US-12625221-B2 - Hybrid positioning based on frequency dependent propagation effects

Abstract

Disclosed are techniques for wireless communication. In an aspect, a server device may obtain a channel frequency of a channel of a transmission-reception point (TRP), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel. The server device may determine a first frequency-scaled filtering distance by applying a frequency-scaled filtering distance model based on the channel frequency, a nominal frequency of the TRP, a first filtering distance, and a decay parameter of the TRP. In an aspect, the first frequency-scaled filtering distance indicates that, based on one or more recorded positions of one or more access points (APs) being within the first frequency-scaled filtering distance from the TRP, the one or more recorded positions of the one or more APs are usable in the positioning procedure for the user device.

Inventors

• Pete Allen Boyer
• Joel Morrin

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20230920

Claims (20)

1. 1 . A method of operating a server device, the method comprising: obtaining a channel frequency of a channel of a transmission-reception point (TRP) of a first radio access technology (RAT), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel; and determining a first frequency-scaled filtering distance for the channel frequency by applying a frequency-scaled filtering distance model based on the channel frequency, a nominal frequency of the TRP, a first filtering distance associated with the nominal frequency, and a decay parameter of the TRP, wherein: the first frequency-scaled filtering distance indicates that, based on one or more first recorded positions of one or more first access points (APs) of a second RAT being within the first frequency-scaled filtering distance from the TRP, the one or more first recorded positions of the one or more first APs are usable in the positioning procedure for the user device.
2. 2 . The method of claim 1 , further comprising: determining a second frequency-scaled filtering distance for the channel frequency by applying the frequency-scaled filtering distance model based on the channel frequency, the nominal frequency of the TRP, a second filtering distance associated with the nominal frequency, and the decay parameter, wherein the second frequency-scaled filtering distance indicates that, based on absence of the one or more first APs and based on one or more second recorded positions of one or more second APs of the second RAT being within the second frequency-scaled filtering distance from the TRP, the one or more second recorded positions of the one or more second APs are usable in the positioning procedure for the user device.
3. 3 . The method of claim 2 , wherein the second filtering distance is 8 to 12 times the first filtering distance.
4. 4 . The method of claim 1 , wherein the frequency-scaled filtering distance model is based on an equation of: d = dn · ( fn / f ) ^ ( 2 / p ) , wherein f represents the channel frequency, fn represents the nominal frequency, where dn represents the first filtering distance associated with the nominal frequency, d represents the first frequency-scaled filtering distance, and p represents the decay parameter.
5. 5 . The method of claim 1 , further comprising: obtaining measurements of signals from the TRP; and determining a path loss model of the TRP based on the measurements of the signals from the TRP, wherein the decay parameter is based on the path loss model of the TRP.
6. 6 . The method of claim 5 , wherein the path loss model is based on an equation of: PL = C · F ^ 2 / D ^ p , wherein F represents a frequency of a modeled signal, D represents a distance from a modeled observation point to a source of the modeled signal, PL represents a power loss ratio of the modeled signal observable at the modeled observation point, and C represents a modeled constant.
7. 7 . The method of claim 1 , further comprising: receiving first data based on observations of the TRP of the first RAT; receiving second data based on observations of one or more third APs of the second RAT; receiving third data indicating one or more third recorded positions of the one or more third APs; and determining the first filtering distance based on the first data, the second data, the third data, or a combination thereof.
8. 8 . The method of claim 7 , further comprising: receiving fourth data indicating historical positioning errors associated with the one or more third APs, wherein the determining the first filtering distance is further based on the fourth data.
9. 9 . The method of claim 7 , wherein the one or more third recorded positions of the one or more third APs are at least in part based on crowd-sourced positioning of a portion or all of the one or more third APs.
10. 10 . The method of claim 1 , further comprising: receiving first data based on observations of the TRP of the first RAT; and determining the nominal frequency of the TRP based on: an average of observed channel frequencies identifiable based on the first data, a weighted average of the observed channel frequencies, a median of the observed channel frequencies, or a predetermined frequency assigned to the TRP.
11. 11 . The method of claim 1 , wherein: the first RAT is a cellular communication technology, and the second RAT is a wireless local area network technology.
12. 12 . The method of claim 11 , wherein: the first RAT is 5G NR, and the second RAT is Wi-Fi.
13. 13 . The method of claim 11 , wherein the one or more first APs are Wi-Fi APs.
14. 14 . The method of claim 1 , wherein the server device is a location server or an over-the-top server.
15. 15 . A server device, 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: obtain a channel frequency of a channel of a transmission-reception point (TRP) of a first radio access technology (RAT), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel; and determine a first frequency-scaled filtering distance for the channel frequency by applying a frequency-scaled filtering distance model based on the channel frequency, a nominal frequency of the TRP, a first filtering distance associated with the nominal frequency, and a decay parameter of the TRP, wherein: the first frequency-scaled filtering distance indicates that, based on one or more first recorded positions of one or more first access points (APs) of a second RAT being within the first frequency-scaled filtering distance from the TRP, the one or more first recorded positions of the one or more first APs are usable in the positioning procedure for the user device.
16. 16 . The server device of claim 15 , wherein the one or more processors, either alone or in combination, are further configured to: determine a second frequency-scaled filtering distance for the channel frequency by applying the frequency-scaled filtering distance model based on the channel frequency, the nominal frequency of the TRP, a second filtering distance associated with the nominal frequency, and the decay parameter, wherein the second frequency-scaled filtering distance indicates that, based on absence of the one or more first APs and based on one or more second recorded positions of one or more second APs of the second RAT being within the second frequency-scaled filtering distance from the TRP, the one or more second recorded positions of the one or more second APs are usable in the positioning procedure for the user device.
17. 17 . The server device of claim 15 , wherein the frequency-scaled filtering distance model is based on an equation of: d = dn · ( fn / f ) ^ ( 2 / p ) , wherein f represents the channel frequency, fn represents the nominal frequency, where dn represents the first filtering distance associated with the nominal frequency, d represents the first frequency-scaled filtering distance, and p represents the decay parameter.
18. 18 . The server device of claim 15 , wherein the one or more processors, either alone or in combination, are further configured to: obtain measurements of signals from the TRP; and determine a path loss model of the TRP based on the measurements of the signals from the TRP, wherein the decay parameter is based on the path loss model of the TRP.
19. 19 . The server device of claim 18 , wherein the path loss model is based on an equation of: PL = C · F ^ 2 / D ^ p , wherein F represents a frequency of a modeled signal, D represents a distance from a modeled observation point to a source of the modeled signal, PL represents a power loss ratio of the modeled signal observable at the modeled observation point, and C represents a modeled constant.
20. 20 . The server device of claim 15 , wherein: the first RAT is a cellular communication technology, and the second RAT is a wireless local area network technology.

