Channel measurement method and device

Patent metadata

Field	Value
Publication number	US-12021776-B2
Application number	US-202017436766-A
Country	US
Kind code	B2
Filing date	Feb 28, 2020
Priority date	Mar 7, 2019
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

Embodiments of this application disclose a channel measurement method and device. The method includes: receiving, by an access network device, a sounding reference signal (SRS) from a terminal device; receiving, by the access network device from the terminal device, a power adjustment factor used by first antenna ports, where the first antenna ports are antenna ports used by the terminal device to send a data signal; determining, by the access network device, a first uplink channel based on the SRS; and determining, by the access network device, a target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports, where the target channel is a target uplink channel or a target downlink channel.

First claim

What is claimed is:

1. A channel measurement method, comprising:
receiving, by an access network device, a sounding reference signal (SRS) from a terminal device;
receiving, by the access network device from the terminal device, a power adjustment factor used by first antenna ports, wherein the first antenna ports are antenna ports used by the terminal device to send a data signal, the receiving comprising:
receiving, by the access network device from the terminal device, at least a power adjustment factor used by a target antenna port in the first antenna ports, and a ratio of a power adjustment factor used by a third antenna port to the power adjustment factor used by the target antenna port, wherein the third antenna port is an antenna port other than the target antenna port in the first antenna ports;

determining, by the access network device, a first uplink channel based on the SRS; and
determining, by the access network device, a target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports, wherein the target channel is a target uplink channel or a target downlink channel, the determining comprising:
computing, by the access network device, the target channel based on the first uplink channel, the power adjustment factor used by the target antenna port, and the ratio.

2. The method according to claim 1 , wherein a quantity of antennas for sending a data signal by the terminal is less than a quantity of antennas for receiving a data signal, the target channel is the target uplink channel, and the SRS comprises a first SRS sent by the terminal device by using the first antenna ports; and
wherein determining, by the access network device, the first uplink channel based on the SRS comprises:
determining, by the access network device, the first uplink channel based on the first SRS.

3. The method according to claim 2 , wherein the SRS further comprises a second SRS sent by the terminal device by using a second antenna port, and the second antenna port is an antenna port not used by the terminal device to send a data signal; and the method further comprises:
determining, by the access network device, a second uplink channel based on the second SRS; and
computing, by the access network device, the target downlink channel based on the first uplink channel and the second uplink channel.

4. The method according to claim 1 , wherein a quantity of antennas for sending a data signal by the terminal is less than a quantity of antennas for receiving a data signal, the target channel is the target downlink channel, the SRS comprises a first SRS sent by the terminal device by using the first antenna ports and a second SRS sent by the terminal device by using a second antenna port, and the second antenna port is an antenna port not used by the terminal device to send a data signal;
wherein the first uplink channel comprises a second uplink channel and a third uplink channel, and determining, by the access network device, the first uplink channel based on the SRS comprises:
determining, by the access network device, the second uplink channel based on the first SRS; and
determining, by the access network device, the third uplink channel based on the second SRS; and
wherein determining, by the access network device, the target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports comprises:
determining, by the access network device, a fourth uplink channel based on the second uplink channel and the power adjustment factor used by the first antenna ports; and
determining, by the access network device, the target downlink channel based on the third uplink channel and the fourth uplink channel.

5. The method according to claim 4 , wherein the method further comprises:
determining, by the access network device, the second uplink channel as the target uplink channel.

6. The method according to claim 4 ,
wherein determining, by the access network device, the fourth uplink channel based on the second uplink channel and the power adjustment factor used by the first antenna ports comprises:
determining, by the access network device, the fourth uplink channel based on the second uplink channel, the power adjustment factor used by the target antenna port, and the ratio.

7. The method according to claim 1 , wherein a quantity of antennas for sending a data signal by the terminal is equal to a quantity of antennas for receiving a data signal, the target channel is the target downlink channel, and the SRS comprises a first SRS sent by the terminal device by using the first antenna ports;
wherein determining, by the access network device, a first uplink channel based on the SRS comprises:
determining, by the access network device, the first uplink channel based on the first SRS; and
wherein determining, by the access network device, the target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports comprises:
determining, by the access network device, a fifth uplink channel based on the first uplink channel and the power adjustment factor used by the first antenna ports; and
determining, by the access network device, the target downlink channel based on the fifth uplink channel.

8. The method according to claim 7 ,
wherein determining, by the access network device, the fifth uplink channel based on the first uplink channel and the power adjustment factor used by the first antenna ports comprises:
determining, by the access network device, the fifth uplink channel based on the first uplink channel, the power adjustment factor used by the target antenna port, and the ratio.

9. An access network device, wherein the access network device comprises at least one processor, a memory, and a communications interface;
the memory is configured to store program instructions;
wherein the at least one processor is configured to perform the following operations based on the program instructions:
receiving a sounding reference signal (SRS) from a terminal device by using the communications interface;
receiving, by using the communications interface from the terminal device, a power adjustment factor used by first antenna ports, wherein the first antenna ports are antenna ports used by the terminal device to send a data signal, wherein receiving the power adjustment factor used by the first antenna ports comprises:
receiving at least a power adjustment factor used by a target antenna port in the first antenna ports, and a ratio of a power adjustment factor used by a third antenna port to the power adjustment factor used by the target antenna port, wherein the third antenna port is an antenna port other than the target antenna port in the first antenna ports;
determining a first uplink channel based on the SRS; and
determining a target channel based on the first uplink channel and the power adjustment factor used by the first antenna ports, wherein the target channel is a target uplink channel or a target downlink channel, wherein determining the target channel comprises:
computing the target channel based on the first uplink channel, the power adjustment factor used by the target antenna port, and the ratio.

10. The access network device according to claim 9 , wherein a quantity of antennas for sending a data signal by the terminal is less than a quantity of antennas for receiving a data signal, the target channel is the target uplink channel, and the SRS comprises a first SRS sent by the terminal device by using the first antenna ports; and
wherein the at least one processor is further configured to:
determine the first uplink channel based on the first SRS.

Assignees

• Honor Device Co Ltd

Inventors

• Qian Feng
• Shen Li
• Wang Jian
• Li Xiaocui
• Xue Yifan

Classifications

• H04L25/0226

  sounding signals per se · CPC title

• H04L5/0053

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

• H04B7/0426

  Power distribution · CPC title

• H04B7/0691

  using subgroups of transmit antennas · CPC title

• H04L25/0204

  of multiple channels · CPC title