IP Library › Granted Patent US 12,206,525

Granted Patent B2

US 12,206,525 · App. 17/060,298 · Granted Jan 21, 2025

Sounding reference signal waveform design for wireless communications

Inventors: Jing Sun (San Diego, CA); Xiaoxia Zhang (San Diego, CA); Kapil Bhattad (Bangalore, IN); Tanumay Datta (Bangalore, IN)

Assignee: QUALCOMM Incorporated

H04L25/0226 H04L5/0007 H04L5/0048 H04L5/0051 H04L27/2605 H04L27/2613 H04W74/0808 H04L27/26132

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12,206,525
App. No.: 17/060,298
Granted: Jan 21, 2025
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

Techniques and devices for wireless communications are described that provide for staggering sounding reference signal (SRS) transmissions in frequency across multiple orthogonal frequency division multiplexing (OFDM) symbols, which may allow multiple UEs to transmit SRS using a common listen-before-talk (LBT) gap for a LBT procedure. The techniques also provide for transmitting an SRS across multiple OFDM symbols using same frequency resources, and an orthogonal cover code (OCC) may be applied to the SRS transmission of each OFDM symbol, which may allow multiple UEs to transmit concurrent SRS using a common LBT gap.

Claims (60)

1. A method for wireless communication at a user equipment (UE), comprising:

identifying a sounding reference signal configuration for transmission of a sounding reference signal to a base station, the sounding reference signal configuration providing sounding reference signal resources within at least a first orthogonal frequency division multiplexing symbol, a second orthogonal frequency division multiplexing symbol, a third orthogonal frequency division multiplexing symbol, and a fourth orthogonal frequency division multiplexing symbol, wherein the sounding reference signal configuration indicates a number of orthogonal frequency division multiplexing symbols across which the sounding reference signal is to be sent using different staggering offsets and an index that indicates a number of staggering offsets to be used on the number of orthogonal frequency division multiplexing symbols;

mapping, based at least in part on the sounding reference signal configuration, a first portion of the sounding reference signal to occupy a first subset of frequency resources of the first orthogonal frequency division multiplexing symbol, a second portion of the sounding reference signal to occupy a second subset of frequency resources of the second orthogonal frequency division multiplexing symbol, a third portion of the sounding reference signal to occupy a third subset of frequency resources of the third orthogonal frequency division multiplexing symbol, and a fourth portion of the sounding reference signal to occupy a fourth subset of frequency resources of the fourth orthogonal frequency division multiplexing symbol, wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are non-uniformly staggered in frequency relative to each other, wherein the first subset of frequency resources is offset by zero resource elements relative to a reference point, the second subset of frequency resources is offset by four resource elements relative to the reference point, the third subset of frequency resources is offset by two resource elements relative to the reference point, and the fourth subset of frequency resources is offset by six resource elements relative to the reference point; and

transmitting the sounding reference signal to the base station based at least in part on the mapping.

2. Method of claim 1 , wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are staggered from a single antenna port.

3. The method of claim 1 , wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources have an overlapping bandwidth span.

4. The method of claim 3 , wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are in a same set of physical resource blocks.

5. The method of claim 1 , wherein the mapping further comprises:

identifying the first subset of frequency resources as a first set of uniformly spaced resource elements within the first orthogonal frequency division multiplexing symbol, the second subset of frequency resources as a second set of uniformly spaced resource elements within the second orthogonal frequency division multiplexing symbol, the third subset of frequency resources as a third set of uniformly spaced resource elements within the third orthogonal frequency division multiplexing symbol, and the fourth subset of frequency resources as a fourth set of uniformly spaced resource elements within the fourth orthogonal frequency division multiplexing symbol.

6. The method of claim 5 , wherein the mapping further comprises:

identifying a first starting resource element within the first orthogonal frequency division multiplexing symbol based at least in part on a first resource element offset for the first orthogonal frequency division multiplexing symbol;

identifying a second starting resource element within the second orthogonal frequency division multiplexing symbol based at least in part on a second resource element offset for the second orthogonal frequency division multiplexing symbol;

identifying a third starting resource element within the third orthogonal frequency division multiplexing symbol based at least in part on a third resource element offset for the third orthogonal frequency division multiplexing symbol; and

identifying a fourth starting resource element within the fourth orthogonal frequency division multiplexing symbol based at least in part on a fourth resource element offset for the fourth orthogonal frequency division multiplexing symbol.

7. The method of claim 6 , wherein the first resource element offset, the second resource element offset, the third resource element offset, and the fourth resource element offset provide a uniform spacing of a combined set of resource elements that combines the first set of uniformly spaced resource elements, the second set of uniformly spaced resource elements, the third set of uniformly spaced resource elements, and the fourth set of uniformly spaced resource elements.

