Phase correction term values for bluetooth channel sounding procedures

Patent metadata

Field	Value
Publication number	US-2025311028-A1
Application number	US-202418622032-A
Country	US
Kind code	A1
Filing date	Mar 29, 2024
Priority date	Mar 29, 2024
Publication date	Oct 2, 2025
Grant date	—

Abstract

Aspects of the disclosure are directed to phase correction term (PCT) values for Bluetooth channel sounding (BCS) procedures. In an aspect, filtering out PCT values based on poor-quality measurements and deriving PCT values by combining phase-sum across time may help to improve overall performance. Such aspects may provide various technical advantages, such as improving ranging accuracy, reducing ranging latency, and so on.

First claim

What is claimed is:

1 . A first user equipment (UE), comprising:
one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: perform one or more first measurements of a first set of channels associated with a first Bluetooth channel sounding (BCS) procedure between the first UE and a second UE; determine, for each channel in a first subset of the first set of channels with a respective quality metric above a threshold, a first phase correction term (PCT) value based on the one or more first measurements; perform one or more second measurements of a second set of channels associated with a second BCS procedure between the first UE and a second UE, wherein the first set of channels and the second set of channels overlapping at least in part; determine, for each channel in a second subset of the second set of channels with a respective quality metric below a second threshold, a second PCT value that is based at least in part on a respective first PCT value that is associated with the first BCS procedure and is for a corresponding channel from the first subset of the first set of channels; and estimate a range between the first UE and the second UE based on the second PCT value for each channel in the second subset of the second set of channels.

2 . The first UE of claim 1 , wherein each first PCT value is determined based on one or more complex-valued in-phase/quadrature (I/Q) samples of one or more signals received over the respective channel.

3 . The first UE of claim 1 , wherein, for each channel in the second subset of the second set of channels, the second PCT value is set equal to the respective first PCT value.

4 . The first UE of claim 1 , wherein, for each channel in the second subset of the second set of channels, the second PCT value is derived via a function that is based on the respective first PCT value.

5 . The first UE of claim 4 , wherein the function comprises an interpolation, an average, a weighted average, a median or a combination thereof.

6 . The first UE of claim 4 , wherein the function is based on at least one other PCT value that is associated with at least one other BCS procedure and is for the corresponding channel from the first subset of the first set of channels.

7 . The first UE of claim 6 , wherein the at least one other BCS procedure includes each BCS procedure performed during a time window.

8 . The first UE of claim 7 , wherein a duration of the time window is based on a range estimate between the first UE and the second UE, mobility information associated with the first UE or the second UE or both, or a combination thereof.

9 . The first UE of claim 4 , wherein the function is based on a respective PCT value that is associated with the second BCS procedure and is for the corresponding channel from the first subset of the first set of channels.

10 . The first UE of claim 4 , wherein the function is implemented in a PCT value domain, a phase domain or an amplitude domain.

11 . The first UE of claim 4 , wherein the function is based on one or more filtering-related parameters comprising:
on at least one quality metric associated with the first BCS procedure, or an age associated with the first BCS procedure, or displacement information associated with the second BCS procedure, or mobility information associated with the first UE or the second UE or both during the second BCS procedure, or a first BCS configuration associated with the first BCS procedure, or a second BCS configuration associated with the second BCS procedure, or any combination thereof.

12 . The first UE of claim 4 , wherein the one or more processors, either alone or in combination, are further configured to:
receive, via the one or more transceivers, assistance data from a network component that comprises one or more parameters associated with the function.

13 . The first UE of claim 1 , wherein the one or more processors, either alone or in combination, are further configured to:
transmit, via the one or more transceivers, an indication of one or more parameters associated with the first BCS procedure or the second BCS procedure or both to a network component.

14 . The first UE of claim 13 , wherein the one or more parameters comprise a filtering-related parameter, coarse position information, quality-of-experience (QoE) information, one or more PCT values, or any combination thereof.

15 . The first UE of claim 1 , wherein the first set of channels and the second set of channels comprises a common subset of channels.

16 . The first UE of claim 15 , wherein the common subset of channels comprises N strongest channels from the first set of channels based on the quality metric.

17 . A method of operating a first user equipment (UE), comprising:
performing one or more first measurements of a first set of channels associated with a first Bluetooth channel sounding (BCS) procedure between the first UE and a second UE; determining, for each channel in a first subset of the first set of channels with a respective quality metric above a threshold, a first phase correction term (PCT) value based on the one or more first measurements; performing one or more second measurements of a second set of channels associated with a second BCS procedure between the first UE and a second UE, wherein the first set of channels and the second set of channels overlapping at least in part; determining, for each channel in a second subset of the second set of channels with a respective quality metric below a second threshold, a second PCT value that is based at least in part on a respective first PCT value that is associated with the first BCS procedure and is for a corresponding channel from the first subset of the first set of channels; and estimating a range between the first UE and the second UE based on the second PCT value for each channel in the second subset of the second set of channels.

18 . A network component, comprising:
one or more memories; one or more transceivers; and one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processors, either alone or in combination, configured to: crowd-sourcing, from each user equipment (UE) of a set of UEs, parameters associated with one or more Bluetooth channel sounding (BCS) procedures; determine a set of parameters associated with a function for deriving a phase correction term (PCT) value associated with corresponding channels of respective BCS procedures based on the crowd-sourced parameters; and transmit, via the one or more transceivers, to one or more UEs, assistance data comprising the set of parameters.

19 . The network component of claim 18 , wherein the crowd-sourced parameters comprise a filtering-related parameter, coarse position information, quality-of-experience (QoE) information, one or more PCT values, or any combination thereof.

20 . The network component of claim 18 , wherein the set of parameters comprises a filtering-related parameter.

Assignees

• Qualcomm Inc

Inventors

• Reddy Varun Amar
• Zorgui Marwen
• Akkarakaran Sony
• Kang Eunmo

Classifications

• H04W76/14 Primary

  Direct-mode setup · CPC title