TWI799591B - 用於利用波束成形通訊的無線網路的定位方法 - Google Patents

用於利用波束成形通訊的無線網路的定位方法 Download PDF

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Publication number
TWI799591B
TWI799591B TW108118924A TW108118924A TWI799591B TW I799591 B TWI799591 B TW I799591B TW 108118924 A TW108118924 A TW 108118924A TW 108118924 A TW108118924 A TW 108118924A TW I799591 B TWI799591 B TW I799591B
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TW
Taiwan
Prior art keywords
wireless networks
positioning methods
beamformed communication
utilize
utilize beamformed
Prior art date
Application number
TW108118924A
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English (en)
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TW202005308A (zh
Inventor
索尼 阿卡拉力南
濤 駱
奧茲格 柯曼
南宇碩
山缪 賽萊比
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美商高通公司
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Publication of TW202005308A publication Critical patent/TW202005308A/zh
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Publication of TWI799591B publication Critical patent/TWI799591B/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • G01S5/0221Receivers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/04Details
    • G01S1/042Transmitters
    • G01S1/0428Signal details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08Systems for determining direction or position line
    • G01S1/20Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • G01S5/0218Multipath in signal reception
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • G01S5/0236Assistance data, e.g. base station almanac
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/10Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/28Cell structures using beam steering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/06Airborne or Satellite Networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/085Access point devices with remote components

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Astronomy & Astrophysics (AREA)
  • Mobile Radio Communication Systems (AREA)
TW108118924A 2018-05-31 2019-05-31 用於利用波束成形通訊的無線網路的定位方法 TWI799591B (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201862679006P 2018-05-31 2018-05-31
US62/679,006 2018-05-31
US16/426,952 US11442135B2 (en) 2018-05-31 2019-05-30 Positioning methods for wireless networks that utilize beamformed communication
US16/426,952 2019-05-30

Publications (2)

Publication Number Publication Date
TW202005308A TW202005308A (zh) 2020-01-16
TWI799591B true TWI799591B (zh) 2023-04-21

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
TW108118924A TWI799591B (zh) 2018-05-31 2019-05-31 用於利用波束成形通訊的無線網路的定位方法
TW112110812A TW202333468A (zh) 2018-05-31 2019-05-31 用於利用波束成形通訊的無線網路的定位方法

Family Applications After (1)

Application Number Title Priority Date Filing Date
TW112110812A TW202333468A (zh) 2018-05-31 2019-05-31 用於利用波束成形通訊的無線網路的定位方法

Country Status (6)