8. The method of claim 1 , further comprising:

determining a sounding reference signal sequence for each of the first portion of the sounding reference signal, the second portion of the sounding reference signal, the third portion of the sounding reference signal, and the fourth portion of the sounding reference signal based at least in part on an amount of frequency resources in each of the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources.

9. The method of claim 8 , wherein a same sounding reference signal sequence is determined for each of the first portion of the sounding reference signal, the second portion of the sounding reference signal, the third portion of the sounding reference signal, and the fourth portion of the sounding reference signal.

10. The method of claim 1 , wherein the first orthogonal frequency division multiplexing symbol, the second orthogonal frequency division multiplexing symbol, the third orthogonal frequency division multiplexing symbol, and the fourth orthogonal frequency division multiplexing symbol each include a plurality of resource blocks, and wherein each of the first portion of the sounding reference signal, the second portion of the sounding reference signal, the third portion of the sounding reference signal, and the fourth portion of the sounding reference signal occupy frequency resources according to a pattern that repeats every two or more resource blocks within each orthogonal frequency division multiplexing symbol.

11. The method of claim 1 , further comprising:

transmitting one or more repetitions of at least a portion of the sounding reference signal to the base station.

12. The method of claim 11 , wherein the one or more repetitions are transmitted in groups of sounding reference signal symbols, and wherein each group of sounding reference signal symbols is mapped according to the sounding reference signal configuration to provide associated portions of the sounding reference signal that are staggered in frequency.

13. The method of claim 11 , wherein the one or more repetitions of at least the portion of the sounding reference signal are transmitted to the base station according to a frequency hopping pattern.

14. The method of claim 13 , wherein the frequency hopping is performed in groups of sounding reference signal symbols, and wherein each group of sounding reference signal symbols is formatted according to the sounding reference signal configuration to provide associated portions of the sounding reference signal that are staggered in frequency.

15. A method for wireless communication at a base station, comprising:

configuring at least a first user equipment (UE) with a first sounding reference signal configuration for transmission of a first sounding reference signal, wherein the first sounding reference signal configuration provides resources for the first sounding reference signal within at least a first orthogonal frequency division multiplexing symbol, a second orthogonal frequency division multiplexing symbol, a third orthogonal frequency division multiplexing symbol, and a fourth orthogonal frequency division multiplexing symbol, wherein the first sounding reference signal configuration indicates a number of orthogonal frequency division multiplexing symbols across which the first sounding reference signal is to be sent using different staggering offsets and an index that indicates a number of staggering offsets to be used on the number of orthogonal frequency division multiplexing symbols; and

receiving, based at least in part on the first sounding reference signal configuration, a first portion of the first sounding reference signal in a first subset of frequency resources within the first orthogonal frequency division multiplexing symbol, a second portion of the first sounding reference signal in a second subset of frequency resources within the second orthogonal frequency division multiplexing symbol, a third portion of the first sounding reference signal in a third subset of frequency resources within the third orthogonal frequency division multiplexing symbol, and a fourth portion of the first sounding reference signal in a fourth subset of frequency resources within the fourth orthogonal frequency division multiplexing symbol, wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are non-uniformly staggered in frequency relative to each other, wherein the first subset of frequency resources is offset by zero resource elements relative to a reference point, the second subset of frequency resources is offset by four resource elements relative to the reference point, the third subset of frequency resources is offset by two resource elements relative to the reference point, and the fourth subset of frequency resources is offset by six resource elements relative to the reference point.

16. The method of claim 15 , further comprising:

configuring at least a second UE with a second sounding reference signal configuration for transmission of a second sounding reference signal, wherein the second sounding reference signal configuration provides resources for the second sounding reference signal within at least the first orthogonal frequency division multiplexing symbol, the second orthogonal frequency division multiplexing symbol, the third orthogonal frequency division multiplexing symbol, and the fourth orthogonal frequency division multiplexing symbol; and

receiving, based at least in part on the second sounding reference signal configuration, a first portion of the second sounding reference signal in a fifth subset of frequency resources within the first orthogonal frequency division multiplexing symbol, a second portion of the second sounding reference signal in a sixth subset of frequency resources within the second orthogonal frequency division multiplexing symbol, a third portion of the second sounding reference signal in a seventh subset of frequency resources within the third orthogonal frequency division multiplexing symbol, and a fourth portion of the second sounding reference signal in an eighth subset of frequency resources within the fourth orthogonal frequency division multiplexing symbol, wherein the fourth subset of frequency resources is staggered in frequency relative to the eighth subset of frequency resources.

17. The method of claim 16 , wherein the base station configures each of a plurality of UEs for sounding reference signal transmissions in the first orthogonal frequency division multiplexing symbol, the second orthogonal frequency division multiplexing symbol, the third orthogonal frequency division multiplexing symbol, and the fourth orthogonal frequency division multiplexing symbol based at least in part on a number of UEs in the plurality of UEs exceeding a threshold value.