Description

BACKGROUND OF THE DISCLOSURE 1. Field of the Disclosure Aspects of the disclosure relate generally to wireless technologies. 2. Description of the Related Art Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G), a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks), a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long Term Evolution (LTE) or WiMax). There are presently many different types of wireless communication systems in use, including cellular and personal communications service (PCS) systems. Examples of known cellular systems include the cellular analog advanced mobile phone system (AMPS), and digital cellular systems based on code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), the Global System for Mobile communications (GSM), etc. A fifth generation (5G) wireless standard, referred to as New Radio (NR), enables higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements. The 5G standard, according to the Next Generation Mobile Networks Alliance, is designed to provide higher data rates as compared to previous standards, more accurate positioning (e.g., based on reference signals for positioning (RS-P), such as downlink, uplink, or sidelink positioning reference signals (PRS)), and other technical enhancements. These enhancements, as well as the use of higher frequency bands, advances in PRS processes and technology, and high-density deployments for 5G, enable highly accurate 5G-based positioning. SUMMARY The following presents a simplified summary relating to one or more aspects disclosed herein. Thus, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be considered to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below. In an aspect, a method of operating a server device includes obtaining a channel frequency of a channel of a transmission-reception point (TRP) of a first radio access technology (RAT), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel; and determining a first frequency-scaled filtering distance for the channel frequency by applying a frequency-scaled filtering distance model based on the channel frequency, a nominal frequency of the TRP, a first filtering distance associated with the nominal frequency, and a decay parameter of the TRP, wherein: the first frequency-scaled filtering distance indicates that, based on one or more first recorded positions of one or more first access points (APs) of a second RAT being within the first frequency-scaled filtering distance from the TRP, the one or more first recorded positions of the one or more first APs are usable in the positioning procedure for the user device. In an aspect, a server device includes 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: obtain a channel frequency of a channel of a transmission-reception point (TRP) of a first radio access technology (RAT), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel; and determine a first frequency-scaled filtering distance for the channel frequency by applying a frequency-scaled filtering distance model based on the channel frequency, a nominal frequency of the TRP, a first filtering distance associated with the nominal frequency, and a decay parameter of the TRP, wherein: the first frequency-scaled filtering distance indicates that, based on one or more first recorded positions of one or more first access points (APs) of a second RAT being within the first frequency-scaled filtering distance from the TRP, the one or more first recorded positions of the one or more first APs are usable in the positioning procedure for the user device. In an aspect, a server device includes means for obtaining a channel frequency of a channel of a transmission-reception point (TRP) of a first radio access technology (RAT), a positioning procedure for a user device being performed based on one or more positioning reference signals from the TRP over the channel; and means for determining a first frequency-scaled filtering distance for