Communication method, terminal, and network device for determining a beam for an uplink channel

Patent metadata

Field	Value
Publication number	US-11139945-B2
Application number	US-201916714165-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	Jun 16, 2017
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

This application provides a communication method, a terminal, and a network device. The method includes: receiving, by a terminal, indication information from a network device, where the indication information includes an identifier of at least one reference signal; and determining, by the terminal, that there is a correspondence between a resource used to send a first channel and a first reference signal of the at least one reference signal, where the first channel is a channel to be transmitted by the terminal, and there is a spatial quasi co-location (QCL) relationship between a port of the first channel and a port of the first reference signal, or there is a spatial QCL relationship between a port of a demodulation reference signal of the first channel and a port of the first reference signal.

First claim

What is claimed is:

1. A communication method, comprising:
receiving, by a terminal, indication information from a network device, wherein the indication information comprises an identifier of at least one reference signal; and
determining, by the terminal, that there is a correspondence between a resource used to send a signal on a first channel and a first reference signal of the at least one reference signal, wherein the first channel is a channel on which the signal is to be transmitted by the terminal, and wherein:
a spatial filter used to transmit the signal on the first channel is the same as a spatial filter used to transmit the first reference signal,
or
a spatial filter used to transmit a demodulation reference signal of the first channel is the same as a spatial filter used to transmit the first reference signal,
wherein the determining, by the terminal, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises determining, by the terminal, based on a correspondence between the first reference signal and a first cell identifier that is received by the terminal and a correspondence between the first cell identifier and the resource used to send the signal on the first channel.

2. The method according to claim 1 , wherein the determining, by the terminal, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises:
determining, by the terminal based on a correspondence between the first reference signal and a time-frequency resource used to transmit a second signal on a second channel and a correspondence between the resource used to transmit the second signal on the second channel and the resource used to send the signal on the first channel, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal, wherein the second channel is a channel used to transmit downlink control information.

3. The method according to claim 1 , wherein the determining, by the terminal, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises:
determining, by the terminal based on a correspondence between the first reference signal and a reporting configuration of a reference signal used to measure channel state information, and the resource that is of the first channel and that is configured in the reporting configuration of the reference signal used to measure the channel state information, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

4. The method according to claim 1 , wherein the determining, by the terminal, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises:
determining, by the terminal based on a correspondence between the first reference signal and an uplink control information type and a correspondence between an uplink control information type carried on the first channel and the resource used to send the signal on the first channel, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

5. The method according to claim 1 , wherein the determining, by the terminal, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises:
determining, by the terminal based on the resource used to send the signal on the first channel and a correspondence between the first reference signal and a resource used by the terminal to send a signal on a channel, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

6. A terminal, comprising:
a transceiver, configured to receive indication information from a network device, wherein the indication information comprises an identifier of at least one reference signal; and
a processor, configured to determine that there is a correspondence between a resource used to send a signal on a first channel and a first reference signal of the at least one reference signal, wherein the first channel is a channel on which the signal is to be transmitted by the terminal, and wherein:
a spatial filter used to transmit the signal on the first channel is the same as a spatial filter used to transmit the first reference signal,
or
a spatial filter used to transmit a demodulation reference signal of the first channel is the same as a spatial filter used to transmit the first reference signal,
wherein the determining that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal of the at least one reference signal comprises determining based on a correspondence between the first reference signal and a first cell identifier that is received by the terminal and a correspondence between the first cell identifier and the resource used to send the signal on the first channel.

7. The terminal according to claim 6 , wherein the processor is further configured to:
determine, based on a correspondence between the first reference signal and a time-frequency resource used to transmit a second signal on a second channel and a correspondence between the resource used to transmit the second signal on the second channel and the resource used to send the signal on the first channel, that there is a correspondence between the resource used to send the signal on the first channel and the first reference signal, wherein the second channel is a channel used to transmit downlink control information.

8. The terminal according to claim 6 , wherein the processor is further configured to:
determine, based on a correspondence between the first reference signal and a reporting configuration of a reference signal used to measure channel state information, and the resource that is of the first channel and that is configured in the reporting configuration of the reference signal used to measure the channel state information, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

9. The terminal according to claim 6 , wherein the processor is further configured to:
determine, based on a correspondence between the first reference signal and an uplink control information type and a correspondence between an uplink control information type carried on the first channel and the resource used to send the signal on the first channel, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

10. The terminal according to claim 6 , wherein the processor is further configured to:
determine, based on the resource used to send the signal on the first channel and a correspondence between the first reference signal and a resource used by the terminal to send a signal on a channel, that there is the correspondence between the resource used to send the signal on the first channel and the first reference signal.

11. A network device, comprising:
a processor, configured to generate indication information, wherein the indication information comprises an identifier of at least one reference signal; and
a transceiver, configured to send

Assignees

• Huawei Tech Co Ltd

Inventors

• Qin Yi
• Li Zhongfeng
• Dou Shengyue

Classifications

• H04W72/23

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

• H04B7/06966 Primary

  using beam correspondence; using channel reciprocity, e.g. downlink beam training based on uplink sounding reference signal [SRS] · CPC title

• H04L5/10 Primary

  with dynamo-electric generation of carriers; with mechanical filters or demodulators · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0023

  Time-frequency-space · CPC title