18. The method of claim 15 , wherein the configuring at least the first UE further comprises:

configuring the first subset of frequency resources as a first set of uniformly spaced resource elements within the first orthogonal frequency division multiplexing symbol, the second subset of frequency resources as a second set of uniformly spaced resource elements within the second orthogonal frequency division multiplexing symbol, the third subset of frequency resources as a third set of uniformly spaced resource elements within the third orthogonal frequency division multiplexing symbol, and the fourth subset of frequency resources as a fourth set of uniformly spaced resource elements within the fourth orthogonal frequency division multiplexing symbol.

19. The method of claim 18 , wherein the configuring at least the first UE further comprises:

indicating a first resource element offset for the first orthogonal frequency division multiplexing symbol that provides resource element locations for the first set of uniformly spaced resource elements;

indicating a second resource element offset for the second orthogonal frequency division multiplexing symbol that provides resource element locations for the second set of uniformly spaced resource elements;

indicating a third resource element offset for the third orthogonal frequency division multiplexing symbol that provides resource element locations for the third set of uniformly spaced resource elements; and

indicating a fourth resource element offset for the fourth orthogonal frequency division multiplexing symbol that provides resource element locations for the fourth set of uniformly spaced resource elements.

20. The method of claim 19 , further comprising:

receiving the first set of uniformly spaced resource elements within the first orthogonal frequency division multiplexing symbol, the second set of uniformly spaced resource elements within the second orthogonal frequency division multiplexing symbol, the third set of uniformly spaced resource elements within the third orthogonal frequency division multiplexing symbol, and the fourth set of uniformly spaced resource elements within the fourth orthogonal frequency division multiplexing symbol, wherein the first resource element offset, the second resource element offset, the third resource element offset, and the fourth resource element offset provide a uniform spacing of a combined set of resource elements that combines the first set of uniformly spaced resource elements, the second set of uniformly spaced resource elements, the third set of uniformly spaced resource elements, and the fourth set of uniformly spaced resource elements.

21. The method of claim 15 , wherein the configuring at least the first UE further comprises:

configuring a sounding reference signal sequence for each of the first portion of the first sounding reference signal, the second portion of the first sounding reference signal, the third portion of the first sounding reference signal, and the fourth portion of the first sounding reference signal based at least in part on an amount of frequency resources in each of the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources.

22. The method of claim 21 , wherein a same sounding reference signal sequence is configured for each of the first portion of the first sounding reference signal, the second portion of the first sounding reference signal, the third portion of the first sounding reference signal, and the fourth portion of the first sounding reference signal.

23. The method of claim 15 , wherein the first orthogonal frequency division multiplexing symbol, the second orthogonal frequency division multiplexing symbol, the third orthogonal frequency division multiplexing symbol, and the fourth orthogonal frequency division multiplexing symbol each include a plurality of resource blocks, and wherein each of the first portion of the first sounding reference signal, the second portion of the first sounding reference signal, the third portion of the first sounding reference signal, and the fourth portion of the first sounding reference signal occupy uniform frequency resources that span two or more resource blocks within each orthogonal frequency division multiplexing symbol.

24. The method of claim 15 , further comprising:

receiving one or more repetitions of at least a portion of the first sounding reference signal from the first UE.

25. The method of claim 24 , wherein the one or more repetitions are received in groups of sounding reference signal symbols, and wherein each group of sounding reference signal symbols is mapped according to the first sounding reference signal configuration to provide associated portions of the first sounding reference signal that are staggered in frequency.

26. An apparatus for wireless communication at a user equipment (UE), comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a sounding reference signal configuration for transmission of a sounding reference signal to a base station, the sounding reference signal configuration providing sounding reference signal resources within at least a first orthogonal frequency division multiplexing symbol, a second orthogonal frequency division multiplexing symbol, a third orthogonal frequency division multiplexing symbol, and a fourth orthogonal frequency division multiplexing symbol, wherein the sounding reference signal configuration indicates a number of orthogonal frequency division multiplexing symbols across which the sounding reference signal is to be sent using different staggering offsets and an index that indicates a number of staggering offsets to be used on the number of orthogonal frequency division multiplexing symbols;

map, based at least in part on the sounding reference signal configuration, a first portion of the sounding reference signal to occupy a first subset of frequency resources of the first orthogonal frequency division multiplexing symbol, a second portion of the sounding reference signal to occupy a second subset of frequency resources of the second orthogonal frequency division multiplexing symbol, a third portion of the sounding reference signal to occupy a third subset of frequency resources of the third orthogonal frequency division multiplexing symbol, and a fourth portion of the sounding reference signal to occupy a fourth subset of frequency resources of the fourth orthogonal frequency division multiplexing symbol, wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are non-uniformly staggered in frequency relative to each other, wherein the first subset of frequency resources is offset by zero resource elements relative to a reference point, the second subset of frequency resources is offset by four resource elements relative to the reference point, the third subset of frequency resources is offset by two resource elements relative to the reference point, and the fourth subset of frequency resources is offset by six resource elements relative to the reference point; and

transmit the sounding reference signal to the base station based at least in part on the mapping.