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US (2) US11442135B2 (zh)
EP (1) EP3804426A1 (zh)
KR (1) KR20210014683A (zh)
CN (1) CN112205040B (zh)
TW (2) TWI799591B (zh)
WO (1) WO2019232456A1 (zh)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10627474B1 (en) * 2016-07-10 2020-04-21 ZaiNar, Inc. Method and system for radiofrequency localization of transmitting devices via a mesh network
US11686805B1 (en) 2016-07-10 2023-06-27 ZaiNar, Inc. Method and system for radiofrequency localization of transmitting devices via a mesh network
US10652826B2 (en) * 2018-03-23 2020-05-12 Samsung Electronics Co., Ltd. Method and apparatus for power saving signal design in NR
US10911211B1 (en) 2018-09-28 2021-02-02 ZaiNar, Inc. Frequency and gain calibration for time synchronization in a network
US10833840B2 (en) 2018-05-07 2020-11-10 ZaiNar, Inc. Methods for nanosecond-scale time synchronization over a network
US11658798B1 (en) 2018-05-07 2023-05-23 ZaiNar, Inc. Methods for time synchronization and localization in a mesh network
US11442135B2 (en) 2018-05-31 2022-09-13 Qualcomm Incorporated Positioning methods for wireless networks that utilize beamformed communication
CN110690950B (zh) * 2018-07-06 2020-08-11 维沃移动通信有限公司 定位参考信号配置、接收方法和设备
KR20210054016A (ko) * 2018-09-28 2021-05-12 삼성전자주식회사 통신 시스템에서 각도기반 포지셔닝 및 측정과 관련된 개선안
US11412400B2 (en) * 2018-10-01 2022-08-09 Nokia Technologies Oy Method for positioning reference design
US10972172B2 (en) * 2018-10-05 2021-04-06 Arizona Board Of Regents On Behalf Of The University Of Arizona Method for fast beam sweeping and device discovery in 5G millimeter wave and upper centimeter-wave systems
CN113438062B (zh) * 2018-10-22 2023-06-02 成都华为技术有限公司 一种确定参考信号的测量值的方法及装置
GB2583691B (en) 2019-02-15 2021-11-03 Samsung Electronics Co Ltd Methods, apparatus, and systems for transmitting and receiving positioning reference signals in 5G new radio networks
US11510215B2 (en) * 2019-03-28 2022-11-22 Mediatek Inc. Electronic device and method for radio resource management (RRM) measurement relaxation
DE102019206466A1 (de) * 2019-05-06 2020-11-12 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines drahtlosen Kommunikationsnetzwerks
US11234245B1 (en) * 2019-08-21 2022-01-25 T-Mobile Innovations Llc Beamforming in massive MIMO networks
US11350293B2 (en) * 2019-11-26 2022-05-31 Huawei Technologies Co., Ltd. Systems and methods for estimating locations of signal shadowing obstructions and signal reflectors in a wireless communications network
US11637610B2 (en) * 2019-12-13 2023-04-25 Qualcomm Incorporated Techniques for spatial relation indication based on beam orientation
WO2021128233A1 (en) * 2019-12-27 2021-07-01 Qualcomm Incorporated Directional synchronization and system information acquisition
WO2021159296A1 (en) 2020-02-12 2021-08-19 Apple Inc. RSTD Measurement Report Mapping for NR Positioning
JP7425886B2 (ja) * 2020-02-13 2024-01-31 ノキア ソリューションズ アンド ネットワークス オサケユキチュア リソース要素に関する処理ルール
KR20220150444A (ko) * 2020-04-27 2022-11-10 엘지전자 주식회사 무선 통신 시스템에서 빔포밍된 신호를 이용하여 측위를 수행하기 위한 방법 및 장치
US11622270B2 (en) * 2020-05-20 2023-04-04 The Government Of The United States Of America, As Represented By The Secretary Of The Navy Method and apparatus for millimeter-wave physical layer authentication
US11792666B2 (en) * 2020-06-04 2023-10-17 Qualcomm Incorporated Location assistance data for wideband positioning
US11653400B2 (en) * 2020-06-16 2023-05-16 Blu Wireless Technology Limited Wireless communication for vehicle based node
US20220026550A1 (en) * 2020-07-23 2022-01-27 Qualcomm Incorporated Beam management for bistatic air interface based radio frequency sensing in millimeter wave systems
US11953578B2 (en) 2020-07-23 2024-04-09 Qualcomm Incorporated Single sided beam management for bistatic air interface based radio frequency sensing in millimeter wave systems
EP4169294A4 (en) * 2020-08-13 2023-07-19 Apple Inc. COORDINATED CELLULAR COVERAGE BY MOBILE BASE STATIONS
US11172019B1 (en) * 2020-08-28 2021-11-09 Tencent America LLC Systems and methods for unmanned aerial system communication
US20230388889A1 (en) * 2020-10-14 2023-11-30 Telefonaktiebolaget Lm Ericsson (Publ) Method and Apparatus for Communication Management
US11411612B2 (en) * 2020-11-16 2022-08-09 Ultralogic 6G, Llc Location-based beamforming for rapid 5G and 6G directional messaging
CN114828205A (zh) * 2021-01-18 2022-07-29 大唐移动通信设备有限公司 终端定位方法及设备
US20230379666A1 (en) 2022-04-20 2023-11-23 ZaiNar, Inc. System and methods for asset tracking, asset grouping, and error recovery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170366244A1 (en) * 2014-12-16 2017-12-21 Lg Electronics Inc. Method for receiving reference signal in wireless communication system, and apparatus therefor
US20180054286A1 (en) * 2015-04-08 2018-02-22 Intel IP Corporation Positioning reference system (prs) design enhancement
WO2018069208A1 (en) * 2016-10-10 2018-04-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. User equipment localization in a mobile communication network

