Dynamic mixed mode beam correspondence in upper millimeter wave bands

Patent metadata

Field	Value
Publication number	US-11856570-B2
Application number	US-202117157915-A
Country	US
Kind code	B2
Filing date	Jan 25, 2021
Priority date	Jan 27, 2020
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

Methods, systems, and devices for wireless communications are described. A first device may indicate a dynamic beam correspondence operation for communications with a second device. For example, the dynamic beam correspondence operation may be declared in a time-dependent manner, for certain transmission configuration indication (TCI) states or time-dependent TCI states. Further, the first device may declare no beam correspondence and associated power savings and thermal reductions that result from the lack of beam correspondence. Subsequently, based on the dynamic beam correspondence operation, the second device may identify parameters (e.g., which TCI states, subarrays) for the first device to use for different modes or procedures (e.g., at a corresponding time) based on parameters that correspond to a full beam correspondence or no beam correspondence. For example, the parameters may be used for initial access, beam failure recovery, low power modes, or high temperature modes.

First claim

What is claimed is:

1. A method for wireless communications at a first device, comprising:
transmitting, for a second device, a capability indicating a status for dynamic beam correspondence with the second device, transmission of the capability being based at least in part on a first set of antenna elements being different from a second set of antenna elements, the first set of antenna elements used for downlink communications with the second device, and the second set of antenna elements used for uplink communications with the second device, the capability further indicating at least a first beam correspondence capability for a first transmission time interval and a second beam correspondence capability for a second transmission time interval;
receiving, from the second device, an indication of an operating mode to use for communications with the second device, the operating mode being based at least in part on the capability; and
communicating with the second device based at least in part on the indication of the operating mode.

2. The method of claim 1 , the transmitting the capability comprising:
transmitting, for the second device, a time-dependent status for the dynamic beam correspondence with the second device, the time-dependent status for the dynamic beam correspondence comprising at least the first beam correspondence capability for the first transmission time interval or the second beam correspondence capability for the second transmission time interval, or both.

3. The method of claim 2 , the time-dependent status indicating a beam correspondence capability that changes for different transmission time intervals.

4. The method of claim 1 , the first beam correspondence capability comprising an indication of beam correspondence for the first transmission time interval, the second beam correspondence capability comprising an indication of no beam correspondence for the second transmission time interval, or a combination thereof.

5. The method of claim 1 , the first transmission time interval and the second transmission time interval comprising one or more different symbols, slots, or subframes.

6. The method of claim 1 , the transmitting the capability comprising:
transmitting, for the second device, a first indication of beam correspondence for one or more first transmission configuration indication states, a second indication of no beam correspondence for one or more second transmission configuration indication states, or a combination thereof.

7. The method of claim 6 , wherein the first indication of beam correspondence, the second indication of no beam correspondence, or both are time-dependent.

8. The method of claim 1 , the transmitting the capability comprising:
transmitting, for the second device, an indication of no beam correspondence; and
transmitting, for the second device, an amount of power savings, a reduction in temperature or temperature gradient, or both for the communications with the second device, the amount of power savings, the reduction in temperature or temperature gradient, or both resulting from the indication of no beam correspondence.

9. The method of claim 1 , the receiving the indication of the operating mode comprising:
receiving, from the second device, an indication to use one or more transmission configuration indication states, one or more subarrays, or a combination thereof, the one or more transmission configuration indication states, the one or more subarrays, or the combination thereof having full beam correspondence for the communications with the second device.

10. The method of claim 9 , wherein the one or more transmission configuration indication states, the one or more subarrays, or the combination thereof are used for an initial access procedure, for a beam failure recovery procedure, or both.

11. The method of claim 9 , wherein the one or more transmission configuration indication states, the one or more subarrays, or the combination thereof are used for a low power mode, a high temperature or temperature gradient mode, or both.

12. The method of claim 9 , wherein the full beam correspondence comprises a calibration adjusted same set of beam weights, antenna amplitudes, antenna phases, or a combination thereof that are used for both a downlink beam and an uplink beam for the communications with the second device.

13. The method of claim 1 , the capability indicating the status for dynamic beam correspondence with the second device comprising a mixed beam correspondence mode operation indication.

14. The method of claim 1 , the communications with the second device occurring on frequencies that are greater than 24.25 GHz.

15. The method of claim 1 , the first device comprising a user equipment (UE) or a customer premises equipment (CPE) in a wireless communications system and the second device comprising a network device, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communications system.

16. A method for wireless communications at a second device, comprising:
receiving a capability indicating a status for dynamic beam correspondence between a first device and the second device, the capability further indicating at least a first beam correspondence capability for a first transmission time interval and a second beam correspondence capability for a second transmission time interval;
transmitting an indication of an operating mode to use for communications with the second device, the operating mode based at least in part on the capability; and
communicating based at least in part on the indication of the operating mode.

17. The method of claim 16 , the receiving the capability comprising:
receiving a time-dependent status for the dynamic beam correspondence between the first device and the second device, the time-dependent status for the dynamic beam correspondence comprising at least the first beam correspondence capability for the first transmission time interval or the second beam correspondence capability for the second transmission time interval, or both.

18. The method of claim 17 , the time-dependent status indicating a beam correspondence capability that changes for different transmission time intervals.

19. The method of claim 16 , the first beam correspondence capability comprising an indication of beam correspondence for the first transmission time interval, the second beam correspondence capability comprising an indication of no beam correspondence for the second transmission time interval, or a combination thereof.

20. The method of claim 16 , the receiving the capability comprising:
receiving, from the first device, a first indication of beam correspondence for one or more first transmission configuration indication states, a second indication of no beam correspondence for one or more second transmission configuration indication states, or a combination thereof, wherein the first indication of beam correspondence, the second indication of no beam correspondence, or both are time-dependent.

21. The method of claim 16 , the receiving the capability comprising:
receiving, from the first device, an indication of no beam correspondence; and
receiving, from the first device, an amount of power savings, a reduction in temperature or temperature gradient, or both for the communications with the first device, the amount of power savings, the reduction in temperature or temperature gradient, or both resulting from the indication of no beam correspondence.

Assignees

• Qualcomm Inc

Inventors

• Raghavan Vasanthan
• Luo Tao
• Li Junyi
• Douglas Robert Keith
• Dorosenco Alexander

Classifications

• H04B7/06966

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

• H04W72/046 Primary

  the resource being in the space domain, e.g. beams · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W72/51

  based on terminal or device properties · CPC title

• H04L5/0023 Primary

  Time-frequency-space · CPC title