27. An apparatus for wireless communication at a base station, comprising:

a processor,

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

configure at least a first user equipment (UE) with a first sounding reference signal configuration for transmission of a first sounding reference signal, wherein the first sounding reference signal configuration provides resources for the first sounding reference signal within at least a first orthogonal frequency division multiplexing symbol, a second orthogonal frequency division multiplexing symbol, a third orthogonal frequency division multiplexing symbol, and a fourth orthogonal frequency division multiplexing symbol, wherein the first sounding reference signal configuration indicates a number of orthogonal frequency division multiplexing symbols across which the first sounding reference signal is to be sent using different staggering offsets and an index that indicates a number of staggering offsets to be used on the number of orthogonal frequency division multiplexing symbols; and

receive, based at least in part on the first sounding reference signal configuration, a first portion of the first sounding reference signal in a first subset of frequency resources within the first orthogonal frequency division multiplexing symbol, a second portion of the first sounding reference signal in a second subset of frequency resources within the second orthogonal frequency division multiplexing symbol, a third portion of the first sounding reference signal in a third subset of frequency resources within the third orthogonal frequency division multiplexing symbol, and a fourth portion of the first sounding reference signal in a fourth subset of frequency resources within the fourth orthogonal frequency division multiplexing symbol, wherein the first subset of frequency resources, the second subset of frequency resources, the third subset of frequency resources, and the fourth subset of frequency resources are non-uniformly staggered in frequency relative to each other, wherein the first subset of frequency resources is offset by zero resource elements relative to a reference point, the second subset of frequency resources is offset by four resource elements relative to the reference point, the third subset of frequency resources is offset by two resource elements relative to the reference point, and the fourth subset of frequency resources is offset by six resource elements relative to the reference point.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2020

From: SUN, JING; ZHANG, XIAOXIA; BHATTAD, KAPIL; DATTA, TANUMAY

To: QUALCOMM INCORPORATED

Reel/Frame 053944/0814 →

Priority Claims (1)

IN 201941012233 · Mar 28, 2019 · national

Continuity (2)

Continuation 16828368 · Mar 24, 2020

Related Publication 20210021447A1 · Jan 21, 2021

References Cited (226)

US 7542504B2 · Chang et al. · 2009 [cited by applicant]

US 8000273B2 · He et al. · 2011 [cited by applicant]

US 8254329B2 · Ko et al. · 2012 [cited by applicant]

US 8254344B2 · Akita et al. · 2012 [cited by applicant]

US 8428157B2 · Kakura et al. · 2013 [cited by applicant]

US 8654727B2 · Dai et al. · 2014 [cited by applicant]

US 8675752B2 · Lahtonen et al. · 2014 [cited by applicant]

US 8718001B2 · Zhang et al. · 2014 [cited by applicant]

US 8750870B2 · Palanki et al. · 2014 [cited by applicant]

US 8855068B2 · Qin et al. · 2014 [cited by applicant]

US 9036538B2 · Palanki · 2015 [cited by applicant]

US 9326283B2 · Shin et al. · 2016 [cited by applicant]

US 9369250B2 · Liu · 2016 [cited by applicant]

US 9651653B2 · Fischer et al. · 2017 [cited by applicant]

US 9755712B1 · Bultan · 2017 [cited by examiner]

US 9763251B2 · Papasakellariou et al. · 2017 [cited by applicant]

US 9794039B2 · Kwak et al. · 2017 [cited by applicant]

US 9814015B2 · Xiao et al. · 2017 [cited by applicant]

US 9913239B2 · Tinnakornsrisuphap et al. · 2018 [cited by applicant]

US 10021667B2 · Akkarakaran et al. · 2018 [cited by applicant]

US 10171210B2 · Gong et al. · 2019 [cited by applicant]

US 10333670B2 · Rico Alvarino et al. · 2019 [cited by applicant]

US 10716084B2 · Wang et al. · 2020 [cited by applicant]

US 10736074B2 · Edge et al. · 2020 [cited by applicant]

US 11350437B2 · Xiong et al. · 2022 [cited by applicant]

US 20030215035A1 · Amerga et al. · 2003 [cited by applicant]

US 20050271012A1 · Agrawal et al. · 2005 [cited by applicant]

US 20060128416A1 · Linebarger et al. · 2006 [cited by applicant]

US 20070002813A1 · Tenny et al. · 2007 [cited by applicant]