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1753550A (zh) 2004-09-20 2006-03-29 北京三星通信技术研究有限公司 利用波束成形增强定位信号发送的方法及设备
JP4730565B2 (ja) 2008-07-17 2011-07-20 日本電気株式会社 無線通信システム、管理サーバ、および移動基地局制御方法
US9559884B2 (en) 2011-02-07 2017-01-31 Intel Corporation Co-phasing of transmissions from multiple infrastructure nodes
EP2724577A1 (en) 2011-06-21 2014-04-30 Telefonaktiebolaget LM Ericsson (PUBL) Methods and apparatuses for accounting of cell change information
WO2013125993A1 (en) 2012-02-22 2013-08-29 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for determining a beam parameter of an antenna in a wireless communications system
US9859972B2 (en) 2014-02-17 2018-01-02 Ubiqomm Llc Broadband access to mobile platforms using drone/UAV background
US10557919B2 (en) 2014-03-28 2020-02-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Observed time difference of arrival angle of arrival discriminator
EP2938117B1 (en) 2014-04-24 2017-12-27 Alcatel Lucent Adjusting geographical position of a drone base station
KR20170049494A (ko) 2014-08-27 2017-05-10 엘지전자 주식회사 무선 통신 시스템에서 참조 신호 수신 방법 및 이를 위한 장치
WO2016032308A1 (ko) 2014-08-29 2016-03-03 엘지전자 주식회사 무선 통신 시스템에서 otdoa 관련 동작 수행 방법
US9913095B2 (en) * 2014-11-19 2018-03-06 Parallel Wireless, Inc. Enhanced mobile base station
WO2016086144A1 (en) * 2014-11-26 2016-06-02 Interdigital Patent Holdings, Inc. Initial access in high frequency wireless systems
KR102541174B1 (ko) * 2015-03-26 2023-06-08 엘지전자 주식회사 무선 통신 시스템에서 위치 결정을 위한 측정 결과 보고 방법 및 이를 위한 장치
WO2016155810A1 (en) 2015-03-31 2016-10-06 Sony Corporation Method and apparatus for positioning a mobile terminal in a radio network
US10530542B2 (en) 2015-04-07 2020-01-07 Telefonaktiebolaget L M Ericsson (Publ) Transmitting positioning reference signals
WO2016163770A1 (ko) 2015-04-08 2016-10-13 엘지전자 주식회사 무선 통신 시스템에서 위치 결정을 위한 참조 신호 측정, 또는 위치 결정을 위한 방법 및 이를 위한 장치
US10390324B2 (en) 2015-05-25 2019-08-20 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive measurement report mapping for UE positioning
CN105207708B (zh) 2015-09-06 2018-12-18 北京北方烽火科技有限公司 一种波束赋形权向量的生成方法及装置
US9571978B1 (en) * 2016-03-16 2017-02-14 Google Inc. User equipment positioning utilizing motion of high altitude platform
WO2017164925A1 (en) 2016-03-24 2017-09-28 Intel Corporation Method of positioning for 5g systems
US10021667B2 (en) 2016-06-23 2018-07-10 Qualcomm Incorporated Positioning in beamformed communications
CN108064056B (zh) 2016-11-08 2020-12-29 上海朗帛通信技术有限公司 一种ue、基站和服务中心的用于定位的方法和设备
US9836049B1 (en) 2017-05-05 2017-12-05 Pinnacle Vista, LLC Relay drone system
KR102392079B1 (ko) 2018-05-04 2022-05-02 주식회사 케이티 차세대 무선망에서 포지셔닝을 수행하는 방법 및 장치
US11442135B2 (en) 2018-05-31 2022-09-13 Qualcomm Incorporated Positioning methods for wireless networks that utilize beamformed communication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170366244A1 (en) * 2014-12-16 2017-12-21 Lg Electronics Inc. Method for receiving reference signal in wireless communication system, and apparatus therefor
US20180054286A1 (en) * 2015-04-08 2018-02-22 Intel IP Corporation Positioning reference system (prs) design enhancement
WO2018069208A1 (en) * 2016-10-10 2018-04-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. User equipment localization in a mobile communication network

Also Published As

Publication number Publication date
US11442135B2 (en) 2022-09-13
US20220349981A1 (en) 2022-11-03
TW202005308A (zh) 2020-01-16
US20190369201A1 (en) 2019-12-05
US11885896B2 (en) 2024-01-30
WO2019232456A1 (en) 2019-12-05
CN112205040A (zh) 2021-01-08
CN112205040B (zh) 2022-09-02
TW202333468A (zh) 2023-08-16
EP3804426A1 (en) 2021-04-14
KR20210014683A (ko) 2021-02-09

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