Management of MIMO communication systems

Patent metadata

Field	Value
Publication number	US-11949474-B2
Application number	US-202217811494-A
Country	US
Kind code	B2
Filing date	Jul 8, 2022
Priority date	May 5, 2017
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Apparatuses of a user equipment (UE), a cellular base station, and radio access network (RAN) nodes are disclosed. An apparatus of a wireless communication device includes circuitry configured to measure reference signals received from a plurality of antennas of an other wireless communication device, and circuitry configured to cause one or more antennas of the wireless communication device to transmit information regarding the received reference signals back to the other wireless communication device to enable the other wireless communication device to estimate a utility function for different transmit parameter sets.

First claim

The invention claimed is:

1. A user equipment (UE), comprising:
a data storage device configured to store a first beamforming codebook that corresponds to a plurality of antennas of the UE; and
processing circuitry configured to:
generate one or more measurements of a receive beam space of the first beamforming codebook according to reduced or compressed dimensions for the receive beam space of the first beamforming codebook, wherein a number of the one or more measurements is less than a number of receive beams of the first beamforming codebook, the one or more measurements corresponding to the entire beam space;
determine a best receive beam of the first beamforming codebook based on the one or more measurements; and
use the best receive beam of the first beamforming codebook to receive data bearing signals from a cellular base station.

2. The UE of claim 1 , wherein the processing circuitry is further configured to transition to use a second beamforming codebook instead of the first beamforming codebook responsive to a change in a signal propagation environment.

3. The UE of claim 1 , wherein the processing circuitry is further configured to generate a message to be transmitted to the cellular base station, the message configured to indicate a number of reference signals that are to be transmitted by the cellular base station.

4. The UE of claim 3 , wherein the processing circuitry is further configured to generate the message to be transmitted to multiple cellular base stations.

5. The UE of claim 1 , wherein the processing circuitry is further configured to:
estimate an effective channel gain for one or more beam pairs; and
generate a message to be transmitted to the cellular base station, the message indicating the estimated effective channel gain.

6. The UE of claim 1 , wherein the one or more measurements are generated based on measurements of reference signals received from the cellular base station and the best receive beam is determined based on a combinational optimization between the one or more measurements and potential receive beams of the first beam forming codebook to maximize effective channel gain.

7. A non-transitory computer-readable storage medium, the non- transitory computer-readable storage medium including instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
store a first beamforming codebook that corresponds to a plurality of antennas of the UE;
generate one or more measurements of a receive beam space of the first beamforming codebook according to reduced or compressed dimensions for the receive beam space of the first beamforming codebook, wherein a number of the one or more measurements is less than a number of receive beams of the first beamforming codebook, the one or more measurements corresponding to the entire beam space;
determine a best receive beam of the first beamforming codebook based on the one or more measurements; and
use the best receive beam of the first beamforming codebook to receive data bearing signals from a cellular base station.

8. The non-transitory computer-readable storage medium of claim 7 , wherein the instructions, when executed, further cause the one or more processors to transition to use a second beamforming codebook instead of the first beamforming codebook responsive to a change in a signal propagation environment.

9. The non-transitory computer-readable storage medium of claim 7 , wherein the instructions, when executed, further cause the one or more processors to generate a message to be transmitted to the cellular base station, the message configured to indicate a number of reference signals that are to be transmitted by the cellular base station.

10. The non-transitory computer-readable storage medium of claim 9 , wherein the instructions, when executed, further cause the one or more processors to generate the message to be transmitted to multiple cellular base stations.

11. The non-transitory computer-readable storage medium of claim 7 , wherein the instructions, when executed, further cause the one or more processors to:
estimate an effective channel gain for one or more beam pairs; and
generate a message to be transmitted to the cellular base station, the message indicating the estimated effective channel gain.

12. The non-transitory computer-readable storage medium of claim 7 , wherein the one or more measurements are generated based on measurements of reference signals received from the cellular base station and the best receive beam is determined based on a combinational optimization between the one or more measurements and potential receive beams of the first beam forming codebook to maximize effective channel gain.

13. A method for a user equipment (UE), the method comprising:
storing a first beamforming codebook that corresponds to a plurality of antennas of the UE;
generating one or more measurements of a receive beam space of the first beamforming codebook according to reduced or compressed dimensions for the receive beam space of the first beamforming codebook, wherein a number of the one or more measurements is less than a number of receive beams of the first beamforming codebook, the one or more measurements corresponding to the entire beam space;
determining a best receive beam of the first beamforming codebook based on the one or more measurements; and
using the best receive beam of the first beamforming codebook to receive data bearing signals from a cellular base station.

14. The method of claim 13 , further comprising using a second beamforming codebook instead of the first beamforming codebook responsive to a change in a signal propagation environment.

15. The method of claim 13 , further comprising generating a message to be transmitted to the cellular base station, the message configured to indicate a number of reference signals that are to be transmitted by the cellular base station.

16. The method of claim 15 , further comprising generating the message to be transmitted to multiple cellular base stations.

17. The method of claim 13 , further comprising:
estimating an effective channel gain for one or more beam pairs; and
generating a message to be transmitted to the cellular base station, the message indicating the estimated effective channel gain.

18. The method of claim 13 , wherein the one or more measurements are generated based on measurements of reference signals received from the cellular base station and the best receive beam is determined based on a combinational optimization between the one or more measurements and potential receive beams of the first beam forming codebook to maximize effective channel gain.

Assignees

• Apple Inc

Inventors

• Schreck Jan
• Himayat Nageen
• Nikopour Hosein
• Xue Feng
• Aryafar Ehsan
• Orhan Oner
• Akdeniz Mustafa R
• Lee Wook Bong
• Zhu Jing

Classifications

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/0417

  Feedback systems · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04L5/0051

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