US 20100130230A1 · Aggarwal et al. · 2010 [cited by applicant]

US 20110003551A1 · Kameno et al. · 2011 [cited by applicant]

US 20120021758A1 · Gum et al. · 2012 [cited by applicant]

US 20120231809A1 · Siomina et al. · 2012 [cited by applicant]

US 20120252487A1 · Siomina et al. · 2012 [cited by applicant]

US 20120287882A1 · Kim et al. · 2012 [cited by applicant]

US 20130029669A1 · Boudreau et al. · 2013 [cited by applicant]

US 20130165052A1 · Chuang · 2013 [cited by applicant]

US 20130265962A1 · Ouchi · 2013 [cited by examiner]

US 20130324154A1 · Raghupathy et al. · 2013 [cited by applicant]

US 20140073356A1 · Siomina et al. · 2014 [cited by applicant]

US 20140349582A1 · Xiao et al. · 2014 [cited by applicant]

US 20150018010A1 · Fischer · 2015 [cited by applicant]

US 20150063228A1 · Aldana · 2015 [cited by applicant]

US 20150118678A1 · Mandecki et al. · 2015 [cited by applicant]

US 20150124673A1 · Ouchi et al. · 2015 [cited by applicant]

US 20150133173A1 · Edge et al. · 2015 [cited by applicant]

US 20150188678A1 · Wu et al. · 2015 [cited by applicant]

US 20150263837A1 · Patel et al. · 2015 [cited by applicant]

US 20150289311A1 · Chang et al. · 2015 [cited by applicant]

US 20150382205A1 · Lee et al. · 2015 [cited by applicant]

US 20160065342A1 · Mirbagheri et al. · 2016 [cited by applicant]

US 20160094326A1 · Moon · 2016 [cited by examiner]

US 20160095105A1 · Chen et al. · 2016 [cited by applicant]

US 20160165458A1 · Peng · 2016 [cited by examiner]

US 20160192385A1 · Tooher · 2016 [cited by examiner]

US 20160226647A1 · Wang et al. · 2016 [cited by applicant]

US 20170026794A1 · Baker et al. · 2017 [cited by applicant]

US 20170104517A1 · Kakishima et al. · 2017 [cited by applicant]

US 20170111880A1 · Park et al. · 2017 [cited by applicant]

US 20170164315A1 · Smith · 2017 [cited by applicant]

US 20170180194A1 · Noh et al. · 2017 [cited by applicant]

US 20170201960A1 · Park et al. · 2017 [cited by applicant]

US 20170238298A1 · Wang et al. · 2017 [cited by applicant]

US 20170251497A1 · Larsson et al. · 2017 [cited by applicant]

US 20170288830A1 · Fischer · 2017 [cited by applicant]

US 20170324455A1 · Soriaga et al. · 2017 [cited by applicant]

US 20180006787A1 · Chen et al. · 2018 [cited by applicant]

US 20180020423A1 · Wang et al. · 2018 [cited by applicant]

US 20180049151A1 · Yoon et al. · 2018 [cited by applicant]

US 20180097596A1 · Palanivelu et al. · 2018 [cited by applicant]

US 20180098314A1 · Rico Alvarino et al. · 2018 [cited by applicant]

US 20180124787A1 · Wang et al. · 2018 [cited by applicant]

US 20180192404A1 · Maaref et al. · 2018 [cited by applicant]

US 20180198509A1 · Nilsson et al. · 2018 [cited by applicant]

US 20180217228A1 · Edge et al. · 2018 [cited by applicant]

US 20180287682A1 · Kwak et al. · 2018 [cited by applicant]

US 20180295590A1 · Abedini et al. · 2018 [cited by applicant]

US 20180324771A1 · Hosseini et al. · 2018 [cited by applicant]

US 20180375710A1 · Chae · 2018 [cited by applicant]

US 20190007152A1 · Yi et al. · 2019 [cited by applicant]

US 20190013909A1 · Li et al. · 2019 [cited by applicant]

US 20190020454A1 · Kim et al. · 2019 [cited by applicant]

US 20190052443A1 · Cheng et al. · 2019 [cited by applicant]

US 20190053287A1 · Lin et al. · 2019 [cited by applicant]

US 20190068315A1 · Ryden et al. · 2019 [cited by applicant]

US 20190068346A1 · Akkarakaran et al. · 2019 [cited by applicant]

US 20190081660A1 · Han et al. · 2019 [cited by applicant]

US 20190159182A1 · Ranta-Aho et al. · 2019 [cited by applicant]

US 20190165913A1 · He et al. · 2019 [cited by applicant]

US 20190166514A1 · Liu · 2019 [cited by examiner]

US 20190174440A1 · Kwak et al. · 2019 [cited by applicant]

US 20190174454A1 · Priyanto et al. · 2019 [cited by applicant]

