Position relationship determining method and apparatus

Patent metadata

Field	Value
Publication number	US-11166254-B2
Application number	US-201916698026-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Nov 30, 2018
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

A position relationship determining method and apparatus includes determining a position relationship between a first wireless local area network (WLAN) device and a second WLAN device based on exceeded-bandwidth wireless channel characteristic data, where the exceeded-bandwidth wireless channel characteristic data is a result obtained after combining wireless channel characteristic data corresponding to all WLAN channels in a channel set, the channel set includes at least two WLAN channels, all the WLAN channels in the channel set belong to a single WLAN frequency band, a total bandwidth occupied by all the WLAN channels in the channel set is greater than 160 megahertz and is greater than a maximum single channel bandwidth supported by the single WLAN frequency band.

First claim

What is claimed is:

1. A position relationship determining method, comprising:
combining wireless channel characteristic data of all wireless local area network (WLAN) channels in a channel set to obtain exceeded-bandwidth wireless channel characteristic data, wherein the channel set comprises at least two WLAN channels, wherein all the WLAN channels in the channel set belong to a single WLAN frequency band, wherein a total bandwidth occupied by the WLAN channels is greater than 160 megahertz (MHz) and is greater than a maximum single channel bandwidth supported by the single WLAN frequency band, and wherein wireless channel characteristic data corresponding to each WLAN channel in the channel set is a measurement result of a signal for a corresponding WLAN channel between a first WLAN device and a second WLAN device; and
determining a position relationship between the first WLAN device and the second WLAN device based on the exceeded-bandwidth wireless channel characteristic data.

2. The position relationship determining method of claim 1 , wherein wireless channel characteristic data corresponding to any WLAN channel in the channel set comprise first-direction channel state information (CSI) and second-direction CSI, wherein the first-direction CSI corresponds to a first WLAN channel in the channel set, wherein the second-direction CSI corresponds to the first WLAN channel, and wherein the position relationship determining method further comprises:
obtaining the first-direction CSI from the second WLAN device, wherein the first-direction CSI is based on a measurement result for a first signal that is sent from the first WLAN device on the first WLAN channel; and
obtaining the second-direction CSI from the first WLAN device, wherein the second-direction CSI is based on a measurement result for a second signal that is sent from the second WLAN device on the first WLAN channel.

3. The position relationship determining method of claim 2 , wherein third wireless channel characteristic data that corresponds to a specified WLAN channel in the channel set further comprise a first-direction sending time, a first-direction receiving time, a second-direction sending time, and a second-direction receiving time, wherein the first-direction sending time is a time that a third signal is sent from the first WLAN device on the specified WLAN channel, wherein the first-direction receiving time is a time that the third signal is received on the specified WLAN channel, wherein the second-direction sending time is a time that a fourth signal is sent on the specified WLAN channel, and wherein the second-direction receiving time is a time that the fourth signal is received on the specified WLAN channel.

4. The position relationship determining method of claim 3 , wherein the position relationship is a distance between the first WLAN device and the second WLAN device, wherein determining the position relationship between the first WLAN device and the second WLAN device based on the exceeded-bandwidth wireless channel characteristic data comprises:
obtaining first-direction exceeded-bandwidth CSI combining all first-direction CSI corresponding to the WLAN channels in the channel set;
performing an inverse Fourier transform on the first-direction exceeded-bandwidth CSI after obtaining the first-direction exceeded-bandwidth CSI to obtain a first energy delay function, wherein the first energy delay function comprises a plurality of first energy values and a first delay offset that corresponds to each of the first energy values;
obtaining second-direction exceeded-bandwidth CSI combining all second-direction CSI corresponding to all the WLAN channels in the channel set;
performing an inverse Fourier transform on the second-direction exceeded-bandwidth CSI after obtaining the second-direction exceeded-bandwidth CSI to obtain a second energy delay function, wherein the second energy delay function comprises a plurality of second energy values and a second delay offset that corresponds to each of the second energy values;
adjusting, based on an earliest delay offset in a first direction, the first-direction receiving time that corresponds to the specified WLAN channel, wherein the earliest delay offset in the first direction corresponds to an energy value that exceeds a first energy threshold that is part of the first energy delay function;
adjusting, based on an earliest delay offset in a second direction, the second-direction receiving time that corresponds to the specified WLAN channel, wherein the earliest delay offset in the second direction corresponds to an energy value that exceeds a second energy threshold that is part of the second energy delay function; and
determining the distance between the first WLAN device and the second WLAN device based on an adjusted first-direction receiving time, an adjusted second-direction receiving time, the first-direction sending time that corresponds to the specified WLAN channel, and the second-direction sending time that corresponds to the specified WLAN channel.

5. The position relationship determining method of claim 1 , wherein the position relationship is an included angle between a direction of an antenna array of the first WLAN device and a straight line that passes through a linear position of the first WLAN device and a linear position of the second WLAN device, wherein a second wireless channel characteristic data that corresponds to a second WLAN channel in the channel set comprises second wireless channel characteristic data of at least two antennas that is part of the antenna array of the first WLAN device, and wherein determining the position relationship between the first WLAN device and the second WLAN device based on the exceeded-bandwidth wireless channel characteristic data comprises determining, based on second exceeded-bandwidth wireless channel characteristic data of each of the antennas and a distance between any two of the antennas, the included angle between the direction of the antenna array of the first WLAN device and the straight line that passes through the linear position of the first WLAN device and the linear position of the second WLAN device.

6. The position relationship determining method of claim 5 , wherein a direction of the straight line is a known value, and wherein after determining the included angle between the direction of the antenna array of the first WLAN device and the straight line that passes through the linear position of the first WLAN device and the linear position of the second WLAN device, the method further comprises determining the direction of the antenna array of the first WLAN device based on the direction of the straight line and the included angle.

7. A position relationship determining method, comprising:
combining wireless channel characteristic data of all wireless local area network (WLAN) channels in a channel set to obtain an exceeded-bandwidth wireless channel characteristic data, wherein the channel set comprises at least two WLAN channels, wherein all the WLAN channels in the channel set belong to a single WLAN frequency band, wherein a total bandwidth occupied by the WLAN channels is greater than 160 megahertz and is greater than a maximum single channel bandwidth supported by the single WLAN frequency band, and wherein wireless channel characteristic data corresponding to each WLAN channel in the channel set is a measurement result for a signal for a corresponding WLAN channel between a first WLAN device and a second WLAN device;
determining, based on the exceeded-bandwidth wireless channel characteristic data, a distance between the first WLAN device and the second WLAN device, an included angle between a direction of an antenna array of the first WLAN device and a straight line that passes thro

Assignees

• Huawei Tech Co Ltd
• Huawei Technolgoies Co Ltd

Inventors

• Pan Chun
• Gu Weiwei
• Cui Jianlei
• Wang Yungui

Classifications

• G01S3/48

  the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured · CPC title

• H04W64/00

  Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management · CPC title

• H04B17/309

  Measuring or estimating channel quality parameters · CPC title

• H04L1/0026

  Transmission of channel quality indication · CPC title

• H04W4/023 Primary

  using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds · CPC title