N−k.

7. The method according to claim 6 , wherein in the DMRS patterns that are configured for the N time units and that are comprised in the first signaling, each time unit in a first time unit set in the N time units is configured with a same quantity of DMRSs, the first time unit set comprises at least one time unit in the N time units, the at least one time unit is a time unit starting from the l 0 th time unit at an interval of L time units, l 0 is a positive integer, 1≤l 0 ≤N, and no DMRS has been configured for a time unit outside the first time unit set in the N time units or a quantity of configured DMRSs is less than the quantity of DMRSs configured for each time unit in the first time unit set.

8. The method according to claim 6 , wherein each respective DMRS pattern indicates a total quantity of DMRSs configured for a respective time unit, and the total quantity of DMRSs is a total quantity of front-loaded DMRSs and additional DMRSs.

9. The method according to claim 6 , wherein the first signaling is radio resource control (RRC) signaling.

10. The method according to claim 6 , wherein the first signaling is downlink control information (DCI) signaling, wherein the DCI signaling comprises a first index value, wherein the first index value corresponds to a respective value of N and a respective quantity of DMRSs per time unit.

11. An apparatus, comprising:
one or more memories configured to store instructions; and
one or more processors coupled to the one or more memories and configured to execute the instructions to facilitate the following being performed by the apparatus:
receiving first signaling from a network device, wherein the first signaling comprises demodulation reference signal (DMRS) patterns configured for N time units, wherein each respective DMRS pattern indicates a quantity of DMRSs in a respective time unit, wherein the quantity of DMRSs in the respective time unit is a total quantity of time domain symbols occupied by all DMRSs in the respective time unit, wherein DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and wherein N is a positive integer greater than 1; and
receiving or sending data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit of the N time units;
wherein in the DMRS patterns configured for the N time units and comprised in the first signaling, a quantity of DMRSs configured for the first k time units in the N time units and a quantity of DMRSs configured for the last m time units in the N time units are both greater than a quantity of DMRSs configured for time units other than the first k time units and the last m time units in the N time units, where k is a positive integer, 1≤k<N−m, and 1≤m<N−k.

12. The apparatus according to claim 11 , wherein the first signaling is radio resource control (RRC) signaling, and wherein in the DMRS patterns that are configured for the N time units and that are comprised in the first signaling, each time unit in a first time unit set in the N time units is configured with a same quantity of DMRSs, the first time unit set comprises at least one time unit in the N time units, the at least one time unit is a time unit starting from the l 0 th time unit at an interval of L time units, l 0

Assignees

• Huawei Tech Co Ltd

Inventors

• Yu Yawei
• Li Chaojun
• Guo Zhiheng
• Xie Xinqian

Classifications

• H04W72/04

  Wireless resource allocation · CPC title

• H04W72/0457

  Variable allocation of band or rate · CPC title

• H04W72/23

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

• H04L25/0224

  using sounding signals · CPC title

• H04L5/0082

  at predetermined intervals · CPC title