US 20190178976A1 · Xiong et al. · 2019 [cited by applicant]

US 20190182899A1 · Ye · 2019 [cited by examiner]

US 20190190669A1 · Park et al. · 2019 [cited by applicant]

US 20190273587A1 · Takeda et al. · 2019 [cited by applicant]

US 20190285722A1 · Markhovsky et al. · 2019 [cited by applicant]

US 20190349898A1 · Fu et al. · 2019 [cited by applicant]

US 20200036556A1 · Wei et al. · 2020 [cited by applicant]

US 20200052845A1 · Chuang et al. · 2020 [cited by applicant]

US 20200091608A1 · Alpman et al. · 2020 [cited by applicant]

US 20200178202A1 · Edge et al. · 2020 [cited by applicant]

US 20200213161A1 · Zhang et al. · 2020 [cited by applicant]

US 20200220676A1 · Xu et al. · 2020 [cited by applicant]

US 20200235877A1 · Manolakos et al. · 2020 [cited by applicant]

US 20200267718A1 · Park et al. · 2020 [cited by applicant]

US 20200275416A1 · Haghighat et al. · 2020 [cited by applicant]

US 20200288482A1 · Yi et al. · 2020 [cited by applicant]

US 20200296716A1 · Lin · 2020 [cited by examiner]

US 20200313732A1 · Yang et al. · 2020 [cited by applicant]

US 20200313932A1 · Sun et al. · 2020 [cited by applicant]

US 20200336264A1 · Faxer et al. · 2020 [cited by applicant]

US 20200351045A1 · Manolakos · 2020 [cited by applicant]

US 20200351818A1 · Park et al. · 2020 [cited by applicant]

US 20210006372A1 · Cha et al. · 2021 [cited by applicant]

US 20210036825A1 · Choi et al. · 2021 [cited by applicant]

US 20210070451A1 · Manolakos et al. · 2021 [cited by applicant]

US 20210083827A1 · Bao et al. · 2021 [cited by applicant]

US 20210105812A1 · Rastegardoost et al. · 2021 [cited by applicant]

US 20210120522A1 · Kim et al. · 2021 [cited by applicant]

US 20210144743A1 · Rastegardoost et al. · 2021 [cited by applicant]

US 20210167924A1 · Bao · 2021 [cited by applicant]

US 20210176687A1 · Ko · 2021 [cited by examiner]

US 20210195620A1 · Koshimura et al. · 2021 [cited by applicant]

US 20210211957A1 · Kamohara · 2021 [cited by examiner]

US 20210227509A1 · Zhang · 2021 [cited by applicant]

US 20210311158A1 · Akkarakaran et al. · 2021 [cited by applicant]

US 20210351887A1 · Qi · 2021 [cited by applicant]

US 20220095304A1 · Muruganathan · 2022 [cited by examiner]

US 20220132620A1 · Yoshimura · 2022 [cited by examiner]

US 20220377701A1 · Edge et al. · 2022 [cited by applicant]

US 20230080106A1 · Ji et al. · 2023 [cited by applicant]

US 20240023059A1 · Edge et al. · 2024 [cited by applicant]

US 20240113828A1 · Manolakos et al. · 2024 [cited by applicant]

CN 102422663A · 2012 [cited by applicant]

CN 102461292A · 2012 [cited by applicant]

CN 103004267A · 2013 [cited by applicant]

CN 103703814A · 2014 [cited by applicant]

CN 103944685A · 2014 [cited by applicant]

CN 104488345A · 2015 [cited by applicant]

CN 104885554A · 2015 [cited by applicant]

CN 105164930A · 2015 [cited by applicant]

CN 106105073A · 2016 [cited by applicant]

CN 106341882A · 2017 [cited by applicant]

CN 107733549A · 2018 [cited by applicant]

CN 107733563A · 2018 [cited by applicant]

EP 2418887A2 · 2012 [cited by applicant]

EP 2663144A2 · 2013 [cited by applicant]

EP 3041301A1 · 2016 [cited by applicant]

EP 3306337A1 · 2018 [cited by applicant]

EP 3490319A1 · 2019 [cited by applicant]

JP H07111675A · 1995 [cited by applicant]

JP 2012523738A · 2012 [cited by applicant]

JP 2012525724A · 2012 [cited by applicant]

JP 2014216951A · 2014 [cited by applicant]

JP 2016508217A · 2016 [cited by applicant]

JP 2017098960A · 2017 [cited by applicant]

KR 20170030773A · 2017 [cited by applicant]

TW 201828624A · 2018 [cited by applicant]

WO WO2007022715A1 · 2007 [cited by applicant]

WO WO2009096319A1 · 2009 [cited by applicant]

WO WO2010059940A1 · 2010 [cited by applicant]

WO WO2011085267A2 · 2011 [cited by applicant]

