Dynamic beam management

Patent metadata

Field	Value
Publication number	US-12556259-B2
Application number	US-202318491518-A
Country	US
Kind code	B2
Filing date	Oct 20, 2023
Priority date	Oct 20, 2023
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive downlink communications with a receive beam that is formed using a set of antenna elements. The UE may measure, in parallel with the receiving the downlink communications, a channel impulse response (CIR) for each antenna element of the set of antenna elements in a round-robin fashion. The UE may generate a second receive beam or a transmit beam based at least in part on the CIRs for the set of antenna elements. Numerous other aspects are described.

First claim

What is claimed is:

1 . An apparatus for wireless communication at a user equipment (UE), comprising:
one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the UE to:
receive downlink communications with a receive beam, using a first radio frequency (RF) chain, wherein the receive beam is formed using a set of antenna elements;
measure, using a second RF chain, in parallel with the receiving the downlink communications, a channel impulse response (CIR) for each antenna element of the set of antenna elements in a round-robin fashion; and
generate a second receive beam or a transmit beam based at least in part on the CIRs for the set of antenna elements.

2 . The apparatus of claim 1 ,
wherein the one or more processors are individually or collectively configured to cause the UE to, for each slot:
receive a downlink communication in the slot with the first RF chain; and
measure a CIR of the downlink communication for an antenna element in the slot with the second RF chain.

3 . The apparatus of claim 1 ,
wherein the one or more processors, to measure the CIR, are individually or collectively configured to cause the UE to measure the CIR of a demodulation reference signal in a downlink communication.

4 . The apparatus of claim 1 ,
wherein the one or more processors, to measure the CIR for each antenna element in a round-robin fashion, are individually or collectively configured to cause the UE to measure the CIR of each antenna element in a slot, wherein the set of antenna elements are measured in consecutive slots, and wherein a quantity of the set of antenna elements equals a quantity of the consecutive slots.

5 . The apparatus of claim 1 ,
wherein the one or more processors are individually or collectively configured to cause the UE to generate a new receive beam or a new transmit beam in each slot.

6 . The apparatus of claim 1 ,
wherein the one or more processors are individually or collectively configured to cause the UE to generate a new receive beam or a new transmit beam based at least in part on one or more eigenvectors of a channel correlation matrix that is formed from CIRs that are measured for the set of antenna elements.

7 . The apparatus of claim 1 , wherein the downlink communications comprise physical downlink shared channel (PDSCH) communications.

8 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving downlink communications with a receive beam, using a first radio frequency (RF) chain, wherein the receive beam is formed using a set of antenna elements; measuring, using a second RF chain, in parallel with the receiving the downlink communications, a channel impulse response (CIR) for each antenna element of the set of antenna elements in a round-robin fashion; and generating a second receive beam or a transmit beam based at least in part on the CIRs for the set of antenna elements.

9 . The method of claim 8 ,
wherein the receiving and the measuring includes, for each slot:
receiving a downlink communication in the slot with the first RF chain; and
measuring a CIR of the downlink communication for an antenna element in the slot with the second RF chain.

10 . The method of claim 8 ,
wherein measuring the CIR includes measuring the CIR of a demodulation reference signal in a downlink communication.

11 . The method of claim 8 ,
wherein measuring the CIR for each antenna element in a round-robin fashion includes measuring the CIR of each antenna element in a slot, wherein the set of antenna elements are measured in consecutive slots, and wherein a quantity of the set of antenna elements equals a quantity of the consecutive slots.

12 . The method of claim 8 ,
wherein the generating includes generating a new receive beam or a new transmit beam in each slot.

13 . The method of claim 8 ,
wherein the generating includes generating a new receive beam or a new transmit beam based at least in part on one or more eigenvectors of a channel correlation matrix that is formed from CIRs that are measured for the set of antenna elements.

14 . The method of claim 8 , wherein the downlink communications comprise physical downlink shared channel (PDSCH) communications.

15 . An apparatus for wireless communication, comprising:
means for receiving downlink communications with a receive beam, using a first radio frequency (RF) chain, wherein the receive beam is formed using a set of antenna elements; means for measuring, using a second RF chain, in parallel with the receiving the downlink communications, a channel impulse response (CIR) for each antenna element of the set of antenna elements in a round-robin fashion; and means for generating a second receive beam or a transmit beam based at least in part on the CIRs for the set of antenna elements.

16 . The apparatus of claim 15 , further comprising means for, for each slot:
receiving a downlink communication in the slot with the first RF chain; and measuring a CIR of the downlink communication for an antenna element in the slot with the second RF chain.

17 . The apparatus of claim 15 ,
wherein the means for measuring the CIR includes means for measuring the CIR of a demodulation reference signal in a downlink communication.

18 . The apparatus of claim 15 ,
wherein the means for measuring the CIR for each antenna element in a round-robin fashion includes means for measuring the CIR of each antenna element in a slot, wherein the set of antenna elements are measured in consecutive slots, and wherein a quantity of the set of antenna elements equals a quantity of the consecutive slots.

19 . The apparatus of claim 15 , further comprising
means for generating a new receive beam or a new transmit beam in each slot.

20 . The apparatus of claim 15 , wherein the downlink communications comprise physical downlink shared channel (PDSCH) communications.

Assignees

• Qualcomm Inc

Inventors

• Zhu Jun
• Challa Raghu Narayan
• Wu Yongle
• Gao Kang
• Iyer Sumant Jayaraman
• Patel Shrenik
• Mccloud Michael Lee
• Banister Brian Clarke

Classifications

• H04L25/0212

  of impulse response · CPC title

• H04B7/0639

  Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection · CPC title

• H04B17/24

  with feedback of measurements to the transmitter · CPC title

• H04L25/0204

  of multiple channels · CPC title

• H04L25/0224

  using sounding signals · CPC title