WO WO2011139201A1 · 2011 [cited by applicant]

WO 2013112972A1 · 2013 [cited by applicant]

WO WO2013134724A1 · 2013 [cited by applicant]

WO WO2014105324A1 · 2014 [cited by applicant]

WO WO2014131349A1 · 2014 [cited by applicant]

WO WO2015027118A1 · 2015 [cited by applicant]

WO 2016036840A1 · 2016 [cited by applicant]

WO WO2016065368A1 · 2016 [cited by applicant]

WO WO2016122757A1 · 2016 [cited by applicant]

WO WO2016155810A1 · 2016 [cited by applicant]

WO WO2016164085A1 · 2016 [cited by applicant]

WO 2017040075A1 · 2017 [cited by applicant]

WO WO2017048064A1 · 2017 [cited by applicant]

WO WO2017126907A1 · 2017 [cited by applicant]

WO WO2017200708A1 · 2017 [cited by applicant]

WO WO2018013672A1 · 2018 [cited by applicant]

WO WO2018085145A1 · 2018 [cited by applicant]

WO 2018127137A1 · 2018 [cited by applicant]

WO WO2018126356A1 · 2018 [cited by applicant]

WO WO2018128401A1 · 2018 [cited by applicant]

WO WO2019000180A1 · 2019 [cited by applicant]

WO WO2019047776A1 · 2019 [cited by applicant]

WO WO2019212246A1 · 2019 [cited by applicant]

WO WO2020001380A1 · 2020 [cited by applicant]

WO WO2020145873A1 · 2020 [cited by applicant]

WO WO2021071570A1 · 2021 [cited by applicant]

“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical Layer Procedures for Data (Release 16)”, 3GPP Standard, Technical Specification, 3GPP TS 38.214, 3rd Generation Partn… [cited by applicant]

Specification of U.S. Appl. No. 62/726,480, filed Sep. 4, 2018, 28 Pages. [cited by applicant]

Specification of U.S. Appl. No. 62/740,459, filed Oct. 3, 2018, 12 Pages. [cited by applicant]

Ericsson: “RAT Dependent NR Positioning solutions”, GPP Draft, 3GPP TSG-RAN WG1 #95, R1-1813592, RAT Dependent NR Positioning Solutions, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Route De… [cited by applicant]

Keating R., et al., “Overview of Positioning in 5G New Radio”, 2019 16th International Symposium on Wireless Communication Systems (ISWCS), IEEE, Aug. 27, 2019 (Aug. 27, 2019), pp. 320-324. XP033636268, DOI: 10.1109/ISW… [cited by applicant]

3GPP Ts 38.211 version 15.2.0 Release 15, 2018, 98 pages. [cited by applicant]

CATT: “DL Reference Signals for NR Positioning”, 3GPP TSG RAN WG1 #97, R1-1906305, Reno, USA, May 13-17, 2019, pp. 1-17. [cited by applicant]

Ericsson: “Downlink Positioning Solutions: Design and Evaluations”, 3GPP Draft, 3GPP TSG RAN WG1 #96, R1-1903139 DL Positioning Solutions, , 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Rout… [cited by applicant]

Ericsson: “Uplink Positioning Solutions: Design and Evaluations”, 3GPP Draft, 3GPP TSG RAN WG1 #96, R1-1903140 UL Positioning Solutions, , 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Route … [cited by applicant]

Fischer S., “Observed Time Difference of Arrival (OTDOA) Positioning in 3GPP LTE”, Qualcomm Technologies Inc, Jun. 6, 2014 (Jun. 6, 2014), pp. 1-62, XP055284784, Retrieved from the Internet: URL: http://www.terranautx.c… [cited by applicant]

Huawei, et al., “Downlink Based Solutions for NR Positioning”, 3GPP Draft, R1-1900036, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Route Des Lucioles, F-06921 Sophia-Antipolis Cedex, France… [cited by applicant]

Indian Patent Application No. 201941012233, filed Mar. 28, 2019, 102 pages. [cited by applicant]

Intel Corporation: “DL Reference Signals for NR Positioning”, 3GPP Draft; R1-1908659 Intel—NRPOS DLRS, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Route Des Lucioles, F-06921 Sophia-Antipol… [cited by applicant]

Intel Corporation: “Offline Discussion Outcome on DL Reference Signals for NR”, 3GPP TSG RAN WG1 Meeting #96bis, R1-1905847, Xi'an, China, Apr. 8-12, 2019, pp. 1-12. [cited by applicant]

International Search Report and Written Opinion—PCT/US2020/024617—ISA/EPO—dated Jun. 24, 2020. [cited by applicant]

LG Electronics: “Discussion on Potential Enhancements for Indoor Positioning”, 3GPP Draft, R1-150229 Discussion on potential enhancements for indoor positioning, 3rd Generation Partnership Project (3GPP), vol. RAN WG1, … [cited by applicant]

Media Tek Inc: “Views on Potential Positioning Techniques”, R1-1812373, 3GPP TSG-RAN WG1 Meeting #95, Spokane, USA, Nov. 12-Nov. 16, 2018, Date of Publication: Nov. 3, 2018, 6 Pages, http://www.3gpp.Org/Ftp/Tsg_ran/WG1_… [cited by applicant]

Mediatek Inc: “On Downlink OTDOA and Angle based techniques”, 3GPP TSG-RAN WG1 #96 Meeting, R1-1903239, Athens, Greece, Feb. 25-Mar. 1, 2019, 8 Pages. [cited by applicant]

Mediatek Inc: “On downlink OTDOA Technique: Potential Reference Signal Design”, 3GPP Draft, 3GPP TSG-RAN WG1 Ad-Hoc Meeting 1901, R1-1900203 On downlink OTDOA Technique_Final, 3rd Generation Partnership Project (3GPP), … [cited by applicant]

Mediatek Inc: “Reference Signal Design for NR Positioning”, 3GPP Draft, 3GPP TSG-RAN WG1 #96bis Meeting, R1-1904500 DL RS Design_Final, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre , 650, Route De… [cited by applicant]

NEXTNAV: “Synchronization for OTDOA Simulations”, R1-150691,3 GPP TSG RAN WG1 Meeting #80, Athens, Greece, Feb. 9-13, 2015, 3 Pages. [cited by applicant]

Nokia, et al., “Views on DL and UL Reference Signals for NR Positioning”, 3GPP Draft, 3GPP TSG RAN WG1 #96bis, R1-1905262 RS for NR Positioning, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, … [cited by applicant]

Shin et al., “Sounding Reference Signal Measurement in LTE System”, 18th International Conference on Advanced Communication Technology (ICACT), Mar. 3, 2016, pp. 755-758, https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&… [cited by applicant]

White Paper: “An overview of LTE Positioning”, Feb. 2012, SPIRENT, 16 Pages. [cited by applicant]

ETSI TS 138 211 V16.2.0, “Physical Channels and Modulation”, 5G, NR, 3GPP TS 38.211, version 16.2.0, Release, Jul. 16, 2020, pp. 1-135. [cited by applicant]

VIVO: “Discussion on DL RS for NR Positioning”, R1-1908174, 3GPP TSG RAN WG1 #98, Prague, CZ, Aug. 26-30, 2019, 13 Pages. [cited by applicant]

Ericsson: “RAT Dependent NR Positioning Solutions”, [Online] 3GPP TSG-RAN WG1 #95, R1-1813592, RAT Dependent NR Positioning Solutions, 3rd Generation Partnership Project, Mobile Competence Centre, 650, Route Des Luciole… [cited by applicant]

Ericsson: “DL Reference Signals for NR Positioning”, 3GPP TSG RAN WG1 Meeting #97, R1-1907508, Reno, NV, USA, May 13-17, 2019, 27 Pages. [cited by applicant]

Taiwan Search Report—TW109110003—TIPO—Jul. 25, 2023. [cited by applicant]

Ericsson, “Dl Reference Signals for NR Positioning”, R1-1909424, 3GPP TSG-RAN WG1 Meeting #98, Prague, CZ, Aug. 26-30, 2019 (Year: 2019), 28 Pages. [cited by applicant]

Intel Corporation: “Design of Downlink Reference Signals for NR Positioning”, 3GPP TSG RAN WG1 Meeting #97, R1-1906821, Reno, USA, May 13-17, 2019, pp. 1-17. [cited by applicant]

Xinwei: “Discussion on Indoor Positioning Enhancement Aided by EB/FD-MIMO”, R1-154700, 3rd Generation Partnership Project (3GPP), Mobile Competence Centre, 650, Route Des Lucioles, F-06921 Sophia-Antipolis Cedex, France… [cited by applicant]

Ericsson: “DL and UL Reference Signals for NR Positioning”, 3GPP TSG RAN WG1 96, R1-1905461, Xi'an, P.R. China, Apr. 8, 2019-Apr. 12, 2019, Apr. 3, 2019, pp. 1-15. [cited by applicant]

U.S. Appl. No. 62/740,459, Chiao-Yao; Chuang et al. [cited by applicant]

SONY: “Discussion on OTDOA NR Positioning”, 3GPP TSG RAN WG2 Meeting #104, R2-1817081, Spokane, USA, Nov. 12-16, 2018, 3 pages. [cited by applicant]

Ericsson: “DFT size for Uplink Transmissions”, 3GPP TSG-RAN WG1 #47, R1-063127, Riga, Latvia, Nov. 6, 2006-Nov. 10, 2006, 2 Pages, Nov. 1, 2006. [cited by applicant]